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Nortel Meridian 1 Option 11C Compact Technical Reference Manual Download Page 138

Page 127 of 136

Meridian 1 Option 11C Compact

Technical Reference Guide

132

Chapter 13 — NTMW04 1.5 Mb DTI/PRI

Introduction

The NTMW04 is a mini Peripheral Equipment (PE) circuit card that installs 
in any of the upper three peripheral slots in the main cabinet of the 
Meridian 1 Option 11C Compact system. It provides 1.5Mb ISDN Primary 
Rate Interface and Digital Trunk Interface capabilities. The NTMW04 also 
provides Clock recovery (slave configuration) and a D-Channel Handler 
Interface (downloadable).

Functional description

The NTMW04 provides the following features and functions:

•

1.544 Mbps T1 transmission rate

•

D2, D3, D4, and ESF framing formats

•

Line Equalization via software control

•

selection of B7 and B8ZS method of zero code suppression

•

support of the NI-2 TR-1268 interface

•

support of the NX64 feature

•

1.5 Mb Clock recovery, in a slave configuration format

•

support of in band ABCD signaling for DTI applications

•

AMI or B8ZS line coding

•

CE-MUX for D-Channel communication

•

downloadable layer 1 software and DTI software

•

downloadable D-Channel Hardware Interface software

Summary of Contents for Meridian 1 Option 11C Compact

Page 1: ...anges in design or components as progress in engineering and manufacturing may warrant This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules Meridian 1 Option 11C and Compact are trademarks of Nortel Northern Telecom This Nortel documentation is protected by copyright It may not be copied in any form or medium except pu...

Page 2: ...Meridian 1 Option 11C Compact Technical Reference Guide Revision history September 1998 Release 2 0 Standard November 1997 Release 1 0 Standard ...

Page 3: ...553 3121 100 Standard 2 0 September 1998 ...

Page 4: ...heet A Trunk Forecast 3 Worksheet B Line forecast 4 Provisioning conference channels 5 Conference channels 5 Assigning equipment and preparing equipment summary 5 Worksheet C System cabinet requirements 6 List the card slot assignments 7 Worksheet D Card Slot Assignments 9 Chapter 2 Transmission parameters 11 Introduction 11 Transmission 11 Loss Plan 11 Insertion loss limits 17 Input Impedance and...

Page 5: ... 27 Group delay distortion 27 Longitudinal balance 28 Crosstalk 29 Chapter 3 Spares planning 31 Introduction 31 Definitions and assumptions 31 Calculating spares requirements 33 Failure rates 35 NFT values 37 Chapter 4 Power supplies 39 Introduction 39 Features 39 Dimensions and weight 39 Power Supply features 39 Voltage 39 Ringing Generator 40 Power supply LED 40 Under voltage 40 Overvoltage 42 T...

Page 6: ...cription 53 Peripheral equipment requirements 53 General description 54 Physical characteristics 59 Features and options matrix 62 Optional equipment 63 Specifications 68 Environmental and safety considerations 68 Line engineering 68 Local alerting tones 69 Power requirements 70 Meridian Programmable Data Adapter 77 Chapter 8 M2250 Attendant Console 79 Introduction 79 Description 79 Features 79 Ph...

Page 7: ...uirements 102 Foreign and surge voltage protections 102 Overload level 102 Chapter 11 NTMW07 Trunk Line Card 103 Introduction 103 Description 103 Trunk types supported 104 Electrical characteristics 105 Physical characteristics 106 Slot assignments 106 Power Fail Transfer 108 Power requirements 109 Environmental specifications 109 Foreign and surge voltage protection 109 Release control 109 PAD sw...

Page 8: ...ifications 120 Foreign and surge voltage protection 120 Release control 120 PAD switching 120 Application 123 Loop start operation 123 Ground start operation 123 Direct Inward Dial operation 123 Tie Two way Dial Repeating operation 124 Tie Outgoing Automatic Incoming Dial operation 124 Recorded Announcement operation 124 Paging operation 125 Chapter 13 NTMW04 1 5 Mb DTI PRI 127 Introduction 127 Fu...

Page 9: ...TMW50 RS232 Service Module Assembly 133 Introduction 133 Functional description 133 Switch and LED 134 Chapter 15 Fiber optic cable and interfaces 135 Introduction 135 Fiber optic cable interfaces 135 NTDK22 Fiber Expansion daughter board 135 NTMW10 Fiber Receiver card 135 Plastic Fiber Optic cable 136 Environment 136 ...

Page 10: ...is Technical reference guide contains detailed technical information about the Meridian 1 Option 11C Compact system It includes such things as circuit cards information spares planning SDI ports information transmission parameters Meridian modular telephone sets M2250 attendant console ...

Page 11: ...viii About this guide 553 3121 100 Standard 2 0 September 1998 ...

Page 12: ...n This chapter outlines the procedures required to determine equipment requirements Provisioning a new system Provisioning a new system consists of Defining and forecasting growth Calculating number of trunks required Calculating number of lines required Assigning equipment and preparing an equipment summary ...

Page 13: ...ve year growth forecast then an estimate of annual growth is used to estimate the number of trunks and lines required at the two year and five year intervals Calculating number of trunks required Enter the quantity of each type of trunk required in Worksheet A This determines the number of trunk cards required at cutover two year and five year intervals Calculating number of lines required Enter t...

Page 14: ...Worksheet Trunks Cutover 2 years 5 years 2 way 1 way in 1 way out DID Tie CCSA InWATS OutWATS FX Private line Dial dictation Paging RAN AIOD CO Total Divide Total by 4 Number of NTMW07 cards needed Multiply number of NTMW07 by 4 Analog lines available Note Each NTMW07 Trunk Line card is provides four trunk TNs four analog line TNs and one power fail transfer circuit See Chapter 11 NTMW07 Trunk Lin...

Page 15: ...See Note Digital Telephone Line TNs Total Divide total by 24 number of NTMW05 cards needed Note See Chapter 8 M2250 Attendant Console for powering options Analog Telephone Line TNs Quantity at Cutover Quantity in 2 years Quantity in 5 years Analog Telephone line 500 2500 type TNs Total Minus 4 x number of NTMW07 cards in system additional analog TNs needed Divide additional TNs by 16 number of NTM...

Page 16: ...es Therefore the SSC card supports a total of 32 conferees The Fiber Expansion Daughterboard supports an additional conference circuit Therefore a total of 48 conferees are supported when the SSC card is equipped with a Fiber Expansion Daughterboard Assigning equipment and preparing equipment summary Use Worksheet C to record the equipment requirements for the complete system at cutover Assign the...

Page 17: ...e ______________ Prepare one worksheet for the system at cutover 2 year and 5 year intervals PE Card Calculations Worksheet Cutover 2 years 5 years Number of NTMW05 Digital Line cards Number of NTMW06 Analog Line cards Number of NTMW07 Trunk Line cards Number of NTMW04 DTI cards See Note Total Note See Chapter 9 NTMW05 Digital Line Card for information about the DTI card ...

Page 18: ...nments Refer to Figure 1 and Figure 2 for card slot assignments and list them on Worksheet D Figure 1 Card slot assignments in Main Cabinet NTMW11 Power Supply PE Card PE Card PE Card NTMW01 SSC NTMW02 V Mail CPU NTMW05 NTMW06 PE Card PE Card PE Card NTMW04 NTMW05 NTMW06 NTMW07 Main Cabinet 1 2 3 4 5 6 CPU MMail 7 8 9 ...

Page 19: ...dard 2 0 September 1998 Figure 2 Card slot assignments in Expansion Cabinet NTMW11 Power Supply PE Card PE Card PE Card PE Card PE Card PE Card NTMW10 Fiber Receiver NTMW05 NTMW06 NTMW07 NTMW05 NTMW06 Expansion Cabinet 17 18 19 11 12 13 14 15 16 Empty Slot ...

Page 20: ...ompact Technical Reference Guide Worksheet D Card Slot Assignments Main and Expansion Cabinet Card Assignment Main and Expansion Cabinet Card Assignment Slot Number Card Type Slot Number Card Type 1 2 11 12 3 4 13 14 5 6 15 16 7 17 8 18 9 19 10 Mail 20 Not used ...

Page 21: ...Page 10 of 136 Chapter 1 Provisioning 553 3121 100 Standard 2 0 September 1998 ...

Page 22: ...BmO may be used Transmission Loss Plan Insertion loss The insertion loss of a private branch exchange PBX connection is defined as the difference between the power delivered from the test reference source into the input port and the power at the output port For insertion loss tests both the signal source and the measurement instrument have impedances of 600 ohms The test frequency is 1024 Hz The i...

Page 23: ... this reason some connections have asymmetrical loss in order to conform with network loss plans This asymmetry is resolved at a remote point another switch in the overall connection Tables 1 2 and 3 provide loss values measured in decibels dB for connections between PE ports lines and trunks Digital ports PRI or DTI Tables 1 2 and 3 are in matrix format note the direction of the arrows when searc...

Page 24: ...t Technical Reference Guide Table 1 Insertion Loss from PE Ports to PE Ports measured in dB PE Ports PE Ports 500 2500 Line Digital Line 4 Wire ESN E M Trunk CO FX WATS Loop Tie Trunk 500 2500 Line 6 6 Digital Line 2 5 3 5 0 0 CO FX WATS Loop Tie Trunk 2 5 0 0 3 5 0 0 5 0 5 0 5 ...

Page 25: ...o PE Ports measured in dB PE Ports Digital Ports 500 2500 Line Digital Line CO FX WATS Loop Tie Trunk Tie Trunk 8 5 2 5 6 0 2 5 2 5 Satellite Tie Trunk See Note 1 2 5 2 5 3 0 0 5 0 5 CO FX WATS Loop Tie Trunk 0 5 4 5 2 1 0 5 0 5 Toll Office See Note 2 8 5 2 5 6 0 5 5 0 5 Primary Rate Interface PRI See Note 3 6 5 3 5 6 0 2 5 2 5 ...

Page 26: ...ry PBX to a main PBX A tributary PBX does not have its own directory number for incoming calls Note 2 The toll office designation is for a trunk to an office in the public switched network with a higher rank than the local office class 5 Note 3 The 1 5Mb PRI and DTI have digital pads which are controlled by Option 11C Compact software to provide the insertion loss given in Table 2 ...

Page 27: ...in dB Digital ports Digital Ports Tie Trunk Satellite Tie Trunk See Note 1 CO FX WATS Loop Tie Trunk Toll Office Trunk See Note 2 Primary Rate Interface PRI See Note 3 Tie Trunk 0 0 Satellite Tie Trunk See Note 1 0 0 0 0 CO FX WATS Loop Tie Trunk 0 6 0 0 3 3 Toll Office See Note 2 0 0 6 0 6 0 0 0 Primary Rate Interface PRI See Note 3 0 0 6 0 3 0 0 0 0 0 ...

Page 28: ... public switched network with a higher rank than the local office class 5 Note 3 The 1 5Mb PRI and DTI have digital pads which are controlled by Option 11C Compact software to provide the insertion loss given in Table 3 Insertion loss limits Table 4 gives the analog insertion loss limits for trunk and line connections Table 4 Insertion loss limits Connection Insertion Loss Variation Limits dB Line...

Page 29: ...ifference between the loss at the test frequency and the loss at the reference frequency Table 5 gives the frequency response for 2 wire interfaces Table 5 Frequency Response Notes to Table 5 The symbol denotes a loss and the symbol denotes a gain Reference Sources 1024 Hz 10 dBmO 2 Wire Interface Frequency Hz Minimum Maximum 200 0 5 300 0 5 1 0 3000 0 5 1 3200 0 5 1 5 3400 0 3 0 ...

Page 30: ...d ring The Balance Impedance is the output source impedance of the port and is designed to match the impedance of the transmission line plus the far end trunk Table 6 Input impedance balance impedance Connection Input Impedance Balance Impedance 500 2500 Line 600 600 DID DOD LOOP TIE Trunk 600 900 600 3COM 3 COM is the EIA termination of 350 1000 0 21 µ F C O Trunk 600 900 600 3COM 3 COM is the EI...

Page 31: ...incident signal to the power level of the resulting reflected signal Echo Return Loss ERL is a weighted average of the return loss value over the frequency range of 500 to 2500 Hz Single Frequency Return Loss SFRL is the lowest value of return loss in the frequency range of 200 to 3200 Hz The return loss is measured against its characteristic input impedance see Table 7 Reference Source is 0 dBmO ...

Page 32: ...ce line plus telephone set or line plus far end trunk If the source impedance does not match there will be a problem with stability and listener echo The values for the transhybrid return loss of a 2 wire interface when terminated in its balance impedance is given in Table 8 Reference Level is 0 dBmO Table 8 Transhybrid loss Input Frequency Hz Transhybrid Return Loss dB 300 16 500 20 2500 20 3400 ...

Page 33: ...ge The values are shown in Table 9 Table 9 Idle Channel Noise Impulse Noise Impulse noise is defined as noise bursts or spikes that exceed normal peaks of idle channel noise Impulse noise is measured by counting the number of spikes exceeding a pre set threshold it is the number of counts above 55 dBm0 during a five minute interval under fully loaded busy hour PBX traffic conditions Table 10 Impul...

Page 34: ...mO There are two methods of measuring the tracking error Method 1 When a noise signal as defined in CCITT recommendation 0 131 is applied at the input of any interface the gain versus level deviation at the output meets the limits set out in Table 11 Table 11 Variation of gain versus level method 1 Alternatively when a sine wave input in the frequency range 700 1100 Hz is applied at the input of a...

Page 35: ...n the frequency range of 700 1100 Hz applied to the input port of any interface the variation of the gain versus level at the output port meets the limits given in Table 13 Reference frequency 700 1100 Hz 1024 Hz Table 13 Variation of gain versus level method 2 Input Level dBm0 Gain Variation dB 37 to 50 1 0 to 37 0 5 ...

Page 36: ...rtion Method 1 With a noise signal corresponding to CCITT recommendation 0 131 applied to the input interface the total distortion measured at the output interface lies above the limit given in Table 14 Table 14 Total distortion method 1 Method 2 With a sine wave at the reference frequency is applied to the input interface the total distortion measured at the output port interface lies above the l...

Page 37: ...ort the level of spurious out of band image signals measured selectively at the output port is lower than 25 dBmO Discrimination against out of band signals With any sine wave signal above 4 6 kHz applied to the input port at 25 dBm0 the level of any image frequency produced at the output is at least 25 dB below the level of the test signal Intermodulation When two sine wave signals f1 and f2 in t...

Page 38: ...e limits given in Table 16 Table 16 Absolute group delay Group delay distortion The group delay distortion is the difference between the absolute group delay minimum delay and the group delay in the range 500 to 2800 Hz Table 17 Group delay distortion Interface type Absolute Group Delay Microseconds Analog Analog 3000 Analog Digital 2700 Digital Digital 2400 Frequency range Group delay distortion ...

Page 39: ...with respect to ground and measuring the amount of signal noise that is introduced between the tip and ring The equation for calculating longitudinal balance is Longitudinal Balance 20 Log Vs Vm Vs is the disturbing longitudinal voltage and Vm is the tip to ring metallic noise voltage Ideally the metallic noise voltage would be negligible and the longitudinal balance would approach infinity Table ...

Page 40: ...nergy transferred from one voice channel to another The crosstalk coupling loss for every possible type of connections over the frequency range of 200 to 3200 Hz is shown in Table 19 Test Source Frequency 200 3200 Hz 0 dBmO Table 19 Crosstalk Minimum Attenuation Design Objective Connection type dBm0 dBm0 Line Line 65 75 Line Trunk 65 75 Trunk Trunk 65 75 ...

Page 41: ...Page 30 of 136 Chapter 2 Transmission parameters 553 3121 100 Standard 2 0 September 1998 ...

Page 42: ...ilure rate Spares planning is based on the Failure rate of the replaceable part The failure rate is defined as the estimated number of failures for that item during one million 10 6 hours of operation Sparing interval the sparing interval is the period of time that the stock of items should last without being replenished This period is assumed to be one year after the installation of the system St...

Page 43: ...und time from a repair house is estimated to be 10 working days 240 hours See Figure 3 Figure 3 Single depot or repair house service The turnaround time from a centralized depot is estimated to be 2 working days 48 hours See Figure 4 Repair House 1 2 3 4 5 Depots 10 Day Turnaround Time 240 hrs ...

Page 44: ...ock size the spare stock size for a given item depends on the sparing interval stock confidence level failure rate turnaround time for repair and population range Calculating spares requirements The quantity of a replaceable item that is required to stock a depot for one year can be calculated using a formula N x F x T The spares planning formula has the following components N The number of a spar...

Page 45: ...val 1 Determine the number N of the particular item that is being serviced by the depot For example a single depot services 10 000 Universal Trunk Cards 2 Determine the failure rate F for the specified item From the Failure rates listed in Table 20 the failure rate for the Universal Trunk Card is 0 44 3 Determine the turnaround time T in hours Assume a centralized depot with a turnaround time of 4...

Page 46: ...rates for system components NT code Description Failure rate per 10 6 hrs Circuit cards NTMW01 Small System Controller card 1 67 NTMW02 Mail CPU 1 41 NTMW03 4 Port Mail Daughterboard 0 69 NTMW04 DTI PRI card 0 80 NTMW05 Digital Line Card 0 72 NTMW06 Analog Line Card 1 48 NTMW07 Line Trunk Card 0 44 NTMW10 10 m Receiver card 1 21 NTMW11 Power supply 0 94 NTMW12 Analog Line daughterboard 0 48 NTDK21...

Page 47: ... 2 0 September 1998 Telephone sets NTZK06 M2006 telephone 3 08 NTZK08 M2008 telephone 3 10 NTZK16 M2616 telephone 3 88 NTZK22 M2216ACD 1 telephone 4 68 NTZK23 M2216ACD 2 telephone 5 37 NT6G00 M2250 TCM Console N A End NT code Description Failure rate per 10 6 hrs ...

Page 48: ...s required in stock N Number in use F Failure rate T Turnaround time in hours Table 21 Number of spares required NFT values Number of spares 0 0 0010 1 0 0010 0 0452 2 0 0452 0 1890 3 0 189 0 425 4 0 425 0 734 5 0 734 1 090 6 1 09 1 50 7 1 50 1 95 8 1 95 2 43 9 2 43 2 94 10 2 94 3 46 11 3 46 4 01 12 4 01 4 58 13 4 58 5 16 14 5 16 5 76 15 5 76 6 37 16 Continued ...

Page 49: ...00 Standard 2 0 September 1998 6 37 6 99 17 6 99 7 62 18 7 62 8 26 19 8 26 8 91 20 8 91 9 57 21 9 57 10 20 22 10 2 10 90 23 10 9 11 50 24 11 5 12 20 25 12 2 12 90 26 12 9 13 60 27 13 6 14 30 28 14 3 15 00 29 15 0 15 80 30 End NFT values Number of spares ...

Page 50: ...tely 12 5 in 305 mm high 5 in 127 mm wide and 10 in 245 mm deep and weighs approximately 12 lb 5 5 kg Power Supply features The NTMW11 Power Supply has the following features A current limiting circuit which limits the surge of current on the input line when the system is first switched on Generation of a system line transfer signal Differential mode and common mode EMI filtering of input Voltage ...

Page 51: ...he ringing waveform 11 ms for 20 25 Hz Power The output capability is 8VA which is capable of ringing 8CA4 ringers Power supply LED The LED on the power supply faceplate is extinguished when there is a problem with the power supply Under voltage Under voltage to the NTMW11 Power Supply results in partial failure of the Option 11C Compact system The faceplate LED extinguishes Table 22 outlines the ...

Page 52: ...le 22 Nominal and under voltage limits Nominal Under voltage limit Power supply status 5 1V 3 8V Complete Shutdown 8 5V 6 4V Partial failure 150V 100 0V Partial failure 15V 11 2V Partial failure 15V 11 2V Partial failure 48V 36 0V Partial failure Ring Pk V 70V Partial failure 52V 45V Partial failure ...

Page 53: ...2V DC output Manual reset is required The manual reset button is located on the faceplate of the SSC card Temperature sensor The NTMW11 Power Supply is sensitive to the temperature of the cabinet and the system power A thermostat is located at the top of the power supply unit The input breaker trips for temperatures exceeding 175 F 80 C Nominal voltage Overvoltage limit Power supply status 5 1V 6 ...

Page 54: ...under any of the following conditions The SSC card sends a signal to activate PFT A power failure occurs A CPU failure occurs The fiber link to an expansion cabinet fails PFT for that cabinet only The Terminal Numbers TNs that are equipped to perform the PFT function vary depending on the slot assignment in the cabinets When a PFT occurs the following are connected In the Main cabinet When the NTM...

Page 55: ...it 03 connects to the telephone on Card 16 Unit 03 Commercial Power Backup An Un interruptible Power Supply UPS may be connected to the Option 11C Compact system in order to provide a continuous supply of AC power The UPS requirements are based on the following The NTMW11 Power Supply is rated at 750 VA Maximum The Real Power is 460 W Maximum The Power Factor is approximately 0 6 The power up in r...

Page 56: ...ansion interface The NTMW01 SSC card is comprised of the following components and features Flash daughterboard memory DRAM and Backup memory A fiber expansion daughterboard interface One PCMCIA socket Three Serial Data Interface SDI ports 32 channels of Conferencing One Ethernet 10 Mbps interface port 30 channels of tone and digit switch TDS and up to 16 Digitone receivers DTR Networking and Perip...

Page 57: ...ustomer configured data Other system data such as the Secure Storage Area SSA also resides in the Flash drive The SSA holds data that must survive power downs Boot ROM is a 2 Mbyte storage device located on the NTMW01 SSC card s motherboard It is comprised of boot code system data patch data and the backup copy of the Primary Flash drive s customer database The NTMW01 SSC card is equipped with 8 M...

Page 58: ...t settings on the ports are as follows Refer to Chapter 6 SDI ports on page 49 of this guide for more information on the SDI ports Conferencing Thirty two conference channels are provided by the NTMW01 SSC card s conference devices Conference capability can be increased by 16 channels by mounting an NDK22 Expansion daughterboard on the NTMW01 SSC card the maximum number of conference ports is 48 A...

Page 59: ... 100 Standard 2 0 September 1998 Ethernet Interface The NTMW01 SSC card is equipped with a 10 Mbps Ethernet port External connections to the ethernet port is provided by a 15 pin connector located in the main cabinet This is a standard 15 pin AUI interface for a MAU ...

Page 60: ...nication standards SDI ports are found on the NTMW01 SSC card with an additional port located on the Fiber Receiver card in the expansion cabinet Small System Controller SSC card The NTMW01 SSC card is equipped with three SDI ports Each port can be used to connect a modem or terminal to the system If connection to a terminal is required an A0378652 connector adapter NULL modem without hardware han...

Page 61: ...erial Data Interface SDI port Parameter settings Baud rates are selected by setting switches located in the faceplate the Fiber Receiver card The available settings are 150 300 600 1200 2400 4800 9600 and 19200 baud Other RS232 parameters are fixed as shown in Table 25 The port can be used for MTC SCH BUG modes TTY Number Card Port Use Configuration 0 0 0 MTC SCH BUG 1200 8 1 NONE 1 0 1 MTC SCH BU...

Page 62: ...l Reference Guide Connection to external equipment The connection to external devices such as TTYs Modems and so on is achieved through the nine pin SDI connector located in the expansion cabinet It is extended to the external equipment with an NTAK1118 single port SDI cable ...

Page 63: ...Page 52 of 136 Chapter 6 SDI ports 553 3121 100 Standard 2 0 September 1998 ...

Page 64: ... two independent 64 Kb s PCM Channels with associated signaling channels One of the two PCM channels is dedicated to voice while the other is dedicated to data traffic Line cords and handset cords on all Meridian Digital Telephones are equipped with snap in TELADAPT connectors for easy and quick connecting procedures Peripheral equipment requirements The telephone interfaces with the NTMW05 Digita...

Page 65: ...t See Figure 7 on page 57 M2016S a Telephone Security Group Class II approved telephone designed to provide on hook security It is similar to the M2616 with 16 programmable function keys but has no handsfree capability See Figure 7 on page 57 M2216ACD 1 a multi line telephone for ACD operations It has 15 programmable function keys a special ACD Display Module and two RJ 32 jacks for modular electr...

Page 66: ...echnical Reference Guide Figure 5 M2006 modular telephone Dimensions Length 8 42 in 215 mm Width 8 42 in 215 mm Height 3 61 in 93mm Weight approximately 2 lb 1 kg Message Waiting lamp Function keys and LCDs DN Speaker Hold key Rls key Switchook Volume control 553 1850 Brandline insert ...

Page 67: ...er 1998 Figure 6 M2008 modular telephone Dimensions Length 8 42 in 215 mm Width 8 42 in 215 mm Height 3 61 in 93 mm Weight approximately 2 lb 1 kg Speaker Message Waiting lamp Function keys and LCDs Prime DN Rls key Switchook Hold Key Volume control 553 1851 Filler plate Brandline insert ...

Page 68: ...gure 7 M2016S and M2616 modular telephones Dimensions Length 9 75 in 250 mm Width 9 45 in 235 mm Height 3 64 in 93 mm Weight approximately 2 lb 1 kg Speaker Message Waiting lamp 16 Function keys with 8 LCDs Microphone 2616 Prime DN Switchook Rls key Hold key Volume control 553 1852 Filler plate Brandline insert ...

Page 69: ...ber 1998 Figure 8 M2216ACD 1 and 2 modular telephones Dimensions Length 9 75 in 250 mm Width 9 45 in 235 mm Height 3 64 in 93 mm Weight approximately 2 lb 1 kg Message Waiting lamp Function keys and LCDs Speaker Display Volume control Rls key Hold key 553 1853 Prime DN Brandline insert ...

Page 70: ...se key Volume control Message Waiting lamp Speaker Each modular telephone also has a number of programmable keys with LCD indicators that can be assigned to any combination of directory numbers and features only one DN for the M2006 The lower right hand key key 0 is reserved for the Primary DN electret supervisor headset jack carbon agent headset jack electret supervisor headset jack M2216ACD 1 le...

Page 71: ...change removes all secondary DNs LCD indicators support 4 key LCD states Function LCD state idle off active on steady ringing flash 60 Hz hold or feature pending fast flash 120Hz An indicator fast flashes when you have pressed a feature key but have not completed the procedure necessary to activate the feature Volume control One key with two toggle positions controls volume Pressing the right volu...

Page 72: ...ns of a message waiting the red Message Waiting triangle lights and the LCD associated with the Message Waiting key flashes You may assign an Autodial key that dials the message center or voice mail system to avoid the double indication or have no key lamp pair assigned to the message center The Message Waiting lamp is also used to indicate security of the M2016S The red LED triangle lights steadi...

Page 73: ...dsfree LCD lights steadily Features and options matrix Table 26 lists the distinctive characteristics of each Meridian Modular Telephone and shows the optional hardware that you can add to each Table 26 Hardware features and options M2006 M2008 M2016S M2616 M2216ACD 1 M2216ACD 2 Programmable keys 6 8 16 16 16 16 Handsfree microphone standard Optional hardware available Display x x x standard stand...

Page 74: ...d screen contrast using the Program key top right function key You can enable a Call Timer which times calls made or received on the prime DN The Display Module requires a Power Supply Board on M2008 see Power requirements on page 70 There are two types of Display Module available North American Display supports normal business features in two languages English and Quebec French Special Applicatio...

Page 75: ...omes the Program key when Display or MPDA is configured with the telephone The Program key is local to the set and shows blank when you print key assignments in LD20 External Alerter Interface The External Alerter Board provides an interface to standard remote ringing devices such as a ringing unit installed in a location separate from the telephone The External Alerter Interface is not the remote...

Page 76: ...aris GN Netcom Profile NT Liberation The M2216ACD 2 agent jack is compatible with any standard carbon headset The headset interface of the M2216ACD 1 is adjustable to allow you to tune the electrical characteristics to optimize performance while the M2216ACD 2 headset interface is fixed Any recording device connected to the receive path of a Meridian Modular Telephone must meet these requirements ...

Page 77: ...istics Transmit interface 5 V through 10K DC bias resistance with maximum current of 500 micro amps The differential input impedance is 10K ohms Connects to pins 2 and 5 of the handset jack Receive interface single ended output with output impedance of 180 ohms Connects to pins 3 and 4 of the handset jack Figure 10 M2616 with Display Module and Key Expansion Module 553 1857 ...

Page 78: ...7 Meridian Modular Telephones Page 67 of 136 Meridian 1 Option 11C Compact Technical Reference Guide Figure 11 Back of telephone showing Meridian Programmable Data Adapter Flashing LED RS232 interface 553 1897 ...

Page 79: ...r vapor pressure Electromagnetic interference The radiated and conducted electromagnetic interference meets the requirements of Subpart J of Part 15 of the FCC rules for class A computing devices Line engineering The maximum permissible loop length is 3500 ft 915 m assuming 24 AWG 0 5 mm standard twisted wire with no bridge taps A 15 5 dB loss at 256 KHz defines the loop length limit longer length...

Page 80: ... telephone provides four alerting tones and a buzz sound The system controls the ringing cadence by sending tone ON and tone OFF messages to the telephone The alerting tone cadences cannot be changed from the telephone but can be altered for individual Meridian Modular Telephones by software controlled adjustments Alerting tone characteristics The tone frequency combinations are given in Table 27 ...

Page 81: ...rminals Note The loop length limit is defined by a 15 5 dB loss at 256 KHz The Handsfree feature which is integrated into the M2616 requires no additional power Some configurations of telephones and options need more than basic loop power to operate Table 28 lists the Meridian Modular Telephones and shows when additional power is needed to operate the telephone or its optional hardware Power Suppl...

Page 82: ...headset is plugged in When power is restored the carbon jack returns automatically Table 28 Power requirements Power Supply Board The power supply option consists of a Power Supply Board which mounts inside the telephone coupled with an external wall mount transformer or closet power supply which provides power to the Power Supply Board The Power Supply Board receives its power through pins 1 and ...

Page 83: ...plex adapter Refer to Figure 13 on page 74 can provide the additional power needed to operate the telephone and its options 120 V transformer AO367335 or equivalent The following minimum specifications must be met by this transformer Input voltage 120 V AC 60 Hz No load output voltage 29 V AC maximum Voltage at rated current 26 7 V AC minimum Rated load current 700 mA 240 V transformer AO367914 or...

Page 84: ...cal Reference Guide Voltage at rated current 26 7 V AC minimum Rated load current 700 mA Note You cannot wall mount the telephone over the wall jack when using a transformer due to the size of the RJ 11 adapter Mount it above or to the side of the jack and run the line and power cords to it ...

Page 85: ...Page 74 of 136 Chapter 7 Meridian Modular Telephones 553 3121 100 Standard 2 0 September 1998 Figure 13 Configuration of local plug in transformer ...

Page 86: ... be isolated from the input winding and each terminal must be isolated from all other terminal windings A separate winding is required for each terminal and grounds should not be connected Note The QUT1 closet power supply source is not compatible with Meridian Modular Telephones The AC source should be rated at 29 V AC 700 mA isolated The DC source should be rated at 42 V DC 300 mA isolated with ...

Page 87: ...Page 76 of 136 Chapter 7 Meridian Modular Telephones 553 3121 100 Standard 2 0 September 1998 Figure 14 Closet power supply configuration ...

Page 88: ... configuration of data parameters is stored locally although you can set the configuration in the Meridian 1 Option 11C Compact system You cannot set the data parameters in the system before installing the MPDA in the telephone the configuration information will be lost The keyboard dialing routine may vary with the data equipment being used and reference to the user s data terminal manual may be ...

Page 89: ...rs already equipped with a Hayes Smartmodem or users who have a stand alone Hayes Smartmodem can substitute the MPDA for data integration The Hayes dialing feature when used with third party communication software and the digital telephone will support most of the Hayes Smartmodem features Third party terminal emulation packages can also be used with Hayes dialing New features supported by the MPD...

Page 90: ...ures A four line 40 character liquid crystal display LCD with backlighting and adjustable viewing angle Power including backlighting is maintained during building power failures through the system battery backup if equipped In shift mode the M2250 can have up to 20 TGB keys Up to 10 extra flexible feature keys total of 20 in shift mode An optional supporting stand that can be adjusted to nine diff...

Page 91: ...ngle adjustment of the display screen which can be tilted through 90 from horizontal to fully vertical Scrolling control of lines 2 and 3 of the display screen Multi language selection Menus for local console features options menu and diagnostics diagnostics menu Code blue or emergency relay associated with ICI 0 Time and date system download Alert tone volume and frequency selection Electret or c...

Page 92: ...Compact Technical Reference Guide Physical details The attendant console dimensions are as follows Width 16 75 in 425 mm Depth 9 5 in 245 mm Height front 1 in 25 mm Height back 2 5 in 65 mm Height with display screen panel up 4 5 in 115 mm Weight approximately 6 lb 2 75 kg ...

Page 93: ...Page 82 of 136 Chapter 8 M2250 Attendant Console 553 3121 100 Standard 2 0 September 1998 Figure 15 M2250 attendant console top view ...

Page 94: ...e Keyboard layout Refer to Figure 15 on page 82 and Table 30 on page 84 for the location of keys and switches Function keys There are eight function keys on the attendant console located directly below the display screen Refer to Table 30 on page 84 for the positions functions and markings of these keys ...

Page 95: ...History feature is not available with Meridian 1 Option 11C Compact 2 Prime function Position Busy feature Level 1 function normal Night Service feature 3 Function key 1 F1 Prime function normal Selects display screen line 2 for scrolling Level 1 function Shift Selects the Options menu on the display screen 4 Function key 2 F2 Prime function normal Scrolls the currently selected line to the left L...

Page 96: ...line 3 for scrolling Level 1 function Shift Selects the Diagnostics menu on the display screen On the M2250 console the Diagnostics menu is password protected The user must first enter a 4 digit password and press before the Diagnostics menu is displayed 7 Prime function normal Signal Source feature key Level 1 function Shift Used with the Busy Lamp Field Console Graphics Module as CGM key 8 Prime...

Page 97: ...gging in handsets or headsets The jacks are located on both sides of the console beneath the faceplate in the recessed area shown by the arrows The console accepts both carbon and electret headsets and automatically adapts itself to each type Note Electret headsets and handsets are polarity sensitive and must be correctly inserted into the jack LCD indicators The LCD indicators used on the M2250 a...

Page 98: ...as MN MJ C H and CW on line 4 of the display screen panel BUSY and NIGHT are combined with the status of the Release lamp to indicate the console status as shown in Table 31 Table 31 Release lamp indicator status If the emergency power fail transfer feature is activated the console status will be displayed as EMERGENCY QCW type Indicator Status Display screen status line 4 Night Busy Release ON X ...

Page 99: ...r for connection to PC with Monitor Data Port Handset Headset Jacks Handset Headset Jacks Protective plastic cover to be installed when connector is not in use Left Side View Handset Headset jacks same on opposite side Backlighting ON OFF Slider Switch Bottom View Front Edge of Console Handset Headset Jacks Backlighting Slider Switch Power Fail Transfer Switch PFT Knockout for access to J4 connect...

Page 100: ...t plug is orientation dependent and is labeled accordingly The M2250 attendant console is connected to the system through two TNs primary and secondary with two additional TNs for powering Two additional units may be used for long line loop powering The M2250 console requires a Digital Line Card DLC Local console controls The display screen contrast on the attendant console can be adjusted using t...

Page 101: ... the person is away business vacation or illness when the person is due to return and an alternate extension where calls to the person should be directed display a company logo display graphics display text in any one of eight languages have its screen contrast adjusted for easy viewing Installation The BLF CGM mounts on the back of the attendant console and is held on using snapfits and two screw...

Page 102: ...ements The BLF CGM obtains its power through the attendant console An external floating 16 V DC 300 mA power supply transformer A0367601 must be cabled in at the local cross connect terminal at a maximum of 115 ft 35 m from the attendant console when the BLF CGM is installed This provides backlighting for the BLF CGM ...

Page 103: ...Page 92 of 136 Chapter 8 M2250 Attendant Console 553 3121 100 Standard 2 0 September 1998 ...

Page 104: ...synchronous ASCII terminal or personal computer can be connected to the system through the digital telephone Physical The digital line card circuitry is contained on a mini double sided printed circuit board The card connects to the backplane through an edge connector The the faceplate of the card is equipped with a 50 pin connector allowing it to be cabled to the cross connect terminal main distr...

Page 105: ...iated with units 8 through 15 Each unit provides a multiplexed voice and signaling path to and from digital apparatus over a 2 wire full duplex 512 kHz time compression multiplexed TCM digital link The integrated ports include data capabilities The digital line card contains a microprocessor that provides the following functions self identification self test control of card operation status report...

Page 106: ...up to 3500 ft 1070 m using 24 AWG wire with a maximum allowable AC signal loss of 15 5 dB at 256 kHz and a maximum DC loop resistance of 210 ohms 26 AWG wire is limited to 2450 ft 745 m Foreign and surge voltage protections In circuit protection against power line crosses or lightning is not provided on the Digital line card Characteristics Description Units per card 24 voice 8 data Impedance 100 ...

Page 107: ...Page 96 of 136 Chapter 9 NTMW05 Digital Line Card 553 3121 100 Standard 2 0 September 1998 ...

Page 108: ... Port Analog Line Card provides talk battery and signaling for 16 common battery 500 type rotary dial and 2500 type Digitone dial telephones and key telephone equipment It also equipped with the message waiting indicator feature The NTMW06 Analog Line Card interfaces to and is compatible with the equipment listed in Table 33 on page 98 ...

Page 109: ...main distribution frame using 25 pair cable Station apparatus then connects to the card at the cross connect terminal Also located on the faceplate of the NTMW06 Analog Line Card is a red light emitting diode LED which lights when the card is disabled At power up the LED flashes as the analog line card runs a self test If the test completes successfully the card is automatically enabled if it is c...

Page 110: ...smission and reception of scan and signaling device SSD signaling messages over a DS30X signaling channel in A10 format on hook off hook status and switchhook flash detection 20 Hz ringing signal connection and automatic disconnection when the station goes off hook synchronization for connecting and disconnecting the ringing signal to zero crossing of ringing voltage loopback of SSD messages and p...

Page 111: ... analog to PCM and 2 5 dB loss for PCM to analog Frequency response The loss values in Table 34 are measured relative to the loss at 1 kHz Table 34 NTMW06 Analog Line Card frequency response Message channel noise The message channel noise C weighted dBrnC on 95 percent of the connections line to line with both ends terminated in 600 ohms does not exceed 20 dBrnC Table 35 provides a technical summa...

Page 112: ...tance 30 000 ohms 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 5 V on tip at nominal 48 V battery Power input from backplane 48 minimum 42 15 15 8 5 V and ringing voltage also 150 V on analog message waiting line card Insertion loss 6 dB 1 dB at 1020 Hz 3 5...

Page 113: ...ion module must be used Check local regulations before providing such service Overload level Signal levels exceeding 7 dBm applied to the tip and ring cause distortion in speech transmission Voltage Tolerance Idle current Active current Max 12 0 V DC 0 36 V DC 48 mA 0 mA 48 mA 8 0 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 Note 1 320 mA ...

Page 114: ...Line card the NTMW07 is equipped with a Power Fail Transfer PFT feature on one line unit See Power Fail Transfer on page 108 The trunk portion of t he NTMW07 Trunk Line Card has the following features trunk type can be configured on a per unit basis indicates status during an automatic or manual self test provides card identification for auto configuration and to determine the serial number and fi...

Page 115: ...runk types supported The four trunk units on the card support the following types of trunks Central Office CO Foreign Exchange FX and Wide Area Telephone Service WATS Direct Inward Dial DID and Direct Outward Dial DOD Tie Two way Dial Repeating DR and Two way Outgoing Automatic Incoming Dial OAID Paging PAG Note All call zone paging is not supported Recorded Announcement RAN The NTMW07 Trunk Line ...

Page 116: ...erminal impedance 600 or 900 ohm selected by software 600 or 900 ohm selected by software Signaling range 2450 Hz 1700 Hz Signaling type Loop start Ground or loop start Far end battery 42 to 52 5 V 42 to 52 5 V Near end battery N A 42 75 to 52 5 V Minimum loop current N A 20 mA Ground potential difference 3 V 3 V Low DC loop resistance during outpulsing N A 300 ohms High DC loop resistance N A Gro...

Page 117: ...ceplate of the card is equipped with a 50 pin Amphenol type connector for cabling to the cross connect terminal At the cross connect terminal each trunk unit connects to external apparatus such as Central Office facilities or Recorded Announcement equipment Each line unit connects to analog 500 2500 type telephones as described in Chapter 10 NTMW06 Analog Line Card on page 97 Slot assignments The ...

Page 118: ... 4 3 03 00 03 03 Trunk Main 4 04 00 04 03 Line Main 5 6 5 05 00 05 03 Trunk Main 6 06 00 06 03 Line Main 7 7 Main 8 8 Main 9 9 Main 10 Main 11 12 11 11 00 11 03 Trunk NTMW08 Expansion 12 12 00 12 03 Line NTMW08 Expansion 13 14 13 13 00 13 03 Trunk NTMW08 Expansion 14 14 00 14 03 Line NTMW08 Expansion 15 16 15 15 00 15 03 Trunk NTMW08 Expansion 16 16 00 16 03 Line NTMW08 Expansion 17 17 NTMW08 Expa...

Page 119: ...ing on the slot assignment in the cabinets When a PFT occurs the following are connected In the Main cabinet When the NTMW07 card is in slot 1 2 TN 01 03 connects to TN 02 03 Trunk on Card 01 Unit 03 connects to the telephone on Card 02 Unitþ03 When the NTMW07 card is in slot 3 4 TN 03 03 connects to TN 04 03 Trunk on Card 03 Unit 03 connects to the telephone on Card 04 Unitþ03 When the NTMW07 car...

Page 120: ...gn and surge voltage protection The Universal Trunk Card meets CS03 overvoltage power cross specifications Release control Release control establishes which end of a call near far either joint or originating disconnects the call Only incoming trunks in idle ground start configuration can provide disconnect supervision You configure release control for each trunk independently in the Route Data Blo...

Page 121: ...f service determines the operation of the switchable PADs contained in each unit They are assigned as follows Transmission Compensated used for a two wire non VNL trunk facility with a loss of greater than 2 dB for which impedance compensation is provided or used for a four wire non VNL facility Non Transmission Compensated used for a two wire non VNL trunk facility with a loss of less than 2 dB o...

Page 122: ...of 136 Meridian 1 Option 11C Compact Technical Reference Guide Table 42 Insertion Loss from PE Ports to PE Ports measured in dB PE Ports PE Ports 500 2500 Line Digital Line CO FX WATS Loop Tie Trunk CO FX WAT SLoop Tie Trunk 2 5 0 0 3 5 0 5 0 5 ...

Page 123: ...n the form of DTMF tones or dial pulses Ground start operation Ground start operation is configured in software In an idle state the Tip conductor from the CO is open and a high resistance negative battery is present on the Tip of the trunk This biases the Tip ground detector OFF until the CO places ground on the Tip at seizure After the Tip ground is detected the NTMW07 Trunk Line Card scans for ...

Page 124: ...s battery ground pulsing If answer supervision is provided by the far end reverse battery is received which provides a disconnect supervision signal Tie Outgoing Automatic Incoming Dial operation When the trunk is seized by the far end on an incoming call a low resistance loop is placed across the Tip and Ring leads Dial pulses are sent by the far end by interrupting the loop current The trunk is ...

Page 125: ...ging mode the trunk is connected to a customer provided paging amplifier system When the trunk is accessed by dial up or attendant key operation it provides a loop closure across control leads A and B In a typical application this transfers the input of the paging amplifier system to the transmission path of the trunk ...

Page 126: ...manual self test provides card identification for auto configuration and to determine the serial number and firmware level of the card converts transmission signals from analog to digital digital to analog operates in A Law or µ Law companding modes on a per unit basis provides software selected terminating impedance 600 900 or 1200 ohm on a per unit basis 1200 ohm supported for RAN trunks only pr...

Page 127: ...gn Exchange FX and Wide Area Telephone Service WATS Direct Inward Dial DID and Direct Outward Dial DOD Tie Two way Dial Repeating DR and Two way Outgoing Automatic Incoming Dial OAID Paging PAG Note All call zone paging is not supported Recorded Announcement RAN The NTMW44 also supports Music and Direct Inward System Access DISA Table 43 is a matrix of the trunk types and signaling supported by th...

Page 128: ...ance 600 or 900 ohm selected by software 600 or 900 ohm selected by software Signaling range 2450 Hz 1700 Hz Signaling type Loop start Ground or loop start Far end battery 42 to 52 5 V 42 to 52 5 V Near end battery N A 42 75 to 52 5 V Minimum loop current N A 20 mA Ground potential difference 3 V 3 V Low DC loop resistance during outpulsing N A 300 ohms High DC loop resistance N A Ground start equ...

Page 129: ...fails the LED remains lit The LED will also remain lit if one or more units on the card become disabled after the card is operating Each unit on the card connects to the backplane through an edge connector The faceplate of the card is equipped with a 50 pin Amphenol type connector for cabling to the cross connect terminal At the cross connect terminal each trunk unit connects to external apparatus...

Page 130: ...Slot Card Assignment First TN Last TN Type of Unit Cabinet 1 2 1 01 00 01 03 Trunk Main 3 4 3 03 00 03 03 Trunk Main 5 6 5 05 00 05 03 Trunk Main 7 7 07 00 07 03 Main 8 8 08 00 08 03 Main 9 9 09 00 09 03 Main 11 12 11 11 00 11 03 Trunk NTMW08 Expansion 13 14 13 13 00 13 03 Trunk NTMW08 Expansion 15 16 15 15 00 15 03 Trunk NTMW08 Expansion 17 17 17 00 17 03 NTMW08 Expansion 18 18 18 00 18 03 NTMW08...

Page 131: ...g disconnects the call Only incoming trunks in idle ground start configuration can provide disconnect supervision You configure release control for each trunk independently in the Route Data Block LD 16 PAD switching The transmission properties of each trunk are characterized by the class of service COS assigned in the Trunk Data Block LD 14 Transmission properties may be via net loss VNL or non v...

Page 132: ...assigned as follows Transmission Compensated used for a two wire non VNL trunk facility with a loss of greater than 2 dB for which impedance compensation is provided or used for a four wire non VNL facility Non Transmission Compensated used for a two wire non VNL trunk facility with a loss of less than 2 dB or used when impedance compensation is not provided Table 48 shows PAD settings and the res...

Page 133: ...ersal Trunk Card 553 3121 100 Standard 2 0 September 1998 Table 48 Insertion Loss from PE Ports to PE Ports measured in dB PE Ports PE Ports 500 2500 Line Digital Line CO FX WATS Loop Tie Trunk CO FX WAT SLoop Tie Trunk 2 5 0 0 3 5 0 5 0 5 ...

Page 134: ... applied from the system in the form of DTMF tones or dial pulses Ground start operation Ground start operation is configured in software In an idle state the Tip conductor from the CO is open and a high resistance negative battery is present on the Tip of the trunk This biases the Tip ground detector OFF until the CO places ground on the Tip at seizure After the Tip ground is detected the NTMW44 ...

Page 135: ...ial pulses battery ground pulsing If answer supervision is provided by the far end reverse battery is received which provides a disconnect supervision signal Tie Outgoing Automatic Incoming Dial operation When the trunk is seized by the far end on an incoming call a low resistance loop is placed across the Tip and Ring leads Dial pulses are sent by the far end by interrupting the loop current The ...

Page 136: ... In the Paging mode the trunk is connected to a customer provided paging amplifier system When the trunk is accessed by dial up or attendant key operation it provides a loop closure across control leads A and B In a typical application this transfers the input of the paging amplifier system to the transmission path of the trunk ...

Page 137: ...Page 126 of 136 Chapter 12 NTMW44 Universal Trunk Card 553 3121 100 Standard 2 0 September 1998 ...

Page 138: ... configuration and a D Channel Handler Interface downloadable Functional description The NTMW04 provides the following features and functions 1 544 Mbps T1 transmission rate D2 D3 D4 and ESF framing formats Line Equalization via software control selection of B7 and B8ZS method of zero code suppression support of the NI 2 TR 1268 interface support of the NX64 feature 1 5 Mb Clock recovery in a slav...

Page 139: ...and generation Uniform Delay on all time slots in Nx64 formats Physical description LEDs The NTMW04 has eight faceplate LEDs The first six LEDs are associated with the NTMW04 card itself and the remaining two LEDs are associated with the clock controller and DCHI daughterboards In general the first six LEDs operate as follows During system power up the LEDs are on When the self test is in progress...

Page 140: ...nition DIS On Red The NTMW04 circuit card is disabled Off The NTMW04 is not in a disabled state ACT On Green The NTMW04 circuit card is in an active state No alarm states exist the card is not disabled nor is it in a loopback state Off An alarm state or loopback state exists or the card has been disabled See the other faceplate LEDs for more information RED On Red A red alarm state has been detect...

Page 141: ... carrier cable A0681162 The A0681162 is 20 feet long The NT8D97AX a fifty foot extension is also available if required Digital pad The digital pad is an EPROM whose address input to data output transfer function meets the characteristics of a digital attenuator The digital pad accommodates both u255 law and A law coding There are 32 combinations see Table 50 each for u255 to u255 u255 to A law A l...

Page 142: ...ck controller interface The purpose of the clock controller interface is to provide the recovered clock from the external digital facility to the CPU pack Depending on the equipped state of the clock controller the clock controller interface enables or tri states the reference clock source in conjunction with software Offset PAD set 0 PAD set 1 0 0dB 7db 1 2dB 8db 2 3dB 9db 3 4dB 10db 4 5dB 0 6db ...

Page 143: ...ings The T1 Transmit Equalization is set in LD 17 using the T1TE prompt It can be set in four different modes 0 1 2 3 as shown in Table 51 Refer to the Meridian 1 Option 11C Compact 1 5Mb DTI PRI Guide for further details Table 51 Transmit Equalization Settings LD 17 Primary Reference Clock card setting The Primary Reference Clock card is set in LD 73 using the PREF prompt Refer to the Meridian 1 ...

Page 144: ... NTMW50 provides the following features and functions Drivers and receivers buffer the RS232 signals coming from the Option 11C Compact Mail Card A switch on the NTMW50 provides a bypass to the Compact Mail card allowing the PMS to continue to operate even in the case of a Mail card failure or power down Port 2 supports the Guest Administration Computer GAC Port 3 supports the PMS Port 4 connects ...

Page 145: ...ith an LED status indicator The BYPASS switch provides a backup link between the PMS and the Option 11C Compact to be used if the Compact Mail card fails or is powered down for any reason The BYPASS switch allows the PMS to continue to function during a failure The green LED indicator is on when the RSM is operating normally and is off when the BYPASS switch is turned on ...

Page 146: ...ts of an NTDK22 Fiber Expansion daughter board and an NTMW10 Fiber Receiver card mounted in the expansion cabinet NTDK22 Fiber Expansion daughter board The NTDK22 Fiber Expansion daughter board mounts on the NTMW01 SSC card allowing the connection of an A0632902 Plastic Fiber Optic cable to an expansion cabinet up to 33 ft 10 m from the main cabinet Note The A0632902 Plastic Fiber Optic cable is t...

Page 147: ...DK22 Daughter Board in the main cabinet and to the NTMW10 Fiber Receiver card in the expansion cabinet This cable which is the only cable that can be used for this purpose cannot be cut or altered Environment The Daughter Boards and Receiver cards are subject to the environmental conditions shown in Table 52 Table 52 Environmental conditions Operating Storage Ambient temperature 0 C to 50 C 32 F t...

Page 148: ...ange without notice Nortel reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules Meridian 1 Option 11C and Compact are trademarks of Nortel Northern Telecom Publication number 553 3121 100 Document release...

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