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Page 30 of 290

 Description

553-3001-105

Standard 5.00

June 1999

Coder/Decoder circuit

The Coder/Decoder (codec) performs analog to 

digital (A/D) and digital to analog (D/A) conversion of the line analog 
voiceband signal to and from a digital PCM signal. This signal can be coded 
and decoded using either the A-Law or the µ-Law companding algorithm. On 
some analog line cards the decoding algorithm depends of the type of codec 
installed when the board is built. On others, it is an option selected using a 
software overlay.

Variable gain filters

Audio signals received from the analog phone line are 

passed through a low-pass Analog to Digital (A/D) monolithic filter that 
limits the frequency spread of the input signal to a nominal 200 to 3400 Hz 
bandwidth. The audio signal is then applied to the input of the codec. Audio 
signals coming from the codec are passed through a low-pass A/D monolithic 
filter that integrates the amplitude modulated pulses coming from the codec, 
and then filters and amplifies the result. On some of the line cards, the gain of 
these filters can be programmed by the system controller. This allows the 
system to make up for line losses according to the loss plan.

Balancing network

Depending on the card type, the balancing network 

provides a 600 ¾, 900 ¾, 3COM or 3CM2 impedance matching network.
It also converts the 2-wire transmission path (tip and ring) to a 4-wire 
transmission path (Rx/ground and Tx/ground). The balancing network is 
usually a transformer/analog (hybrid) circuit combination, but can also be a 
monolithic subscriber line interface circuit (SLIC) on the newer line cards.

Line interface and foreign voltage protection

The line interface unit 

connects the balancing network to the telephone tip and ring pairs. The 
off-premise line card (NT1R20) has circuitry that protects the line card from 
foreign voltage surges caused by inadvertent power line connections and 
lightning surges. This protection is necessary whenever the telephone line 
leaves the building where the switch is installed. 

Содержание NT1R20

Страница 1: ...igital device pursuant to Part 15 of the FCC rules and the radio interference regulations of Industry Canada These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may...

Страница 2: ......

Страница 3: ...scription 553 2201 193 This document also contains information on the new NT1R20 Off premise Station Analog Line Card July 1995 Standard release 2 00 This document is reissued to incorporated technical corrections Changes are noted by revision bars in the margin August 1996 Standard release 3 00 This document is reissued to include the NT5D11 Line side T1 Interface Card Changes are noted by revisi...

Страница 4: ...iv 553 3001 105 Standard 5 00 June 1999 iv ...

Страница 5: ...ards 10 Installation 11 Operation 15 Host interface bus 15 Analog line interface units 29 Digital line interface units 32 Analog line call operation 34 Digital line call operation 40 Line side T1 call operation 40 Voice frequency audio level 48 Off premise line protection 48 Line protectors 49 Line protection grounding 49 Line and telephone components 51 NT1R20 Off Premise Station Analog Line Card...

Страница 6: ...nnector pin assignments 63 Configuring the OPS analog line card 65 Jumper strap settings 65 Software service changes 65 Port to port loss configuration 68 Applications 69 Off premise station application 69 Other applications 69 Transmission considerations 71 NT5D11 Line side T1 Interface Card 75 Introduction 75 Physical description 75 Card connections 76 Faceplate 76 Functional description 80 Over...

Страница 7: ...s 111 Configuring parameters 114 Alarm operation and reporting 118 Performance counters and reporting 121 Testing 123 Applications 127 NT5D33 and NTRB34 Line side E1 Interface Cards 131 Introduction 131 Functional description 137 Overview 138 Card interfaces 139 Electrical specifications 141 E1 channel specifications 142 Power requirements 142 Foreign and surge voltage protections 142 Installation...

Страница 8: ...ental specifications 197 Configuration 197 Software service changes 198 NT8D02 Digital Line Card 199 Introduction 199 Physical description 199 Functional description 201 Card interfaces 203 Digital line interfaces 203 Card control functions 204 Circuit power 205 Electrical specifications 206 Digital line interface specifications 206 Power requirements 207 Foreign and surge voltage protections 207 ...

Страница 9: ...ions 223 Environmental specifications 223 Connector pin assignments 224 Configuration 227 Jumper and switch settings 227 Software service changes 227 QPC192 Off Premise Extension OPX Analog Line Card 229 Introduction 229 Physical description 229 Functional description 231 Card interfaces 231 Line interface units 231 Codecs 232 Multiplex control 232 Electrical specifications 233 Analog line interfa...

Страница 10: ...ace 245 Power requirements 246 Foreign and surge voltage protections 247 Environmental specifications 247 Connector pin assignments 248 Configuration 250 Jumper strap settings 250 Software service changes 250 QPC578 Integrated Services Digital Line Card 253 Introduction 253 Physical description 254 Functional description 256 Card interfaces 257 Line interface units 257 Multiplex control 257 Circui...

Страница 11: ...hysical description 265 Functional description 267 Card interfaces 268 Codecs 269 Message waiting lamp logic 269 Multiplex control 269 Electrical specifications 270 Analog line interface 270 Power requirements 271 Foreign and surge voltage protections 272 Environmental specifications 272 Connector pin assignments 273 Configuration 276 Jumper strap settings 276 Software service changes 276 List of ...

Страница 12: ...xii Contents 553 3001 105 Standard 5 00 June 1999 ...

Страница 13: ... shown installed in an NT8D13 PE Module 13 Figure 5 Network connections to PE IPE modules 17 Figure 6 Typical IPE analog line card architecture 18 Figure 7 DS 30X loop data format 21 Figure 8 Typical PE line card architecture 24 Figure 9 SL 1 Network loop data format 27 Figure 10 Typical analog line interface unit block diagram 29 Figure 11 Digital line interface unit block diagram 32 Figure 12 Ca...

Страница 14: ...rd typical cross connection example 64 Figure 19 OPS analog line card jumper block locations 67 Figure 20 Traditional OPS application configuration 70 Figure 21 Line side T1 card faceplate 77 Figure 22 Line side T1 card block diagram 80 Figure 23 Line side T1 card T1 protocol dip switch locations 88 Figure 24 Line side T1 card connection using the NT5D13AA Line side T1 Cable 9 9 Figure 25 Line sid...

Страница 15: ...e card faceplate 134 Figure 34 Line side E1 card block diagram 137 Figure 35 Line side E1 card E1 protocol dip switch locations 145 Figure 36 Line side E1 card connecting two or more cards to the MMI 161 Figure 37 HELP H screen 168 Figure 38 Set Simple S S no screen 175 Figure 39 Set Simple S S yes screen 175 Figure 40 Set Mode S M CR screen 176 Figure 41 Set Mode S M Table screen Part One 177 Fig...

Страница 16: ...1 MMI External loopback test 189 Figure 52 MMI Network loopback test 189 Figure 53 LEI connection to peripheral equipment 190 Figure 54 LEI in off premise extension application 191 Figure 55 LEI connection to Norstar system 191 Figure 56 Digital line card faceplate 200 Figure 57 Digital line card block diagram 202 Figure 58 Digital line card typical cross connection example 209 Figure 59 Digital l...

Страница 17: ...g line card jumper block locations 239 Figure 68 Basic 500 2500 analog line card faceplate 242 Figure 69 Basic 500 2500 analog line card block diagram 243 Figure 70 Basic 500 2500 analog line card typical cross connection example 249 Figure 71 Basic 500 2500 analog line card jumper block locations 251 Figure 72 Integrated services digital line card faceplate 255 Figure 73 Integrated services digit...

Страница 18: ...00 June 1999 Figure 77 16 port message waiting analog line card block diagram 267 Figure 78 16 port message waiting analog line card typical cross connection example 274 Figure 79 16 port message waiting analog line card jumper block locations 277 ...

Страница 19: ... 5 Ground Start Call Processing A B Bit Settings 47 Table 6 Line protection device ordering information 50 Table 7 OPS analog line card electrical characteristics 60 Table 8 OPS analog line card power requirements 61 Table 9 OPS analog line card ringer limitations 62 Table 10 OPS analog line card environmental specifications 62 Table 11 OPS analog line card backplane pinouts 63 Table 12 OPS analog...

Страница 20: ...ttings 91 Table 19 Line side T1 card XPEC address dip switch settings Switch S1 positions 3 6 92 Table 20 Line side T1 card T1 Switch 2 S2 dip switch settings 93 Table 21 Line side T1 card CPE or CSU distance dip switch settings Switch S2 positions 3 5 93 Table 22 Line side T1 card NT8D11 CE PE Module vintage level port cabling 94 Table 23 Line side T1 card NT8D37 IPE Module vintage level port cab...

Страница 21: ...e 35 Line side E1 card Switch 1 dip switch settings 148 Table 36 Line side E1 card signaling type dip switch settings 148 Table 37 Line side E1 card XPEC address dip switch settings Switch S1 positions 3 6 149 Table 38 Line side E1 card E1 Switch 2 S2 dip switch settings 150 Table 39 Line side E1 card NT8D11 CE PE Module vintage evel port cabling 152 Table 40 Line side E1 card NT8D37 IPE Module vi...

Страница 22: ...ransmission electrical characteristics 197 Table 50 CLASS modem card environmental specifications 197 Table 51 Digital line card line interface unit electrical characteristics 206 Table 52 Digital line card power required 207 Table 53 Digital line card environmental specifications 208 Table 54 Digital line card backplane pinouts 210 Table 55 Analog message waiting line card line interface unit ele...

Страница 23: ...OPX analog line card environmental specifications 235 Table 65 OPX analog line card backplane pinouts 236 Table 66 Basic 500 2500 analog line card line interface electrical characteristics 245 Table 67 Basic 500 2500 analog line card maximum number of voice calls recommended 246 Table 68 Basic 500 2500 analog line card power requirements 246 Table 69 Basic 500 2500 analog line card environmental s...

Страница 24: ...t message waiting analog line card line interface unit electrical characteristics 270 Table 76 16 port message waiting analog line card maximum number of ringers per directory number loop 271 Table 77 16 port message waiting analog line card power requirements 271 Table 78 16 port message waiting analog line card environmental specifications 272 Table 79 16 port message waiting analog line card ba...

Страница 25: ... 1 System planning and engineering guide for Meridian 1 system engineering 553 3001 151 Spares planning 553 3001 153 Meridian 1 equipment identification 553 3001 154 Summary of transmission parameters 553 2201 182 See the Meridian 1 System installation and maintenance guide for Meridian 1 system installation procedures 553 3001 210 Circuit card installation and testing 553 3001 211 Meridian 1 gene...

Страница 26: ...e installation and management and a detailed description of all X11 features and services This information is contained in two documents X11 software management 553 3001 300 X11 features and services See the X11 input output guide for a description of all administration and maintenance programs and X11 system messages guide for information about system messages ...

Страница 27: ...alled and programmed It then provides detailed technical specifications on each of the cards This document describes nine line cards NT1R20 Off Premise Station Analog Line Card NT5D11 Line side T1 Interface Card NT5D33 and 34 Line Side E1 Interface Card NT8D02 Digital Line Card NT8D09 Analog Message Waiting Line Card QPC192 Off Premise Extension Line Card QPC452 Basic 500 2500 Line Card QPC578 Int...

Страница 28: ...n call termination and feature operation for switched voice and data calls executes system administration and configuration functions coordinates system diagnostic activities controls system utility functions such as software loading initialization data dumping traffic logging and system auditing Network equipment Network interface circuit cards perform data and control switching functions between...

Страница 29: ...and mass storage Peripheral Equipment Terminal Equipment Analog line cards Analog telephone Analog phone line Digital line cards Trunk cards Customer modem Analog phone line Digital telephone Digital phone line Terminal 553 6148 Digital console Digital phone line Central office CO trunk Central office WATS trunk Tie trunk to other PBXs 4 wire E M trunk ...

Страница 30: ...ct the Meridian 1 switch to terminal equipment such as telephones and modems over 2 wire tip and ring line facilities The line card and the terminal equipment that it connects to can be either analog or digital in nature Similar line facilities are used for both Line side T1 line cards are used to connect the Meridian 1 switch to T1 compatible terminal equipment within the installation Line side T...

Страница 31: ...rrupted dial tone Yes IPE NT5D11 Line side T1 Interface Card 24 T1 None Yes IPE NT5D33 34 Line side E1 Interface Card 30 E1 None Yes IPE NT8D02 Digital Line Card 16 Digital Message waiting signal forwarded to digital phone for display No IPE NT8D09 Analog Message Waiting Line Card 16 Analog Lamp No IPE QPC192 Off Premise Extension Line Card 4 Analog None No PE QPC452 Basic 500 2500 Line Card 8 Ana...

Страница 32: ...ver is first picked up It also provides battery reversal answer and disconnect analog line supervision and hook flash disconnect analog line supervision features NT5D11 Line side T1 Interface Card The NT5D11 Line side T1 Interface Card is an intelligent 24 channel digital line card that is used to connect the Meridian 1 switch to T1 compatible terminal equipment on the line side T1 compatible term...

Страница 33: ...or simultaneous voice and data service over a single twisted pair of standard telephone wire NT8D09 Analog Message Waiting Line Card The NT8D09 Analog Message Waiting Line Card is an intelligent 16 channel analog line card designed to be used with 2 wire terminal equipment such as 500 2500 type analog phones modems and key systems This card can also provide a high voltage low current signal on the...

Страница 34: ...rd does not support the message waiting feature QPC452 Basic 500 2500 Line Card The QPC452 Basic 500 2500 Line Card is an eight channel analog line card designed to be used with 2 wire terminal equipment such as 500 2500 type analog phones modems and key systems This card does not support the message waiting feature and does not provide hazardous and surge voltage protection QPC578 Integrated Serv...

Страница 35: ...where an IPE line card can be installed in an NT8D37 IPE Module Peripheral equipment PE line cards can be installed in any PE slot of the NT8D13 PE Module This is shown in Figure 4 Figure 2 IPE line cards shown installed in an NT8D11 CE PE Module Common Peripheral Equipment CE PE Module CE PE Pwr Sup 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 FDI CPU Mem SLP 0 SLP 4 SLP 8 SLP 12 SLP 16 SLP 20 Net DT...

Страница 36: ... installed in an NT8D37 IPE Module Intelligent Peripheral Equipment Superloop Shelf IPE PE Module PE Pwr Sup Rng Gen Intelligent line cards Intelligent trunk cards BRSC Intelligent line cards Intelligent trunk cards BRSC NT8D01 Controller Card 553 3092 0 2 3 4 5 6 7 Cont 9 11 12 13 15 1 8 14 10 ...

Страница 37: ...E line cards shown installed in an NT8D13 PE Module 1 2 3 4 5 6 7 8 9 10 X1 X2 X3 X4 X5 DLB X6 Y1 X7 Y2 X8 Y3 X9 Y4 X10 Y5 PE Pwr Sup Rng Gen PE Module PE Peripheral Equipment Loop Shelf Line and trunk cards Line and trunk cards QPC659 Peripheral Buffer 553 3101 ...

Страница 38: ...tor on the PE or IPE module to the module I O panel Connect a 25 pair cable from the module I O panel connector to the main distribution frame MDF Connect the line card output to the selected terminal equipment at the MDF Configure the individual line interface unit using the Single line Telephone Administration program LD 10 for analog line interface units and Multi line Telephone Administration ...

Страница 39: ...rsion of this bus the intelligent peripheral equipment IPE bus Meridian 1 based switches are designed to be able to interface with the older PE based cards This allows existing SL 1 switches to be upgraded to the Meridian 1 architecture without the expense of throwing away the existing wiring PE modules and line and truck cards Cards based on the IPE bus have a built in microcontroller where cards...

Страница 40: ...1 4 in 31 75 x 25 4 x 2 2 cm 12 5 x10 0 x 0 875 in Network Interface SL 1 Network Loops DS 30X Loops Communications Interface via the SL 1 Network Loop card LAN Link Microcontroller None 8031 8051 Family Peripheral Interface Card QPC659 Dual loop Peripheral Buffer Card NT8D01 Controller Card Network Interface Card QPC414 Network Card NT8D04 Superloop Network Card Modules NT8D13 PE Module NT8D37 IP...

Страница 41: ...D37 IPE Module Common Equipment Network NT8D13 PE Module Module backplane NT8D02 Digital Line Card NT8D09 Analog Message Waiting Line Card QPC414 Network Card QPC659 Dual Loop Peripheral Buffer Card QPC192 OPX Analog Line Card 553 6149 SL 1 Network loop QPC452 Basic 500 2500 Line Card QPC578 Integrated Services Digital Line Card QPC789 Analog Message Waiting Line Card NT5D11 Line Side T 1 Line Car...

Страница 42: ...l IPE analog line card architecture Input output interface control Codec PCM Micro controller DS 30X interface 5 12 MHz clock Tx PCM Async card LAN link Front panel LED Card LAN interface Tip Ring Codec PCM Line interface unit power Rx PCM 1 kHz frame sync Card slot address Back plane Con troller card Line signaling interface Control logic Signaling and status Control Address data bus 553 6150 Pow...

Страница 43: ... but is not limited to the following polling reporting of self test status CPU initiated card reset reporting of card ID card type and hardware vintage reporting of firmware version downloading line interface unit parameters reporting of line interface unit configuration enabling disabling of the DS 30X network loop bus reporting of card status or T1 link status DS 30X loops The line interfaces pr...

Страница 44: ...idian 1 common equipment Each bus has 32 channels for pulse code modulated PCM voice data Each channel consists of a 10 bit word see Figure 7 Eight of the 10 bits are for PCM data one bit is the call signaling bit and the last bit is a data valid bit The eight bit PCM portion of a channel is called a timeslot The DS 30X loop is clocked at 2 56 Mbps one half the 5 12 MHz clock frequency supplied by...

Страница 45: ...cations is the exchange of control and status data between IPE line or trunk cards and the CE CPU by way of the NT8D01 Controller Card Maintenance data is transported via the card LAN link This link is composed of two asynchronous serial buses called the Async card LAN link in Figure 6 The output bus is used by the Meridian 1 controller for output of control data to the line card The input bus is ...

Страница 46: ...N to monitor their presence and operational status The slave card sends replies to the controller on the input bus along with its card slot address for identification In this reply the slave informs the controller if any change in card status has taken place The controller can then prompt the slave for specific information Slaves only respond when prompted by the controller they do not initiate ex...

Страница 47: ... in the PE backplane A four bit encoded line address is used to select an individual line interface unit upon that card see Table 3 The peripheral buffer card maintains a table of which line card and line unit address is assigned to a particular timeslot in the SL 1 network loop It uses that information to generate the card enable and line address signals at the proper time A line unit is enabled ...

Страница 48: ... PE line card architecture Multiplex control logic Signaling logic Tip Ring SL 1 Network loop Rx Tx Card enable Line address Voice Signal ing 553 6155 Timeslot 0 Front panel LED Line Interface Unit Power supply 5 V dc analog hybrid 15 V dc analog power 48 V dc battery Ringing Rsync ...

Страница 49: ...nsity Cards Dual Density Cards Quad Density Cards 1 1 1 0 1 1 1 0 1 2 1 1 0 0 3 1 0 1 1 4 1 0 1 0 5 1 0 0 1 6 1 0 0 0 7 0 1 1 1 8 0 1 1 0 9 0 1 0 1 10 0 1 0 0 11 0 0 1 1 12 0 0 1 0 13 0 0 0 1 14 0 0 0 0 15 Note Single density line cards have either two or four line units per card Dual density line cards have eight line units per card Quad density line cards have 16 line units per card ...

Страница 50: ... code modulated PCM data Each of the 32 channels is carried at 64 kbps the standard rate for a digitized voice channel The total data rate is therefore 2 048 Mbps Data on the loop is bit interleaved instead of byte interleaved as it is on the DS 30X loop Instead of having a byte of data occupy eight successive timeslots on the loop the SL 1 Network loop has the first 32 successive timeslots occupi...

Страница 51: ... 290 Line cards Description Figure 9 SL 1 Network loop data format TS0 SIGN 2 048 MHz TS1 SIGN TS2 SIGN TS31 SIGN TS0 MSB TS1 MSB 553 6152 TS0 LSB TS1 LSB TS29 LSB TS30 LSB TS31 LSB 32 time slots x 8 bits 256 bits per frame ...

Страница 52: ...g timeslot zero An enable signal TS0 timeslot zero enable is generated during each timeslot zero When the network card has a message for a particular peripheral card it asserts the card enable signal for that card along with the TS0 signal This continues on successive TS0s until a complete message has been sent The network card regularly polls the PE cards during TS0 to see if any of them has a me...

Страница 53: ... 10 shows a typical example of the logic that performs these functions Each part of the analog line interface unit is discussed in the following section Figure 10 Typical analog line interface unit block diagram CODEC 2 wire to 4 wire conversion Line interface and protection Message waiting Variable gain filters Impedance matching transformer Balancing Network Tip Ring DS 30X or SL 1 network loop ...

Страница 54: ...ntegrates the amplitude modulated pulses coming from the codec and then filters and amplifies the result On some of the line cards the gain of these filters can be programmed by the system controller This allows the system to make up for line losses according to the loss plan Balancing network Depending on the card type the balancing network provides a 600 900 3COM or 3CM2 impedance matching netwo...

Страница 55: ...ne When the current draw exceeds a preset value the circuit generates an off hook signal that is transmitted back to the system controller The message waiting circuit on message waiting line cards monitors the status of the message waiting signal and applies 150 V dc power to the tip lead when activated This voltage is used to light the message waiting lamps on phones that are equipped with that f...

Страница 56: ...gure 11 Each digital line interface unit contains a digital line interface circuit DLIC The purpose of each digital line interface circuit is to demultiplex data from the DS 30X Tx channel into integrated voice and data bitstreams and transmit those bitstreams as Bi Polar Return to Zero Alternate Mark Inversion BPRZ AMI data to the TCM loop It also does the opposite receives BPRZ AMI bitstreams fr...

Страница 57: ... controller can remove the 15 V dc power supply from the TCM loop interface This happens when either the card gets a command from the NT8D01 Controller Card to shut down the channel or the digital line card detects a loss of the 1 KHz frame synchronization signal Each TCM loop interface circuit can service loops up to 3500 ft in length when using 24 gauge wire The circuit allows for a maximum AC s...

Страница 58: ...s towards the analog line card and ringing is tripped see Figure 12 Outgoing calls For outgoing calls from the near end station a line interface unit is seized when the station goes off hook placing a low resistance loop across the tip and ring leads towards the analog line card see Figure 13 When the card detects the low resistance loop it prepares to receive digits When the Meridian 1 is ready t...

Страница 59: ...emoves timeslot assignments Person at near end station recognizes end of call and hangs up No battery current drawn Far end station goes off hook and addresses dials up near end station The Meridian 1 receives the incoming call on a trunk and determines that the call is for a specific unit terminal number TN and assigns message timeslots Meridian 1 applies 20 Hz ringing to ring lead Low resistance...

Страница 60: ...current drawn Near end station goes off hook Battery current is drawn causing detection of off hook state CPU determines unit terminal number TN and assigns message timeslots Low resistance loop Dial tone is applied to the near end station from the Meridian 1 Call request Dial tone Addressing signals Outpulsing Near end station dials number loop pulsing or DTMF tones Near end station Dial tone Mer...

Страница 61: ...th far end answer supervision and far end disconnect supervision signals to the terminal device In an intelligent pay phone application these signals provide the information necessary to accurately compute toll charges In the idle state and during dialing and ringing at the far end the line card provides a ground signal on the tip lead and battery on the ring lead see Figure 14 When the far end an...

Страница 62: ...tation dials number loop pulsing or DTMF tones Dial tone removed Meridian 1 detects start of dialing and removes dial tone Ringback or busy Meridian 1 decodes addressing routes call and supplies ringback tone to near end station if far end station is on hook Busy tone supplied if far end station is busy When call is answered either absolute or assumed answer as programmed ringback tone is removed ...

Страница 63: ...sconnect signalling from the far end removes the timeslot assignments and sends a hook flash tip removed from ground to the near end station Near end station on hook Tip open battery on ring Tip open battery on ring The near end station responds by going on hook presenting a high resistance loop to the Meridian 1 High resistance loop Line card unit idle Ground on tip battery on ring At the end of ...

Страница 64: ...formed using the A B robbed bit signaling standard for T1 communication A B robbed bit signaling simulates standard analog signaling by sending a meaningful combination of ones and zeros across the line that correlates to the electrical impulses that standard analog signaling sends For example to represent that an analog line interface unit is idle the analog line card provides a ground on the tip...

Страница 65: ...through the public switched telephone network To provide the ringing signal to a telephone the line side T1 card simulates an additional 90V on the ring lead to the terminal equipment by alternating the transmit B bit between 0 and 1 0 during ring on 1 during ring off When an incoming call is answered by the terminal equipment going off hook the terminal equipment simulates tripping the ringing an...

Страница 66: ...e following configuration parameters must exist X11 software release 21 or later is required and the Supervised Analog Line SAL feature must be configured for each line side T1 port Note By default the SAL feature opens the tip side for 750 m s in loop start operation This is configurable in 10 m s increments For outgoing trunk calls the trunk facility must provide far end disconnect supervision I...

Страница 67: ...tting the transmit A bit to 1 and transmit B bit to 1 Accordingly an on hook telephone simulates an open loop toward the line side T1 card causing the line side T1 card s receive bits to be set to A 0 and B 1 Incoming Calls Incoming calls to terminal equipment that is connected to the line side T1 card can originate either from stations that are local served by the Meridian 1 PBX or remote served ...

Страница 68: ...ff hook 0 1 1 1 Call Disconnect from far end Steady state call in progress 0 1 1 1 Far end disconnects by dropping loop current and line side T1 card changes Transmit A bit to 1 momentarily 1 1 1 1 Terminal equipment responds causing Receive A bit to change to 0 1 1 0 1 Line side T1 responds by changing its Transmit A bit to 0 Call is terminated and set to idle state 0 1 0 1 Call disconnect from t...

Страница 69: ... to 1 it responds by simulating open loop causing the line side T1 s receive A bit to change to 0 The call is terminated and the interface is once again in the idle condition For the line side T1 card to support distant end disconnect in ground start mode the following configuration parameters must exist X11 software release 21 or later is required and the Supervised Analog Line SAL feature must b...

Страница 70: ...tart interface equipment relating to start of dialing distant end disconnect and glare potential Distant end disconnect restrictions If the supervised analog line SAL feature is not available in your Meridian 1 software the line side T1 card is not capable of indicating to the CPE equipment when a call has been terminated by the distant end In this case the line side T1 card will continue to provi...

Страница 71: ...ad and ringing on ring lead 0 0 1 1 1 Outgoing Calls from terminal equipment Idle 1 1 0 1 Terminal equipment goes off hook 1 1 0 0 The line side T1 simulates grounding its tip lead 0 1 0 0 Terminal equipment opens ring ground and closes loop 0 1 1 1 Call Disconnect from far end Steady state call in progress 0 1 1 1 The line side T1 ungrounds tip 1 1 1 1 Terminal equipment opens loop current 1 1 0 ...

Страница 72: ...down and allowing the CPE equipment to complete the call origination as in normal ground start operation If both incoming and outgoing calls are to be handled through the line side T1 interface separate channels should be configured in the Meridian 1 system and the CPE equipment for each call direction to eliminate the possibility of glare conditions on call origination Voice frequency audio level...

Страница 73: ...d from accidental voltages that are within the limit of the capacity of the protection device Absolute protection from lightning strikes and other stray voltages cannot be guaranteed but proven cases have shown that the use of line protection devices significantly reduces the possibility of damage Nortel Networks has tested line protection devices from three manufacturers see Table 6 Each manufact...

Страница 74: ...ine Digital Line UP2S 235 UP2S 75 ITW Linx Communications 201 Scott Street Elk Grove Village IL 60007 708 952 8844 or 800 336 5469 6AP 6DP Oneac Corporation 27944 North Bradley Road Libertyville IL 60048 9700 800 553 7166 or 800 327 8801 x555 ESP 200 ESP 050 EDCO Inc of Florida 1805 N E 19th Avenue P O Box 1778 Ocala FL 34478 904 732 3029 or 800 648 4076 ...

Страница 75: ...with Message Waiting Note 1 The NT1R20 Off Premise Station Line Card and the QPC192 Off Premise Extension Line Card both have protection against lightning strikes and voltage surges built onto the card These circuits protect the card and the PBX but do not protect the instrument on the other end of the line Line protection devices should still be installed at the cross connect terminals at the rem...

Страница 76: ...Page 52 of 290 Description 553 3001 105 Standard 5 00 June 1999 ...

Страница 77: ...stration program LD 10 Physical description The OPS analog line card mounts in any IPE slot The line interface and common multiplexing circuitry is mounted on a 31 75 cm by 25 40 cm 12 5 in by 10 in printed circuit board The OPS analog line card connects to the IPE backplane through a 160 pin connector shroud The backplane is cabled to the input output I O panel on the rear of the module which is ...

Страница 78: ...e card is installed the LED remains lit for two to five seconds while the self test runs If the self test completes successfully the LED flashes off on three times and remains lit until the card is configured and enabled in software then the LED goes out If the LED does not follow this pattern or operates in any other manner such as continually flashing or remaining weakly lit the card should be r...

Страница 79: ... Page 55 of 290 Line cards Description Figure 16 OPS analog line card faceplate S OPS Anlg LC NT1R20 Rlse 0x Card lock latch Card lock latch This symbol indicates that field selectable jumper strap settings are located on this card LED 553 6190 ...

Страница 80: ...LAN link Front panel LED Card LAN interface Tip Line interface units 0 3 Ring Codec PCM Analog hybrid XFMR Signaling relays ringing battery reversal Line interface units 4 7 Line interface unit power Rx PCM 1 kHz frame sync Controller card Line signaling interface Control logic Reg Signaling and status Address data bus 553 6193 Power supplies 5 V dc analog hybrid 15 V dc analog power 8 5 V dc 5 V ...

Страница 81: ...ybrid circuit Relays are also provided in each unit to apply ringing onto the line Signal detection circuits monitor on hook off hook signaling Two codecs are provided for performing A D and D A conversion of line analog voiceband signals to digital PCM signals Each codec supports four line interface units and contains switchable pads for control of transmission loss on a per unit basis The follow...

Страница 82: ...ink to the controller card The microcontroller controls the following reporting to the CE CPU via the card LAN link card identification card type vintage and serial number firmware version self test status programmed configuration status receipt and implementation of card configuration programming of the codecs enabling disabling of individual units or entire card programming of input output inter...

Страница 83: ... control portion of the card provides circuits that establish supervise and take down call connections These circuits work with the system CPU to operate the line interface circuits during calls The circuits receive outgoing call signaling messages from the CPU and return incoming call status information over the DS 30X network loop Circuit power The 8 5 V dc input is regulated down to 5 V dc for ...

Страница 84: ...S analog line card electrical characteristics Characteristic Specification Terminal impedance TIMP 600 or 900 ohms Balance impedance BIMP 600 or 900 ohms 3COM or 3CM2 DC signaling loop length max 2300 ohm loop including resistance of telephone set with nominal battery of 48 V dc Battery supply voltage 42 to 52 5 V dc Minimum detected loop current 16 mA Ground potential difference 3 V Line leakage ...

Страница 85: ... system power supply Foreign and surge voltage protection The OPS analog line card meets UL 1489 and CS03 over voltage power cross specifications and FCC Part 68 requirements for hazardous and surge voltage limits Table 8 OPS analog line card power requirements Voltage Tolerance Current max 15 0 V dc 5 150 mA 8 5 V dc 2 200 mA 5 0 V dc 5 100 mA 48 0 V dc 5 350 mA ...

Страница 86: ... 10 shows the environmental specifications of the card Table 9 OPS analog line card ringer limitations ONS Loop Range Maximum Number of Ringers REN 0 10 ohms 3 10 460 ohms 2 OPS Loop Range Maximum Number of Ringers REN 0 10 ohms 3 10 900 ohms 2 900 2300 ohms 1 Table 10 OPS analog line card environmental specifications Parameter Specifications Operating temperature 0 to 60 C 32 to 140 F ambient Ope...

Страница 87: ... wiring plan similar to that used for trunk cards A typical connection example is shown in Figure 18 and a list of the connections to the analog line card are shown in Table 11 See Meridian 1 system installation procedures 553 3001 210 for complete I O panel connector information and wire assignments for each tip ring pair Table 11 OPS analog line card backplane pinouts Backplane Connector Pin Sig...

Страница 88: ...ation Line Card Unit 0 Unit 7 0T 0R 26 1 27 2 Meridian 1 Cross connect OPS or ONS telephone connections A MDF Unit 1 Unit 2 Unit 3 Tip Ring Tip Ring 28 3 29 4 2T 2R 1T 1R 30 5 31 6 Tip Ring NC NC NC Module I O Panel Connector Part of 25 pair cable Note Actual pin numbers may vary depending on the vintage of the card cage and the slot where the card is installed W BL BL W W O O W W G G W W BR BR W ...

Страница 89: ...ne card Before the appropriate balance network can be selected the loop length between the near end Meridian 1 and the far end station must be known To assist in determining loop length Table 13 shows some typical resistance and loss values for the most common cable lengths for comparison with values obtained from actual measurements Software service changes Individual line interface units on the ...

Страница 90: ...ported by the OPS analog line card is 2300 ohms Note 3 Loss of untreated no gain devices metallic line facility Upper loss limits correspond to loop resistance ranges for 26 AWG wire Note 4 The following are the default software impedance settings ONP CLS OPX CLS Termination Impedance TIMP 600 ohms 600 ohms Balanced Impedance BIMP 600 ohms 3CM2 Note 5 Gain treatment such as a voice frequency repea...

Страница 91: ...Premise Station Analog Line Card Page 67 of 290 Line cards Description Figure 19 OPS analog line card jumper block locations 553 6191 J4 0 J4 1 J6 0 J6 1 J7 0 J7 1 J0 0 J0 1 J2 0 J2 1 J3 0 J3 1 J1 0 J1 1 J5 0 J5 1 ...

Страница 92: ...001 400 for LD 97 service change instructions The transmission properties of each line unit are characterized by the OPX or ONP class of service assigned in the Single line Telephone Administration program LD 10 A complete loss plan is given in Summary of transmission parameters 553 2201 182 where the appropriate port to port electrical loss may be determined for connections between any two Meridi...

Страница 93: ...extension to a main subscriber loop bridged onto the loop at the serving CO or PBX Additionally OPX as used to denote off premise extension service should not be confused with the OPX class of service assigned in the Single line Telephone Administration program LD 10 Other applications The operating range and built in protection provisions of the OPS analog line card make it suitable for applicati...

Страница 94: ...d 5 00 June 1999 Figure 20 Traditional OPS application configuration 553 6147 Meridian 1 PBX Public Network Non switched thru connections OPS analog line card port CO trunk card port OPS termination Local CO Distant CO 0 3 5 dB 4 5 dB maximum 7 0 dB total maximum OPS line facility ...

Страница 95: ...inserted between OPS analog line card ports and other Meridian 1 ports in accordance with the Meridian 1 loss plan This plan determines the port to port loss for each call When a port is configured for OPX class of service loss is programmed into the OPS analog line card on a call by call basis When configured for ONP class of service an OPS analog line card port is programmed to a value that is f...

Страница 96: ...ity at the OPS port should approximate that of 600 ohm cable If the OPS line facility loss is greater than 4 5 dB but does not exceed 15 dB line treatment using a switched gain voice frequency repeater VFR will extend the voice range The overall range achievable on an OPS line facility is limited by the signaling range 2300 ohm loop including telephone set resistance Signaling range is unaffected ...

Страница 97: ...reased current Thus as the line Meridian 1 to OPS termination facility gets longer and lossier the increased loudness of the set somewhat compensates for the higher loss assuming direct current feed from the PBX with constant voltage at the feeding bridge However this compensation is not available when the following occurs the termination is a non compensating telephone set the OPS port is served ...

Страница 98: ...Page 74 of 290 NT1R20 Off Premise Station Analog Line Card 553 3001 105 Standard 5 00 June 1999 ...

Страница 99: ...analog line card to the Meridian 1 system software therefore each channel is independently configurable by software control in the Single line Telephone Administration program LD10 The line side T1 card also comes equipped with a Man Machine Interface MMI maintenance program that provides diagnostic information regarding the status of the T1 link Physical description The line side T1 card mounts i...

Страница 100: ... comes equipped with four LED indicators See Figure 21 The LEDs give status indications on the operations as described in Table 14 The STATUS LED indicates that the line side T1 card has successfully passed its self test and therefore is functional When the card is installed this LED remains lit for two to five seconds as the self test runs If the self test completes successfully the LED flashes t...

Страница 101: ...e cards Description Figure 21 Line side T1 card faceplate YEL ALM RED ALM MAINT S LTI Rlse 0x NT5D11 Card lock latch Card lock latch Warning LEDs This symbol indicates that field selectable switch settings are located on this card Card status LED 553 6478 ...

Страница 102: ...far end as long as the near end remains in a red alarm condition Depending on how the Man Machine Interface MMI is configured this LED will remain lit until the following actions occur If the Self Clearing function has been enabled in the MMI the LED will clear the alarm when the alarm condition is no longer detected this is the factory default condition If the Self Clearing function has not been ...

Страница 103: ...in maintenance commands being issued through the MMI See Man Machine T1 maintenance interface software on page 109 for information on T1 link maintenance If the card detects that tests are being run or that alarms have been disabled through the MMI this LED will light and will remain lit until these conditions are no longer detected at which time it will turn off ...

Страница 104: ...m Micro controller Tx PCM Async card LAN link Front panel LEDs Card LAN interface T1 Interface One for all 24 channels Line interface unit power Rx PCM Controller card Digital Gain Loss Pads Slot 1 Motherboard 16 channels Slot 2 Daughterboard 8 channels Mux Seq Reg 553 6476 Power supplies 8 5 V dc 5 V dc logic power T1 Tx Tip Man Machine Interface External Alarm Interface T1 Tx Ring T1 Rx Tip T1 R...

Страница 105: ...rface card line side functionality would not be supported Previously the only way to achieve the line side functionality was to use analog ports and channel bank equipment With the line side T1 interface a direct connection is provided between the Meridian 1 and the peripheral equipment No channel bank equipment is required resulting in a more robust and reliable connection The line side T1 interf...

Страница 106: ...ng bitstreams onto the DS 30X network loop The line interface circuit performs the following Provides an industry standard DSX 1 0 to 655 feet interface Converts DS 30X signaling protocol into FXO A and B robbed bit signaling protocol Provides switch selectable transmission and reception of T1 signaling messages over a T1 link in either loop or ground start mode Signaling and control The line side...

Страница 107: ...l of the T1 line interfaces enabling disabling of individual units or entire card programming of loop interface control circuits for administration of channel operation maintenance diagnostics interface with the line card circuit converts on off hook and ringer control messages from the DS 30X loop into A B bit manipulations for each time slot in the T1 data stream using robbed bit signaling the f...

Страница 108: ...rogram control Man Machine Interface MMI The line side T1 card provides an optional man machine interface that is primarily used for T1 link performance monitoring and problem diagnosis The MMI provides alarm notification T1 link performance reporting and fault isolation testing The interface is accessed through connections from the I O panel to a terminal or modem Multiple cards up to 64 can be s...

Страница 109: ...switch settings Power requirements The line side T1 card requires 15 V 15 V and 5 V from the backplane One NT8D06 Peripheral Equipment Power Supply AC or NT6D40 Peripheral Equipment Power Supply DC can supply power to a maximum of eight line side T1 cards Table 15 Line side T1 card line interface unit electrical characteristics Characteristics Description Framing ESF or D4 Coding AMI or B8ZS Signa...

Страница 110: ...nstall a channel service unit CSU as part of your terminal equipment to provide external line protection Environmental specifications Table 17 shows the environmental specifications of the line side T1 card Table 17 Line side T1 card environmental specifications Parameter Specifications Operating temperature normal 15 to 30 C 59 to 86 F ambient Operating temperature short term 10 to 45 C 50 to 113...

Страница 111: ...re MMI optional Steps 1 5 are explained in this section Step 6 is covered in Man Machine T1 maintenance interface software on page 109 Dip switch settings Begin your installation and configuration of the line side T1 card by selecting the proper dip switch settings for your environment The line side T1 card contains two dip switches each containing eight switch positions They are located in the up...

Страница 112: ...Page 88 of 290 NT5D11 Line side T1 Interface Card 553 3001 105 Standard 5 00 June 1999 Figure 23 Line side T1 card T1 protocol dip switch locations 553 6479 S1 S2 dip switches ...

Страница 113: ...s of the shelf must be set by this dip switch The shelf address dip switch can be from 0 15 16 being the maximum number of line side T1 IPE shelves a maximum of 64 line side T1 cards capable of daisy chaining to a single MMI terminal For clarity and ease it is recommended that this address be set the same as the address of the peripheral controller identifier in overlay 97 for type XPE However thi...

Страница 114: ...when the off hook line processing is invoked on T1 failure This may prevent DID trunks from receiving incoming calls until the line side T1 lines time out and release the DTRs Daisy Chaining to MMI If you plan to install two or more line side T1 cards and you plan to use the MMI you will want to daisy chain your cards together to use one MMI terminal or modem see Figure 25 on page 105 Make your se...

Страница 115: ... command Display Configuration See Man Machine T1 maintenance interface software on page 109 for details on how to invoke this command Table 18 Line side T1 card T1 Switch 1 S1 dip switch settings Dip Switch Number Characteristic Selection 1 MMI port speed selection On 1200 baud Off 2400 baud 2 T1 signaling On Ground start Off Loop start 3 6 XPEC Address for the line side T1 card See Table 19 7 No...

Страница 116: ...6 XPEC Address S1 Switch Position 3 S1 Switch Position 4 S1 Switch Position 5 S1 Switch Position 6 00 Off Off Off Off 01 Off Off Off On 02 Off Off On Off 03 Off Off On On 04 Off On Off Off 05 Off On Off On 06 Off On On Off 07 Off On On On 08 On Off Off Off 09 On Off Off On 10 On Off On Off 11 On Off On On 12 On On Off Off 13 On On Off On 14 On On On Off 15 On On On On ...

Страница 117: ... 3 5 CPE or CSU distance See Table 21 6 Line processing on T1 link failure On On hook Off Off hook 7 Daisy chaining to MMI On Yes Off No 8 MMI Master or Slave On Master Off Slave Table 21 Line side T1 card CPE or CSU distance dip switch settings Switch S2 positions 3 5 Distance S2 Switch Position 3 S2 Switch Position 4 S2 Switch Position 5 0 133 On Off Off 134 266 Off On On 267 399 Off On Off 400 ...

Страница 118: ...the first pair of the 25 pair I O connector Certain vintage levels have dedicated 25 pair I O connectors only for card slots 0 4 8 and 12 These vintage levels are cabled with only 16 pairs of wires from each card slot to the I O panel Some of the 25 pair I O connectors are split between adjacent card slots Other vintage levels cable each card slot to the I O panel using a unique 24 pair connector ...

Страница 119: ...ed 24 ports to the I O panel the line side T1 card can be installed in any pair of card slots 0 9 Vintage levels cabling 16 ports For modules with vintage levels that cabled 16 ports to the I O panel you can install the line side T1 card into the following card slot pairs Table 23 Line side T1 card NT8D37 IPE Module vintage level port cabling Vintage Level Number of ports cabled to I O panel NT8D3...

Страница 120: ...rnal I O cable at the IPE and CE PE module I O panel connector for card slots that are otherwise restricted Alternatively all line side T1 card connections can be made at the main distribution frame instead of connecting the NT5D13 Line side T1 card external I O cable at the I O panel This eliminates these card slots restrictions Available and restricted card slots in the NT8D37 IPE Module If you ...

Страница 121: ...rd motherboard slot to the I O panel and re arranging the three backplane connectors for the affected card slots This will permit the connection of the NT5D13AA Line side T1 card carrier and maintenance external I O cable at the IPE and CE PE module I O panel connector for card slots that are otherwise restricted Alternatively all line side T1 card connections can be made at the main distribution ...

Страница 122: ...o the input output I O panel on the rear of the IPE module The connections from the line side T1 card to the I O panel are made with the NT8D81AA Tip and Ring cables provided with the IPE module Cabling from the I O panel with the NT5D13AA Line side T1 I O cable Normally you will make the connection from the I O panel to the T1 link and other external devices through the NT5D13AA Line side T1 I O ...

Страница 123: ...2A 62B 69A 69B 73A 73B 80A 80B Line Side T 1 Card Not used T 1 tip receive data T 1 ring receive data T 1 tip transmit data T 1 ring transmit data Alarm out normally open Alarm out common Alarm out normally closed MMI in transmit data MMI in receive data Ground Control 1 Control 2 MMI out receive data MMI out transmit data Ground Control 1 Control 2 11 3 1 9 1 2 3 3 2 5 7 9 2 3 5 7 9 1 26 2 27 3 2...

Страница 124: ...ule you have You can also make this connection at the MDF without using the NT5D13 Line side T1 I O cable by cross connecting according to the pinouts in Table 24 3 Turn over the T1 transmit and receive pairs where required for hardwiring the line side T1 card to local CPE T1 terminal equipment The backplane connector is arranged as an 80 row by 2 column array of pins Table 24 shows the I O pin de...

Страница 125: ...ata 13A 2 T1 Tip Transmit Data 13B 27 T1 Ring Transmit Data 14A 3 Alarm out Normally open 14B 28 Alarm out Common 15A 4 Alarm out Normally closed 15B 29 No Connection 16A 5 No Connection 16B 30 Away from MMI terminal Receive Data 17A 6 Away from MMI terminal Transmit Data 17B 31 Towards MMI terminal Transmit Data 18A 7 Towards MMI terminal Receive Data 18B 32 Daisy chain Control 2 19A 8 Daisy chai...

Страница 126: ...e Data 3 2 T1 Tip Transmit Data 1 27 T1 Ring Transmit Data 9 3 Alarm out common 1 DB9 male to external alarm P3 28 Alarm out normally open 2 4 Alarm out normally closed 3 7 Towards MMI terminal Receive Data 2 DB9 male towards MMI P5 Wired as DCE Data is transmitted on pin 2 RXD and received on pin 3 TXD 31 Towards MMI terminal Transmit Data 3 33 Ground 5 8 Control 1 7 32 Control 2 9 33 Ground 5 DB...

Страница 127: ...T1 link for specified performance criteria and reports on problems detected One of the ways it can report information is through this external alarm connection If connected the line side T1 card s microprocessor activates the external alarm hardware if it detects certain T1 link problems that it has classified as alarm levels 1 or 2 See Man Machine T1 maintenance interface software on page 109 for...

Страница 128: ...to any other card slot the card slots connected together do not need to be consecutive Follow this procedure for connecting two or more line side T1 cards to the MMI terminal 1 Cable the DB9 male connector labeled P5 towards MMI terminal to one of the COM ports on the back of any TTY a PC running a terminal emulation program or a modem 2 Make the connection from the first card to the second card b...

Страница 129: ...or more cards to the MMI 553 6481 No connection LTI card no 1 LTI card no 2 LTI card no 3 Last LTI card in daisy chain MMI terminal IPE module backplane I O panel on rear of IPE module NT5D13 Maintenance Interface Cable typ LTI Tx Rx tip ring Alarm out Toward MMI Away from MMI NT8D81 Tip Ring Cable typ P1 P2 P3 P4 P5 ...

Страница 130: ...ent analog line cards All 24 T1 channels carried by the line side T1 card are individually configured using the Single line Telephone Administration program LD 10 Use Table 26 to determine the correct unit number and the X11 input output guide 553 3001 400 for LD 10 service change instructions The line side T1 card circuitry routes 16 units 0 15 on the motherboard and eight 0 7 units on the daught...

Страница 131: ...d 2 3 Motherboard 3 4 Motherboard 4 5 Motherboard 5 6 Motherboard 6 7 Motherboard 7 8 Motherboard 8 9 Motherboard 9 10 Motherboard 10 11 Motherboard 11 12 Motherboard 12 13 Motherboard 13 14 Motherboard 14 15 Motherboard 15 16 Daughterboard 0 17 Daughterboard 1 18 Daughterboard 2 19 Daughterboard 3 20 Daughterboard 4 21 Daughterboard 5 22 Daughterboard 6 23 Daughterboard 7 24 ...

Страница 132: ...t Terminating calls are incoming to the terminal equipment The line side T1 card does not support battery reversal answer and disconnect supervision on originating calls After you have configured the software you are ready to power up the card and verify the self test results The STATUS LED on the faceplate indicates whether or not the line side T1 card has successfully passed its self test and th...

Страница 133: ...n loss of signal condition and blue alarm condition The alarms are activated in response to pre set thresholds and error durations Descriptions of each of these T1 link alarm conditions instructions on how to set alarm parameters and access alarm reporting can be found in Alarm operation and reporting on page 118 Two levels of alarm severity exist for bit errors and frame slip errors For these con...

Страница 134: ...in descending chronological order The alarms are stamped with the date and time they occurred T1 Performance Counters and Reports The MMI maintains performance error counters for the following T1 conditions errored seconds bursty seconds unavailable seconds framer slip seconds and loss of frame seconds It retains the T1 performance statistics for the current hour and for each hour for the previous...

Страница 135: ... Meridian 1 software plus the two digit address of the card slot that the motherboard occupies For example to login to a card located in shelf 13 card slot 4 you would type L 13 4 CR A space is inserted between the login command L the shelf address and the card slot address The MMI will now prompt you for a password The password is LTILINK and it must be typed in all capital letters After you have...

Страница 136: ... Command sets are entered by entering the first letter of the first command a space and the first letter of the second command or by entering the entire commands Table 27 shows all the possible command sets listed in alphabetical order These commands are also described by subject later in this section ALARM USAGE Alarm Enable Disable CLEAR USAGE Clear Alarm Error counter Log DISPLAY USAGE Display ...

Страница 137: ... counters for the past 24 hours D P Display Performance Displays performance counters for the current hour D S P Display Status Pause Displays carrier status including whether the card is in the alarm state and what alarm level is currently active H or Help Displays the help screen L Login Logs into the MMI terminal when the system has one line side T1 card Q Quit Logs the terminal user out If mul...

Страница 138: ...will then display the date it has registered You can enter a new date or just hit Enter to leave it unchanged The date is entered in the mm dd yy format Alarm parameters The Set Alarm S A command set establishes the parameters by which an alarm is activated and its duration There are three alarm activation levels as described below Alarm Level 0 AL0 consists of activity with an error threshold bel...

Страница 139: ...od for alarm levels 1 and 2 The threshold value indicates the number of bit errors detected per second that is necessary to activate the alarm The T1 link processes at a rate of approximately 1 5 mb s The threshold value can be set between 3 and 9 and can be different for each alarm level Any other value entered will cause the software to display a Parameter Invalid message The threshold number th...

Страница 140: ...arm level 2 only If self clearing alarm indications have been disabled carrier fail line supervision will terminate when the alarm condition has ceased but the alarm contact and faceplate LED will remain active until the alarm is cleared Note A heavy bit error rate can cause 150 bit errors to occur in less than 100 seconds This will cause the alarm to be declared sooner An alarm will not be automa...

Страница 141: ...lly even when the carrier is no longer experiencing any errors The Clear Alarm command will have to be entered manually to restore service promptly To avoid this the duration period should normally be set to 10 seconds Table 29 Set alarm options Option Description AL1 Threshold Sets the allowable bit errors per second from 3 to 9 before alarm level 1 is activated Factory default is 10 6 AL1 Durati...

Страница 142: ...figuration The Display Configuration D C command set displays the various configuration settings established for the line side T1 card Entering the Display Configuration D C command set will cause a screen similar to the following to appear LTI S N 1103 Software Version 1 01 3 03 95 1 50 Alarms Enabled YES Self Clearing Enabled YES Alarm Level 1 threshold value E 7 Threshold duration in seconds 10...

Страница 143: ...al out of frame condition nor blue alarm condition occurs If a repeating device loses signal it will immediately begin sending an unframed all ones signal to the distant end to indicate an alarm condition This condition is called a blue alarm or an alarm indication signal AIS If an AIS is detected for more than two seconds a level 2 alarm will be declared and silence will be sent on all receive ti...

Страница 144: ...still exists the alarm will be declared again Display Alarms A detailed report of the most recent 100 alarms with time and date stamps can be displayed by entering the Display Alarms D A command set into the MMI Entering the Display Alarms D A command set will cause a screen similar to the following to appear The Pause command can be used to display a full screen at a time by entering D A P Clear ...

Страница 145: ...ious 24 hours The performance criteria for which these counts are maintained are as follows Errored seconds one or more CRC 6 errors or one or more out of frame errors in a second Bursty seconds more than one and less than 320 CRC 6 errors in a second Unavailable seconds unavailable state starts with 10 consecutive severely errored seconds and ends with 10 consecutive severely errored seconds excl...

Страница 146: ... occurred since the counter was cleared Reports on these performance counters can be displayed by entering the Display Performance D P or the Display History D H command sets into the MMI Display Performance Entering the Display Performance D P command set will display performance counters for the past hour A screen similar to the following will appear Each column except the error counter indicate...

Страница 147: ...rier T C command set allows you to run tests on the line side T1 card the T1 link or the CPE device The three tests give you the capability to isolate faulty conditions to any one of these three sources See Table 30 for additional information on these three test types After entering the T C command set you will be prompted to enter which of the three tests you wish to initiate The prompt will appe...

Страница 148: ...rify that DS 30A links are disabled since the tests will interfere with calls currently in process During a test if an invalid word is received a failure peg counter is incremented The peg counter saturates at 65 000 counts At the end of the test the Test Results message will indicate how many failures if any occurred during the test Table 30 shows which test to run for the associated equipment Te...

Страница 149: ...f test 1 was not run and test 2 fails the T1 link or the line side T1 card could be defective To isolate the failure to the T1 link tests 1 and 2 must be run in tandem Figure 27 demonstrates how an external loopback is applied to the T1 link Figure 26 MMI Local loopback test Figure 27 MMI External loopback test T 1 link Line side T 1 interface card Customer premise equipment CPE Common Equipment M...

Страница 150: ...ils it indicates that the CPE device is defective If test 2 was not run and test 3 fails the T1 link or the CPE device could be defective To isolate the failure to the CPE device tests 2 and 3 must be run in tandem Figure 28 demonstrates how the signaling is looped back toward the CPE equipment Figure 28 MMI Network loopback test T 1 link Line side T 1 interface card Customer premise equipment CPE...

Страница 151: ...unit VRU equipment T1 compatible turret systems T1 compatible wireless systems Remote 2500 sets through T1 to a channel bank Remote Norstar sites behind Meridian 1 over T1 The line side T1 card is appropriate for any application where both T1 connectivity and line side functionality is required This includes connections to T1 compatible voice response units voice messaging and trading turret used ...

Страница 152: ...ionality the VRU is able to send the call back to the Meridian 1 for further handling The line side T1 card can also be used to provide off premise extensions to remote locations up to 500 miles from the Meridian 1 system In this application the analog telephone functionality is extended over T1 facilities providing a telephone at a remote site with access to 2500 type line functionality Figure 30...

Страница 153: ...ote Norstar system Figure 30 In this case channel banks would not be required provided that the Norstar system is equipped with a T1 interface Note The line side T1 card audio levels must be considered when determining the appropriateness of an application Figure 31 Line side T1 interface connection to Norstar system 553 7596 T1 Norstar T1 T1 LTI Meridian 1 Public network T1 ...

Страница 154: ...Page 130 of 290 NT5D11 Line side T1 Interface Card 553 3001 105 Standard 5 00 June 1999 ...

Страница 155: ...analog line card to the Meridian 1 software Each channel is independently configurable by software control in the Single line Telephone Administration program LD10 The LEI also comes equipped with a Man Machine Interface MMI maintenance program which provides diagnostic information regarding the status of the E1 link Install the NT5D33 version of the LEI in the NT8D37 IPE module and or the NT8D11 ...

Страница 156: ...mphenol connector on the IPE input output I O panel The I O panel connector connects to a E1 line external alarm and an MMI terminal or modem using the NT5D35 or NT5D36 Line side I O cable available from Nortel Networks Faceplate The LEI faceplate is twice as wide as the other standard analog and digital line cards thereby occupying two card slots The LE1 faceplate has four LEDs See Figure 32 IPE ...

Страница 157: ...NT5D33 and NTRB34 Line side E1 Interface Cards Page 133 of 290 Line cards Description Figure 32 NT5D33AB Line side E1 card faceplate YEL ALM MAINT Line side E1 Interface RED ALM NT5D33AB ...

Страница 158: ...ge 134 of 290 NT5D33 and NTRB34 Line side E1 Interface Cards 553 3001 105 Standard 5 00 June 1999 Figure 33 NT5D34AB Line side E1 line card faceplate YEL ALM MAINT Line side E1 Interface RED ALM NT5D34AB ...

Страница 159: ...d both card slots must be disabled The LED will not turn on until both card slots have been disabled The RED ALARM LED indicates whether or not the LEI has detected an alarm condition from the E1 link Alarm conditions include but are not limited to such conditions as not receiving a signal the signal has exceeded bit error thresholds or frame slip thresholds See Man Machine E1 maintenance interfac...

Страница 160: ... bit error thresholds or frame slip thresholds it may send a yellow alarm signal to the LEI depending on whether or not your terminal equipment supports this feature If a yellow alarm signal is detected this LED will light The MAINT LED indicates whether or not the LEI is fully operational because of certain maintenance commands that are issued through the MMI See Man Machine E1 maintenance interf...

Страница 161: ...ge 137 of 290 Line cards Description Functional description Figure 34 shows a block diagram of the major functions contained on the line side E1 card Each of these functions is described on the following pages Figure 34 Line side E1 card block diagram ...

Страница 162: ...e side functionality was to use analog ports and channel bank equipment With the LEI a direct connection is provided between the Meridian 1 and the peripheral equipment No channel bank equipment is required resulting in a more robust and reliable connection When used for connecting to third party applications equipment the LEI offers a number of benefits It is a more cost effective alternative for...

Страница 163: ...ollowing An industry standard CEPT 0 to 655 feet interface DS 30X signaling protocol into FXO A and B channel associated signaling protocol Switch selectable transmission and reception of E1 signaling messages over an E1 link in either loop or ground start mode Switch selectable call processing between the Australian P2 North American Standard or other user configurable schemes Signaling and contr...

Страница 164: ...rol of the E1 line interface enabling disabling of individual units or entire card programming of loop interface control circuits for administration of channel operation maintenance diagnostics interface with the line card circuit converts on off hook and ringer control messages from the DS 30X loop into A B bit manipulations for each time slot in the E1 data stream using channel associated signal...

Страница 165: ...that is primarily used for E1 link performance monitoring and problem diagnosis The MMI provides alarm notification E1 link performance reporting and fault isolation testing The interface is accessed through connections from the I O panel to a terminal or modem Multiple cards up to 64 can be served through one MMI terminal or modem by linking the LEIs via daisy chain The MMI is an optional feature...

Страница 166: ...ower Supply AC or NT6D40 Peripheral Equipment Power Supply DC can supply power to a maximum of eight LEIs Foreign and surge voltage protections In circuit protection against power line crosses or lightning strikes is not provided on the LEI It does however have protection against accidental shorts to 52 V dc analog lines Table 32 Line side E1 card line interface unit electrical characteristics Cha...

Страница 167: ...Environmental specifications Table 34 shows the environmental specifications of the LEI Table 34 Line side E1 card environmental specifications Parameter Specifications Operating temperature normal 15 to 30 C 59 to 86 F ambient Operating temperature short term 10 to 45 C 50 to 113 F ambient Operating humidity normal 20 to 55 RH non condensing Operating humidity short term 20 to 80 RH non condensin...

Страница 168: ...tional Steps 1 5 are explained in this section Step 6 is covered in Man Machine E1 maintenance interface software on page 165 Dip switch settings Begin your installation and configuration of the LEI by selecting the proper dip switch settings for your environment The LEI contains two dip switches each containing eight switch positions They are located in the upper right corner of the motherboard c...

Страница 169: ... R15 C14 R27 T1 K1 K2 K3 R1 R2 C77 C3 U2 U1 C76 D1 D2 D3 R3 R4 C1 C2 RP6 C16 U18 U19 U20 U21 C17 C20 C19 C22 C21 Y1 U22 C18 U23 U9 C10 C9 R12 D4D5 R14 T3 R13 D6D7 U10 U11 C75 U12 U40 U42 U46 C31 C30 RP14 U32 U33 U34 U35 U36 U38 U37 U39 U41 C28 U52 U50 C26 C27 C29 RP10 RP11 RP12 RP13 C40 C38 U53 U51 C39 C74 U54 U55 U74 C58 U68 U69 U70 U71 U72 U73 U43 U44 U45 U56 U57 C72 C33 C32 U58 U59 U76 U75 C73 ...

Страница 170: ...ine side E1 IPE shelves a maximum of 64 LEI cards capable of daisy chaining to a single MMI terminal For clarity and ease it is recommended that this address be set the same as the address of the peripheral controller identifier in overlay 97 for type XPE However this is not mandatory and since the dip switch is limited to 16 this will not always be possible E1 framing The LEI is capable of interf...

Страница 171: ...our cards together to use one MMI terminal or modem Make your selection for this dip switch position based on how many LEIs you are installing MMI Master or Slave This setting is used only if you are daisy chaining your cards to the MMI terminal or modem It determines whether this card is a master or a slave in the daisy chain Select the master setting if there are no LEIs between this card and th...

Страница 172: ...ill be used Characteristic Selection Switch Position Switch Setting Factory Default MMI port speed selection 1200 baud 2400 baud 1 1 ON OFF OFF E1 signaling Ground start Loop start 2 2 ON OFF OFF IPE Shelf address for LEI See Table 37 3 4 5 6 See Table 37 OFF OFF OFF OFF Card type for ringer allocation XTI 19 XMLC 18 7 7 ON OFF OFF E1 signaling See Table 36 8 OFF OFF Table 36 Line side E1 card sig...

Страница 173: ...6 XPEC Address S1 Switch Position 3 S1 Switch Position 4 S1 Switch Position 5 S1 Switch Position 6 00 OFF OFF OFF OFF 01 ON OFF OFF OFF 02 OFF ON OFF OFF 03 ON ON OFF OFF 04 OFF OFF ON OFF 05 ON OFF ON OFF 06 OFF ON ON OFF 07 ON ON ON OFF 08 OFF OFF OFF ON 09 ON OFF OFF ON 10 OFF ON OFF ON 11 ON ON OFF ON 12 OFF OFF ON ON 13 ON OFF ON ON 14 OFF ON ON ON 15 ON ON ON ON ...

Страница 174: ...maintenance interface software on page 165 for details on how to this and the rest of the available MMI commands Characteristic Selection Switch Position Switch Setting Factory Default E1 framing CRC 4 Disabled CRC 4 Enabled 1 1 ON OFF OFF E1 coding AMI HDB3 2 2 ON OFF OFF NOT USED leave ON leave OFF leave OFF 3 4 5 ON OFF OFF ON OFF OFF Line processing on E1 link failure On hook Off hook 6 6 ON O...

Страница 175: ...ly in card slots where Unit 0 of the motherboard card slot appear on the first pair of the 25 pair I O connector If you are installing the LEI into the NT8D11 CE PE or NT8D37 IPE module you must determine which vintage level module you have Certain vintage levels have dedicated 25 pair I O connectors only for card slots 0 4 8 and 12 These vintage levels are cabled with only 16 pairs of wires from ...

Страница 176: ... installing the LEI into an NT8D11 CE PE Module the card slots available depend on what vintage level module you have Table 39 Line side E1 card NT8D11 CE PE Module vintage level port cabling Vintage Level Number of ports cabled to I O panel NT8D11AC 16 ports NT8D11BC 30 ports NT8D11DC 16 ports NT8D11EC 30 ports Table 40 Line side E1 card NT8D37 IPE Module vintage level port cabling Vintage Level ...

Страница 177: ...ll the LEI into one of the restricted card slot pairs you can rewire your IPE module card slot to the I O panel by installing an additional NT8D81 cable from the LEI motherboard slot to the I O panel and re arranging the three backplane connectors for the affected card slots This will permit the connection of the NT5D35AA or NT5D36AA Line side E1 card carrier and maintenance external I O cable at ...

Страница 178: ... available depend on what vintage level module you have Vintage levels cabling 30 ports For modules with vintage levels that cabled 30 ports to the I O panel the LEI can be installed in any pair of card slots 0 15 Vintage levels cabling 16 ports For modules with vintage levels that cabled 16 ports to the I O panel you can install the LEI into the card slot pairs shown in the following card slots L...

Страница 179: ...I to the LTU equipment the MMI terminal or modem optional an external alarm optional and other LEIs for daisy chaining use of the MMI terminal optional The LEI is cabled from its backplane connector through connections from the motherboard circuit card only to the input output I O panel on the rear of the IPE module No cable connections are made from the daughterboard circuit card The connections ...

Страница 180: ... P5 which connects to an MMI terminal or modem and a DB9 female connector P4 which connects to the next LEI s P4 connector for MMI daisy chaining The Tx marking on the adapter at P2 is the LEI output The E1 data stream coming from the network into the LEI connects at the Rx coaxial connector Table 41 shows the pin assignments of the LEI backplane and I O Panel Table 41 Line side E1 card LEI backpl...

Страница 181: ...ne side E1 card Line Side E1 I O cable pinouts Part 1 of 2 I O Panel Connector Pin Lead Designations LEI Connector Pin LEI Cable Connector to External Equipment 1 E1 Tip Receive data 11 DB15 male to E1 P2 LEI is CPE transmit and receive to network 26 E1 Ring Receive data 3 2 E1 Tip Transmit data 1 27 E1 Ring Transmit data 9 3 Alarm out common 1 28 Alarm out normally open 2 DB9 male to external ala...

Страница 182: ... the RJ48 at the Telco demarc the LTU or other E1 carrier equipment The E1 CPE equipment at the distant end will likewise have transmit and receive wired straight from the RJ48 demarc at the distant end of the carrier facility 7 Toward MMI terminal receive data 2 DB9 male toward MMI P5 Wired as DCE Data is transmitted on pin 2 RXD and received on pin 3 TXD 31 Toward MMI terminal transmit data 3 33...

Страница 183: ...de The MMI monitors the E1 link for specified performance criteria and reports on problems detected One of the ways it can report information is through this external alarm connection If connected the LEI s microprocessor will activate the external alarm hardware if it detects certain E1 link problems it has classified as alarm levels 1 or 2 See Man Machine E1 maintenance interface software on pag...

Страница 184: ...shelf and connect to any other card slot connected card slots do not need to be consecutive Follow this procedure for connecting two or more LEIs to the MMI terminal 1 Cable the DB9 male connector labeled P5 toward MMI terminal to one of the COM ports on the back of any TTY a PC running a terminal emulation program or a modem 2 Make the connection from the first card to the second card by plugging...

Страница 185: ...NT5D33 and NTRB34 Line side E1 Interface Cards Page 161 of 290 Line cards Description Figure 36 Line side E1 card connecting two or more cards to the MMI ...

Страница 186: ...of the architecture and many of the features of the Line side E1 card LEI are different from the analog line card the LEI has been designed to emulate an analog line card to the Meridian 1 software Because of this the LEI software configuration is performed the same as for two adjacent analog line cards All 30 E1 channels carried by the LEI are individually configured using the Single line Telepho...

Страница 187: ... card slot 0 and the daughterboard would reside in card slot 1 In order to configure the terminal equipment through the switch software you will need to be able to cross reference the E1 channel number to the corresponding card unit number This mapping is shown in Table 43 Table 43 Card unit number to E1 channel mapping Part 1 of 2 TN E1 Channel Number Motherboard 0 1 Motherboard 1 2 Motherboard 2...

Страница 188: ... CR The LEI treats OSP and ISP for both originating and terminating calls as hook flash disconnect supervision also known as cut off disconnect Originating calls are outgoing from the terminal equipment Terminating calls are incoming to the terminal equipment The LEI does not support battery reversal answer and disconnect supervision on originating calls Daughterboard 0 18 Daughterboard 1 19 Daugh...

Страница 189: ...t follow the pattern described or operates in any other manner such as continually flashing or remaining weakly lit the card should be replaced Man Machine E1 maintenance interface software Description The Man Machine Interface MMI provides E1 link diagnostics and historical information for the LEI system See Installation and Configuration on page 144 for instructions on how to install the cabling...

Страница 190: ...erminal and an entry will be created in the alarm log and printed to the MMI port When the second level of severity is reached alarm level 2 the MMI will perform all functions performed at alarm level 1 and in addition the LEI will enter line conditioning mode In this mode the LEI will send either on hook or off hook signals for all 30 ports to the Meridian 1 depending on how the dip switch for li...

Страница 191: ... be accessed through any TTY PC running a terminal emulation program or modem After installing the MMI terminal and card cables you are ready to configure the MMI For single card installations it is accessed by entering L CR to login For multiple card installations connected in a daisy chain it is accessed by entering L address where the four digit address is a combination of the two digit address...

Страница 192: ... with an explanation of their usage A screen similar to Figure 37 will appear the help screen will also appear by typing H CR or HELP CR Figure 37 HELP H screen ALARM USAGE Alarm Enable Disable CLEAR USAGE Clear Alarm Error counter Log DISPLAY USAGE Display Alarm Status Perform History Pause HELP USAGE Help SET USAGE Set Time Date Alarm Clearing Name Memory Mode Simple TEST USAGE Test Carrier All ...

Страница 193: ...Displays the alarm log which is a list of the 100 most recent alarms with time and date stamps Momentarily stop the scrolling display by typing P Continue scrolling by typing any other key D C P Display Configuration Displays the configuration settings for your LEI s single or multiple card system Display includes each card s serial number MMI firmware version date and time alarm diable enable set...

Страница 194: ...one card may occupy the bus at a given time and all other LEIs will be unable to notify the MMI of alarms until you have logged out S A Set Alarm Sets alarm parameters such as the allowable bit errors per second threshold and alarm duration S C Set Clearing Sets the alarm self clearing function i e enable or disable S D Set Date Sets the date or verifies the current date S M Set Mode Sets the A B ...

Страница 195: ...d to be a satisfactory condition and therefore no alarm will be activated Alarm Level 1 AL1 consists of activity with an error threshold above the AL1 setting but below the AL2 setting that is deemed to be of minor importance In this situation the external alarm hardware will be activated by closing the normally open contact the RED ALARM LED on the faceplate will light and an alarm message will b...

Страница 196: ...for a level 1 alarm Remember that the numbers being represented are negative numbers Since 3 represents 3 and 4 represents 4 4 represents a smaller number than 3 does The duration value is set in seconds and can be set from 1 to 3 600 seconds 1 hour This duration value indicates how long the alarm condition must last before an alarm will be declared Low bit error rates 107 through 109 are restrict...

Страница 197: ...ooner An alarm condition will not be automatically cleared until the system no longer detects the respective bit error threshold during the corresponding duration period For example if AL1 threshold of 6 representing 10 6 is specified and a duration period of 100 seconds is specified an alarm will be activated if more than 200 bit errors occur in any 100 second period As soon as the alarm is activ...

Страница 198: ...an alarm s duration period should normally be set to 10 seconds Table 46 Set alarm options Option Description AL1 Threshold Sets the allowable bit errors per second before alarm level 1 is activated Factory default is 6 AL1 Duration Sets the duration in seconds from 1 to 3 600 seconds that alarm level 1 is activated Factory default is 10 seconds AL2 Threshold Sets the allowable bit errors per seco...

Страница 199: ... Release 2 of the AB vintage introduces this feature When the distant end terminates a call Release 1 of LEI s AB vintage sends a disconnect message to the terminal equipment and waits for the terminal equipment to go idle before going idle itself A NO response see Figure 38 to the S S command configures Release 2 and above boards to operate in this way Release 2 of AB vintage LEIs gives the admin...

Страница 200: ...ed for see Figures 41 and 42 After each value is displayed the user can enter CR to accept the current value enter just the AB bits which will be copied to the CD bits enter a complete ABCD bit pattern or in the case of optional states a N or n can be entered to indicate that the state is not needed Note that in D4 Framing for E1 there are no CD bits so they will be ignored The user will be prompt...

Страница 201: ...LE SEND Current 0000 New 0101 IDLE SEND bits changed to 0101 IDLE RECEIVE Current 0101 New IDLE RECEIVE bits unchanged BLOCKING RECEIVE enabled Y N N BLOCKING RECEIVE is disabled Incoming call RINGER ON SEND Current 0000 New Incoming call RINGER ON SEND bits not changed Incoming call RINGER OFF SEND Current 0101 New 0101 Incoming call RINGER OFF SEND bits not changed Incoming call OFFHOOK RECEIVE ...

Страница 202: ...ered See Table 38 on page 150 Outgoing call SE IZE RECEIVE Current 0001 N ew 111 Error Note enou gh values specified Enter ei ther 2 or 4 values Outgoing call SE IZE RECEIVE Current 0001 N ew 11 Outgoing call SE IZE RECEIVE bits changed to 1 111 Outgoing call SE IZE ACK SEND enabled Y N N Outgoing call SE IZE ACK SEND is disabled Outgoing call DI AL MAKE RECEIVE Current 111 1 New Outgoing call DI ...

Страница 203: ...and recognized the off hook indication sent by the CPE The call is considered fully connected at this point This value is required Incoming call Distant End DISCONNECT SEND This is the value that the LEI will send to indicate that the distant end has released the call This value is required Incoming call CPE DISCONNECT RECEIVE This is the value that the LEI expects to see from the CPE when the cus...

Страница 204: ...re reverting to the idle state If the CPE reverts to a connected state during this time it will be ignored This value is only used when disconnect supervision is available and is needed for the signaling type in use It is used when the distant end initiates the disconnect For loop start cases this value is not used Intercall release guard Time This is the number of milliseconds that the LEI will m...

Страница 205: ...eframe During the reframe time the E1 link will be declared out of frame and silence will be sent on all receive timeslots A loss of signal condition is declared if a full frame 255 bits of consecutive zeros have been detected at the receive inputs If this condition occurs the E1 link will automatically attempt to resynchronize with the distant end If this condition occurs for more than two second...

Страница 206: ...ll be to be sent on the MMI terminal and the LED will continue to indicate alarm conditions Alarm Enable The Alarm Enable A E command does the reverse of the Alarm Disable A D command It enables the external alarm contacts When this command is typed in the MMI will display the message Alarms Enabled In this mode yellow alarms can be sent and the LEI can enter line processing mode Clear Alarm The C...

Страница 207: ...y Status The Display Status D S command displays the current alarm condition of the E1 link as well as the on hook or off hook status of each of the 30 ports of the LEI Entering this command will cause a screen similar to Figure 45 to appear The Pause command can be used to display a full screen at a time by entering D S P If there is more than one screen the MMI will scroll until the screen is fu...

Страница 208: ...ors in a second Severely errored seconds are seconds in which more than 320 CRC 4 BPV errors or one or more out of frames in a second Unavailable seconds are seconds in which unavailable state starts with 10 consecutive severely errored seconds and ends with 10 consecutive non severely errored seconds excluding the final 10 non severely errored seconds Loss of frame seconds are seconds in which lo...

Страница 209: ...or the past hour A screen similar to Figure 46 will appear Figure 46 Display Performance D P screen Each column except the error counter indicates the number of errors in the current hour and is reset to zero every hour on the hour Just before the performance counters are reset to zero the values are put into the history log The error counter indicates the number of errors since the error counter ...

Страница 210: ...to zero by entering the Clear Error C E command The error counter provides a convenient way to determine if the E1 link is performing without errors since it can be cleared and examined at any time Testing The Test Carrier T command allows you to run tests on the LEI the E1 link or the CPE device The three tests are designed to provide you with the capability to isolate faulty conditions to any on...

Страница 211: ...ter entering the test number selection a prompt similar to Figure 49 will appear Figure 49 Test parameters screen Before a test is run be sure to verify that the card is disabled since the tests will interfere with calls currently in process During a test if an invalid word is received this is recorded via a failure peg counter The peg counter has a limit of 65 000 At the end of the test the Test ...

Страница 212: ...lies an external loopback to the E1 link Test data is generated and received by the LEI on all timeslots If test 1 passes but test 2 fails it indicates that the E1 link is defective between the LEI and the external loopback location If test 1 was not run and test 2 fails the E1 link or the LEI could be defective To isolate the failure to the E1 link tests 1 and 2 must be run in tandem Figure 51 de...

Страница 213: ... No test data is generated or received by the LEI If test 2 passes but test 3 fails it indicates that the CPE device is defective If test 2 was not run and test 3 fails the E1 link or the CPE device could be defective To isolate the failure to the CPE device tests 2 and 3 must be run in tandem Figure 52 illustrates how the signaling is looped back toward the CPE equipment Figure 52 MMI Network loo...

Страница 214: ...o channel bank Remote Norstar sites behind Meridian 1 over E1 The LEI is appropriate for any application where both E1 connectivity and line side functionality are required This includes connections to E1 compatible voice response units voice messaging and trading turret used in stock market applications systems see Figure 53 Figure 53 LEI connection to peripheral equipment For example the LEI can...

Страница 215: ...mote site with access to 2500 type line functionality see Figure 54 Audible message waiting indicator can be provided as well Figure 54 LEI in off premise extension application Similarly use the LEI to provide a connection between the Meridian 1 and a remote Norstar system see Figure 55 In this case channel banks would not be required if the Norstar system is equipped with an E1 interface Note Con...

Страница 216: ...Page 192 of 290 NT5D33 and NTRB34 Line side E1 Interface Cards 553 3001 105 Standard 5 00 June 1999 ...

Страница 217: ...uide Physical description CLASS Modem cards are housed in NT8D37 Intelligent Peripheral Equipment IPE Modules or NT8D11 Common Peripheral Equipment CE PE Modules The CLASS modem card circuitry is mounted on a 31 75 cm by 25 40 cm 12 5 in by 10 in double sided printed circuit board The card connects to the backplane through a 160 pin edge connector The faceplate of the CLASS modem card is equipped ...

Страница 218: ... a time where it is stored in the message buffer If the CLASS Modem card receives more bytes than were specified in the initiating message then the additional bytes will be discarded and will not be included in the CND memory buffer Once all of the CND information has been stored in the memory buffer the CLASS Modem card begins transmission when requested by the system software Data is sent one AS...

Страница 219: ...ing for the CLASS modem card Table 48 Time slot mapping Part 1 of 2 XCMC mapping of TNs Modem units on the CLASS Modem card TNs DS30X timeslot 00 01 02 03 00 01 02 03 module 0 00 01 02 03 04 05 06 07 04 05 06 07 04 05 06 07 08 09 10 11 08 09 10 11 module 1 00 01 02 03 12 13 14 15 12 13 14 15 04 05 06 07 16 17 18 19 16 17 18 19 module 2 00 01 02 03 ...

Страница 220: ...105 Standard 5 00 June 1999 20 21 22 23 20 21 22 23 04 05 06 07 24 25 26 27 24 25 26 27 module 3 00 01 02 03 28 29 30 31 28 29 30 31 04 05 06 07 Table 48 Time slot mapping Part 2 of 2 XCMC mapping of TNs Modem units on the CLASS Modem card TNs DS30X timeslot ...

Страница 221: ...ications Table 50 shows the environmental specifications of the card Configuration The NT5D60AA CLASS Modem card has no user configurable jumpers or switches The card derives its address from its position in the backplane and reports that information back to the Meridian 1 CPU via the Cardlan interface Table 49 CLASS modem card data transmission electrical characteristics Characteristics Descripti...

Страница 222: ...equipped with either CNUMB or CNAME packages packages 332 and 333 respectively up to 255 CLASS Modem CMOD units can be configured in LD 13 and 500 2500 sets can be assigned as CLASS sets in LD 10 by assigning them CNUS or CNUA and CNAA class of service See the X11 input output guide for LD 10 and LD 13 service change instructions ...

Страница 223: ...scription Digital line cards are housed in NT8D37 Intelligent Peripheral Equipment IPE Modules up to 16 cards or NT8D11 Common Peripheral Equipment CE PE Modules up to 10 cards The digital line card circuitry is mounted on a 31 75 cm by 25 40 cm 12 5 in by 10 in double sided printed circuit board The card connects to the backplane through a 160 pin edge connector The faceplate of the digital line ...

Страница 224: ...Page 200 of 290 NT8D02 Digital Line Card 553 3001 105 Standard 5 00 June 1999 Figure 56 Digital line card faceplate 553 6160 Dgtl LC NT8D02 Rlse 04 Card lock latch Card lock latch LED ...

Страница 225: ...e over a 2 wire full duplex 512 kHz time compression multiplexed TCM digital link Each digital telephone and associated data terminal is assigned a separate terminal number TN in the system database giving a total of 32 addressable units per card The digital line card supports Nortel Networks Meridian Digital Telephone Figure 57 shows a block diagram of the major functions contained on the digital...

Страница 226: ...DS 30X loop Card LAN link Power supplies Front panel LED Card LAN interface Tip TCM loop interface circuit Digital phone lines Line interface units 0 7 Line interface units 8 15 Ring Tip TCM loop interface circuit Digital phone lines Ring Rx PCM 1 kHz frame sync Card slot address Sanity timer 553 6163 Digital line interface 5 V dc 10 V dc 15 V dc Reg 15 10 10 V dc Address data bus ...

Страница 227: ...eams and transmit those bitstreams as Bi Polar Return to Zero Alternate Mark Inversion BPRZ AMI data to the eight TCM loops They also do the opposite receive eight BPRZ AMI bitstreams from the TCM loops and multiplex them onto the DS 30X Rx channel The two digital line interface circuits together perform the multiplexing and demultiplexing functions for the 16 digital telephone lines The digital l...

Страница 228: ... 15 5 dB at 256 KHz and a maximum DC loop resistance of 210 ohms Card control functions Control functions are provided by a microcontroller and a Card LAN link on the digital line card A sanity timer is provided to automatically reset the card if the microcontroller stops functioning for any reason Microcontroller The digital line card contains a microcontroller that controls the internal operatio...

Страница 229: ... LAN link is described in the section Intelligent peripheral equipment on page 18 Sanity timer The digital line card also contains a sanity timer that resets the microcontroller if program control is lost The microcontroller must service the sanity timer every 1 2 seconds If the timer is not properly serviced it times out and causes the microcontroller to be hardware reset Circuit power The 15 V d...

Страница 230: ...terfaces and Table 52 lists the maximum power consumed by the card Table 51 Digital line card line interface unit electrical characteristics Characteristics Description Units per card 16 voice 16 data Line rate 512 kbps 100 ppm Impedance 100 Loop limits 0 to 1067 m 3500 ft with 24 AWG PVC cable 15 V dc at 80 mA Maximum AC Signal loss 15 5 dB at 256 KHz Maximum DC Loop resistance 210 ohms Transmitt...

Страница 231: ...d The digital line card does however have protection against accidental shorts to 52 V dc analog lines When the card is used to service off premise telephones primary and secondary main distribution frame MDF protection must be installed Details on installing protection devices are given in Off premise line protection on page 48 Off premise telephones served by cable pairs routed through the centr...

Страница 232: ...in the rear of each module for connection with 25 pair cables to the MDF The information in Table 54 is provided as a reference and diagnostic aid at the backplane since the cabling arrangement may vary at the I O panel See Meridian 1 system installation procedures 553 3001 210 for cable pinout information for the I O panel Figure 58 shows a typical cross connection example Table 53 Digital line c...

Страница 233: ...1T 1R 26 1 27 2 Meridian 1 Cross connect Digital telephone connections A MDF Tip Ring Tip Ring Tip Ring Tip Ring W G G W W BR BR W 28 3 29 4 W S S W R BL BL R 4T 4R 5T 5R 2T 2R 3T 3R 30 5 31 6 Tip Ring Note Actual pin numbers may vary depending on the vintage of the card cage and the slot where the card is installed Module I O Panel Connector Part of 25 pair cable Tip Ring Unit 0 Unit 7 Unit 1 Uni...

Страница 234: ...2 Tip 15A Line 3 Ring 15B Line 3 Tip 16A Line 4 Ring 16B Line 4 Tip 17A Line 5 Ring 17B Line 5 Tip 18A Line 6 Ring 18B Line 6 Tip 19A Line 7 Ring 19B Line 7 Tip 62A Line 8 Ring 62B Line 8 Tip 63A Line 9 Ring 63B Line 9 Tip 64A Line 10 Ring 64B Line 10 Tip 65A Line 11 Ring 65B Line 11 Tip 66A Line 12 Ring 66B Line 12 Tip 67A Line 13 Ring 67B Line 13 Tip 68A Line 14 Ring 68B Line 14 Tip 69A Line 15 ...

Страница 235: ...nd jumper blocks are located on this board Jumper and switch settings The NT8D02 Digital Line Card has no user configurable jumpers or switches The card derives its address from its position in the backplane and reports that information back to the Meridian 1 CPU via the LAN Link interface Software service changes Voice and data ports are configured using the Multi line Telephone Administration pr...

Страница 236: ...Page 212 of 290 NT8D02 Digital Line Card 553 3001 105 Standard 5 00 June 1999 Figure 59 Digital line card jumper block and switch locations 553 6161 ...

Страница 237: ...phone equipment The card can also connect a high voltage low current feed to each line to light the message waiting lamp on telephones equipped with the Message Waiting feature This voltage is provided by the NT6D40 Peripheral Equipment Power Supply DC Cards later than vintage NT8D09AK support µ Law and A Law companding and provide a 2 dB transmission profile change The transmission change improve...

Страница 238: ...nect to the card through the MDF See Meridian 1 system installation procedures 553 3001 210 for termination and cross connect information The faceplate of the analog message waiting line card see Figure 60 is equipped with a red light emitting diode LED that lights when the card is disabled When the card is installed the LED remains lit for two to five seconds as a self test runs If the self test ...

Страница 239: ...NT8D09 Analog Message Waiting Line Card Page 215 of 290 Line cards Description Figure 60 Analog message waiting line card faceplate 553 6165 Anlg M WLC NT8D09 Rlse 0x Card lock latch Card lock latch LED ...

Страница 240: ...ringing current zero crossing Signal detection circuits monitor on hook off hook status and switchhook flash detection Four codecs are provided to perform A D and D A conversion of line analog voiceband signals to digital PCM signals Each codec supports four line interface units The following features are common to all units on the card transmission and reception of scan and signaling device SSD s...

Страница 241: ...dc 12 V dc power Ringing 48 V dc battery Rsync XFMR Signaling relays ringing battery reversal Line interface units 0 3 Tip Ring Analog telephone lines Loop current dialpulse detect Message waiting XFMR Signaling relays ringing battery reversal Line interface units 4 7 Tip Ring Analog telephone lines Loop current dialpulse detect Message waiting XFMR Signaling relays ringing battery reversal Line i...

Страница 242: ...al card LAN link to the controller card The microcontroller controls the following reporting to the CE CPU via the card LAN link card identification card type vintage and serial number firmware version self test status programmed configuration status receipt and implementation of card configuration programming of the codecs enabling disabling of individual units or entire card programming of input...

Страница 243: ...V dc for use by the digital logic circuits All other power to the card is used by the line interface circuits The 15 0 V dc input is regulated down to 12 V dc to power the analog circuits The 48 0 V dc input is for telephone set battery Ringing power for telephone sets is 86 Vrms ac at 20 Hz on 48 V dc The Rsync signal is used to switch 20 Hz ringing on and off at the zero current cross over point...

Страница 244: ...essage waiting line card line interface unit electrical characteristics Characteristics Description Impedance 600 Loop limit excluding telephone 1000 at nominal 48 V excluding telephone Leakage resistance 30 000 Ring trip During silent or ringing intervals Ringing voltage 86 V ac Signaling Loop start Supervision Normal battery conditions are continuously applied approximately 44 5 V on ring and 2 ...

Страница 245: ...o the loss at 1 kHz Message channel noise The message channel noise C weighted dBmC on 95 percent of the connections line to line with both ends terminated in 600 ohms does not exceed 20 dBmC Overload level Signal levels exceeding 6 5 dBm applied to the tip and ring cause distortion in speech transmission Table 56 Analog message waiting line card frequency response Frequency Hz Minimum dB Maximum ...

Страница 246: ...nce Idle current Active current Maximum 12 0 V dc 0 36 V dc 48 mA 0 mA 48 mA 8 5 V dc 0 40 V dc 150 mA 8 mA 280 mA 48 0 V dc 2 00 V dc 48 mA 40 mA 688 mA 48 0 V dc 5 00 V dc 0 mA 10 mA 160 mA 86 0 V ac 5 00 V ac 0 mA 10 mA 160 mA 150 0 V dc 3 00 V dc 0 mA 2 mA 32 mA Current required for each line off hook Each active ringing relay requires 10 mA of battery voltage Reflects the current for ringing ...

Страница 247: ...n on page 48 Off premise telephones served by cable pairs routed through the central office or crossing a public right of way can be subject to a requirement for on card protection and MDF protectors may not be acceptable Check local regulations before providing such service Environmental specifications Table 58 lists the environmental specifications for the analog message waiting line card Table ...

Страница 248: ... card at the MDF using a wiring plan similar to that used for trunk cards A typical connection example is shown in Figure 62 and Table 59 shows the I O pin designations at the backplane connector This connector is arranged as an 80 row by 2 column array of pins Normally these pin positions are cabled to 50 pin connectors at the I O panel in the rear of each module for connection with 25 pair cable...

Страница 249: ...Card 0T 0R 1T 1R 26 1 27 2 with messag waiting lamp A MDF Tip Ring Tip Ring Tip Ring Tip Ring 28 3 29 4 4T 4R 5T 5R 2T 2R 3T 3R 30 5 31 6 Tip Ring Note Actual pin numbers may vary depending on the vintage of the card cage and the slot where the card is installed Module I O Panel Connector Part of 25 pair cable Tip Ring Unit 0 Unit 15 Unit 1 Unit 2 Unit 3 W BL BL W W O O W W G G W W BR BR W W S S W...

Страница 250: ... 2 Ring 14B Line 2 Tip 15A Line 3 Ring 15B Line 3 Tip 16A Line 4 Ring 16B Line 4 Tip 17A Line 5 Ring 17B Line 5 Tip 18A Line 6 Ring 18B Line 6 Tip 19A Line 7 Ring 18B Line 7 Tip 62A Line 8 Ring 62B Line 8 Tip 63A Line 9 Ring 63B Line 9 Tip 64A Line 10 Ring 64B Line 10 Tip 65A Line 11 Ring 65B Line 11 Tip 66A Line 12 Ring 66B Line 12 Tip 67A Line 13 Ring 67B Line 13 Tip 68A Line 14 Ring 68B Line 14...

Страница 251: ...The message waiting feature is enabled by entering data into the customer data block using LD 15 See the X11 input output guide 553 3001 400 for LD 10 and LD 15 service change instructions Analog message waiting line cards with a vintage later than NT8D09AK provide a fixed 2 dB transmission profile change in the gain of the D A convertor Table 60 This transmission profile change is used for contro...

Страница 252: ...Page 228 of 290 NT8D09 Analog Message Waiting Line Card 553 3001 105 Standard 5 00 June 1999 Figure 63 Analog message waiting line card jumper block and switch locations 553 6166 ...

Страница 253: ...ard mounts in any peripheral equipment PE slot The line interface and common multiplexing circuitry is mounted on a 31 75 cm by 25 40 cm 12 5 in by 10 in printed circuit board The OPX analog line card connects to the PE backplane through an 80 pin bus system on the backplane In a PE shelf the bus lines feed into seven multi pin connectors that link the line cards to the main distribution frame MDF...

Страница 254: ...age 230 of 290 QPC192 Off Premise Extension OPX Analog Line Card 553 3001 105 Standard 5 00 June 1999 Figure 64 OPX analog line card faceplate QPC192 500LCSP Card lock latch Card lock latch LED 553 6170 ...

Страница 255: ...ace units The OPX analog line card contains four identical and individually configurable line interface units also referred to as circuits Each unit provides 600 or 900 impedance matching and a balancing network in a signal transformer analog hybrid circuit This balancing network also contains circuitry that allows conversion from a 2 wire to a 4 wire transmission path Figure 65 OPX analog line ca...

Страница 256: ... and amplifies the result Each channel contains a codec that performs A D and D A conversion of the line analog voiceband signal to a digital PCM signal The codec also contains a switchable pad for control of transmission loss This pad can be controlled in software and the possible gain settings are shown in Table 61 Multiplex control The multiplex control logic is common to all four channels This...

Страница 257: ...cification Terminal impedance TIMP 600 or 900 ohms Balance impedance BIMP 600 or 900 ohms DC signaling loop length max with five ringers 750 ohm loop excluding resistance of telephone set with nominal battery of 48 V dc DC signaling loop length max with one ringer 1400 ohm loop excluding resistance of telephone set with nominal battery of 48 V dc Battery supply voltage 2 to 52 5 V dc Minimum detec...

Страница 258: ...5 00 June 1999 Power requirements Table 63 shows the maximum current that the QPC192 OPX line card requires from each power supply Table 63 OPX analog line card power requirements Voltage Idle current mA Active current mA 2 5 V 0 5 0 1 0 1 6 V 1 50 140 6 V 1 50 140 48 V 3 1 320 52 V 4 1 85 ...

Страница 259: ...iven in Off premise line protection on page 48 Off premise telephones served by cable pairs routed through the central office or crossing a public right of way can be subject to a requirement for on card protection and MDF protectors may not be acceptable Check local regulations before providing such service Environmental specifications Table 64 lists the environmental specifications for the analo...

Страница 260: ...cross connect to the OPX analog line card at the MDF using a wiring plan similar to that used for trunk cards A typical connection example is shown in Figure 66 and a list of the connections to the analog line card are shown in Table 65 See Meridian 1 system installation procedures 553 3001 210 for complete I O panel information and wire assignments for each tip ring pair Table 65 OPX analog line ...

Страница 261: ... Unit 0 Unit 3 0T 0R 26 1 27 2 Meridian 1 Cross connect OPS or ONS telephone connections A MDF Tip Ring 600Ω connection 900Ω connection 28 3 29 4 Unit 1 1T 1R 30 5 31 6 Tip Ring NC NC NC Note Actual pin numbers may vary depending on the vintage of the card cage and the slot where the card is installed NC Module I O Panel Connector Part of 25 pair cable W BL BL W W O O W W G G W W BR BR W W S S W R...

Страница 262: ...X analog line card are enabled or disabled using the Single line Telephone Administration program LD 10 See the X11 input output guide 553 3001 400 for LD 10 service change instructions Port to port loss configuration The OPX analog line card provides transmission loss switching for control of end to end connection loss Control of such loss is a major element in controlling transmission performanc...

Страница 263: ...QPC192 Off Premise Extension OPX Analog Line Card Page 239 of 290 Line cards Description Figure 67 OPX analog line card jumper block locations 553 6171 ...

Страница 264: ...Page 240 of 290 QPC192 Off Premise Extension OPX Analog Line Card 553 3001 105 Standard 5 00 June 1999 ...

Страница 265: ...pment PE slot The line interface and common multiplexing circuitry is mounted on a 31 75 cm by 25 40 cm 12 5 in by 10 in printed circuit board The basic 500 2500 analog line card connects to the PE backplane through an 80 pin bus system on the backplane In a PE shelf the bus lines feed into seven multi pin connectors that link the line cards to the main distribution frame MDF also called the cross...

Страница 266: ...e 242 of 290 QPC452 Basic 500 2500 Analog Line Card 553 3001 105 Standard 5 00 June 1999 Figure 68 Basic 500 2500 analog line card faceplate 553 6175 500 LC Q P C 4 5 2 Card lock latch Card lock latch LED ...

Страница 267: ...nd signaling data over network loops This interface is discussed in detail in Peripheral equipment on page 6 Figure 69 Basic 500 2500 analog line card block diagram Multiplex control logic Signaling logic Analog hybrid XFMR Signaling Ringing Battery reversal On off hook Codec Foreign voltage protection Tip Ring Network loop Card enable Line address Voice Signal ing Front panel LED Bass pass filter...

Страница 268: ...codec Audio signals received from the telephone line are passed through a low pass monolithic A D filter that limits the frequency spread of the input signal to a nominal 200 3400 Hz bandwidth The audio signal is then applied to the input of the codec Audio signals coming from the codec are passed through a low pass D A monolithic filter that integrates the amplitude modulated pulses coming from t...

Страница 269: ...resistance changes Table 66 Basic 500 2500 analog line card line interface electrical characteristics Characteristic Specification Terminal impedance TIMP 600 ohms Balance impedance BIMP 600 ohms DC signaling loop length max with two ringers 1000 ohm loop excluding resistance of telephone set with nominal battery of 8 V dc Battery supply voltage 42 to 52 5 V dc Minimum detected loop current 20 mA ...

Страница 270: ...g line card maximum number of voice calls recommended Loop Resistance Ohms 17 mA 20 mA up to 40 2 2 41 to 100 2 1 101 to 250 2 1 251 to 1000 1 1 Loop resistance excludes the impedance of the telephone 17 mA 20 mA is the current that a typical telephone requires in an off hook condition Table 68 Basic 500 2500 analog line card power requirements Voltage Idle current mA Active current mA 2 5 V 0 5 0...

Страница 271: ...devices must be installed on the customer s premises These devices must be capable of providing a path to ground from tip and ring for foreign voltages that exceed 600 V peak Environmental specifications Table 69 shows the environmental specifications of the card Table 69 Basic 500 2500 analog line card environmental specifications Parameter Specifications Operating temperature 0 to 60 C 32 to 140...

Страница 272: ...e lines from station equipment cross connect to the basic 500 2500 analog line card at the MDF using a wiring plan similar to that used for trunk cards A list of the connections to the analog line card are shown in Table 70 and a typical connection example is shown in Figure 70 See Meridian 1 system installation procedures 553 3001 210 for complete I O panel information and wire assignments for ea...

Страница 273: ...ine Card Unit 0 Unit 7 0T 0R 26 1 27 2 Meridian 1 Cross connect On premise telephone connections A MDF Unit 1 Unit 2 Unit 3 Tip Ring Tip Ring 28 3 29 4 2T 2R 1T 1R 30 5 31 6 Tip Ring NC NC NC Note Actual pin numbers may vary depending on the vintage of the card cage and the slot where the card is installed Module I O Panel Connector Part of 25 pair cable W BL BL W W O O W W G G W W BR BR W W S S W...

Страница 274: ...d configure the basic 500 2500 line card Figure 71 shows the location of the switches and jumper blocks on this board Jumper strap settings There are no user configurable jumpers or switches on the basic 500 2500 analog line card Software service changes Individual line interface units on the basic 500 2500 analog line card are enabled or disabled using the Single line Telephone Administration pro...

Страница 275: ...QPC452 Basic 500 2500 Analog Line Card Page 251 of 290 Line cards Description Figure 71 Basic 500 2500 analog line card jumper block locations 553 6176 ...

Страница 276: ...Page 252 of 290 QPC452 Basic 500 2500 Analog Line Card 553 3001 105 Standard 5 00 June 1999 ...

Страница 277: ...neous voice and data service over a single twisted pair of standard telephone wiring When a digital telephone is equipped with the data option an asynchronous ASCII terminal or personal computer acting like an asynchronous ASCII terminal can be connected to the system through the digital telephone To use the ISDLC the following requirements must be met Double density peripheral shelves must be equ...

Страница 278: ...of ISDLCs allowed for QSD65 and QSD80 PE shelves One PE shelf houses up to six ISDLCs if the remaining slots are used One PE shelf houses up to eight ISDLCs if the remaining slots are not used One QPC82 Power Converter supports up to 18 ISDLCs provided no other circuit cards require power from this power converter If the QPC82 Power Converter supports other PE cards the following formula defines t...

Страница 279: ...QPC578 Integrated Services Digital Line Card Page 255 of 290 Line cards Description Figure 72 Integrated services digital line card faceplate 553 6180 QPC578 ISDLC Card lock latch Card lock latch LED ...

Страница 280: ...ns are described on the following pages Figure 73 Integrated services digital line card block diagram Multiplex control logic Time compression multiplex digital line interface units Tip Ring Network loop Card enable Line address Voice 553 6183 Time compression multiplex digital line interface units Tip Ring Time compression multiplex digital line interface units Tip Ring Time compression multiplex...

Страница 281: ...ace circuit It also provides battery voltage for the digital telephone set Multiplex control The multiplex control logic is common to all four channels This logic interfaces the individual line circuits to the peripheral bus signaling channel Circuits are provided in the multiplex control logic to retime the digital signals received from the peripheral bus Circuits are also provided to decode the ...

Страница 282: ...ce unit specifications Table 71 provides a technical summary of the ISDLC line interface Table 71 Integrated services digital line card line interface technical summary Characteristics Description Units per card 8 voice data Options None Impedance 100 Line rate 512 kbps 100 ppm Line coding bipolar return to zero alternate mark inversion BPRZ AM Transmitter output voltage successive 1 bits 0 bits 1...

Страница 283: ... in circuit protection against power line crosses or lightning strikes When the card is used to service off premise telephones primary and secondary main distribution frame MDF protection must be installed Details on installing protection devices are given in Off premise line protection on page 48 Off premise telephones served by cable pairs routed through the central office or crossing a public r...

Страница 284: ...specifications Table 73 shows the environmental specifications of the card Table 73 Integrated services digital line card environmental specifications Parameter Specifications Operating temperature 0 to 60 C 32 to 140 F ambient Operating humidity 5 to 95 RH noncondensing Storage temperature 40 to 70 C 40 to 158 F ...

Страница 285: ... lines from station equipment cross connect to the ISD line card at the MDF using a wiring plan similar to that used for trunk cards A typical connection example is shown in Figure 74 and a list of the connections to the ISD line card are shown in Table 74 See Meridian 1 system installation procedures 553 3001 210 for complete I O panel information and wire assignments for each tip ring pair Table...

Страница 286: ...2 Meridian 1 Cross connect Digital telephone sets and terminals or personal computers A MDF Unit 1 1 9 Unit 2 2 10 Unit 3 3 11 Tip Ring RS 232C Terminal or PC Digital telephone set Tip Ring 28 3 29 4 2T 2R 1T 1R 30 5 31 6 Tip Ring NC NC NC Note Actual pin numbers may vary depending on the vintage of the card cage and the slot where the card is installed Module I O Panel Connector Part of 25 pair c...

Страница 287: ...m software to properly recognize and configure the ISD line card Figure 75 shows the location of the jumper blocks on this board Jumper strap settings There are no user configurable jumpers or switches on the ISD line card Software service changes Individual line interface units on the ISD line card are enabled or disabled using the Multi line Administration program LD 11 See the X11 input output ...

Страница 288: ...Page 264 of 290 QPC578 Integrated Services Digital Line Card 553 3001 105 Standard 5 00 June 1999 Figure 75 Integrated services digital line card jumper block locations 553 6181 ...

Страница 289: ...nalog line card mounts in any peripheral equipment PE slot The line interface and common multiplexing circuitry is mounted on a 31 75 cm by 25 40 cm 12 5 in by 10 in printed circuit board The 16 port message waiting analog line card connects to the PE backplane through an 80 pin bus system on the backplane In a PE shelf the bus lines feed into seven multi pin connectors that link the line cards to...

Страница 290: ... 290 QPC789 16 port Message Waiting Analog Line Card 553 3001 105 Standard 5 00 June 1999 Figure 76 16 port message waiting analog line card faceplate 553 6185 QPC789 QDMW Ln Cd Card lock latch Card lock latch LED ...

Страница 291: ... XFMR Signaling Ringing Battery Reversal On Off Hook Message waiting Codec Tip Ring Bass pass filter 553 6188 Multiplex control logic Signaling logic Network loop Card enable Line address Voice Signal ing Front panel LED Analog hybrid XFMR Signaling Ringing Battery Reversal On Off Hook Message waiting Codec Tip Ring Bass pass filter Analog hybrid XFMR Signaling Ringing Battery Reversal On Off Hook...

Страница 292: ...atus of the phone set The two possible conditions are on hook low loop current or off hook high loop current The 2 wire to 4 wire conversion is accomplished using a differential amplifier that converts the input differential signals that are equal and opposite in amplitude into a transmit signal that is referenced to ground The differential amplifier also limits the transmission of any longitudina...

Страница 293: ... three states ON OFF and FLASH The message waiting lamp driver circuit is disabled whenever the phone is in the off hook state The lamp fail detector switches high whenever the lamp is bad open The lamps flash at a rate of 1 Hz When flashing is enabled on all 16 of the lamps the lamp driver circuit is enabled on only 8 of the lamps at any one time The other eight lamps are enabled when the first e...

Страница 294: ...s exceeding 7 dBm applied to the tip and ring cause distortion in speech transmission Table 75 16 port message waiting analog line card line interface unit electrical characteristics Characteristic Specification Terminal impedance TIMP 600 ohms Balance impedance BIMP 600 ohms DC signaling loop length max 1000 ohm loop excluding resistance of telephone set with nominal battery of 48 V dc Battery su...

Страница 295: ...d requires from each power supply Table 76 16 port message waiting analog line card maximum number of ringers per directory number loop Loop resistance Maximum number of ringers NE C4A or equivalent 1000 ohms 2 850 ohms 3 600 ohms 4 350 ohms 4 Table 77 16 port message waiting analog line card power requirements Voltage Active current mA 6 V 1 300 6 V 1 300 48 V 3 550 52 V 4 10 150 V 5 20 ...

Страница 296: ...devices must be installed on the customer s premises These devices must be capable of providing a path to ground from tip and ring for foreign voltages that exceed 600 V peak Environmental specifications Table 78 lists the environmental specifications for the analog message waiting line card Table 78 16 port message waiting analog line card environmental specifications Parameter Specifications Ope...

Страница 297: ...o called the cross connect terminal In an NT8D13 PE Module the backplane connector is cabled to the input output I O panel that is linked to the MDF through 25 pair cables Telephone lines from station equipment cross connect to the 16 port message waiting analog line card at the MDF using a wiring plan similar to that used for trunk cards A typical connection example is shown in Figure 78 and a li...

Страница 298: ...8 Unit 1 Unit 9 Unit 2 Unit10 Unit15 0T 0R 8T 8R 26 1 27 2 Meridian 1 Cross connect Telephone sets with message waiting light A MDF Unit 3 Unit 7 Tip Ring Tip Ring Tip Ring Tip Ring 28 3 29 4 2T 2R 10T 10R 1T 1R 9T 9R 30 5 31 6 Tip Ring Note Actual pin numbers may vary depending on the vintage of the card cage and the slot where the card is installed Module I O Panel Connector Part of 25 pair cabl...

Страница 299: ...Ring 2A Line 2 Tip 3A Line 2 Ring 9A Line 3 Tip 10A Line 3 Ring 36B Line 4 Tip 37B Line 4 Ring 29B Line 5 Tip 30B Line 5 Ring 2B Line 6 Tip 3B Line 6 Ring 9B Line 7 Tip 10B Line 7 Ring 38A Line 8 Tip 39A Line 8 Ring 31A Line 9 Tip 32A Line 9 Ring 4A Line 10 Tip 5A Line 10 Ring 11A Line 11 Tip 12A Line 11 Ring 38B Line 12 Tip 39B Line 12 Ring 31B Line 13 Tip 32B Line 13 Ring 4B Line 14 Tip 5B Line ...

Страница 300: ...o properly recognize and configure the message waiting analog line card Figure 79 shows a drawing of this board Jumper strap settings There are no user configurable jumpers or switches on the message waiting analog line card Software service changes Individual line interface units on the message waiting analog line card are enabled or disabled using the Single line Telephone Administration program...

Страница 301: ...QPC789 16 port Message Waiting Analog Line Card Page 277 of 290 Line cards Description Figure 79 16 port message waiting analog line card jumper block locations 553 6186 ...

Страница 302: ...Page 278 of 290 QPC789 16 port Message Waiting Analog Line Card 553 3001 105 Standard 5 00 June 1999 ...

Страница 303: ... Common equipment and peripheral equipment module CCITT International Telegraph and Telephone Consultive Committee CID Caller Identification CLS Class of service CO Central office COS Class of service CPU Central processor unit DTMF Dual tone multi frequency ICL Inserted connection loss ...

Страница 304: ...work LED Light emitting diode MDF Main Distribution Frame ONP On premise class of service ONS On premises set station OPS Off premises set station OPX Off premise class of service PBX Private branch exchange PCM Pulse code modulation PSTN Public Switched Telephone Network PE Peripheral equipment PSN Public switched network ...

Страница 305: ...escription PSTN Public switched telephone network REN Ringer equivalence numbers RH Relative humidity Rsync Ring synchronization TCN Time compression multiplexed TIMP Termination impedance TN Terminal number WATS Wide Area Transmission Service ...

Страница 306: ...Page 282 of 290 List of terms 553 3001 105 Standard 5 00 June 1999 ...

Страница 307: ...a 32 203 busses card LAN link 21 for DS 30X network loops 20 IPE compared to PE 15 16 C cabling for line cards 14 NT1R20 Off Premise Station OPS Analog Line Card 53 68 NT8D02 Digital Line Card 208 NT8D09 Analog Message Waiting Line Card 214 QPC192 Off Premise Extension OPX Analog Line Card 229 QPC452 Basic 500 2500 Analog Line Card 241 QPC789 16 port Message Waiting Analog Line Card 265 call signa...

Страница 308: ...ration 40 digital line cards 5 7 interface units 32 DLIC digital line interface circuit 32 203 DS 30X loops 16 18 19 21 NT1R20 Off Premise Station OPS Analog Line Card 56 57 NT8D02 Digital Line Card 202 203 NT8D09 Analog Message Waiting Line Card 216 217 219 DS 30Y network loops 17 21 E electrical specifications NT1R20 Off Premise Station OPS Analog Line Card 60 NT5D60AA CLASS Modem card 197 NT8D0...

Страница 309: ...ff Premise Extension OPX Analog Line Card 238 239 QPC452 Basic 500 2500 Analog Line Card 250 251 QPC578 Integrated Services Digital Line Card ISDLC 263 264 QPC789 16 port Message Waiting Analog Line Card 276 277 K key systems line cards for 8 9 10 L LD 10 for configuring interface units 14 65 227 238 250 265 LD 11 for configuring interface units 14 198 211 253 263 LD 15 for configuring interface u...

Страница 310: ... Analog Message Waiting Line Card 217 218 modems line cards for 9 10 with NT8D09 Analog Message Waiting Line Card 213 MSB most significant bit 26 multiplex control QPC192 Off Premise Extension OPX Analog Line Card 232 QPC452 Basic 500 2500 Analog Line Card 244 QPC578 Integrated Services Digital Line Card ISDLC 257 QPC789 16 port Message Waiting Analog Line Card 269 N network equipment circuit card...

Страница 311: ...D09 Analog Message Waiting Line Card configuration jumper and switch settings 227 228 software service changes 227 connector pin assignments 224 225 226 description 7 9 213 214 electrical specifications 220 environmental specifications 223 faceplate 214 215 foreign and surge voltage protection 223 frequency response 221 functions card control 218 card interfaces 216 circuit power 219 codecs 216 21...

Страница 312: ...l Line Card ISDLC 254 257 259 QPC789 16 port Message Waiting Analog Line Card 271 Q QPC192 Off Premise Extension OPX Analog Line Card configuration jumper blocks 238 239 port to port loss 238 software service changes 238 connector pin assignments 236 237 description 7 10 49 51 229 electrical specifications 233 environmental specifications 235 faceplate 230 foreign and surge voltage protection 235 ...

Страница 313: ...op range ringer limitations 271 power requirements 271 QPC789 16 port Message Waiting Line Card description 7 10 R related documentation 1 ringer limitations NT1R20 Off Premise Station OPS Analog Line Card 62 QPC789 16 port Message Waiting Analog Line Card 271 S signaling words 20 SL 1 Network loops 16 17 26 27 28 SLIC subscriber line interface circuit 30 268 269 switches 14 15 T TCM time compress...

Страница 314: ...Page 290 of 290 553 3001 105 Standard 5 00 June 1999 ...

Страница 315: ......

Страница 316: ...dio interference regulations of Industry Canada These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation...

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