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Northern Telecom DMS-100 Series Installation And Maintenance Manual

Digital switching systems
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DIGITAL SWITCHING SYSTEMS
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DMS*-100 FAMILY DATAPATH*
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DATA UNIT - INSTALLATION AND MAINTENANCE
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* DMS and DATAPATH are trademarks of Northern Telecom.
297-2121-226
VINTAGE 05.01
STANDARD

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Summary of Contents for Northern Telecom DMS-100 Series

  • Page 1 297-2121-226 VINTAGE 05.01 STANDARD DIGITAL SWITCHING SYSTEMS DMS*-100 FAMILY DATAPATH* DATA UNIT - INSTALLATION AND MAINTENANCE * DMS and DATAPATH are trademarks of Northern Telecom.
  • Page 2 297-2121-226 VINTAGE 05.01 (c) Northern Telecom 1989, 1990, 1993...

  • Page 3: Table Of Contents

    297-2121-226 VINTAGE 05.01 CONTENTS CHAPTER 1: ABOUT THIS DOCUMENT PURPOSE ......APPLICABILITY OF THIS DOCUMENT ... . . How to identify the software in your office .
  • Page 4 297-2121-226 VINTAGE 05.01 Mechanical Specifications ....3-40 Electrical Specifications ....3-40 Environmental Specifications ... . 3-40 Regulatory Compliance .
  • Page 5 297-2121-226 VINTAGE 05.01 Installing the NT4X25DH shelf ... . Installing the Rackmount Shelf Alarms ..4-11 Connecting Data Lines to the Shelf ..4-12 Setting the Configuration Switches .
  • Page 6 297-2121-226 VINTAGE 05.01 NT4X25AF /AH Switch Settings for CTS Delay ..3-21 3.10 NT4X25AD /AV /CH /DF Rackmount DU - Front View . . 3-26 3.11 MI Pulse/MI Level and MI Invert/Normal Settings . . 3-36 3.12 NT4X25CH Switch Settings for Modem Pool CTS Delay 3-38 3.13...

  • Page 7: Chapter 1: About This Document

    297-2121-226 VINTAGE 05.01 CHAPTER 1 ABOUT THIS DOCUMENT...
  • Page 8 297-2121-226 VINTAGE 05.01...

  • Page 9: Purpose

    NT4X25DH data unit shelf: NT4X25DK NT4X25DL APPLICABILITY OF THIS DOCUMENT Northern Telecom (NT) software releases are referred to as batch change supplements (BCS) identified by a number, for example, BCS26.

  • Page 10: How To Identify The Software In Your Office

    297-2121-226 VINTAGE 05.01 How to identify the software in your office The Office feature record D190 lists your current BCS and the feature packages which it comprises. view similar information on screen, enter the following com- mand string at a MAP (maintenance and administration position). >PATCHER;INFORM LIST;LEAVE Datapath RS-232C data unit and V.35 data unit features con-...
  • Page 11 This section lists documents that contain information on related topics. DOCUMENT TITLE 297-1001-100 System Description 297-1001-001 Guide to Northern Telecom Practices 297-1001-825 Glossary of Terms and Abbreviations 297-1001-300 Basic Administration Procedures 297-1001-451 Customer Data Schema 297-1001-455 The Office Parameters Reference Manual...
  • Page 12 297-2121-226 VINTAGE 05.01 DOCUMENT TITLE 297-1001-821 Menu Commands Reference Manual...

  • Page 13: Chapter 2: Understanding Datapath Data Units

    297-2121-226 VINTAGE 05.01 CHAPTER 2 UNDERSTANDING DATAPATH DATA UNITS...
  • Page 14 297-2121-226 VINTAGE 05.01...

  • Page 15: Data Unit Capabilities

    297-2121-226 VINTAGE 05.01 This chapter outlines the capabilities of a data unit (DU) briefly describes DU configurations. DATA UNIT CAPABILITIES DU provides an interface between data terminal equipment (DTE) and a two-wire non-loaded loop. Data is transmitted on the two- wire loop using...

  • Page 16: Typical Non-Switched Configuration

    297-2121-226 VINTAGE 05.01 DMS-100 RS-232C or V.35 2-wire loop RS-232C or V.35 2-wire loop Main Frame RS-232C or V.35 2-wire loop Figure 2.1 Typical Switched Configuration non-switched (back-to-back) configuration, DUs are directly connected on a single two-wire loop (see Figure 2.2). RS-232C RS-232C or V.35...

  • Page 17: Call Path Restoration

    297-2121-226 VINTAGE 05.01 CALL PATH RESTORATION In a switched configuration, if you assign the Call Path Restora- tion (CPR) feature data line of an associated data unit (DU), the data unit re-establishes any calls that inadvert- ently disconnected. This feature and the Virtual Private Line (VPL) option (see Para- graph: Virtual Private Line on page 3-22) can be useful for such applications as:...
  • Page 18 297-2121-226 VINTAGE 05.01...

  • Page 19: Chapter 3: Descriptions And Specifications

    297-2121-226 VINTAGE 05.01 CHAPTER 3 DESCRIPTIONS AND SPECIFICATIONS...
  • Page 20 297-2121-226 VINTAGE 05.01...
  • Page 21 297-2121-226 VINTAGE 05.01 This chapter provides detailed descriptions specifications for the following data units (DUs): Desktop DUs Rackmount DUs RS-232C V.35 RS-232C V.35 NT4X25AA NT4X25AE NT4X25AD NT4X25AV NT4X25AF NT4X25AG NT4X25CH NT4X25AH NT4X25AK NT4X25DF * NT4X25AN NT4X25AP NT4X25AX NT4X25AZ * Change kit NT4X25AY (must be ordered separately) upgrades the NT4X25AN DU to the NT4X25AZ DU.

  • Page 22: Desktop Data Unit Description

    297-2121-226 VINTAGE 05.01 DESKTOP DATA UNIT DESCRIPTION The controls and indicators on the front panel of the desktop DUs described in this section are illustrated in Figure 3.1 page 3-3, Figure 3.2 page 3-4, Figure 3.3 page 3-5 and Figure 3.4 on page 3-6.

  • Page 23: Nt4X25Aa /An /Ax /Az

    297-2121-226 VINTAGE 05.01 async (auto) sync 19200 1200 9600 2400 4800 4800 2400 > 9600 1200 19200 power release speed call under test ring auto again dial volume source connect volume down Note: The speed selector and option switches are under a flip-up lid.

  • Page 24: Nt4X25Ae /Ap - V.35 Desktop Data Unit

    297-2121-226 VINTAGE 05.01 sync > 48000 56000 64000 power release speed call under test ring auto again dial volume source connect volume down Note: The speed selector and option switches are under a flip-up lid. Figure 3.2 NT4X25AE /AP - V.35 Desktop Data Unit...

  • Page 25: Nt4X25Af/Ah Rs-232C Desktop Data Unit

    297-2121-226 VINTAGE 05.01 ALTERNATE OPTIONS 0 MODE OPTIONS ALTERNATE OPTIONS 1SPEED SETTING NUMBER OPTION INDICATORS Power Call Under Ring Auto Test Again Dial Alter- nate source Connect Set- tings Note: The option LEDs are located under a flip-up lid. Figure 3.3 NT4X25AF/AH RS-232C Desktop Data Unit...

  • Page 26: Nt4X25Ag/Ak V.35 Desktop Data Unit

    297-2121-226 VINTAGE 05.01 SETTING MODE NUMBER OPTIONS ALTERNATE OPTIONS 1SPEED OPTION INDICATORS Power Call Under Ring Auto Test Again Dial Alter- nate source Connect Set- tings Note: The option LEDs are located under a flip-up lid. Figure 3.4 NT4X25AG/AK V.35 Desktop Data Unit...
  • Page 27 297-2121-226 VINTAGE 05.01 Desktop DUs provide an interface between data terminal equipment (DTE) and a two-wire non-loaded loop. Data is transmitted on the loop using time compression multiplexing (TCM). The TCM technol- ogy provides a data channel that is capable of handling data at a rate of 64 kbps with an 8 kbps signaling channel.

  • Page 28: Nt4X25Aa /Ae /An /Ap /Ax /Az - Rear View

    The Teladapt jack closest to the DB-25 or V.35 connector connects to the two-wire loop (data line). voice line been installed by the operating company, the Teladapt jack closest to the power cord is used to connect a telephone. * TELADAPT is a trademark of Northern Telecom...

  • Page 29: Nt4X25Af /Ag /Ah /Ak - Rear View

    297-2121-226 VINTAGE 05.01 Teladapt connector Teladapt connector for telephone for data line / ..\ / .... \ power cord RS-232C or V.35 interface for in-line power supply Figure 3.6 NT4X25AF /AG /AH /AK - Rear View Each desktop DU has LEDs (light emitting diodes) that indicate...

  • Page 30: Dte Connector Pinout

    297-2121-226 VINTAGE 05.01 DB-25 V.35 CCITT Schematic Signal Circuits Label EGND 103A 104A RSLD +12 test -12 test SCRB 115B 103B SCTB 114B SCTA 114A 104B SCRA 115A 108.2 CSTEB 113B CSTEA 113A Note: - The +12 and -12 test points are not available on the NT4X25AA /AE /AX models.

  • Page 31: Controls And Indicators (Nt4X25Aa /Ae /Af /Ag /Ah /Ak /An /Ap /Ax /Az)

    297-2121-226 VINTAGE 05.01 Controls and Indicators (NT4X25AA /AE /AF /AG /AH /AK /AN /AP /AX /AZ) The controls and indicator LEDs described this section located the front panel of the DU. Table 3.1 lists the con- trols and indicators found on each data unit model. details how to use the controls and indicators described in this sec- tion, consult the user guide supplied with the DU.
  • Page 32 297-2121-226 VINTAGE 05.01 Power LED: The Power LED provides an indication of power and synchronization with the DLC (switched configuration) or another DU (non-switched configuration). When power is supplied to the DU and there is no synchronization with the DLC or another flashes.
  • Page 33 297-2121-226 VINTAGE 05.01 Speed Call key and LED: Speed Call feature automatically dials one of the directory numbers stored in memory. The Speed Call key activates the fea- ture allows dial the desired speed call code from either the short or long list of directory numbers. This feature is provided by the DMS-100 Family switch.

  • Page 34: Desktop Data Unit Options

    297-2121-226 VINTAGE 05.01 Spare Feature key and LED: The spare feature key and LED can be assigned to any DMS-100 Fam- ily switch feature, such as Make Set Busy, using Service Orders. This feature is provided by the DMS-100 Family Switch. TABLE 3.2 DESKTOP DATA UNIT OPTIONS PEC SUFFIX...

  • Page 35: Aa Ae Af Ag Ah Ak An Ap Ax Az

    297-2121-226 VINTAGE 05.01 TABLE 3.2 (Continued) DESKTOP DATA UNIT OPTIONS PEC SUFFIX OPTIONS Synch Asynch Autobaud Local CTS Delay CTS Delay A CTS Delay B Assert CD Keyboard Dial Protocol 1 Keyboard Dial Protocol 2 Tip & Ring Loop Synch Auto Call Character Oriented Synch Auto Call Bit Oriented...

  • Page 36: Assert Rts/Normal

    297-2121-226 VINTAGE 05.01 Assert RTS/Normal: When the Assert RTS (request to send) option is selected, the DU assumes that the RS-232C RTS signal from the DTE always Select Assert RTS option when the user does not require the DTE to control the RTS signal. When the Assert RTS option is not selected (Normal), the DTE controls the RTS signal to the DU.

  • Page 37: Mi Pulse/Mi Level And Mi Invert/Normal Settings

    297-2121-226 VINTAGE 05.01 switch MI Pulse/ MI Level MI Invert/ MI and MIC leads are MI and MIC leads are shorted for 2.5 sec shorted for the when a call occurs. duration of the call. Normal MI and MIC leads are * MI and MIC leads are open for 2.5 sec open for the...

  • Page 38: Auto Ans/Man Ans

    297-2121-226 VINTAGE 05.01 far-end DTE transmission by using an EIA leads arrangement that non-standard with respect to the RS-232C specification. The non-standard arrangement lets the host computer send flow-control signals across the data connection. Set the switch to Switch B to select the non-standard flow-control method.

  • Page 39: Far-End Loop/Normal

    297-2121-226 VINTAGE 05.01 Far-end Loop/Normal: This option selects either normal operation or a far-end loopback test. When the Far-end Loop option is selected, and a call is placed to another DU, the integrity of the end-to-end data chan- is checked. When activated, the near-end DU tells the far- end DU to loop back data at the RS-232C interface.

  • Page 40: Data Speed

    297-2121-226 VINTAGE 05.01 Data Speed: Data Speed option is used to select the data transmission speed of the data call. Synch/Asynch/Autobaud: This option is used to select the transmission mode, either syn- chronous, asynchronous, or autobaud where the data unit automat- ically adjusts to the asynchronous speed of the terminal.

  • Page 41: Nt4X25Af /Ah Switch Settings For Cts Delay

    297-2121-226 VINTAGE 05.01 Option Settings Local CTS Delay CTS Delay A CTS Delay B CTS Delay(ms) 10 * n ** minimum 50 minimum 100 minimum 150 * represents an approximate time dependent upon current processor activity. (range 5 - 15 ms) ** n represents the actual end-to-end delay time of the CTS signal returned from the far-end DU.

  • Page 42: Tip & Ring Loop

    297-2121-226 VINTAGE 05.01 Keyboard Dialing Protocol 2: (NT4X25AF /AH) This option selects Hayes-compatible protocol for keyboard dialing. Tip-and-ring Loop: (NT4X25AF /AG /AH /AK) When the tip-and-ring loop option is selected, the DU is isolated from the loop and data is looped back at the Tip and Ring leads, toward the DTE.

  • Page 43: Internal Options (Nt4X25Aa /Ae /Af /Ag /Ah /Ak /An /Ap /Ax /Az)

    297-2121-226 VINTAGE 05.01 you turn the data unit from off to on you toggle the Assert DTR switch from off to on you press the DN key after a DU self-test has completed The data call can only be disconnected from calling data...

  • Page 44: Desktop Data Unit Specifications

    297-2121-226 VINTAGE 05.01 this option to the Switched position. When the DU is connected directly to another DU in a non-switched configuration, set this option the Non-Switched position. This option is preset to Switched. DESKTOP DATA UNIT SPECIFICATIONS Mechanical Specifications size 12.5 in (32 cm) long 7.5 in (19 cm) wide...

  • Page 45: Environmental Specifications

    297-2121-226 VINTAGE 05.01 (AF /AG /AH /AK) with call drop or permanent damage Environmental Specifications Operating Temperature 32 to 122 F (0 to 50 C) Storage Temperature -40 to 158 F (-40 to 70 C) Relative Humidity (operating) 95% non-condensing at 104 F (40 C) MTBF...

  • Page 46: Rackmount Data Unit Description

    297-2121-226 VINTAGE 05.01 RACKMOUNT DATA UNIT DESCRIPTION The rackmount DUs described in this section illustrated Figure 3.10. Under Tst Connect Busy Self Tst Loc Loop Figure 3.10 NT4X25AD /AV /CH /DF Rackmount DU - Front View 3-26...
  • Page 47 297-2121-226 VINTAGE 05.01 Rackmount provide an interface between data terminal equip- ment (DTE) and a two-wire non-loaded loop. Data is transmitted loop using time compression multiplexing (TCM). The TCM technology provides a data channel that is capable handling data at a rate of 64 kbps with an 8 kbps signaling channel. RS-232C rackmount DUs can transmit data up to 19.2 kbps in...
  • Page 48 297-2121-226 VINTAGE 05.01 of circuits is required. Since the DUs are not readily accessi- ble to the user, they are not equipped with speakers or keypads. Data unit options are selected by setting DIP switches located on circuit card. Each DU is factory-set for a switched/slave configuration.

  • Page 49: Controls And Indicators (Nt4X25Ad /Av /Ch /Df)

    297-2121-226 VINTAGE 05.01 Controls and Indicators (NT4X25AD /AV /CH /DF) controls and indicator LEDs described in this section apply to NT4X25AD /AV /CH /DF DUs. Power LED: The Power (Pwr) LED provides an indication of ac power syn- chronization with the DLC or another DU. When power is supplied to the DU and there is no synchronization with the DLC or another DU, the LED flashes.
  • Page 50 297-2121-226 VINTAGE 05.01 Local Loop: This toggle switch, labeled Loc Loop, selects either normal oper- ation or a local loopback (loop) test. When this switch Loop position, the DU is set for normal operation. When the switch is in to Loc Loop position, the integrity of connection is checked.

  • Page 51: Options (Nt4X25Ad /Av /Ch /Df)

    297-2121-226 VINTAGE 05.01 Options (NT4X25AD /AV /CH /DF) The options, described in this section do not apply to all rack- mount DUs. Options available on the DUs are selectable using DIP switches. Table 3.3 lists the options available with each data unit.

  • Page 52: Auto Ans/Man Ans

    297-2121-226 VINTAGE 05.01 TABLE 3.3 (Continued) RACKMOUNT DATA UNIT OPTIONS PEC SUFFIX OPTIONS Master/Slave Switched/Non-Switched Modem Pool/Normal MI Pulse/MI Level MI Invert/Normal KBD Enable/Disable Assert CD/Off Switch B/Normal Local CTS Delay/End-to-end Delay CTS Delay A On/Off CTS Delay B On/Off V.54 Interface Enable/Disable Auto Ans/Man Ans: This switch (number 1 on SW2) selects the method by...

  • Page 53: Far-End Loop/Normal

    297-2121-226 VINTAGE 05.01 Far-end Loop/Normal: This switch (number 3 on SW2) selects either normal operation far-end loopback test. When this switch is set to Normal, the DU is set for normal operation. When the switch is set Far- end Loop and a call is placed to another DU, the integrity of the end-to-end data channel is checked by using test equipment or by entering characters from the DTE.

  • Page 54: Assert Rts/Normal

    297-2121-226 VINTAGE 05.01 switch to Normal the DTE controls the DTR signal to the Assert RTS/Normal: When this switch (number 8 on SW2) is set to Assert RTS (request send), provides the RS-232C RTS signal for the DTE. Set this option to Assert RTS when the user does not require control the RTS signal.
  • Page 55 297-2121-226 VINTAGE 05.01 V.54 Interface Enable/Disable: (NT4X25AV /CH) This option provides normal operation or V.54 external testing. When this switch (ganged) is in the Disable position, V.54 test- disabled and the data unit operates normally. When this switch is set to the Enable position, the test indicator output DTE and the loopback signal inputs from the DTE are ena-...

  • Page 56: Mi Pulse/Mi Level And Mi Invert/Normal Settings

    297-2121-226 VINTAGE 05.01 switch MI Pulse/ MI Level MI Invert/ MI and MIC leads are MI and MIC leads are shorted for 2.5 sec shorted for the when a call occurs. duration of the call. Normal MI and MIC leads are * MI and MIC leads are open for 2.5 sec open for the...
  • Page 57 297-2121-226 VINTAGE 05.01 non-standard flow-control method. For the non-standard mode to operate correctly both the near-end and far-end DU’s must set to the Switch B position. flow-control mode cannot be used in a half-duplex application. A DU set to flow control mode cannot used with modem pooling.

  • Page 58: Nt4X25Ch Switch Settings For Modem Pool Cts Delay

    297-2121-226 VINTAGE 05.01 SW4 Settings for positions 6, 7, and 8 Delay A Delay B CTS Delay position 6 position 7 position 8 milli seconds Local CTS 17 * Local CTS Local CTS Local CTS End-to-End n ** End-to-End minimum 50 End-to-End minimum 100 End-to-End...

  • Page 59: Rackmount Du Option Switches

    297-2121-226 VINTAGE 05.01 DIP SW2 Applicable PECs Auto Ans Man Ans Auto Orig Man Orig Far-end Loop Normal T-and-R Loop Normal NT4X25AD /CH /AV Ext Clock Int Clock Adaptive Normal Assert DTR Normal Assert RTS Normal DIP SW3 Baud Baud NT4X25AD /CH /AV Baud Baud...

  • Page 60: Rackmount Data Unit Specifications

    297-2121-226 VINTAGE 05.01 RACKMOUNT DATA UNIT SPECIFICATIONS following specifications apply to NT4X25AD /CH /AV rackmount data units unless otherwise specified. Mechanical Specifications faceplate size 8.75 in (21.5 cm) high 0.8 in (2 cm) wide circuit card size 12.25 in (31 cm) long 6.8 in (17 cm) wide connectors backplane connector...

  • Page 61: Shelf And Power Supply Description

    297-2121-226 VINTAGE 05.01 Data units are CSA (Canadian Standards Association) approved and UL (Underwriters Laboratories) listed. SHELF AND POWER SUPPLY DESCRIPTION Shelf - NT4X25BH or NT4X25DH The rackmount DU equipment shelf (NT4X25BH or NT4X25DH) fits into a standard 19 in (48.3 cm) rack (frame). The shelf accommodates rackmount...

  • Page 62: C0 And C1 Connector Pinout

    297-2121-226 VINTAGE 05.01 connects to the DTE interface. The pinout configuration for the DTE connectors are shown in Figure 3.7 on page 3-10. pinout of the C0 connector is shown in Figure 3.15 on page 3-42. C0 lead C1 lead C0 lead C1 lead T1.1...

  • Page 63: Power Supply

    297-2121-226 VINTAGE 05.01 for modem pool data lines 110 V ac connections - not 50-pin telephone connector used for standard connector (see note) installations GND PC O < copper lugs Ter- o o o o o o o o o o o o o o o o MIC 1 minal >o o o o o o o o o o o o o o o o...

  • Page 64: Shelf Specifications (Nt4X25Bh/Dh)

    297-2121-226 VINTAGE 05.01 NT4X25DL) to protect against overload. There is a power indica- face of the supply to indicate the presence of power. Follow the instructions provided in Chapter 4 of this document to install the power supply. SHELF SPECIFICATIONS (NT4X25BH/DH) The product equipment code (PEC) for the shelf is NT4X25DH.

  • Page 65: Power Supply Specifications - Nt4X2554

    297-2121-226 VINTAGE 05.01 POWER SUPPLY SPECIFICATIONS - NT4X2554 Mechanical Specifications size 12.25 in (31 cm) long 8.75 in (21.5 cm) high at the faceplate connectors backplane connector Electrical Specifications AC inputs 110 V ac nominal (92 to 130 V ac) outputs +5 V dc @ 50 A +12 V dc @ 5 A...

  • Page 66: Power Supply Specifications - Nt4X25Dk

    297-2121-226 VINTAGE 05.01 POWER SUPPLY SPECIFICATIONS - NT4X25DK Mechanical Specifications Mounting dimensions 6.80 X 12.10 X 3.05 inches (172.72 307.34 X 77.47 mm) Weight 4.0 lbs. (1.9 kg) Output connection: 2 X 18 Dupont Female Edge Connector Electrical Specifications AC inputs 110 V ac nominal (95 to 135 V ac) outputs +5 V dc @ 20 A...

  • Page 67: Power Supply Specifications - Nt4X25Dl

    297-2121-226 VINTAGE 05.01 POWER SUPPLY SPECIFICATIONS - NT4X25DL Mechanical Specifications Mounting dimensions 6.80 X 12.10 X 3.05 inches (172.72 307.34 X 77.47 mm) Weight 4.0 lbs. (1.9 kg) Output connection: 2 X 18 Dupont Female Edge Connector Electrical Specifications DC input -43 to -56 V dc (-48V dc nominal) outputs +5 V dc @ 20 A...

  • Page 68: Call Path Restoration

    297-2121-226 VINTAGE 05.01 CALL PATH RESTORATION The Call Path Restoration (CPR) feature re-establishes a datapath call when a call is inadvertently disconnected. The DMS audit process re-originates calls that are idle state. The audit process runs every five minutes and scans the datapath lines with the CPR feature.

  • Page 69: Removing The Cpr Feature

    297-2121-226 VINTAGE 05.01 >SERVORD (CR) >ADO (CR) SONUMBER: NOW 89 > (CR) DN_OR_LEN: >1 0 10 12 (CR) OPTKEY: >1 (cr) OPTION: >CPR (CR) CPRDN: >7224001 (CR) (note) OPTKEY: >$ (CR) Note: Use only a maximum of 15 digits for the DPRDN. Do not use symbols such as * and #.
  • Page 70 297-2121-226 VINTAGE 05.01...

  • Page 71: Chapter 4: Data Unit Installation

    297-2121-226 VINTAGE 05.01 CHAPTER 4 DATA UNIT INSTALLATION...
  • Page 72 297-2121-226 VINTAGE 05.01...

  • Page 73: Desktop Data Unit Installation

    297-2121-226 VINTAGE 05.01 This chapter provides installation instructions for rackmount and desktop data units (DUs). This chapter assumes that the required data lines (and optional voice lines) have been properly installed and datafilled operating company. result procedure this chapter is not as expected, refer to Chapter 6 on page 6-1.
  • Page 74 297-2121-226 VINTAGE 05.01 Hold the DU facedown and unfasten the six screws. Turn faceup, then remove the top cover. The screws will not fall out when the unit is turned over. Figure 4.1 on page 4-3 shows the location of configura- tion switches...

  • Page 75: Desktop Du - Sw1 And Sw2 Configuration Switch Locations

    297-2121-226 VINTAGE 05.01 NT4X25AA /AE /AX layout power cord phone jack front data line jack DB-25 or V.35 connector NT4X25AN /AF /AG /AH /AK /AP /AZ layout power cord phone jack front data line jack DB-25 or V.35 connector Figure 4.1 Desktop Configuration Switch...
  • Page 76 297-2121-226 VINTAGE 05.01 < Slave < Master Not used Not Used Switched Non-Switched Master Slave SIG GND SIG GND Connected Isolated Switched Configuration Non-Switched Configuration SW1 - Slave (down) SW1 - one DU set to Slave - one DU set to Master SW2-1 - SIG GND Isolated (OFF) SW2-1 - SIG GND Isolated (OFF) SW2-2 - Slave (OFF)

  • Page 77: Making The Connections To The Du

    297-2121-226 VINTAGE 05.01 Making the Connections to the DU The connectors for this procedure are illustrated in Figure 4.3. data line telephone \ .... / \ ../ DB-25 or V.35 connector for interface to DTE in-line power supply 110 V ac plug Figure 4.3 Desktop DU Connections - Rear View...

  • Page 78: Setting The Options (Nt4X25Aa /Ae /An /Ap /Ax /Az)

    297-2121-226 VINTAGE 05.01 Note that, non-switched configuration, the power LED continues to flash until the second DU is connected data line. connect to the DU use an RS-232C, V.35 or V.35 adapter cable as required. Plug the DTE cable into the DB-25 or V.35 connector on the rear of the DU.

  • Page 79: Setting The Options (Nt4X25Af /Ag /Ah /Ak)

    297-2121-226 VINTAGE 05.01 If asynch autobaud is selected on the RS-232C data unit, following DTE speeds are supported: 50 bps 75 bps 110 bps 134.5 bps 150 bps 300 bps 600 bps 1200 bps 1800 bps 2000 bps 2400 bps 3600 bps 4800 bps 7200 bps...

  • Page 80: Additional Speed Settings

    297-2121-226 VINTAGE 05.01 Select the Autobaud mode option. Configure your terminal to the desired speed and start auto- baud from your terminal keyboard. To start autobaud enter a period followed by a carriage return. The data unit adjusts itself automatically. Two Speed LEDs light to indicate that a speed other than the ones listed has been selected.

  • Page 81: Rackmount Data Unit Installation (Nt4X25Ad /Ch /Av /Df)

    297-2121-226 VINTAGE 05.01 RACKMOUNT DATA UNIT INSTALLATION (NT4X25AD /CH /AV /DF) To install rackmount DUs, the following equipment is required: an installed equipment frame (rack) data unit shelf (NT4X25BH or NT4X25DH) power supply (NT4X2554, NT4X25DK, or NT4X25DL) an NT4X2591 mounting hardware kit data lines minimum rackmount...

  • Page 82: Rackmount Du - Connections To The Backplane

    297-2121-226 VINTAGE 05.01 for modem pool data lines 110 V ac connections - not 50-pin telephone connector used for standard connector (see note) installations GND PC O < copper lugs Ter- o o o o o o o o o o o o o o o o MIC 1 minal >o o o o o o o o o o o o o o o o...

  • Page 83: Installing The Rackmount Shelf Alarms

    297-2121-226 VINTAGE 05.01 by experienced power cabling personnel, avoid electrical shock, equipment damage, or service interruption. Mount shelf the frame (rack) using machine screws. The shelf is a standard 44.8 cm width. If the rack is wider than 48.36 cm, use P0686254 adapter brackets included in the NT4X2591 mounting hardware kit to extend width shelf as required.

  • Page 84: Connecting Data Lines To The Shelf

    297-2121-226 VINTAGE 05.01 Pin 3 Alarm 2 - normally closed (NC) Pin 4 Alarm 2 - normally open (NO) Pin 5 Ground Pin 6 Alarm 1 - common Pin 7 Alarm 2 - common Pin 8 not used Pin 9 not used Both modes (NO or NC) of alarm circuit 2 can be enabled or disa-...

  • Page 85: Setting The Options

    297-2121-226 VINTAGE 05.01 When DUs are installed in a non-switched configuration, one DU must be set for non-switched/slave, and the other must be for non-switched/master. is necessary to change the factory setting of the config- uration switches, set SW1, SW3-7 and SW3-8 to the required posi- tion as shown in Figure 4.6 on page 4-14.

  • Page 86: Rackmount Du - Configuration Switch Settings

    297-2121-226 VINTAGE 05.01 NT4X25AD /AV /CH layout < slave (toward top edge) < master < Fuse 3, 12V 500 mA < Fuse 2, 12V 500 mA < Fuse 1, 5V 2A backplane connector SW8 only on NT4X25AV /CH SW4 only on NT4X25 AD /CH /DF Switched Configuration Non-Switched Configuration - slave...

  • Page 87: Rackmount Du Option Switches

    297-2121-226 VINTAGE 05.01 DIP SW2 Applicable PECs Auto ans Man ans Auto orig Man orig Far-end loop Normal T and R loop Normal NT4X25AD /CH /AV Ext clock Int clock Adaptive Normal Assert DTR Normal Assert RTS Normal DIP SW3 Baud Baud NT4X25AD /CH /AV...

  • Page 88: Rackmount Du - Baud Rate Switch Settings

    297-2121-226 VINTAGE 05.01 NT4X25AD /CH Mode Baud Rate async async 1200 async 2400 async 4800 async 9600 async 19200 async autobaud sync 1200 sync 2400 sync 4800 sync 9600 sync 19200 NT4X25AV Mode Baud Rate sync 48000 sync 56000 sync 64000 Figure 4.8 Rackmount DU - Baud Rate Switch Settings...

  • Page 89: Chapter 5: Verifying Operation

    297-2121-226 VINTAGE 05.01 CHAPTER 5 VERIFYING OPERATION...
  • Page 90 297-2121-226 VINTAGE 05.01...

  • Page 91: Status Indicator Leds

    297-2121-226 VINTAGE 05.01 This chapter provides information for the installation and main- tenance personnel to verify the operation of the data unit (DU). a problem is reported, these procedures can also be used as a quick check of the DU’s integrity, prior to more detailed trou- bleshooting.

  • Page 92: Status Indicator Chart

    297-2121-226 VINTAGE 05.01 Status Indicator Chart State Meaning Power Power is not being supplied to the DU. (Pwr) flash Power is being supplied but the DU is not synchronized with the DMS-100 Family switch. (In a non-switched configuration, the DU is not connected to another DU). Power is being supplied, and the DU is synchronized with the DMS-100 Family Switch.

  • Page 93: Desktop Du (Nt4X25Aa /Ae /Af /Ag /Ah /Ak /An /Ap /Ax /Az)

    297-2121-226 VINTAGE 05.01 DESKTOP DU (NT4X25AA /AE /AF /AG /AH /AK /AN /AP /AX /AZ) Self-test self-test is performed automatically upon power-up, or can be initiated manually. If a call is in progress when a self-test is performed, the call is dropped. To Perform a Manual Self-test on the DU: (NT4X25AA /AE /AX /AZ)

  • Page 94: Switched Configuration Verification

    297-2121-226 VINTAGE 05.01 Press 2 on DU numerical keypad. The Self-test LED lights. Press Settings key again. The Settings LED turns off. The Under Test Led on the DU faceplate lights and a beep heard. data unit passes the test, all the LEDs light momen- tarily.
  • Page 95 297-2121-226 VINTAGE 05.01 tip and ring loopback Note: tip and ring loopback test is only available on the NT4X25AF /AG /AH /AK data units. Operating company personnel can also perform a CO loopback test on the DU as outlined in 297-2101-516, Line Maintenance Reference Manual.
  • Page 96 297-2121-226 VINTAGE 05.01 Press the Alternate key. The Alternate LED turns off. To Perform a Local Loopback Test: (NT4X25AG /AK) Press the Settings key. The Settings LED lights. Press the Alternate key. The Alternate LED lights. Press numeric keypad. The Local Loop LED lights.
  • Page 97 297-2121-226 VINTAGE 05.01 To Perform a Far-end Loopback Test: (NT4X25AF /AH) Press the Settings key. The Settings LED lights. Press the Alternate key. The Alternate LED lights. Press the 0 on the numeric keypad until the Far-end Loopback LED lights. Press Settings key.
  • Page 98 297-2121-226 VINTAGE 05.01 10. Press the Settings key. The Settings and Under Test LEDs turn off. 11. Press the Alternate key. The Alternate LEDs turn off. To Perform a Tip-and-ring Loopback Test: (NT4X25AF /AH) Press the Settings key. The Settings LED lights. Press the Alternate key.

  • Page 99: Non-Switched Configuration Verification

    297-2121-226 VINTAGE 05.01 Press the Alternate key. The Alternate LED turns off. Non-Switched Configuration Verification In a non-switched configuration two DUs are connected directly to each other without going through the DMS-100 Family switch. To verify the operation of a DU in a non-switched configuration, ensure that...

  • Page 100: Switched Configuration Verification

    297-2121-226 VINTAGE 05.01 Switched Configuration Verification Loopback Tests (NT4X25AD /CH /AV /DF) There are three loopback tests: local loopback tip-and-ring loopback far-end loopback local loopback test checks the terminal-to-DU connection. The DU loops back data at the RS-232C interface towards the DTE.
  • Page 101 297-2121-226 VINTAGE 05.01 To perform a tip-and-ring loopback test, unplug the from backplane in order to gain access to SW2. Set SW2-4 ON. (T-and-R Loop position) as shown in Figure 4.7 on page 4-15. Plug the DU into the backplane. A power-up self-test is per- formed on the DU.

  • Page 102: Non-Switched Configuration Verification (Nt4X25Ad /Ch /Av /Df)

    297-2121-226 VINTAGE 05.01 Type a string of characters on the keyboard. typed characters are echoed back to the terminal, the end-to- end channel is good. Disconnect the call. Unplug DU from the backplane and return switch SW2-3 to the OFF position (Normal position). Plug the DU into the backplane.

  • Page 103: Chapter 6: Troubleshooting

    297-2121-226 VINTAGE 05.01 CHAPTER 6 TROUBLESHOOTING...
  • Page 104 297-2121-226 VINTAGE 05.01...

  • Page 105: Status Indicators

    297-2121-226 VINTAGE 05.01 This chapter describes some of the problems encounter with data units either during installation or during normal operation. For each problem, a series of corrective actions suggested. Before following some of these actions, you may want to perform the diagnostic tests outlined in Chapter page 5-1.

  • Page 106: Failures Indicated By Status Leds

    297-2121-226 VINTAGE 05.01 Status Indicator Chart State Meaning Power Power is not being supplied to the DU. (Pwr) flash Power is being supplied but the DU is not synchronized with the DMS-100 Family switch. (In a non-switched configuration, the DU is not connected to another DU). Power is being supplied, and the DU is synchronized with the DMS-100 Family Switch.

  • Page 107: Troubleshooting

    297-2121-226 VINTAGE 05.01 TROUBLESHOOTING TABLE 6.1 DATA UNIT TROUBLESHOOTING SYMPTOM PROBLEM ACTION Power DU power is not Connect DU power supply is off on a DU. connected cord to 110 V ac outlet. (desktop). DU power is not Plug into backplane connected and turn power supply on.
  • Page 108 297-2121-226 VINTAGE 05.01 TABLE 6.1 (Continued) DATA UNIT TROUBLESHOOTING SYMPTOM PROBLEM ACTION Check that data line is properly connected. (Desktop) When DTR is not pro- Turn DTE on. key is vided pressed, the DN Check RS-232/V.35 con- turns nection. reorder tone is heard.
  • Page 109 297-2121-226 VINTAGE 05.01 TABLE 6.1 (Continued) DATA UNIT TROUBLESHOOTING SYMPTOM PROBLEM ACTION rackmount DUs see Setting Options page 4-13). Turn the DTE power on and check that it is properly connected to the DU. keyboard Incorrect Set the KBD enable option dialing prompt option...
  • Page 110 297-2121-226 VINTAGE 05.01 TABLE 6.1 (Continued) DATA UNIT TROUBLESHOOTING SYMPTOM PROBLEM ACTION mount DUs see Setting the Options on page 4-13). Both Set one internal set to external clock. (For desktop DUs clock. see Setting Options (NT4X25AA /AE /AN /AP /AX /AZ) on page 4-6 and Set- ting Options...
  • Page 111 297-2121-226 VINTAGE 05.01 TABLE 6.1 (Continued) DATA UNIT TROUBLESHOOTING SYMPTOM PROBLEM ACTION Garbled charac- Incorrect oper- Make sure both DU and DTE ters ating parame- are set to the same speed screen. ters between DU and mode. and DTE. Report the problem to the operating company.
  • Page 112 297-2121-226 VINTAGE 05.01...
  • Page 113 297-2121-226 VINTAGE 05.01 CHAPTER 7 GLOSSARY...
  • Page 114 297-2121-226 VINTAGE 05.01...
  • Page 115 297-2121-226 VINTAGE 05.01 This chapter provides definitions for terms and abbreviations that are relevant to Datapath data units. Many terms and abbre- viations are included that are not exclusive to Datapath or DMS- 100, but provide a better understanding information this manual.
  • Page 116 297-2121-226 VINTAGE 05.01 Clear To Send Data Line Card (DLC) The line card that interfaces a Data- path loop to a Data Unit. It is part a line subgroup in a Line Concen- trating Module. Datapath An end-to-end digital data service that includes a data unit and a two-...
  • Page 117 3 test condition. Mode Indicator MTBF Mean Time Between Failures Numbering Plan Area Northern Telecom Practice Power Distribution Center Request To Send Switch Time Compression Multiplexing DCE/DTE interface lead used to indi- cate a test condition.

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