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ADTRAN DSU III ARdc User Manual

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DSU III ARdc
Data Service Unit
USER MANUAL
61200270L1-1A
September 1998

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  • Page 1 DSU III ARdc Data Service Unit USER MANUAL 61200270L1-1A September 1998...
  • Page 2 Trademark: Hayes is a registered trademark of Hayes Microcomputer Products, Inc. 901 Explorer Boulevard P.O. Box 140000 Huntsville, AL 35814-4000 Phone: (256) 963-8000 © 1998 ADTRAN, Inc. All rights reserved. Printed in USA.
  • Page 3 If experiencing difficulty with this equipment, please contact ADTRAN for repair and warranty information. The telephone company may re- quire this equipment to be disconnected from the network until the prob- lem is corrected or it is certain the equipment is not malfunctioning.
  • Page 4 Shielded cables must be used with this unit to ensure compliances with Class A FCC limits. Changes or modifications to this unit not expressly approved by ADTRAN will void the user's authority to operate the equipment. CANADIAN EMISSIONS REQUIREMENTS...
  • Page 5 CANADIAN EQUIPMENT LIMITATIONS Notice: The Canadian Industry and Science Canada label identifies certified equip- ment. This certification means that the equipment meets certain telecommunications network protective, operational, and safety requirements. The Department does not guarantee the equipment will operate to the user’s satisfaction. Before installing this equipment, ensure that it is permissible to be connected to the fa- cilities of the local telecommunications company.
  • Page 6 IMPORTANT SAFETY INSTRUCTIONS When using your telephone equipment, please follow these basic safety precautions to reduce the risk of fire, electrical shock, or personal injury: 1. Do not use this product near water, such as near a bath tub, wash bowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool.

  • Page 7: Table Of Contents

    Syntax and Possible Responses ............2-9 CIC (Connect Incoming Call) ............2-9 CNL (Configuration Local) ............2-9 CNR (Configuration Remote) ............. 2-9 Switched 56 Operation ................. 2-10 CRN (Call Request with Number) ........... 2-10 61200270L1-1 DSU III ARdc User Manual...
  • Page 8 Network Address ....................5-3 Remote Configuration ..................5-3 Network Type ..................... 5-4 Clock Source......................5-5 Chapter 6 Configuring DTE Options ..............6-1 DTE Options ........................6-1 DTE Rate ......................6-1 Connector Type ....................6-4 DSU III ARdc User Manual 61200270L1-1...
  • Page 9 Test Status Display ................... 11-2 Exiting a Test..................... 11-3 Troubleshooting ......................11-5 Messages from the DSU/CSU ................ 11-5 Troubleshooting New Installs ................ 11-7 Troubleshooting New Installs or Existing Circuits ......11-8 Local Unit diagnostics ....................11-9 61200270L1-1 DSU III ARdc User Manual...
  • Page 10 Chapter 12 Status Selection..................12-1 STATUS display ......................12-1 DSU Operational Status................... 12-2 DATA MODE ................12-2 UNIT IN TEST ................12-2 DTE COMMAND MODE............12-2 IDLE ....................12-2 INCOMING CALL ..............12-2 DIALING..................12-2 DSU III ARdc User Manual 61200270L1-1...
  • Page 11 DTE Control Leads and Status ............... 12-4 Appendix A AT Commands ................... A-1 Appendix B Default Configuration Profiles ............B-1 Appendix C DSU-to-Modem Interconnect ............C-1 Appendix D EIA-232 Connector ................D-1 Appendix E Specifications Summary ..............E-1 61200270L1-1 DSU III ARdc User Manual...
  • Page 12 Table of Contents DSU III ARdc User Manual 61200270L1-1...
  • Page 13 List of Figures Figure 1-1. Sample Point-to-Point Application for DSU III ARdc ....1-2 Figure 3-1. Example of Basic Menu Travel ............3-4 Figure 3-2. DSU III ARdc Front View..............3-4 Figure 3-3. DSU III ARdc Rear View ..............3-7 Figure 4-1.
  • Page 14 V.54 RDL with Test Pattern ............11-20 Figure 11-17. Initiating a Remote Test............... 11-20 Figure 12-1. Examples of Status Displays............12-1 Figure C-1. DSU to Modem Interconnect ............C-1 Figure D-1. EIA-232 Connector ................D-1 viii DSU III ARdc User Manual 61200270L1-1...
  • Page 15 Test AT Commands ..............11-9 Table 11-4. DTE With Test Pattern Commands .......... 11-10 Table 11-5. Remote Tests and AT Commands ..........11-19 Table A-1. AT Commands ................A-1 Table B-1. Default Configuration Profiles .............B-2 61200270L1-1 DSU III ARdc User Manual...
  • Page 16 List of Tables DSU III ARdc User Manual 61200270L1-1...

  • Page 17: Chapter 1 Introduction

    DDS or 4-wire Switched 56 networks. This unit is an all rate DSU/CSU, supporting services from 2.4 to 64 kbps including 19.2 and 38.4 kbps services. The DSU III ARdc may be used in either point-to-point or multi-point circuits.

  • Page 18: Dds Overview

    4-wire local loop service to SW56 customers. In SW56 mode the DSU III ARdc supports DTE rates of 1.2, 2.4, 4.8, 9.6, 19.2, 38.4 (async or sync) and 56 kbps (sync). An additional DTE rate of 57.6 kbps is available in async modes.

  • Page 19: Warranty And Customer Service

    Chapter 1. Introduction WARRANTY AND CUSTOMER SERVICE ADTRAN will replace or repair this product within five years from the date of shipment if it does not meet its published specifications or fails while in service. For detailed warranty, repair, and return information refer to the ADTRAN Equipment Warranty and Repair and Return Policy Procedure.
  • Page 20 Chapter 1. Introduction DSU III ARdc User Manual 61200270L1-1...

  • Page 21: Chapter 2 Installation

    ADTRAN Customer Service. If possible, keep the original shipping con- tainer for use in shipping the DSU III ARdc for repair or for verification of damage during shipment. Equipment Provided...

  • Page 22: Network Interface Connection

    NETWORK INTERFACE CONNECTION The DSU III ARdc’s eight-position modular jack (labeled TELCO) con- nects to the network when the unit is configured for either dedicated or switched operation. See Table 2-1 for the connector pin assignments.

  • Page 23: Table 2-2. Pin Assignments For Primary Eia-232 Connector

    Received Line Signal Detector (CD) +12 Test Point -12 Test Point Transmit Clock (TC) Receive Clock (RC) Local Loopback (LL) Data Terminal Ready (TR) Remote Loopback (RL) Ring Indicator (RI) External TX Clock (ETC) Test Indicator (TI) 61200270L1-1 DSU III ARdc User Manual...

  • Page 24: Configuration

    Test Indicator (TI) CONFIGURATION The DSU III ARdc contains four different user profiles (sets of configura- tions options) that are stored in read only memory. These profiles are listed in Appendix B “Default Configuration Profiles” on page B-1. The unit is shipped from the factory with profile 1 (default configuration) loaded into the nonvolatile configuration memory.

  • Page 25: Configuration Methods

    To exit the data mode and enter the command mode, the asynchronous DTE device must transmit a proper escape sequence or three pluses (+++) to the DSU III ARdc. A specified time delay must occur between the last data character and the first escape sequence character. This is the guard time delay, and it can be changed by writing a value to the S12 register.

  • Page 26: V.25 Bis Commands

    Chapter 2. Installation Once the command mode is entered, AT commands can be transmitted to the DSU III ARdc to configure most of the options or initiate tests to check both the DSU III ARdc and the network connections. All command lines must begin with the AT character et in either capital or lower case letters.

  • Page 27: Command Structure

    [V.25 bis COMMAND][CR][LF] Command Descriptions The ADTRAN V.25 bis command set is a subset of the CCITT V.25 bis command set. In addition to the CCITT commands supported, ADTRAN has added configuration commands for both local and remote DSUs. The ADTRAN V.25 bis command set follows:...
  • Page 28 Incoming call Call connected If verbose (wordy) responses are disabled (ATV0), the following list of three-character responses are the only ones returned: Valid V.25 command processed Invalid command received Call failed Incoming call Call connected DSU III ARdc User Manual 61200270L1-1...

  • Page 29: Syntax And Possible Responses

    CNL (Configuration Local) This command is used to pass AT commands to the local modem via the V.25 bis command processor. This allows the DSU III ARdc to be config- ured with AT commands via a synchronous interface. The command has the following format: CNL[LOCAL PASSWORD;]AT[ONE OR MORE AT COMMANDS]...

  • Page 30: Switched 56 Operation

    If no number is included in the command, the number stored in dial regis- ter number 1 is dialed. If no number is provided and no number is stored in dial register number 1, the DSU III ARdc responds with the call failure indication CFINS (Call Failure Indication Not Stored).

  • Page 31: Rln (Request List Of Numbers)

    The DSU responds with VAL. RLN (Request List of Numbers) This command causes the DSU III ARdc to return the number stored in the specified register. The format of this command follows: [REGISTER NUMBER] If the register number is invalid, the INVPV response is returned.
  • Page 32 Chapter 2. Installation 2-12 DSU III ARdc User Manual 61200270L1-1...

  • Page 33: Chapter 3 Operation

    Chapter 3 MENU STRUCTURE The DSU III ARdc uses a multilevel menu approach to access its many features. All menu operations are displayed in the LCD window. The opening menu is the access point for all other operations. There are four Main menu branches: Status, Test, Configuration and Dial.

  • Page 34: Test

    This menu is available for use only when AT&T/MCI SW56 or US SPRINT SW56 is the selected network type. See Chapter 10 ”Dial Selection” for more information. DSU III ARdc User Manual 61200270L1-1...

  • Page 35: Basic Menu Travel

    Chapter 3. Operation Basic Menu Travel Four function keys on the left side of the DSU III ARdc keypad allow the various menu branches to be entered, exited, and scrolled through. The four function keys are defined below. Enter Selects a displayed item.

  • Page 36: Front Panel

    5=MANUAL COMMAND Figure 3-1. Example of Basic Menu Travel FRONT PANEL The DSU III ARdc faceplate is shown in Figure 3-2. Descriptions of each part of the front panel follow the illustration: Figure 3-2. DSU III ARdc Front View LCD Window Displays menu items and messages in 2 lines by 16 characters.

  • Page 37: Up And Down Arrows

    During most operations, the Quick key returns the display to the Main menu. During a test, the Quick key returns to the top of the Test menu. In SW56 operation, if the unit is not in test, the Quick key returns to the Dial menu. 61200270L1-1 DSU III ARdc User Manual...

  • Page 38: Led Description

    Chapter 3. Operation LED Description The DSU III ARdc has seven LED indicators: RS, CS, TD, RD, CD, ALM and TST. These LEDs are identified as follows: Request to Send Clear to Send TD: Transmit Data RD: Receive Data CD: Carrier Detect...

  • Page 39: Figure 3-3. Dsu Iii Ardc Rear View

    Chapter 3. Operation Figure 3-3. DSU III ARdc Rear View Table 3-1. Identification of Numbers Number Item Function Telco Connection Connection to the dedicated circuit EIA-232 DTE interface V.35 High speed DTE interface 24 to 48 VDC Power connection Connection...
  • Page 40 Chapter 3. Operation DSU III ARdc User Manual 61200270L1-1...

  • Page 41: Chapter 4 Configuration Overview

    Chapter 4 LOCAL AND REMOTE CONFIGURATION The DSU III ARdc can be configured locally using the front panel or remotely by establishing communications with another DSU. The front panel of the local DSU can then be used to configure the remote DSU.
  • Page 42 Options” , Chapter 6 “Configuring DTE Options” , Chapter 7 “Configur- ing Test Options” , Chapter 8 “Configuring Dial Options” , and Chapter 9 “Manual Command” . A complete Configuration menu is shown in Figure 4-1. DSU III ARdc User Manual 61200270L1-1...

  • Page 43: Chapter 5 Configuring Network Options

    The Loop Rate option sets the loop operating speed. The unit should be set to the rate required by the DDS service. The DSU III ARdc also sup- ports subrate DTE data over a 56 kbps or 64 kbps loop. The loop rate must be set independently of the DTE rate.

  • Page 44: Figure 5-1. Setting Loop Rate Options

    Figure 5-1 with the equivalent AT commands that perform the same configuration functions. Table 5-1. Loop Rate Commands Front Panel AT Command 1=AUTO 2=2.4K 3=4.8K 4=9.6K 5=19.2K 6=38.4K 7=56K 8=64K clear channel DSU III ARdc User Manual 61200270L1-1...

  • Page 45: Network Address

    _N=xx Assigns a two-digit network address Remote Configuration This option sets up the DSU III ARdc to accept or reject remote configura- tion commands. Figure 5-3 shows the menu path for enabling/ disabling remote configuration. The factory default setting is ENABLED.

  • Page 46: Network Type

    Disable remote configuration 2=ENABLE &P5 Enable remote configuration Network Type This option configures the DSU III ARdc for the specific type of network being used. The factory default setting is DEDICATED (see Fig- ure 5-4). DSU III ARdc User Manual 61200270L1-1...

  • Page 47: Clock Source

    When AT&T/MCI SW56 or US SPRINT SW56 is selected, the Main menu dis- plays the DIAL selection. Clock Source The CLOCK SOURCE options specify the timing source for the DSU III ARdc’s internal circuitry. The factory default setting is FROM NET- WORK (see Figure 5-5). 61200270L1-1 DSU III ARdc User Manual...

  • Page 48: Figure 5-5. Setting The Clock Source

    Figure 5-5. Setting the Clock Source When operating on a DDS network, the timing should be FROM NET- WORK. On a point-to-point private network, one DSU III ARdc must be set for MASTER, and the other set for FROM NETWORK. Table 5-5 shows the equivalent AT commands for setting the clock source.

  • Page 49: Chapter 6 Configuring Dte Options

    DTE OPTIONS The DTE OPTIONS menu is used to select the configuration parameters that control the operation of the DSU III ARdc's DTE interface. DTE Rate The selectable DTE rates over a 56 or 64 kbps loop are shown in Figure 6- 1.

  • Page 50: Table 6-1. Dte Rate At Commands

    7=SAME AS LOOP DTE rate same as loop speed If the DSU III ARdc is set for a loop rate of 64 kbps and SAME AS LOOP is selected, then SCRAMBLER ON/OFF options are available (as shown in Figure 6-1). The factory default setting is SCRAMBLER OFF.

  • Page 51: Figure 6-2. Dte Rates For Loop Rates Of 2.4, 9.6, 19.2, And 38.4 Kbps

    The 1.2K setting is for data mode only. The unit will not respond to any in-band command modes such as AT commands or V.25 bis. If any command modes are set, they will be disabled when the 1.2K setting is selected. 61200270L1-1 DSU III ARdc User Manual...

  • Page 52: Connector Type

    2=DTE OPTIONS 3=DATA FORMAT 4=DTE CMD OPTION 1=LOCAL 5=TRANSMIT CLOCK 6=CS OPTIONS 3=CONFIG 7=ANTI-STREAM 2=REMOTE ENTER ADDRESS 8=CD OPTIONS 9=TR OPTIONS A=SR OPTIONS 3=TEST OPTIONS 4=DIAL OPTIONS 5=MANUAL COMMAND Figure 6-3. Selecting the Connector Type DSU III ARdc User Manual 61200270L1-1...

  • Page 53: Data Format

    For asynchronous options, select the length of the data bytes. 1=ASYNC 9 BITS 9 bits including start, stop, parity 2=ASYNC 10 BITS 10 bits including start, stop, parity 3=ASYNC 11 BITS 11 bits including start, stop, parity 61200270L1-1 DSU III ARdc User Manual...

  • Page 54: Dte Command Option

    V.25 SYNC selected, the DTE format is independent of the DATA FORMAT option. However, if V.25 BSC/ASYNC is selected, the unit will use V.25 BISYNC (BSC) commands for synchronous data format or V.25 ASYNC commands for asynchronous data format. DSU III ARdc User Manual 61200270L1-1...

  • Page 55: Transmit Clock

    Transmit Clock The TRANSMIT CLOCK option is used to select the source of the clock used to transfer data from the DTE to the DSU III ARdc. Figure 6-6 shows the menu path used to set the TRANSMIT CLOCK option.

  • Page 56: Cs Options

    Figure 6-7. Selecting CS Options If one of the options chosen involves request to send (RS), then the delay from RS to CS must be selected. Table 6-5 shows the AT Commands used to set the CS OPTIONS. DSU III ARdc User Manual 61200270L1-1...

  • Page 57: Table 6-5. Cs Options At Commands

    CS follows RS after delay and also off if CD off. If CD goes off after RS is on, DSU III ARdc will turn off CS but continue to pass data until RS goes off. CS also off if DSU cannot pass data.

  • Page 58: Anti-Stream

    The ANTI-STREAM option is used to select the anti-stream timeout. Fig- ure 6-8 shows the menu path used to access the ANTI-STREAM options menu. The anti-stream timeout is the maximum time the DSU III ARdc transmits data to the network from the DTE. This feature prevents one DTE device on a multi-drop network from continuously tying up the transmit circuit back to the master DSU.

  • Page 59: Figure 6-8. Anti-Stream Options

    Table 6-7. Anti-Stream AT Commands Front Description Panel Command 1=TIMER OFF Anti-stream timer disabled 2=TIME 10 SEC. Timeout equals 10 seconds 3=TIME 30 SEC. Timeout equals 30 seconds 4=TIME 60 SEC. Timeout equals 60 seconds 61200270L1-1 DSU III ARdc User Manual 6-11...

  • Page 60: Cd Options

    Table 6-8. CD Options AT Commands Front Description Panel Command 1=FORCED ON &C0 On all the time. 2=NORMAL &C1 On only when data present on loop. 3=OFF WITH LOCD &C2 On except after disconnect in Switched 56 application. 6-12 DSU III ARdc User Manual 61200270L1-1...

  • Page 61: Tr Options

    Chapter 6. Configuring DTE Options TR Options The TR OPTIONS menu is used to select the DSU III ARdc response to the data terminal ready (TR) lead. The factory default setting is IGNORED (see Figure 6-10). 1=NETWORK OPT. 1=DTE RATE...

  • Page 62: Sr Options

    1=FORCED ON 2=REMOTE ENTER ADDRESS 9=TR OPTIONS 2=OFF OOS ONLY A=SR OPTIONS 3=OFF LOCD ONLY 4=OFF TEST ONLY 5=OFF TEST +OOS 3=TEST OPTIONS 6=OFF TEST +LOCD 4=DIAL OPTIONS 5=MANUAL Figure 6-11. Setting SR Options 6-14 DSU III ARdc User Manual 61200270L1-1...

  • Page 63: Table 6-10. Sr Options At Commands

    (SW56 only). 4=OFF TEST ONLY &S0_C0 Off when unit is in test. 5=OFF TEST +OOS &S1_C0 Off in test or OOS. 6=OFF TEST +LOCD &S5 Off 5 seconds after dis- connect or test. 61200270L1-1 DSU III ARdc User Manual 6-15...
  • Page 64 Chapter 6. Configuring DTE Options 6-16 DSU III ARdc User Manual 61200270L1-1...

  • Page 65: Chapter 7 Configuring Test Options

    Test Timeout The TEST TIMEOUT option sets the length of time a DSU III ARdc remains in a test mode before automatically returning to the data mode. Enter the timeout from 0 to 255 seconds. The factory default setting is off (0).

  • Page 66: Remote Digital Loopback

    Remote Digital Loopback The RDL (Remote Digital Loopback) option specifies whether or not the DSU III ARdc responds to an RDL request from the far end of the circuit. The factory default setting is RDL ACCEPTED. Figure 7-2 shows the menu path used to access this option.

  • Page 67: Eia Remote Loopback

    EIA Remote Loopback The EIA RLB (Electronics Industries Association Remote Loopback) option specifies whether or not the DSU III ARdc responds to the RLB input from the DTE. The factory default setting is DISABLED. Figure 7-4 shows the menu path for the EIA RLB options.

  • Page 68: Figure 7-4. Eia Remote Loopback Options

    Figure 7-4. EIA Remote Loopback Options Table 7-4 shows the equivalent AT commands for setting the EIA RLB options. Table 7-4. EIA Remote Loopback AT Commands Front Description Panel Command 1=DISABLED EIA RLB disabled 2=ENABLED EIA RLB enabled DSU III ARdc User Manual 61200270L1-1...

  • Page 69: Chapter 8 Configuring Dial Options

    Switched 56 operation. Phone Number The DSU III ARdc stores up to ten numbers of 36 digits each. Edit a phone number by re-entering the entire number. This process overwrites the previously stored number. Figure 8-1 shows the menu path used to access the PHONE NUMBER option.

  • Page 70: Auto Answer

    The AUTO ANSWER option is used to specify how incoming calls are to be answered. If ENABLED, incoming calls are automatically answered by the DSU III ARdc. If DISABLED, an incoming call can be answered man- ually by an AT or V.25 command from the DTE, or by raising TR from the DTE.

  • Page 71: Chapter 9 Manual Command

    MANUAL COMMAND The MANUAL COMMAND option is a shortcut method for entering configuration and control commands for the DSU III ARdc. Figure 9-1 shows the menu path for MANUAL COMMAND. The avail- able manual commands are listed in Table 9-1. When using the front panel, perform the following steps to enter a manual command: Select 3=CONFIG from the Main menu.

  • Page 72: Figure 9-1. Manual Commands

    DTR Recognize Delay (x 2.5ms) 00 to FF DTR Initiated Command Timeout 00 to FF (seconds) Load Factory Opt. Option Set #1 Option Set #2 Option Set #3 Option Set #4 Network Address Lock DSU III ARdc User Manual 61200270L1-1...
  • Page 73 Chapter 9. Manual Command Table 9-1. Manual Commands (Continued) Command Description Command Value Network Addr. Unlock Network Addr. Lock 61200270L1-1 DSU III ARdc User Manual...
  • Page 74 Chapter 9. Manual Command DSU III ARdc User Manual 61200270L1-1...

  • Page 75: Chapter 10 Dial Selection

    Figure 10-1. Dial Options Menu Dial Stored # This option allows a stored number to be dialed. The numbers are stored within the CONFIG selection. Figure 10-2 shows the menu path used to store phone numbers. 61200270L1-1 DSU III ARdc User Manual 10-1...

  • Page 76: Enter Dial

    See Chapter 8 “Configuring Dial Options” on page 8-1 for more information. Enter Dial # This option allows you to enter a phone number of up to 36 digits for the DSU III ARdc to dial. Redial Last # Selecting this option redials the last phone number entered.

  • Page 77: Chapter 11 Testing And Troubleshooting

    Chapter 11 TEST OVERVIEW The DSU III ARdc performs a variety of diagnostic functions that isolate portions of the circuit to identify the problem source. Tests may be initi- ated and terminated from the front panel or the DTE interface. In asyn- chronous mode, AT commands can control the testing from the DTE interface.

  • Page 78: Initiating A Test

    Chapter 12 “Status Selection” on page 12-1, with additional prompts for the type of test and the number of errors (for tests with a test pattern). 11-2 DSU III ARdc User Manual 61200270L1-1...

  • Page 79: Exiting A Test

    Cancel to return to the Main menu. The Exit Test/Display Status menu provides the following options, which are available only after a test has been initiated: Exit Test Exits the current test and returns to the Main menu. Display Status Re-enters test display. 61200270L1-1 DSU III ARdc User Manual 11-3...

  • Page 80: Figure 11-4. Complete Test Menu

    2=TEST 2=REMOTE UNIT ENTER TEST UNIT 3=STRESS PTRN #1 1=EXIT TEST ADDRESS:0 4=STRESS PTRN #2 STATUS DISPLAY 2=DISPLAY STATUS 5=STRESS PTRN #3 6=STRESS PTRN #4 7=DATA FROM DTE Figure 11-4. Complete Test Menu 11-4 DSU III ARdc User Manual 61200270L1-1...

  • Page 81: Troubleshooting

    Messages from the DSU/CSU The DSU III ARdc displays messages on the LCD display and LEDs con- cerning the status of the unit and the local loop. If the Alarm LED is on, one or more of the messages shown in Table 11-1 is displayed on the LCD.
  • Page 82 TEST FROM Telco activated a Telco is testing circuit. Wait until test is complete or TELCO loopback to test the contact telco service pro- DDS circuit. vider. 11-6 DSU III ARdc User Manual 61200270L1-1...

  • Page 83: Troubleshooting New Installs

    Chapter 11. Testing and Troubleshooting Troubleshooting New Installs Before initiating diagnostics on a newly installed unit and/or DDS circuit and before contacting ADTRAN Technical Support, please check the items in Table 11-2 to ensure the unit is configured properly. Table 11-2. Troubleshooting New Installs...

  • Page 84: Troubleshooting New Installs Or Existing Circuits

    DTE Only Test • Loop Only Test If the unit fails any of these tests or the problem has not been determined, contact ADTRAN Technical Support; see inside back cover of this manual. 11-8 DSU III ARdc User Manual 61200270L1-1...

  • Page 85: Local Unit Diagnostics

    Chapter 11. Testing and Troubleshooting LOCAL UNIT DIAGNOSTICS The local DSU III ARdc can perform six different tests; see Table 11-3. Table 11-3. Test AT Commands Front Description Panel Display Command DTE & Loop (LL) &T10 TD/RD and RX/TX Loopbacks Loop Only (RT) &T11...

  • Page 86: Table 11-4. Dte With Test Pattern Commands

    DTE & Loop (LL) Test Description The DTE & Loop test splits the DSU III ARdc into two separate DTE and loop interface sections and then loops the receive data of each interface back to its respective transmit data. The DTE & Loop test provides a bidi- rectional loopback at the DSU/CSU.

  • Page 87: Figure 11-5. Dte & Loop Test

    Follow the menu path outlined in Figure 11-6 to initiate a DTE & Loop Test. 1=DTE & LOOP(LL) 2=LOOP ONLY (RT) 3=DTE ONLY 4=DTE WITH TP 1=LOCAL UNIT 5=TEST PATTERN 6=SELF TEST 2=TEST 2=REMOTE UNIT Figure 11-6. Initiating a DTE & Loop Test 61200270L1-1 DSU III ARdc User Manual 11-11...

  • Page 88: Figure 11-7. Loop Only Test

    Loop Only (RT) The Loop Only (RT) test allows the loop interface and a major portion of the DTE interface for the local DSU III ARdc to be tested from the remote site over the actual communication circuit. Figure 11-7 illustrates the loopback point and the signal paths for this test.

  • Page 89: Figure 11-8. Initiating A Loop Only Test

    The DTE Only test provides a method for testing both the DTE interface drivers and receivers of the local DSU III ARdc plus its loop transmitter and receiver. For this test, the loop transmit data is connected to the loop receive data at a point close to the physical network interface.

  • Page 90: Figure 11-9. Dte Only Test Diagram

    The DTE Only test is used for the following purposes: • Verify integrity of the DTE interface. • Verify integrity of connection between DTE and DSU III ARdc. Initiating Follow the menu path outlined in Figure 11-10 to initiate a DTE Only test. 1=DTE & LOOP(LL)

  • Page 91: Figure 11-11. Dte With Test Pattern

    DSU/ CSU internal test pattern generator. This test can be used to detect defi- ciencies within the internal drivers and receivers of the DSU III ARdc. Figure 11-11 illustrates the loopback point and the data paths for this test.

  • Page 92: Figure 11-12. Initiating A Dte Test With Test Pattern

    TEST ERR display. Test Pattern The Test Pattern option converts the local DSU III ARdc into a BERT tester for the purpose of testing the DDS circuit. When this test is used, the remote DSU/CSU must be in loopback or transmitting a test pattern. Fig- ure 11-13 illustrates the data paths for this mode.

  • Page 93: Figure 11-13. Test Pattern Only

    • Helps determine from which direction the circuit is receiving errors. Initiating Follow the menu path outlined in Figure 11-14 to initiate a test using a test pattern. 61200270L1-1 DSU III ARdc User Manual 11-17...

  • Page 94: Figure 11-14. Initiating A Test Using A Test Pattern

    If the unit is functioning properly, the display should show the following: TST ERR = 00 Self Test The Self Test verifies current operation of the DSU III ARdc. It can be per- formed at any time and is recommended if there is any question about the DSU's health.

  • Page 95: Figure 11-15. Initiating A Self Test

    A pass or fail status will be displayed on the LCD along with a checksum indicating the current firmware revision. REMOTE UNIT DIAGNOSTICS A remote DSU III ARdc can perform seven different tests; see Table 11-5. Table 11-5. Remote Tests and AT Commands Front...

  • Page 96: Figure 11-16. V.54 Rdl With Test Pattern

    1=2047 PATTERN 1=LOCAL UNIT 2=511 PATTERN ENTER TEST UNIT 3=STRESS PTRN #1 2=TEST 2=REMOTE UNIT ADDRESS:0 4=STRESS PTRN #2 5=STRESS PTRN #3 6=STRESS PTRN #4 7=DATA FROM DTE Figure 11-17. Initiating a Remote Test 11-20 DSU III ARdc User Manual 61200270L1-1...
  • Page 97 If the test is successful the status menu is displayed. If not, Unable to Execute Test is displayed. Interpreting Test Results If the unit is functioning properly, the display should show: TST ERR = 00 61200270L1-1 DSU III ARdc User Manual 11-21...
  • Page 98 Chapter 11. Testing and Troubleshooting 11-22 DSU III ARdc User Manual 61200270L1-1...

  • Page 99: Figure 12-1. Examples Of Status Displays

    The STATUS selection displays two lines at a time of the current opera- tional status of the network and the DTE interfaces. After 30 seconds of no front panel operation, the DSU III ARdc automati- cally reverts to the status display. Examples of possible status displays are shown in Figure 12-1.

  • Page 100: Dds Network Status

    DDS Network Status This line of the display shows the current status of the dedicated network interface. Possible messages include: LOOP IS NORMAL The DSU is connected to the dedicated line. No line irregularity detected. 12-2 DSU III ARdc User Manual 61200270L1-1...

  • Page 101: Open Loop

    The DSU III ARdc cannot sync on the signal from the telco (64k mode only). TEST FROM TELCO The DSU III ARdc is in a test initiated from the telco. Scroll to next status menu for test type. RATE ADAPTING The DSU III ARdc is attempting to determine the loop rate provided from the telco.

  • Page 102: Call Disconnect

    Four additional DTE interface leads are displayed with their current sta- tus (on or off) displayed below them. The leads are identified as follows: TR - Data terminal ready SR - Data set ready LLB - Local loopback RLB - Remote loopback 12-4 DSU III ARdc User Manual 61200270L1-1...

  • Page 103: Appendix A At Commands

    AT Commands Appendix A Table A-1 shows the AT commands available for the DSU III ARdc. Table A-1. AT Commands Command Title Default Re-execute Command none Answer none ATDn Dial Number none Echo Command Hang Up Call none Go Online...

  • Page 104: Table A-1. At Commands

    RTS-CTS Delay AT_Fn Scrambler Control AT_Jn Auto Answer Enable/Disable AT_N=xx Set Network Address none AT_Pn Front Panel Enable/Disable AT_Rn LB Enable/Disable AT_S=xx Set Serial Number none AT_Tn Select Test Pattern AT_Xn Clock Source Select DSU III ARdc User Manual 61200270L1-1...

  • Page 105: Appendix B Default Configuration Profiles

    Appendix B DEFAULT CONFIGURATION PROFILES The DSU III ARdc contains four different user profiles (sets of configura- tions options) stored in read-only memory (see Table B-1). The unit is shipped from the factory with profile 1 loaded into the nonvolatile con- figuration memory.

  • Page 106: Table B-1. Default Configuration Profiles

    Remote DSU Address DTE Rate (56/64k loop) Same as Loop Same as Loop Same as Loop Same as Loop Scrambler Mode Connector Type V.35 EIA232 EIA232 V.35 DTE Data Format SYNC SYNC ASYNC SYNC DSU III ARdc User Manual 61200270L1-1...
  • Page 107 Test Timeout RDL En/Dis RDL Accepted RDL Accepted RDL Accepted RDL Accepted EIA Controlled LLB Disable Disable Disable Disable EIA Controlled RLB Disable Disable Disable Disable Dial Options Auto Answer Enable Enable Enable Enable 61200270L1-1 DSU III ARdc User Manual...
  • Page 108 Appendix B. Default Configuration Profiles DSU III ARdc User Manual 61200270L1-1...

  • Page 109: Appendix Cdsu-To-Modem Interconnect

    DSU-to-Modem Interconnect Appendix C MODEM TAIL CIRCUIT APPLICATION A DSU-to-modem interconnect diagram for a modem tail circuit applica- tion is shown in Figure C-1. For Multi-drop requirement: Figure C-1. DSU-to-Modem Interconnect 61200270L1-1 DSU III ARdc User Manual...
  • Page 110 Appendix C. DSU-to-Modem Interconnect DSU III ARdc User Manual 61200270L1-1...

  • Page 111: Figure D-1. Eia-232 Connector

    When creating this cable at the DTE interface EIA-232 connector, tie transmit clock lead (TC) to exter- nal transmit (ETC) as shown. DSU III ARdc Pin 15 Pin 24 (No connection) EIA-232 CONNECTOR Figure D-1. EIA-232 Connector 61200270L1-1 DSU III ARdc User Manual...

  • Page 112: Appendix D Eia-232 Connector

    Appendix D. EIA-232 Connector DSU III ARdc User Manual 61200270L1-1...

  • Page 113: Appendix E Specifications Summary

    Specifications Summary Appendix E SPECIFICATIONS AND FEATURES This section describes the standard specifications and features incorpo- rated in the DSU III ARdc. Operating Modes Dedicated DDS (point-to-point, multipoint) Switched 56 (4-wire) Data Rates Dedicated mode service rate: 2.4, 4.8, 9.6, 19.2, 38.4, 56, and 64 kbps...
  • Page 114 Loop transmission parameters as defined in: AT&T PUB 62310: Dedicated DDS AT&T PUB 41468: Switched 56 SPRINT TS 0046: Switched 56 Line Interface RJ-48S, 4-wire, full duplex Receiver Sensitivity -45 dB at all rates DSU III ARdc User Manual 61200270L1-1...
  • Page 115 Storage Temperature: -20 C to 70 C (-4 F to 158 Relative Humidity: Up to 95% noncondensing Dimensions: 2.25"H, 8.75"W, 10.25"D Weight: 3 lbs Power 24 to 48 VDC, 8 W MTBF 334,561 hours 61200270L1-1 DSU III ARdc User Manual...
  • Page 116 Appendix E. Specifications Summary DSU III ARdc User Manual 61200270L1-1...
  • Page 117 An AT&T proprietary 56/64 kbps switched digital data service offered by telco service providers and delivered to users over 4 copper wires. Compatible with the ADTRAN DSU III S4W and with the DSU III TDM 4-wire Switched 56 TDM option.
  • Page 118 (2) to provide a time base. controller card The card installed in slot 1 of an ADTRAN SMART 16 shelf, used to connect a VT 100 ter- minal or DATAMATE for configuring SMART 16 DSU/CSU products. customer premise equipment CPE.
  • Page 119 DTE to loop rate matching A feature designed into ADTRAN DSU/CSU products that allows slower DTE devices to communicate over 56/64 kbps digital circuits. Data terminal ready. A control signal sent from the DTE to the DCE that indicates the DTE is powered on and ready to communicate.
  • Page 120 The network supports diverse services through integrated access arrangements and defines a limited set of standard, multipurpose interfaces for equip- ment vendors, network providers, and customers. Interworking with a public switched telephone network is retained. Glossary-8 DSU III ARdc User Manual 61200270L1-1...
  • Page 121 ROM. A memory device which is programmed at the factory and whose contents thereaf- ter cannot be altered. remote configuration A feature designed into ADTRAN DSU/CSU products that allows a remote DSU/CSU to be configured from a local DSU/CSU or VT 100 compatible terminal. 61200270L1-1...
  • Page 122 Communications in which the timing is achieved by sharing a single clock. Each end of the transmission synchronizes itself with the use of clocks and information sent along with the transmitted data. Glossary-10 DSU III ARdc User Manual 61200270L1-1...
  • Page 123 19.2 kbps. VT 100 A non-intelligent terminal or terminal emulation mode used for asynchronous communi- cations. Used to configure the ADTRAN SMART 16 Shelf. 61200270L1-1 DSU III ARdc User Manual Glossary-11...
  • Page 124 Glossary Glossary-12 DSU III ARdc User Manual 61200270L1-1...
  • Page 125 12-3 dial 3-2 clear to send (CS) 3-6, 6-8 dial backup AT commands 6-9 configuration 8-1 clock source 5-5 dial options 4-1, 10-1 configuration 2-4 dial up operation B-1 dial backup 8-1 61200270L1-1 DSU III ARdc User Manual Index-1...
  • Page 126 6-7, D-1 network rate 12-4 no frame sync 12-3 no Rx signal 12-3 function keys 3-3 no wink from CO 12-3 numeric keypad 3-4 incoming call 12-2 installation 2-1 OOS/OOF from net 12-3 Index-2 DSU III ARdc User Manual 61200270L1-1...
  • Page 127 (RMA) 1-3 asynchronous option 2-7 bi-sync option 2-7 SDLC option 2-6 V.35 connector 2-3 scrambler on/off 6-2 VALA 2-8 AT commands 6-2 factory default 6-2 self test 11-18 shift 3-5 warranty 1-3 61200270L1-1 DSU III ARdc User Manual Index-3...
  • Page 128 Index Index-4 DSU III ARdc User Manual 61200270L1-1...
  • Page 129 Applications Engineering (800) 615-1176 Sales (800) 827-0807 Post-Sale Support Please contact your local distributor first. If your local distributor cannot help, please contact ADTRAN Technical Support and have the unit serial number available. Technical Support (888) 4ADTRAN Repair and Return...

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