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Paradyne Comsphere 3551, User Manual

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Installing the Model 3550 DSU

2-3

3550-A2-GB20-40

July 1999

496-14457-01

SWITCH 1

HINGE TAB

LOCATIONS

FRONT BEZEL

COMSPHERE

 3550

SNAP
TABS

Figure 2-1. Model 3550 Hardware Switch Location (shown without a TDM/Flex)

Table 2-1

Model 3550 DSU Switch Settings

Switch Position

Switch Setting

Function

S1-1

ON

(default)

Permissive V.32 DBM transmit output level of –9 dBm

S1-1

Off

Programmable V.32 DBM transmit level between –12 dBm and 0 dBm

ON

Frame ground (FG) connected to signal ground (SG)

S1-2

Off

(default)

FG connected to SG through 100 ohm resistor

ON is to the rear as you face the front of the DSU.
Off is to the front.

Summary of Contents for Comsphere 3551

Page 1: ...COMSPHERE 3550 SERIES DATA SERVICE UNITS MODELS 3550 AND 3551 USER S GUIDE Document No 3550 A2 GB20 40 July 1999 ...

Page 2: ...suggestions about this document Please mail them to Technical Publications Paradyne Corporation 8545 126th Ave N Largo FL 33773 or send e mail to userdoc paradyne com Include the number and title of this document in your correspondence Please include your name and phone number if you are willing to provide additional clarification Trademarks All products and services mentioned herein are the trade...

Page 3: ...service personnel 6 General purpose cables are provided with this product Special cables which may be required by the regulatory inspection authority for the installation site are the responsibility of the customer 7 When installed in the final configuration the product must comply with the applicable Safety Standards and regulatory requirements of the country in which it is installed If necessary...

Page 4: ...COMSPHERE 3550 Series Data Service Units C July 1999 3550 A2 GB20 40 Notices ...

Page 5: ...ify you in advance But if advance notice is not practical you will be notified as soon as possible You will be advised of your right to file a complaint with the FCC If your DSU causes harm to the telephone network the telephone company may discontinue your service temporarily If possible they will notify you in advance But if advance notice is not practical you will be notified as soon as possibl...

Page 6: ...f data lines you require Refer to the Technical Specifications section of Chapter 1 for V 32 DBM jack information After the telephone company has installed the requested jack you can connect the DSU with the appropriate cable provided An FCC compliant telephone cord and modular plug is provided with this equipment This equipment is designed to be connected to the telephone network or premises wiri...

Page 7: ... Model 3550 DSU Overview 2 1 Before You Begin 2 1 How to Change Hardware Straps 2 2 Where to Place the DSU 2 4 Installing the DSU 2 4 Connecting to the Network 2 5 Addressing the Unit 2 8 Connecting the DSU to a DTE 2 10 Verifying Operation and Testing Connections 2 11 3 Installing the Model 3551 DSU Overview 3 1 Before You Begin 3 2 How to Change Hardware Straps 3 2 Installing the DSU 3 5 Connect...

Page 8: ... Branch 4 9 Configuration Branch 4 12 Control Branch 4 19 Messages Branch 4 20 5 Configuring the Unit Overview 5 1 Using the DCP to Set Configuration Options 5 2 Configuration Option Tables 5 5 Appendix A DSU Menu A 1 B Configuration Worksheets B 1 C Status Indicators and Control Panel Messages C 1 D Pin Assignments D 1 E Application Configurations E 1 F Equipment List F 1 Glossary Index ...

Page 9: ... Rear View 3 5 3 3 Model 3551 DSU Installation and Circuit Pack Lock 3 6 3 4 Model DSU V 35 Adapter Plug Installation 3 7 3 5 Addressing Example 3 10 4 1 Model 3550 Diagnostic Control Panel 4 2 4 2 SDCP and Model 3551 DSU Faceplate 4 3 4 3 Loopbacks 4 9 D 1 Digital Network Connector D 1 D 2 3600 Hubbing Device 3600 F3 300 D 2 D 3 Model 3551 DSU 25 Pin EIA 232 25 Pin V 35 Rear Connector Plate 3000 ...

Page 10: ...sults 4 11 4 5 Bit Error Rate Test Results 4 12 4 6 Directory Entry and Password Characters 4 18 4 7 Lead States 4 20 5 1 DSU Configuration Options 5 6 5 2 Diagnostic DSU Configuration Options 5 8 5 3 Diagnostic DBM Configuration Options 5 9 5 4 Diagnostic External DBU Configuration Options 5 10 5 5 Diagnostic General Configuration Options 5 10 5 6 DBM Configuration Options 5 12 5 7 External DBU C...

Page 11: ...Messages C 8 C 7 Dial Backup Progress Messages C 8 C 8 Command Error Messages C 9 C 9 Dial Backup Error Messages C 10 C 10 TDM Flex Error Messages C 11 D 1 Model 3550 Digital DDS Network Connector Pin Assignments D 2 D 2 Model 3550 Dial Analog Network Connector Pin Assignments D 2 D 3 3600 Hubbing Device Pin Assignments D 3 D 4 3600 Hubbing Device CC IN DC OUT Jack Pin Assignments D 3 D 5 EIA 232 ...

Page 12: ...COMSPHERE 3550 Series Data Service Units vi July 1999 3550 A2 GB20 40 ...

Page 13: ...pendices as needed Chapter 1 Provides a general overview of the DSU and its options information about equipment upgrades and conversions and the unit s technical specifications It also includes equipment warranty information and equipment return instructions Chapter 2 Provides step by step instructions for installing your standalone Model 3550 DSU Chapter 3 Provides step by step instructions for i...

Page 14: ...eries Network Management System User s Guide Call your sales representative to order additional product documentation Paradyne documents are also available on the World Wide Web at www paradyne com Select Library Technical Manuals Reference Documents AT T Technical Reference 41458 AT T Technical Reference 61330 AT T Technical Reference 62310 1987 Bell Canada DCTE Specifications Bell Communications...

Page 15: ...igital data service DDS network Two DTE connectors interfaces are provided for Port 1 EIA 232 D and V 35 Use the EIA 232 D connector for data rates up to and including 19 2 kbps use the V 35 connector for higher rates Rate Adaption With this feature the DSU can adapt its data rate to a low speed application while operating over the high speed DDS circuit LADS operation The DSU can operate as a loc...

Page 16: ...r s Guide These are identified in the Related Documents section of the Preface which also provides information on how to order these documents Optional Features The Model 3550 DSU can be ordered with the following optional features V 32bis 14 4 kbps Dial Backup Module DBM Time Division Multiplexer TDM Flex The Model 3551 DSU can be ordered with a V 32bis 14 4 kbps DBM or it can be used with an ext...

Page 17: ... sharing group operate at the same speed and all receive the same data When configured for DSD digital sharing device port contention only one port at a time is allowed to send Elastic store per port A transmit elastic store buffer is provided for each port for the support of extended circuits Both digital and analog extensions are supported Switched carrier emulation In 2 port TDM Flex transmissi...

Page 18: ...3 amp 5 8 watts at 115 Vac 24 Vac CT 60 HZ 3 0 115 amp 9 5 watts at 115 Vac 24 Vac CT 60 Hz 3 0 103 amp 8 6 watts at 115 Vac 24 Vac CT 60 Hz 3 0 029 amp 4 5 watts at 115 Vac 24 Vac CT 60 Hz 3 0 080 amp 8 0 watts at 115 Vac 24 Vac CT 60 Hz 3 0 024 amp 2 0 watts at 115 Vac 90 132 Vac 60 Hz 3 1 650 amp 165 watts at 115 Vac DTE INTERFACE 3550 DSU 25 pin D subminiature connector 34 pin connector 3551 D...

Page 19: ...tu hr 29 00 Btu hr 29 21 Btu hr 22 16 Btu hr 27 30 Btu hr 563 00 Btu hr PORT RATES Async or Sync rates 64 56 48 19 2 14 4 12 0 9 6 4 8 2 4 and 1 2 kbps Other asynchronous rates e g 150 300 600 and 1800 bps can be obtained through oversampling Asynchronous rates support ITU T V 14 extended rate range at 8 to 12 bits per character including the start and stop bit 2 3 2 5 percent overspeed underspeed...

Page 20: ...bps 4 bps 19 2 kbps 5 bps 9 6 kbps 1 bps 4 8 kbps 0 bps 2 4 kbps 0 bps DDS NETWORK INTERFACE 3550 DSU 3551 DSU 8 pin modular jack USOC RJ48S One or two 50 pin connector USOC RJ48T DIAGNOSTIC INTERFACE 3550 DSU 3551 DSU Requires 3600 Series Hubbing Device which provides two 8 pin modular jacks Via the SDU in the COMSPHEREr 3000 Series Carrier NETWORK COMPATIBILITY AT T Technical Reference 62310 198...

Page 21: ... is set for Callback or Password security then the device is compatible with a Model 3550 or 3551 V 32 DBM If Call Setup is set for Alarm or None then any V 32 modem can be used Also V 22bis at 2 4 kbps can be used APPROVALS DOC Certification PSTN Load Number 230 3684 A 7 RECEIVE VF INTERFACE Dynamic Range V 32 2 wire PSTN Impedance 43 to 10 dBm 600 Ω SWITCHED NETWORK INTERFACE 3550 DSU 3551 DSU 6...

Page 22: ...E 3550 DSU 2 port TDM Flex Provides an additional 25 pin D subminiature connector for a total of two EIA 232 or V 35 interfaces NMS SUPPORT TDM Flex capability is fully supported by Release 4 0 or greater COMSPHERE 6700 Series NMS Equipment Warranty and Support Contact your sales or service representative directly for any help needed For additional information concerning warranty sales service rep...

Page 23: ...ather than V 35 operation Refer to the MUX Port option set tables in Chapter 5 to change this configuration on a port by port basis Installation consists of the following steps which should be performed in the order listed Physical installation Hardware straps Electrical connection Network diagnostic connection Software configuration DDS network or LADS connection Dial or PSTN network connection i...

Page 24: ... a DBM a dial interface cable should have been ordered Permissive RJ11C a 6 pin modular plug at each end Feature Number 4400 F1 53x or 3600 F3 503 Programmable RJ45S an 8 pin modular plug at each end Feature Number 4400 F1 54x Contact your service representative if any of these items is missing from the shipping container or to order the appropriate dial interface cable If your DSU is equipped wit...

Page 25: ... a TDM Flex Table 2 1 Model 3550 DSU Switch Settings Switch Position Switch Setting Function S1 1 ON default Permissive V 32 DBM transmit output level of 9 dBm S1 1 Off Programmable V 32 DBM transmit level between 12 dBm and 0 dBm ON Frame ground FG connected to signal ground SG S1 2 Off default FG connected to SG through 100 ohm resistor ON is to the rear as you face the front of the DSU Off is t...

Page 26: ... exceed 2500 picofarads as specified in EIA 232 D For the V 35 connector the maximum distance recommended between the DSU and the DTE is nominally 1000 feet Allow 1 to 2 feet of clearance around the DSU for access and cable connections during installation Installing the DSU Before installing the DSU label the circuit breaker that protects the ac wall outlet and make sure that it is set to ON Then ...

Page 27: ...tion branch into view 4 Press the function key directly below Confg 5 Press the F1 key to select Opts Configuration Options The Load from screen appears 6 Press the key to bring the factory loaded unit configurations into view and select the appropriate configuration PTPC for a point to point control PTPT for a point to point tributary MPTC for a multipoint control MPTT for a multipoint tributary ...

Page 28: ... documentation to control and configure the DSU from the NMS 496 14576a NMS NETWORK CONNECTION CC DC HUBBING DEVICE LOW VOLTAGE AC POWER IN TO NMS 873A 30 00 HU BB ING DE VICE MOD EL 3 00 0 F3 300 Figure 2 3 Model 3550 DSU NMS Connection Connecting to the Dial or PSTN Network If your DSU is equipped with a V 32 DBM refer to Figure 2 4 as you follow these steps Procedure 1 Plug either end of the di...

Page 29: ...re 1 Plug the DDS network interface cable into the DSU jack labeled LINE U S select either end of the cable Canada select the 8 pin end 2 Plug the other end of the cable into the modular jack USOC RJ48S provided by the circuit provider If the remote DSU is also connected to the network the DSU s green OK indicator lights and the Alrm indicator goes off The Health and Status screen no longer displa...

Page 30: ... must be assigned to each control and tributary DSU in your network You can assign an address within the range of 1 through 255 NOTE Do not assign the number 192 as a network address This number is reserved as a broadcast address If a DBM is installed it requires a separate address which is automatically assigned by the DSU The address assigned a DBM is the DSU s address plus 1 e g if the DSU s ad...

Page 31: ...ary by specifying the tributary s address The 6700 Series NMS accesses the DSU via its network address To access a tributary DSU the NMS first addresses the control then the tributary An address issued from the NMS takes the format of control channel control network address tributary network address This is called link level network addressing Figure 2 6 shows an example of DSU and DBM addressing ...

Page 32: ...illustrates cabling for an EIA 232 application the DSU with TDM Flex illustrates cabling for V 35 applications Refer to this figure as you connect your DSU to the data terminal equipment DTE Be sure to select the appropriate cable EIA 232 or V 35 for your application Procedure 1 Connect the plug end of the DTE cable to Port 1 either the EIA 232 D or the V 35 connector Figure 2 7 shows Port 1 using...

Page 33: ...cess the DSU s identity ID subbranch for each tributary DSU to ensure that the DSUs are properly addressed Refer to Chapter 5 for an example using the DCP if needed Procedure 1 Select Remot Remote branch 2 Enter the tributary s network address 3 Select Stat Status branch 4 Press the key until ID appears 5 Select ID 6 Press the key until Network Addr appears 7 Verify that the correct address has be...

Page 34: ...ear 5 Select DrBU to drop the backup call 6 Perform a Digital Test on the DBM Follow the Verifying the Network procedure selecting DBM instead of DSU Step 2 Verifying TDM Flex Operation If a TDM Flex is installed perform a Digital Test on each port Other Tests The following lists the tests available on your DSU Refer to the Test Branch section of Chapter 4 for further test information as well as m...

Page 35: ...DSUs can be installed in the carrier Refer to the COMSPHERE 3000 Series Carrier Installation Manual for additional carrier and installation information The DSU is delivered ready to install in the carrier It is configured as a control DSU for operation at 9 6 kbps on a multipoint circuit A rear connector plate which is installed onto the rear of the carrier is shipped with the DSU The rear connect...

Page 36: ...connecting the DSU you need to contact the telephone company to coordinate your installation before connecting the DSU to their network The DSU can only be operated at the data rate for which access to the DDS network is provided If a DBM is installed the DSU must also be connected to the dial network You must notify the telephone company before you connect to the dial network Refer to the notice ...

Page 37: ...witch Position Switch Setting Function S1 1 ON default Permissive V 32 DBM transmit output level of 9 dBm S1 1 Off Programmable V 32 DBM transmit level between 12 dBm and 0 dBm ON Frame ground FG connected to signal ground SG S1 2 Off default FG connected to SG through 100 ohm resistor ON is to the rear as you face the front of the DSU Off is to the front ...

Page 38: ...2 and 3 J20 Left Alarm Monitoring used with the 48 Vdc Central Office Power Unit Left Disables the 48 Vdc alarm monitoring function Pins 1 and 2 This is the factory default Right Enables the 48 Vdc alarm monitoring function Pins 2 and 3 the NMS adapter cable is being used for alarm monitoring J21 Right Alarm Monitoring used with the 48 Vdc Central Office Power Unit Left Enables control of alarm mo...

Page 39: ...SU from the carrier Procedure 1 At the rear of the carrier set the tab on the rear connector plate into one of the slotted grooves on the carrier s backplane Loosely fasten the screws Make sure the rear connector plate uses the same slot position intended for the DSU 2 Loosely fasten the screw attached to the rear connector plate allowing for slight adjustment that may be needed when installing th...

Page 40: ...ircuit card into the top and bottom circuit card guides for the slot that contains the rear connector plate Slide the DSU into the slot aligning the circuit card with the rear connector plate until the connectors seat firmly into the back of the carrier Press the faceplate latch to secure the DSU into the carrier rotate the circuit pack lock into the closed position Figure 3 3 and tighten the scre...

Page 41: ...d a V 35 adapter cable Feature Number 3000 F1 510 b Connect the 34 pin end of the DSU s V 35 cable to the V 35 adapter then tighten the screws on each side of this connector 8 The installed DSU is connected to the DDS network through the 50 pin connectors at the rear of the carrier These interfaces are specified in the USOC RJ48T and the pin assignments are shown in Appendix D Proper network conne...

Page 42: ...trol PTPT for a point to point tributary MPTC for a multipoint control MPTT for a multipoint tributary 7 Press the F1 key to SAVE the selected configuration The Save to screen appears 8 Save the selected configuration to Activ F1 key 9 Press the key to return to the top level menu then select Local again 10 Select the Test branch F3 The Run Test on screen appears 11 Select the device that Failed t...

Page 43: ... 35 adapter plug or V 35 adapter cable Feature Number 3000 F1 510 is needed This adapter provides the interface between the 25 pin V 35 D type connector and a V 35 DTE cable Each DSU can be configured to use either interface EIA 232 or V 35 independent of other DSUs in the carrier Connection of the DSU to the DTE is a matter of selecting and installing the appropriate cable Refer to the COMSPHERE ...

Page 44: ...ol then the tributary An address issued from the NMS takes the format of control channel control network address tributary network address This is called link level network addressing Figure 3 5 shows an example of DSU and DBM addressing as well as link level network addressing Refer to Chapter 4 to learn how to set the DSU s network address Verifying Operation and Testing Connections Verification...

Page 45: ...ain The SDCP accesses the DSU in Carrier 1 Slot 1 The top level menu your starting point of the carrier mounted DSU is displayed F1 1 01 A DSU 9 6 C Local Remot F2 F3 From the first line of this example you can see that this is a carrier mounted DSU 1 01A instead of Port1 that is located in Carrier 1 Slot 1 is operating as a DSU i e not as a DBM at 9 6 kbps and is configured as a control C From th...

Page 46: ...tion of Chapter 4 for further test information as well as more detail on how to configure and operate the DSU Refer to Appendix A to determine how best to access each test Device Test Devic Local Loopback LL DTE Loopback DTE Digital Loopback DL Remote Digital Loopback RL Bilateral Loopback Digital Test DT End to End Test EE Bit Error Rate Test BERT Lamp Test Lamp ...

Page 47: ...anual DDS Restoration 4 8 Manual Dial Backup Termination 4 8 Test Branch 4 9 Abort 4 9 Device Test 4 9 Loopback 4 9 Local Loopback 4 9 DTE Loopback 4 10 Digital Loopback 4 10 Remote Digital Loopback 4 10 Bilateral Loopback 4 10 Digital Test 4 10 End to End Test 4 11 Bit Error Rate Test 4 11 Lamp Test 4 12 Configuration Branch 4 12 Selecting Menu Mode 4 12 Selecting an Application Configuration 4 1...

Page 48: ...ree Refer to Appendix A as you perform the procedures described in this guide to help you quickly learn more about your DSU DCP and SDCP Operation There are two types of control panels one for each DSU model The standalone Model 3550 DSU Figure 4 1 is controlled from its diagnostic control panel DCP the carrier mounted nest or rack mounted Model 3551 DSU Figure 4 2 is controlled from a shared diag...

Page 49: ...s have a 2 line 16 character liquid crystal display LCD and a keypad through which you can Monitor the unit s health and status Initiate dial backup Initiate diagnostic tests Load or change the unit s configuration or how it will operate Enable or disable the DSU s DBM s or port s transmitter Display or change the status of the general purpose external DTE leads The DCP s LCD displays the result o...

Page 50: ...n progress Refer to Appendix A as you read about the branches and subbranches Status Branch The Status Stat branch reports on the health and status of the DSU DBM TDM Flex the DTE interface the quality of the dial connection the identity of the DSU model number serial number etc and the terminal s power where it checks the presence of voltage on the DTE s RTS lead Health and Status The Health and ...

Page 51: ...based upon a monitoring period of approximately 3 seconds The DTE interface statuses are displayed in sets Use the or key to scroll each set of lead statuses into view Circuit Quality Circuit Quality CircQ shows the level and quality of the signal being received from the network by the DBM This subbranch is only available for a V 32 DBM Identity Identity ID displays a listing of the DSU s model an...

Page 52: ...configurations Backup is controlled primarily by software configuration options in the DBM or ExtBU and Backup option sets The unit can be configured so that backup can be either automatic or manual Backup can be controlled from either the DSU s control panel or a 6700 Series NMS Backup begins with configuring the unit Configuring the Unit for Dial Backup The following configuration options should...

Page 53: ... the amount of time that the DDS circuit must be back in service before automatic restoration is attempted from 1 to 60 minutes the default is 5 minutes TriesTimeOut Specify the overall time limit during which a DBM will automatically attempt to establish a dial backup call from 1 to 60 minutes the default is 15 minutes Auto Bckup must be enabled MultiCall Select Enab When enabled instead of follo...

Page 54: ...1 Go to the Bkup option set under the Confg branch and set Auto Bckup to Disab 2 Select Bckup Backup branch to select a telephone number from the Backup Directory If the telephone number in the Backup Directory is the number you want to dial go to Step 5 3 Select Dial the Backup Dir screen is displayed identifying the Backup Directory indicator 4 Select another telephone number to call Press the F...

Page 55: ...lays the message Command Complete Device Test The Device Devic Test uses a test pattern generator built into the DSU If a DBM is installed the DBM must be in Idle mode with no call in progress if you want to run a Device Test NOTE On power up the DSU sends out polls to determine whether a DBM is installed It then initiates a Device Test on itself and the DBM The results of the tests appear momenta...

Page 56: ...ice is looped back from the receiver to the transmitter in the remote DSU and returned to the local DSU In Remote Digital Loopback the local DSU control or tributary puts the remote DSU into Digital Loopback A control DSU can originate Remote Digital Loopback in a point to point or multipoint network whereas a tributary DSU can originate Remote Digital Loopback in a point to point network only Whe...

Page 57: ...lts by putting the remote DSU or DBM into Digital Loopback and checking the returned pattern for errors or by simultaneously executing a BERT in the local DSU The test continues until aborted from the DCP or NMS This test can be run on a per port basis if a TDM Flex is installed A control DSU can initiate a Bit Error Rate Test in a point to point or a multipoint network A tributary DSU can only in...

Page 58: ...nd return you to the DSU Test menu so you can abort the test Once aborted the LCD and LEDs stop flashing Configuration Branch The Configuration Confg branch allows you to configure or customize the DSU and its equipment DBM or TDM Flex to fit your site s requirements to enter and change telephone numbers if a DBM is installed and to specify the mode for viewing or editing configuration options The...

Page 59: ...ix A as you follow these steps Procedure 1 Select Confg Configuration branch 2 Press the F1 key to select Opts Configuration Options subbranch The Load from screen appears 3 Press the or key to scroll the desired configuration into view NOTE By referencing the menu in Appendix A you will see that pressing the key is more efficient if the unit is to operate on a multipoint circuit 4 Make your selec...

Page 60: ... the Edit Save menu 8 Select SAVE F1 9 Select Activ F1 from the Save to screen Command Complete appears to confirm that the configuration is saved Reconfiguring a TDM Flex Port The Connecting the DSU to a DTE section of Chapter 2 tells you how to connect Port 2 if your DSU is equipped with a TDM Flex With the TDM Flex option you can configure each port Port 1 or Port 2 independently e g one port c...

Page 61: ... Procedure 1 Select PList F2 2 Select Displ F1 The following screen appears F1 A d d r 2 A c t i v e F2 F3 The number after Addr in this example 2 is the network address of the poll list member The member is identified as either Active or Skip identified via the Change Poll List function 3 Press the F1 or F2 key to display additional addresses 4 Press the key to return to the Poll List screen Chan...

Page 62: ...yed as previously shown F1 D e l 3 f r PL i s t Command Complete F2 F3 The tributary DSU associated with the address is removed from the poll list Acquiring the Poll List To automatically generate a poll list Procedure F1 P o l l L i s t Displ Clr Chang F2 F3 1 Press the key to display Acq F1 P o l l L i s t Acq Displ C l r F2 F3 2 Select Acq F1 F1 A c q u i r P o l l L i s t Abort F2 F3 You can s...

Page 63: ...ntered similarly to entering a number into Dir 5 Select Chang F1 to add or change a telephone number The Enter Dir screen appears Press the F1 key to increment the Directory entry indicator the default is 1 For this example assume that you are entering your first directory entry 6 Select Load F2 The Directory entry appears on the first line the cursor is positioned in the first position of the cur...

Page 64: ...rk address Addr is the network address of the local DSU It is only available from the Local branch The DSU s network address is a number in the range of 1 to 254 if the DSU has a DBM installed The DBM automatically acquires an address equal to the DSU s plus 1 Assigning an Address The Addressing the Unit sections of the installation chapters Chapters 2 and 3 provide guidelines for assigning an add...

Page 65: ... Local branch This selection allows you to monitor the port at any given time When selected the port s lead activity is reflected in the DCP circuit designation status indicators TXD RXD etc on the faceplate of the Model 3551 DSU or on the DCP of the Model 3550 DSU External Leads The External Leads ExtL selection allows you to display the state of four general purpose leads on the EIA 232 D V 24 P...

Page 66: ...Display command to determine what caused the event If the CCN event was caused by a change in the external leads select Displ F1 to see the current states of the leads If a positive voltage is detected in either one of the input leads an external leads alarm is also reported Messages Branch The Messages Msgs branch of the top level menu allows the DSU to receive messages from the NMS It only appea...

Page 67: ...ay only no changes S Control branch Display External Leads only no changes The 3550 Series DSUs are shipped from the factory with the security level set to Unlock When the DCP is locked only the Local branch appears on the control DSU If the security has not been set on the DCP before the following appears F1 FP Access Lock Unlock Save F2 F3 To select the security level Procedure 1 Press the key t...

Page 68: ...COMSPHERE 3550 Series Data Service Units 4 22 July 1999 3550 A2 GB20 40 ...

Page 69: ...ustomer defined set of stored configuration options By predetermining and storing a frequently used configuration the stored option set can be loaded quickly as operating requirements change NOTE The PTPC PTPT MPTC and MPTT areas are read only storage areas configuration option changes cannot be saved to these areas The factory loaded configuration option sets for a point to point control DSU are ...

Page 70: ... F3 directly below Confg 3 Select Opts Configuration Options 4 Select storage area Activ Remt Usr1 etc from the Load from screen If the unit is a control and you select Remt enter the network address of the remote DSU 5 Select the option set e g DSU Diag DBM to be edited The first configuration option within that set appears Page through each configuration option within the set as follows a Press ...

Page 71: ...option sets available to the unit of configurations are sent to the tributary and saved to its Activ area Remember that you cannot save to the factory loaded configurations Example Using the DCP In this example load the configuration options stored in the PTPT area change Diagnostic Type Diag Type under the Diagnostic DSU option set from Disr to NonD change DTE Port under the General option set fr...

Page 72: ...g Type NonD Next NonD Disr F2 F3 F1 Chang Diag Opts DSU DBM Gen F2 F3 F1 Edit Save SAVE DSU Diag F2 F3 F1 Edit Save DSU Diag DBM F2 F3 F1 Edit Save Diag DBM Gen F2 F3 F1 DTE Port EIA232 Next EIA232 V 35 F2 F3 F1 DTE Port V 35 Next EIA232 V 35 F2 F3 F1 Edit Save SAVE DSU Diag F2 F3 F1 Save to Activ Usr1 PTPC F2 F3 F1 Save to Usr1 Please wait F2 F3 F1 Save to Usr1 Command Complete F2 F3 ...

Page 73: ...peed DBM Configuration Options Table 5 13 Port Speed External DBU Configuration Options Table 5 14 Understanding the Tables Refer to the appropriate tables when configuring the DSU Each configuration option is segmented into three sections the option as it appears on the DCP an explanation of the option then the values that can be selected or set Each table shows each configuration option as it is...

Page 74: ...is only displayed if a TDM Flex is installed and enabled DDS Select the DDS network when the DSU is connected to a DDS network and the network provides the timing or when a LADS configuration with a remote DSU is providing the timing Msg Clamp Enab Next Enab Disab Prev Message Clamping only displayed when Full Mode is enabled Controls data lead behavior when disruptive diagnostic tests and command...

Page 75: ...o not have an extended network 19 2 PowrLvl 6 Next 6 0 10 Prev 19 2 kbps Power Level only displayed when Full Mode is enabled and when Rate Kbps is set to 19 2 kbps This configuration option selects the appropriate power level in dBm for operation at 19 2 kbps 6 Select for DDS network service 0 Select for an alternate DDS service 10 Select for LADS operation V 54 Lpbk Disab Next Enab Disab Prev V ...

Page 76: ...no diagnostic communications with remote devices 2nd Ch bps 400 Next 100 400 800 1200 1600 Prev In band Secondary Channel Diagnostic Transport Speed in bps only displayed when Diag Type is set to NonD and Full Mode is enabled This configuration option allocates the DSU s port bandwidth when there is no excess bandwidth available for in band secondary channel transport used for diagnostic data oper...

Page 77: ...cs are to be allowed that is there will be no diagnostic communications with remote devices 2nd Ch bps 400 Next 100 400 800 1200 1600 Prev In band Secondary Channel Diagnostic Transport Speed in bps only displayed when Diag Type is set to NonD and Full Mode is enabled This configuration option allocates the DBM s port bandwidth when there is no excess bandwidth available for in band secondary chan...

Page 78: ...ect if the DSU is a control PTPC or MPTC configuration Trib Select if the DSU is a tributary PTPT or MPTT configuration LinkConfig Pt Pt or M Pt Next Pt Pt M Pt Prev Link Configuration Used to define a point to point or multipoint circuit this configuration option is required for proper testing dial backup unit operation and is required when using nondisruptive diagnostics Pt Pt Select for a point...

Page 79: ...red is from 0 seconds up to 50 seconds Packet Delay 0s Next 0s 1s 2s 5s Prev Packet Delay specified in seconds only displayed when Position is set to Cntrl and Full Mode is enabled Used only for a control DSU or DBM this configuration option controls the amount of time that a DSU or DBM will wait for a packet to complete from an NMS NOTE Must be used when the DSU s diagnostic channel operates over...

Page 80: ...o take timing from the remote DBM s clock source Ext Select external clock source when timing is taken from the external Transmit Timing lead on Port 1 not displayed if a TDM Flex is installed Prt1 or Select the port that timing is to be taken from using the selected port s external Transmit Prt2 Timing lead displayed if a TDM Flex is installed and is enabled DSU Select the DSU s clock source when...

Page 81: ...on the DBM s transmitted data TXD lead serial data is clocked into the DBM s elastic store using clock provided by the extended circuit received clock lead The DBM s own system timing is used to clock data out of the buffer Transmit Elastic Store is reset each time the unit powers up the buffer overflows or after the RTS lead makes an Off to ON transition Enab Select enable when interfacing with a...

Page 82: ...urity checking is performed This feature is provided for customers that provide data services to other customers that may not have Model 3550 or 3551 DSUs and DBMs RxPwd password Next Chang Prev Receive Password only displayed when Call Setup is set to Callbk or Pswrd and when Full Mode is enabled The DBM expects to receive a password from the remote DBM This password must be the remote DBM s tran...

Page 83: ...urned Off when RTS is turned Off at the tributary DBM The V 13 sequence is sent over the network to tell the control to turn ON LSD only for a MPTC or MPTT configuration Disab Select when configured for point to point nondisruptive diagnostics or point to point rate adaption V 13 Signaling is turned Off Dial Test Disab Next Enab Disab Prev Dial Tone Test only displayed when Full Mode is enabled Wh...

Page 84: ...ailable The external DBU must be set for Dial on DTR None Select to disable the external DBU This is the default setting Rate Kbps 9 6 Next 64 56 38 4 28 8 19 2 14 4 9 6 4 8 2 4 1 2 Disab Prev Backup Rate for the External Dial Unit DBU 64 to Select the data rate to match the external DBU s port speed 1 2 kbps TxClkSource DCE Next DCE Prt1 Prt2 Prev Transmit Clock Source Specifies the transmit timi...

Page 85: ... Prev Clear to Send Control Controls the behavior of the CTS lead when abnormal conditions are present e g No Signal or Test Mode as determined by the configuration options RTS Cntrl and Circ Assur Std Select for all factory loaded configurations PTPC PTPT MPTC and MPTT so that the DSU responds to abnormal conditions When selected CTS follows RTS except when the DSU is in Test Mode or an alarm or ...

Page 86: ...vior of the DSR lead in response to a No Signal Out of Service or Out of Frame alarm from the network Enab Select if a network alarm is to turn DSR Off Disab Select if a Model 3551 DSU with a V 32 DBM that is configured with its Primary Core configuration option set to Yes DBM option set is part of your network configuration When selected a network alarm will not affect DSR DSR on Tst Enab Next En...

Page 87: ... Loopback occurs when a Digital Loopback occurs Enab Select for a DTE Loopback to be run whenever a Digital Loopback occurs Disab Select for the DSU to ignore requests for a Bilateral Loopback Ext Leads Rate Next ExtLd Rate RPowr Prev External Leads only displayed when Full Mode is enabled Controls the use of the general purpose leads on the EIA 232 D V 24 interface for Port 1 except when Rate is ...

Page 88: ...aracter only displayed with no TDM Flex installed Specifies the length of a character including the parity bit but excluding the start and stop bits This configuration option only applies when Async Sync is enabled 6 to 10 Select the number of asynchronous bits per character When Stop Bits is set to 2 10 will not be displayed Stop Bits 1 Next 1 2 Prev Stop Bits only displayed with no TDM Flex inst...

Page 89: ...On Enab Select if the DSU should try and attempt to establish a dial backup connection to a remote DSU after the Network Time out Disab Select if a dial backup connection should not be attempted when CMI is detected AutoRestor Disab Next Enab Disab Prev Automatic Restoration Controls whether the DSU automatically terminates the dial backup call when the DDS circuit has returned to service On point...

Page 90: ...ipoint dial backup this configuration option selects the multiple calling cycle in which the DBM steps through the Backup Directory attempting to call each valid telephone number in the directory or selects the normal calling cycle This configuration option only has an effect if Auto Bckup is set to Enab Enab Select if the multiple calling cycle is to be used The DBM makes one attempt to call the ...

Page 91: ...tention between the ports in a digital sharing group Host Select if the Host protocol must enforce the order of transmission to avoid collisions DSD Select for Digital Sharing Device if selection of the next port to transmit is based upon the lowest numbered port that is ready to transmit Table 5 11 1 of 4 MUX Port Configuration Options DTE Port EIA232 Next EIA232 V 35 Prev DTE Port Selects the po...

Page 92: ...Bits configuration option only displays 1 6 to 10 Select the asynchronous bits per character Stop Bits 1 Next 1 2 Prev Stop Bits Specifies the number of stop bits in an asynchronous character This configuration option is displayed only if the Async Sync configuration option is enabled and AsyncBit Char is set to 6 7 8 or 9 If AsyncBit Char is set to 10 only 1 stop bit appears 1 to 2 Select the num...

Page 93: ... Const Next Const Cntrl Mark Prev Receiver Carrier Select only displayed when Full Mode is enabled Enables the TDM Flex receiver circuitry to simulate switched carrier operation using the V 13 codes on an individual circuit NOTE Configuration values Const and Cntrl for Receiver Carrier Select are both valid choices for a port belonging to a digital sharing group Const Select Constant carrier opera...

Page 94: ...hen Full Mode is enabled Causes the DSU to report an alarm for the port if the port s DTR lead is Off for more than 30 seconds The DCP displays DTR Alarm and reports the alarm to NMS Enab Select if you want the DSU to report an alarm when the port s DTR lead turns Off for 30 seconds Disab Select if no alarm is to be reported regardless how long the port s DTR lead is Off AntiStream Disab Next Chan...

Page 95: ...he DSU verifies that the sum of the individual port speeds does not exceed the primary aggregate speed set in Rate Kbps in the DSU option set If the sum of the port speeds equals the primary aggregate rate an underspeed port selection is required Underspeed Disab Next Disab Prt1 Prt2 Prev Underspeed Port Selects which port is to run slightly underspeed to allow for in band framing and in band seco...

Page 96: ...ption Verification For all ports the DSU verifies that the sum of the individual port speeds does not exceed the primary aggregate speed set in Rate Kbps in the DBM option set If the sum of the port speeds equals the primary aggregate rate an underspeed port selection is required Underspeed Disab Next Disab Prt1 Prt2 Prev Underspeed Port Selects which port is to run slightly underspeed to allow fo...

Page 97: ...ports the DSU verifies that the sum of the individual port speeds does not exceed the primary aggregate speed set in the external DBU s Rate Kbps configuration option If the sum of the port speeds equals the primary aggregate rate an underspeed port selection is required Underspeed Disab Next Disab Prt1 Prt2 Prev Underspeed Port Selects which port is to run slightly underspeed to allow for in band...

Page 98: ...COMSPHERE 3550 Series Data Service Units 5 30 July 1999 3550 A2 GB20 40 ...

Page 99: ...his point from anywhere in the menu by pressing the key Pressing this key immediately terminates any operation or work in progress The following shows an example of the top level menu for a standalone Model 3550 DSU that is configured as a control operating at 9 6 kbps with an NMS message waiting F1 Port1 DSU 9 6 C Local Remot Msg F2 F3 The following information is displayed Line 1 Source of the i...

Page 100: ...COMSPHERE 3550 Series Data Service Units A 2 July 1999 3550 A2 GB20 40 ...

Page 101: ...DSU Menu A 3 3550 A2 GB20 40 July 1999 ...

Page 102: ...DBM if installed and the backup circuit if there is a backup call established If a TDM Flex is installed testing is available on a per port basis NOTE If the Test branch does not appear the DSU is in Display mode values can be read but not changed Only authorized persons can change configuration option values for the DSU Contact your System Administrator for further information The Configuration C...

Page 103: ...tion Option Tables section Chapter 5 when configuring the unit or when more detailed configuration information is needed Instructions Configuration Worksheets can be used for reference or they can be used to record changes made to the DSU s configuration options or to record the configurations saved to the Usr1 storage area 1 Select the worksheet version you will be editing Full Mode Enab or Disab...

Page 104: ...General Value Position Cntrl Trib LinkConfig Pt Pt M Pt Resp Period 1 2 10 TribTimOut Chang min sec 5 sec to 10 min Link Delay 0s 1s 2s 5s 10s 20s 50s Packet Delay 0s 1s 2s 5s M Pt SymPrt Enab Disab DBM Value Rate Kbps 14 4 12 0 9 6 4 8 2 4 PrtSp Kbps 14 4 12 0 9 6 4 8 1 2 Disab TxClkSource Int RXC Ext Prt1 Prt2 DSU CarrLossDisc Yes No Auto Retrain Yes No Single Rate Yes No AutoAnswer Enab Disab T...

Page 105: ...isab DSR on Tst Enab Disab Port Speed DSU Value Prt1 xx x 64 56 48 19 2 9 6 4 8 2 4 1 2 Disab Prt2 xx x 64 56 48 19 2 9 6 4 8 2 4 1 2 Disab Underspeed Disab Prt1 Prt2 Port Speed DBM Value Prt1 xx x 14 4 56 12 0 9 6 4 8 2 4 1 2 Disab Prt2 xx x 14 4 12 0 19 2 9 6 4 8 2 4 1 2 Disab Underspeed Disab Prt1 Prt2 Port Speed External DBU Value Prt1 xx x 64 56 48 28 8 19 2 14 4 9 6 4 8 2 4 1 2 Disab Prt2 xx...

Page 106: ...1 2 Disab TxClkSource Int Ext DDS Prt1 Prt2 Diagnostic DSU Value Diag Type NonD Disr Mixed None Diagnostic DBM Value Diag Type NonD Disr Mixed None Diagnostic External DBU Value Diag Type Disr None Diagnostic General Value Position Cntrl Trib LinkConfig Pt Pt M Pt External DBU Value ExtBU Ansr Orig None Rate Kbps 64 56 38 4 28 8 19 2 14 4 9 6 4 8 2 4 TxClkSource DCE Prt1 Prt2 General Value DTE Por...

Page 107: ... 2 5 RTS Cntrl FrcOn DTE Port Speed DSU Value Prt1 xx x 64 56 48 19 2 9 6 4 8 2 4 1 2 Disab Prt2 xx x 64 56 48 19 2 9 6 4 8 2 4 1 2 Disab Underspeed Disab Prt1 Prt2 Port Speed DBM Value Prt1 xx x 14 4 12 0 9 6 4 8 2 4 1 2 Disab Prt2 xx x 14 4 12 0 9 6 4 8 2 4 1 2 Disab Underspeed Disab Prt1 Prt2 Port Speed External DBU Value Prt1 xx x 64 56 48 28 8 19 2 14 4 9 6 4 8 2 4 1 2 Disab Prt2 xx x 64 56 4...

Page 108: ...COMSPHERE 3550 Series Data Service Units B 6 July 1999 3550 A2 GB20 40 ...

Page 109: ...ear on the control panel while a command is executing or when a command is prevented from executing are also described Status Indicators Status indicators provide information on the current operating condition of the DSU The status indicators of the Model 3550 DSU appear on the DCP s faceplate The status indicators for the carrier mounted Model 3551 DSU are spread across the the faceplate of the D...

Page 110: ... 1 Dial Yellow DBM is active Rapid flashing Call setup in progress Slow flashing Call established but in Standby mode Steady ON Backup call established and active TXD RXD RTS CTS DSR DTR LSD Green Internal lead states at the DSU DTE interface circuit designations Control circuit active or Data circuit SPACE ing Front Panel Model 3551 only Yellow DSU is currently selected at the SDCP The SDCP addre...

Page 111: ...nfiguration options from one of the default factory loaded option sets stored in the PTPC PTPT MPTC or MPTT DBM Device Fail Internal failure is detected in the DBM DBM Disable DBM transmitter is disabled DBM is in Idle mode but no calls can be initiated or answered nn nDBM mode nn n indicates the DBM speed mode is one of the following Standby A dialed connection is made but the data is still route...

Page 112: ... Bit Error Rate Test BiL Bilateral Loopback Dev Device Test DL Digital Loopback DT Digital Test DTE DTE Loopback E E End to End Test Lamp Lamp Test NetL Network Loopback RL Remote Digital Loopback TM Test Mode init is one of the following initiators DTE Data Terminal Equipment FP Front Panel the DCP NMS Network Management System Ntwk Network Remt Remote DSU External Alarm A The DSU detects a posit...

Page 113: ...one of the following initiators DTE Data Terminal Equipment FP Front Panel the DCP NMS Network Management System Remt Remote DSU Redun Fan Alarm Indicates a problem with the fan on the 48 Vdc Central Office Power Unit Redun Pwr Alarm Indicates a problem with the power on the 48 Vdc Central Office Power Unit Subnetwrk Alarm A major alarm was set Off by one of the devices in your subnetwork Check th...

Page 114: ...Fail1 oldest Fail2 and Fail3 most recent The reason for failed dial attempts include Abort Call User aborted call BadPermiss A dial attempt was made but a backup connection already exists Bad Phone Unassigned number or illegal characters Busy Line or network busy DBM Disab DBM disabled no call can be initiated or answered DTR Discon DTR disconnected No Answer There is no answer at the remote DBM o...

Page 115: ...rnal lead alarm a or b Facil DDS facility alarm Indicates a network facility alarm MUX Indicates a MUX TDM Flex failure NoResp The active poll list member did not respond Probable cause a facility problem a remote DSU problem or an incorrect poll list Normal Active poll list member does not report an alarm or its status RPower Redundant power supply alarm Stndby DBM is in Dial Standby Stream Strea...

Page 116: ...ing call DBM Callback Callback sequence has initiated DBM Connected DBM is connected DBM Disabled No calls can be initiated or answered DBM Ringing Ringing at remote DBM or external DBU dial backup unit DBM Standby A connection is made but the digital circuit is still the active link DBM Starting Up The DBM is training for synchronization DBM WaitForAnswr A call has been placed and the DBM is wait...

Page 117: ...ess 2 Either wait for the test to finish or abort the test 3 If there is no test in progress check configuration options Not in Menu Command is not in the supported set Use a valid command No Response Invalid remote address or remote device is not powered connected to network or enabled Check remote address Command Failed Command could not execute and none of the error messages above apply If prob...

Page 118: ... was no answer from the remote DBM or modem 1 Check that remote DBM is configured for many calls 2 Make sure remote DBM is properly connected to the dial network 3 Check operational status of remote DSU using a Device Test 4 Attempt to place a call from remote DBM If it cannot be placed replace the DBM DBM NoDialTone Yes No dial tone received from the network Check the dial network connections If ...

Page 119: ...h DSU or DBM in the PrtSp configuration sub menu DSD Speeds diff Not all of the TDM Flex ports in the digital sharing group are set to the same speed Set all of the ports in the digital sharing group to the same speed via the appropriate path DSU or DBM in the PrtSp configuration submenu DSD Wrong RTS One or more TDM Flex ports in a digital sharing group with DSD port control have an incorrect RTS...

Page 120: ...ve and an attempt is made to configure it for underspeed no underspeed port is required Disable the port s underspeed configuration option via the appropriate path DSU or DBM in the PrtSp submenu Port Off Undersp A TDM Flex s port is disabled and is also set to run underspeed port that is disabled cannot run underspeed Correct the problem in one of two ways 1 Set the port speed to any value but Di...

Page 121: ... all ports are configured for asynchronous operation Correct the problem in one of two ways 1 Increase the DSU s DBM s or ExtBU s data rate 2 Decrease the DSU DBM or ExtBU port speeds and the Async rate via the PrtSp submenu Undersp Required The sum of the TDM Flex port speeds equals the DSU DBM or ExtBU rate and at least one port is configured for synchronous operation but no port is configured f...

Page 122: ...COMSPHERE 3550 Series Data Service Units C 14 July 1999 3550 A2 GB20 40 ...

Page 123: ...s pin assignments Table D 4 provides the 3600 Hubbing Device s CC IN DC OUT jack pin assignments Figure D 3 shows the Model 3551 DSUs rear connector plate Table D 5 provides the EIA 232 V 24 connector s pin assignments Figure D 4 shows the V 35 adapter that is shipped with the rear connector plate it provides the interface between the port s D type connector and the DTE cable s V 35 connector Tabl...

Page 124: ...eived data from local loop 8 R Received data from local loop Table D 2 Model 3550 Dial Analog Network 6 Pin Cable Connector Pin Assignments Pin Circuit Function 3 T Tip V 32 DBM 4 R Ring V 32 DBM 3000HUBBIN G DEVIC E MODEL 3000 F 3 3 00 8 Pin Modular Jacks 6 Inches Overall 4 Pin Modular Plug 496 13775 03 8 1 Pin Numbers 8 1 C C I N D C O U T C C O U T D C I N CC IN DC OUT Hubbing Device CC OUT DC ...

Page 125: ...CCIRD Input 3 Signal Ground Ground 4 DCORD CCISD Output Table D 4 3600 Hubbing Device CC IN DC OUT Jack Pin Assignments Pin Signal Name In Out CC IN DC OUT 1 V Pass Through N C N C 2 DCOCTS CCIRTS IN RTS CTS 3 DCORTS CCICTS OUT CTS RTS 4 DCOSD CCIRD OUT RD SD 5 Signal Ground GND GND 6 DCORD CCISD IN SD RD 7 N C N C N C 8 V Pass Through N C N C ...

Page 126: ...COMSPHERE 3550 Series Data Service Units D 4 July 1999 3550 A2 GB20 40 Figure D 3 Model 3551 DSU 25 Pin EIA 232 25 Pin V 35 Rear Connector Plate 3000 F1 021 ...

Page 127: ...lector II DCE Source alternate external control Lead II 14 SBA 118 Secondary Transmit Data 15 DB 114 Transmitter Signal Element Timing DCE Source 16 SBB 119 Secondary Received Data 17 DD 115 Receiver Signal Element Timing DCE Source 18 LL 141 Local Loopback LL 191 Data Signal Rate Selector II DTE Source alternate external control alarm Lead II 20 CD 108 2 Data Terminal Ready DTR 21 RL 140 Remote D...

Page 128: ...nd RTS 5 D Clear to Send CTS 6 E Data Set Ready DSR 8 F Received Line Signal Detect LSD 20 H Data Terminal Ready DTR 21 J Ring Indicator RI 18 L Local Loopback LL 19 N Remote Digital Loopback RL 24 11 P S Transmit Data TXD 23 22 R T Received Data RXD 15 2 U W Transmitter Signal Element Timing DTE Source 16 3 V X Receiver Signal Element Timing DCE Source 14 1 Y AA Transmitter Signal Element Timing ...

Page 129: ...Pin Assignments D 7 3550 A2 GB20 40 July 1999 Figure D 5 EIA 232 D Crossover Cable 4951 035F ...

Page 130: ...V X U W A B C F H E T R S P L Z W U X V A B F C E H P1 PIN P2 PIN 99 16328 C A D B KK MM LL NN P1 C A D B KK MM LL NN P2 15 FT 0 5 FT TXD A TXD B RXD A RXD B TX CLK A TX CLK B RX CLK A RX CLK B EXT CLK A EXT CLK B FRM GND SIG GND RTS CD DTR DSR Figure D 6 V 35 Crossover Cable 3211 178F ...

Page 131: ... DSU s control panel or a 6700 Series NMS External dial backup units DBUs like 3800 Series modems can also be used for backup when the External Backup ExtBU configuration option is enabled refer to Chapter 5 Figure E 1 shows a point to point configuration using both a carrier mounted Model 3551 DSU and a standalone Model 3550 DSU configured as controls These units have the PTPC configuration The s...

Page 132: ...COMSPHERE 3550 Series Data Service Units E 2 July 1999 3550 A2 GB20 40 Figure E 1 Point to Point Application Configurations with Internal and External V 32 Backup ...

Page 133: ...r a 6700 Series NMS Figure E 2 shows sample multipoint configurations Using this application backup is provided via modems rather than a DBM In this case a matrix switch at the control site switches data from the FEP ports to the modems On the tributary side of the configurations either standalone Model 3550 DSUs equipped with DBMs or connected to an external DBU are shown Figure E 2 Multipoint Ap...

Page 134: ...COMSPHERE 3550 Series Data Service Units E 4 July 1999 3550 A2 GB20 40 ...

Page 135: ...odel 3550 2 port TDM Flex 3000 F1 510 106476237 ACCULINK 3100 Series CSU Wall Mount Adapter for Model 3550 3100 F1 400 406941674 Model 3551 Digital DDS Network Cables 50 pin to eight 6 pin Multiple Network Interface Adapter 1 5i 1 Model 3551 in Canada 50 pin to eight 8 pin Multiple Network Interface Adapter 1 5i 1 Model 3551 in U S A 3000 F1 009 3600 F2 503 106459621 106303837 Model 3551 Dial PSTN...

Page 136: ...etwork Interface Cables RJ48S Network Cable 14i cord included with Model 3550 8 pin to 6 pin Modular 7i Cable Model 3550 in Canada 14i 3600 F3 501 25i 3600 F3 502 3000 F1 006 107331381 107331365 106239155 Model 3550 25 pin Plug to EIA 232 Plug Cable for extended circuits select one EIA 232 Crossover Cable Pin to Pin EIA 232 Cable straight connection 15i 4951 035F 10i 4951 032F 105757520 105757496 ...

Page 137: ... DSU Wall Mount Bracket 1 17I Velcror Brand Straps 2 RS 310 C L Bracket 1 6 x 1 0I Screws 4 12 24 Screws 2 10 32 Screws 2 Clip Nuts 2 870 1751 0014 870 1770 0022 870 1809 0023 870 1817 0023 506 0025 0031 503 0002 0131 302 2508 0131 Ferrite Choke 175 0018 0031 LCD 16 characters by 2 lines with Cable 153 0009 1131 Membrane Switch 631 0014 0031 Table Top AC Transformer included with Model 3550 654 00...

Page 138: ...er Cable Pin to Pin EIA 232 Cable straight connection 15i 818 2759 0111 10i 835 4507 1011 V 35 Crossover Cable 15i 835 1092 0011 Model 3551 Digital DDS Network Cables 50 pin to eight 6 pin Multiple Network Interface Adapter1 Model 3551 in Canada 50 pin to eight 8 pin Multiple Network Interface Adapter1 Model 3551 in U S A 1 5 035 0258 0231 1 5 035 0256 0231 Model 3551 Dial PSTN Network Cable Adapt...

Page 139: ...he DTE and Digital Loopbacks operating simultaneously in the same DSU This test is selected from the General configuration option set Bilat Lpbk Enab Bit Error Rate Test BERT A test used to analyze the network circuit Both the control and tributary DSUs must be connected to the network The originating DSU sends a 511 bit test pattern transmitting over the DDS network for a DSU over the dial networ...

Page 140: ...d one for the DBM and the data can be transmitted through either also see active core CSA Canadian Standards Association CTS The state of the Clear to Send lead Data Communications Equipment DCE A device such as a DSU or modem that provides an interface between a DTE device and a digital or dial analog network also called data circuit terminating equipment data router A sophisticated circuit switc...

Page 141: ...ate test BERT from the remote DSU The local DSU receives test data loops it back to the transmitter and returns it to the network Digital Test DT A test used to test two DSUs and the circuit between them Both DSUs must be connected to the network before this test is run DIP switch Dual In line Package switch DMI Data Mode Idle Refers to a sequence of 1s transmitted or received on the DDS network W...

Page 142: ...zation Sector of the International Telecommunications Union an advisory committee established by the United Nations to recommend communications standards and policies Before March 1993 it was called CCITT LADS Local Area Data Set also called a limited distance modem or LDM This refers to a mode of operation where the control and tributary DSUs are directly connected but not passing through a DDS n...

Page 143: ...o the DSU s or DBM s diagnostic operation permissive interface A dial modem operating mode characterized by a fixed output power level of 9 dBm It is one of two possible operating modes for a DBM connected to dial lines see programmable interface physical address The shared diagnostic control panel SDCP address of a Model 3551 DSU derived from its carrier address and physical slot number point to ...

Page 144: ...ic Unit SDU A circuit card that plugs into a dedicated slot slot 0 in the COMSPHERE 3000 Series Carrier to provide the shared diagnostic control panel SDCP and network management interfaces to the DSUs in the carrier It translates the network management protocol to the devices in the carrier and routes incoming messages to the appropriate slots standalone The Model 3550 DSU which is designed for d...

Page 145: ...ynchronous operation 1 3 Auto Backup 4 7 Auto Bckup 5 21 AutoAnswer 4 6 5 13 automatic setup and restoration 1 2 AutoRestor 4 7 5 21 AutoRetrain 5 12 B backup branch 4 6 menu selections 4 8 configuration options 5 21 external dial 1 2 manual 4 8 mode external 4 7 option set 4 7 point to point 1 2 Backup Dir 5 21 Bad Phone failure message C 6 BadPermiss failure message C 6 BckUp status indicator SD...

Page 146: ... 8 command error messages C 9 progress messages C 8 communication line DSU 1 6 V 32 DBM 1 7 compatibility DBM 1 7 DSU 1 6 network DSU 1 6 NMS 1 5 Confg 4 12 Config Corrupt message C 3 configuration branch 4 12 option 5 5 options vii Backup 5 21 DBM 5 12 Diagnostic DBM 5 9 Diagnostic DSU 5 8 Diagnostic External DBU 5 10 Diagnostic General 5 10 DSU 5 6 External DBU 5 16 General 5 17 MUX Port 5 23 MU...

Page 147: ...on 2 7 3 9 interface 1 6 speed message C 5 DDS F alarm message C 4 DDS network connection figure 2 7 default setting 5 5 descriptions identity 4 6 Dev DBM test C 3 DSU test C 4 Devic 4 4 4 9 message C 7 device 3600 hubbing D 2 3600 Series hubbing pin assignments D 3 CC IN DC OUT D 3 health and status 4 4 messages C 3 test 2 12 3 12 4 9 Device Fault alarm C 2 device test DBM test message C 3 DSU te...

Page 148: ...reaming 5 17 MUX port configurations 5 26 DTE Port 5 17 5 23 DTR Alarm C 2 Discon DBM error message C 10 failure message C 6 message C 7 status indicator C 2 DTR Alarm 5 20 5 26 DTRCallCon 5 15 dynamic range 1 7 E EC status indicator SDCP C 2 editing configuration options 5 2 E E DBM test C 3 DSU test C 4 EE 4 11 EIA 232 D crossover cable figure D 7 EIA 232 V 24 connector pin assignments D 5 Elast...

Page 149: ...3 device C 3 expanded C 6 subnetwork C 7 subnetwork 4 4 heat dissipation 1 5 I ID 4 5 identity descriptions 4 6 report 4 5 Idle mode 4 7 4 8 Illegal Char DBM error message C 10 impedance 1 7 inbound 1 3 Incmpt Diag mode error message C 11 indicators status C 1 install DSU 2 4 3 5 Model 3550 2 1 interface DDS network 1 6 diagnostic 1 6 DTE 1 4 receive VF 1 7 switched network 1 7 transmit VF 1 7 V 3...

Page 150: ... C 6 format C 3 health and status C 3 progress C 8 command C 8 dial backup C 8 subnetwork health and status C 7 mode DBM C 3 Dial Backup 4 7 External Backup 4 7 Idle 4 7 Menu 5 5 Standby 4 7 Model 3550 dial PSTN network connection 2 6 dial network pin assignments D 2 digital network pin assignments D 2 NMS connection figure 2 6 Model 3551 installation and circuit pack lock 3 6 jumper straps 3 4 re...

Page 151: ...4 14 Opts 4 12 Orig 4 7 outbound 1 3 Out of Frame Threshold alarm C 2 OutofFrameThresh message C 5 OutofServc alarm C 4 Out of Service alarm C 2 Overspeed 5 20 5 24 P P Tst message C 5 Packet Delay 5 11 packets 4 11 part number F 1 F 3 Password 4 6 password characters 4 18 PCC Buffer 5 25 Phone 4 18 pin assignments CC IN DC OUT jack hubbing device D 3 connector EIA 232 V 24 D 5 V 35 D 6 dial netwo...

Page 152: ...AnStr Conflc error message C 12 RTS CTS Del 5 26 RTS TxCrr Conflc error message C 12 RxCarrSel 5 25 RXD status indicator C 2 RxElasStor 5 7 5 13 RxPwd 5 14 S safety CSA 1 4 instructions B saving configuration options 5 3 SDCP 1 2 4 2 Model 3611 faceplate 4 3 status indicators C 2 security access levels 4 21 DBM 1 2 Security failure message C 6 SecurityFail DBM error message C 10 Select key 4 3 Sel...

Page 153: ...mode DBM test message C 3 DSU test message C 4 port test message C 5 remote digital loopback 2 12 3 12 Test message C 7 Thresh message C 7 Time Division Multiplexer 1 2 TM DBM test C 3 DSU test C 4 port test C 5 Too Many Ports error message C 13 top level menu 3 11 TPwr 4 5 Training failure message C 6 transmit VF interface 1 7 transmitter control 4 19 TribTimOut 5 11 TribTm message C 7 tributary ...

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