ADTRAN DSU III AR User Manual
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ADTRAN DSU III AR User Manual

ADTRAN DSU III AR User Manual

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DSU III AR
Data Service Unit
User Manual
Part Number
1202011L1
61202011L1-1C
May 2001

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Summary of Contents for ADTRAN DSU III AR

  • Page 1 DSU III AR Data Service Unit User Manual Part Number 1202011L1 61202011L1-1C May 2001...
  • Page 2 SunNet Manager is a registered trademark of Sun Microsystems, Inc. Netview is a registered trademark of IBM. IQ View is a trademark of ADTRAN, Inc. Hayes is a trademark of Hayes Microcomputer Products, Inc. This product includes software developed by the University of California, Berkeley, and its contributors.
  • Page 3 The following conventions are used in this manual. Notes provide additional useful information. Cautions signify information that could prevent service interruption. Warnings provide information that could prevent damage to the equip- ment or endangerment to human life.
  • Page 4 If experiencing difficulty with this equipment, please contact ADTRAN for repair and warranty information. If the equipment is causing harm to the network, the telephone company may request this equipment to be disconnected from the network until the problem is resolved or it is certain that the equipment is not malfunctioning.
  • Page 5 Federal Communications Commission Radio Frequency Interference Statement This equipment has been tested and found to comply with the limits for a Class A dig- ital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
  • Page 6 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, users should ensure that it is permissible to be con- nected to the facilities of the local telecommunications company.
  • Page 7 CANADIAN EMISSIONS REQUIREMENTS This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus as set out in the interference-causing equipment standard enti- tled “Digital Apparatus," ICES-003 of the Department of Communications. Cet appareil nuerique respecte les limites de bruits radioelectriques applicables aux appareils numeriques de Class A prescrites dans la norme sur le materiel brouilleur: "Appareils Numeriques,"...
  • Page 8 Affidavit for Connection of Customer Premises Equipment to 1.544 MBPS and/ or Subrate Digital Services For the work to be performed in the certified territory of ______________ (telco name) State of ________________________________ County of ______________________________ I, _______________________ (name), ____________________ (business address), _____________________ (telephone number) being duly sworn, state: I have the responsibility for the operation and maintenance of the terminal equipment to be connected to 1.544 Mbps and/or __________________ subrate digital services.
  • Page 9 ( ) C. An independent training course (e.g., trade school or technical institution) rec- ognized by the manufacturer/grantee of the equipment used to encode analog sig- nals; or ( ) D. In lieu of the proceeding training requirements, the operator(s)/maintainer(S) is (are) under the control of a supervisor trained in accordance with _______________ (circle one) above.
  • Page 10 (including, but not limited to, loss of data or information, loss of profits, or loss of use). ADTRAN is not liable for damages for any cause whatsoever (whether based in contract, tort, or otherwise) in excess of the amount paid for the item.
  • Page 11 Customer Service, Product Support Information, and Training ADTRAN will replace or repair this product within five years from the date of ship- ment if the product does not meet its published specification, or if it fails while in ser- vice.
  • Page 12 Repair and Return If ADTRAN Technical Support determines that a repair is needed, Technical Support will coordinate with the Custom and Product Service (CAPS) department to issue an RMA number. For information regarding equipment currently in house or possible fees associated with repair, contact CAPS directly at the following number:...

  • Page 13: Table Of Contents

    Front Panel Menu Structure ....................3-1 Main Menu........................3-1 Status ........................3-2 Test .......................... 3-2 Configuration (Config) ..................3-2 Dial .......................... 3-2 Basic Menu Travel......................3-3 Enter ......................... 3-3 Up Arrow ......................3-3 Down Arrow ....................3-3 61202011L1-1 DSU III AR User Manual xiii...
  • Page 14 CRS (Call Request Using Stored Number) ..........4-11 DIC(Disregard Incoming Call) ..............4-11 PRN (Program Number) ................4-11 RLN (Request List of Numbers) ..............4-12 Chapter 5. Network Configuration Network Options ......................... 5-1 Loop Rate........................5-1 DSU III AR User Manual 61202011L1-1...
  • Page 15 Manual Command ......................9-1 Using the Front Panel to Enter a Manual Command ..........9-2 Chapter 10. Dial Selection dial Options ........................10-1 Dial Stored Number....................10-2 Enter Dial Number...................... 10-2 Redial Last Number....................10-2 61202011L1-1 DSU III AR User Manual...
  • Page 16 Self Test........................11-22 Test Purpose ....................... 11-22 Initiating ......................11-22 Interpreting Test Results .................. 11-22 Remote Unit Diagnostics ....................11-23 Test Purpose ....................... 11-24 Initiating ......................11-24 Test Results ......................11-24 Interpreting Test Results .................. 11-25 DSU III AR User Manual 61202011L1-1...
  • Page 17 Appendix C. Default Configuration Profiles ............. C-1 Appendix D. EIA-232 Connector................... D-1 Appendix E. DSU to DSU Tail Circuit................E-1 Appendix F. Specifications Summary................F-1 Appendix G. Acronyms/Abbreviations ............... G-1 Appendix H. Glossary ..................... H-1 Index ..........................Index-1 61202011L1-1 DSU III AR User Manual xvii...
  • Page 18 Table of Contents xviii DSU III AR User Manual 61202011L1-1...

  • Page 19: List Of Figures

    List of Figures Figure 1-1. Sample Point-to-Point Application for DSU III AR........1-2 Figure 2-1. DSU III AR Rear View ..................2-3 Figure 3-1. Main Menu LCD Display ................3-1 Figure 3-2. Example of Basic Menu Travel..............3-4 Figure 3-3. DSU III AR Front View .................. 3-5 Figure 4-1.
  • Page 20 Figure 11-16.V.54 RDL with Test Pattern............... 11-23 Figure 11-17.Initiating a Remote Test ................11-24 Figure 12-1. Examples of Status Displays ............... 12-1 Figure D-1. EIA-232 Connector..................D-1 Figure E-1. DDS Tail Circuit ....................E-2 Figure E-2. Standard EIA-232-D Crossover Cable ............E-3 DSU III AR User Manual 61202011L1-1...
  • Page 21 Table 6-9. TR Options AT Commands................. 6-14 Table 6-10. SR Options AT Commands ................. 6-15 Table 6-11. Auxiliary Port AT Commands..............6-17 Table 6-12. DSU III AR Network Throughput ............. 6-17 Table 7-1. Test Timeout AT Commands................ 7-2 Table 7-2.
  • Page 22 Table B-19. EIA Local Loopback AT Commands ............B-9 Table B-20. EIA Remote Loopback AT Commands ............B-9 Table B-21. AT Command for Storing Phone Numbers ..........B-9 Table B-22. AT Commands for Auto Answer ..............B-9 Table B-23. Test AT Commands..................B-10 xxii DSU III AR User Manual 61202011L1-1...
  • Page 23 List of Tables Table B-24. DTE With Test Pattern Commands............B-11 Table B-25. Remote Tests and AT Commands..............B-11 Table C-1. User Profiles ....................C-1 Table C-2. Default Configuration Profiles ..............C-2 61202011L1-1 DSU III AR User Manual xxiii...
  • Page 24 List of Tables xxiv DSU III AR User Manual 61202011L1-1...

  • Page 25: 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 AR may be used in either point-to-point or multi-point circuits.

  • Page 26: Dds Overview

    The regional operating companies provide the 4-wire local loop service to SW56 customers. In SW56 mode the DSU III AR supports DTE rates of 2.4, 4.8, 9.6, 19.2, 38.4 (asynchronous or synchronous) and 56 kbps (synchronous).

  • Page 27: Chapter 2. Installation

    ADTRAN Customer Service. If possible, keep the original shipping container for use in shipping the DSU III AR for repair or for verification of damage during shipment. ADTRAN Shipments Include...

  • Page 28: Power Up

    Chapter 2. Installation Power Up Each DSU III AR unit is provided with a captive 8-foot power cord, terminated by a three-prong plug which connects to a grounded 115 VAC power receptacle. A telco connector is also provided for interface to the network.

  • Page 29: Rear Panel

    Pin assignments for the DTE and network connections are listed in Appendix A, Pinouts on page A-1. The DSU III AR rear panel is shown in Figure 2-1. 1 Aux EIA-232...

  • Page 30: Network Interface Connection

    Chapter 2. Installation Network Interface Connection The DSU III AR has an eight-position modular jack labeled T ELCO The connector is used for connecting to the network when the unit is configured for either dedicated or switched operation. The pin assignments for the telco connector are listed in Table A-1 on page A-1.

  • Page 31: Chapter 3. Operation

    Chapter 3 FRONT PANEL MENU STRUCTURE The DSU III AR 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 32: Status

    Chapter 10, Dial Selection on page 10-1 for more information. The DIAL option is only available when the unit is configured for a Switched 56 network type. For more information, see Chapter 10, Dial Se- lection on page 10-1. DSU III AR User Manual 61202011L1-1...

  • Page 33: Basic Menu Travel

    Chapter 3. Operation Basic Menu Travel Four function keys on the left side of the DSU III AR 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 34: Figure 3-2. Example Of Basic Menu Travel

    Chapter 3. Operation The following Step/Action Table and Figure 3-2 illustrate how to select the DSU III AR Loop Rate option. Step Action To select C ), press ; then Enter ONFIGURATION ONFIG To select L or R test, press the corresponding...

  • Page 35: Front Panel

    Chapter 3. Operation FRONT PANEL The DSU III AR faceplate is shown in Figure 3-3. Descriptions of each part of the front panel follow the figure. ENTER DSU III AR ALM TST SHIFT QUICK CANCEL Figure 3-3. DSU III AR Front View LCD Window Displays menu items and messages in 2 lines by 16 characters.

  • Page 36: Shift

    Test menu. In SW56 operation, if the unit is not in test, the Quick key returns to the D menu. LED Descriptions The DSU III AR has seven LED indicators, which are described below. REQUEST TO SEND CLEAR TO SEND TRANSMIT DATA...

  • Page 37: Chapter 4. Configuration Overview

    Chapter 4 LOCAL AND REMOTE CONFIGURATION The DSU III AR 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 38: Configuration Methods

    • Front Panel Commands • Remote Commands from another DSU running SLIP/PPP protocol. The DSU III AR provides methods for both local and remote configuration. These methods are shown in Table 4-1. Table 4-1. Configuration Methods Stand Alone Method Local...

  • Page 39: Figure 4-1. Complete Configuration Menu

    4= EIA RLB EN/DIS 2= ENABLED 4= DIAL OPTIONS 1= PHONE NUMBER STORED NUMBER TO EDIT (1-10):1 2= AUTO ANSWER 1= DISABLED 2= ENABLED 5= MANUAL COMMAND COMMAND COMMAND: HH VALUE: 00 Figure 4-1. Complete Configuration Menu 61202011L1-1 DSU III AR User Manual...

  • Page 40: Figure 4-2. Configuration Menu With Dte Options

    3= OFF LOCD ONLY A= SR OPTIONS 4= OFF TEST ONLY 5= OFF TEST +OOS 1= EIA-232 6= OFF TEST + LOCD B= AUXILIARY PORT 2= V.35 Figure 4-2. Configuration Menu with DTE Options DSU III AR User Manual 61202011L1-1...

  • Page 41: Vt-100 Connection

    Chapter 4. Configuration Overview VT-100 Connection The DSU III AR can be configured and controlled over a direct EIA- 232 connection to the Auxiliary Port located on the back of the unit. To set up the DSU III AR for a VT-100 terminal session, the...

  • Page 42: At Commands

    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 AR. A specified time delay must occur between the last data character and the first escape sequence character.

  • Page 43: V.25 Bis Commands

    Chapter 4. Configuration Overview V.25 Bis Commands When configured for the V.25 bis option, the DSU III AR accepts in- band dialing and configuration commands from both synchronous and asynchronous DTE ports. The V.25 bis option supports the following protocols: •...

  • Page 44: Asynchronous Option

    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.
  • Page 45 This command causes the DSU to go on-line. For dial backup units, this command hangs up the dial backup line and initiates an attempt to reestablish the main (DDS) line. There are no parameters associated with this command. Possible indications include VAL, CNX, and CFIxx. 61202011L1-1 DSU III AR User Manual...

  • Page 46: Switched 56 Operation

    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 AR to be configured with AT commands via a synchronous interface. The command has the following format: CNL[LOCAL PASSWORD;]AT[ONE OR MORE AT COMMANDS]...

  • Page 47: Crs (Call Request Using Stored Number)

    Possible responses include VAL, CNX, and CFIxx. CRS (Call Request Using Stored Number) The CRS command causes the DSU III AR to dial the number stored in the specified register. The format of this command is as follows:...

  • Page 48: Rln (Request List Of Numbers)

    When a correct register number is entered, the following response is returned: [REGISTER NUMBER];[NUMBER STORED]VAL If no register number is present in the command, the DSU III AR responds with a list of all the registers and the stored numbers. This list is followed by the VAL response.

  • Page 49: Chapter 5. Network Configuration

    Network Configuration Chapter 5 NETWORK OPTIONS The N configuration parameters control the loop ETWORK PTIONS operation of the DSU III AR. Once a parameter is set, C is displayed briefly OMMAND CCEPTED before returning to the active menu. Loop Rate The Loop Rate option sets the loop operating speed.

  • Page 50: Figure 5-1. Setting Loop Rate Options

    56K with no secondary channel 64K clear channel 2.4K with secondary channel 4.8K with secondary channel %B10 9.6K with secondary channel %B11 19.2K with secondary channel %B12 38.4K with secondary channel %B13 56K with secondary channel %B14 DSU III AR User Manual 61202011L1-1...

  • Page 51: Network Address

    Chapter 5. Network Configuration Network Address A two-digit decimal address can be assigned to each DSU III AR. This addressing capability makes it possible to perform remote configuration and testing in point-to-point and multi-drop networks. Figure 5-2 shows the menu path used to change the network address.

  • Page 52: Remote Configuration

    Chapter 5. Network Configuration Remote Configuration This option sets up the DSU III AR to accept or reject remote configuration commands. Figure 5-3 shows the menu path for enabling/disabling remote configuration. The factory default setting is E NABLED 1= LOOP RATE 1= NETWORK OPT.

  • Page 53: Network Type

    Chapter 5. Network Configuration Network Type This option configures the DSU III AR for the specific type of network being used. The choices are D , AT&T/MCI SW56, EDICATED and US S SW56. The factory default setting is PRINT (see Figure 5-4).

  • Page 54: Clock Source

    ETWORK commands for setting the clock source. When the DSU III AR is set as the master clock source, it will default to its internal oscillator as the clock reference. To enable the External DTE port as the reference clock for the circuit, see Chapter 6, Configuring DTE Options on page 6-1.

  • Page 55: Chapter 6. Configuring Dte Options

    The DTE O menu is used to select the configuration PTIONS parameters that control the operation of the DSU III AR's DTE Interface such as the DTE rate, connector type, data format, DTE command options, transmit clock, CS options, anti-stream, and CD options.

  • Page 56: Dte Rate

    DTE rate automatically matches the loop rate. If an attempt is made to set the DTE rate for loop rates slower than 56 kbps, the DSU III AR briefly displays DTE R before returning to the status screen. The factory default...

  • Page 57: Figure 6-2. Dte Rates For 56 Kbps Secondary Channel And 64 Kbps Loop Rates

    Chapter 6. Configuring DTE Options If the DSU III AR is set for a loop rate of 56 kbps with secondary channel, then S options are available as shown CRAMBLER in Figure 6-2. The factory default setting is S CRAMBLER 1= NETWORK OPT.
  • Page 58 To prevent this, the S or S LBE option should be selected CRAMBLER UPPRESS for both the local and remote DSU III AR. DSU III AR User Manual 61202011L1-1...

  • Page 59: Connector Type

    2= REMOTE ENTER ADDRESS 3= TEST OPTIONS 6= CS OPTIONS 4= DIAL OPTIONS 7= ANTI-STREAM 5= MANUAL 8= CD OPTIONS 9=TR OPTIONS A= SR OPTIONS B= AUXILIARY PORT Figure 6-3. Selecting the Connector Type 61202011L1-1 DSU III AR User Manual...

  • Page 60: 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 DSU III AR User Manual 61202011L1-1...

  • Page 61: Dte Command Option

    DTE format is independent of the D option. However, if V.25 BSC/A is selected, the unit will ORMAT SYNC use V.25 B (BSC) commands for synchronous data format or V.25 ISYNC commands for asynchronous data format. SYNC 61202011L1-1 DSU III AR User Manual...

  • Page 62: Transmit Clock

    The T option is used to select the source of the clock RANSMIT LOCK used to transfer data from the DTE into the DSU III AR. Figure 6-6 shows the menu path used to set the T option. The RANSMIT...
  • Page 63 DSU cable diagram for this application is shown in Appendix D, EIA-232 Connector on page D-1. Using this option and special cable eliminates data errors caused by excessive delays in the DTE transmit clock receiver and transmit data driver. 61202011L1-1 DSU III AR User Manual...

  • Page 64: 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 on page 6-11 shows the AT C used to set the CS O OMMANDS PTIONS 6-10 DSU III AR User Manual 61202011L1-1...

  • Page 65: Table 6-5. Cs Options At Commands

    Secondary Channel 1.1ms 16.1ms ±.4ms 1.1ms 16.1ms ±.4ms .33ms 38.4K 1.5ms 16.5ms ±.4ms .63ms 19.2K 1.5ms 16.5ms ±.4ms 1.25ms 9.6K 1.5ms 16.5ms ±.4ms 2.5ms 4.8K 1.9ms 16.9ms ±.7ms 5.0ms 2.4K 3.8ms 18.8ms ±1.3ms 10.0ms 61202011L1-1 DSU III AR User Manual 6-11...

  • Page 66: Anti-Stream

    The A option is used to select the anti-stream time-out. TREAM The anti-stream time-out is the maximum time the DSU III AR transmits data into 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 67: Carrier Detect (Cd) Options

    Front Panel AT Command Description 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 61202011L1-1 DSU III AR User Manual 6-13...

  • Page 68: Tr Options

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

  • Page 69: Sr Options

    Off 5 seconds after disconnect (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 disconnect or test 61202011L1-1 DSU III AR User Manual 6-15...

  • Page 70: Auxiliary Port

    6= 1.2K SEC 9=TR OPTIONS 7= 2.4K SEC A= SR OPTIONS 8= OFF B= AUXILIARY PORT 9= 300 CONTROL A= 1.2K CONTROL B= 2.4K CONTROL C= 9.6K CONTROL Figure 6-12. Setting the Secondary Rate 6-16 DSU III AR User Manual 61202011L1-1...

  • Page 71: Table 6-11. Auxiliary Port At Commands

    Secondary channel rate: 300 bps 5=600 Secondary channel rate 600 bps 6=1.2K Secondary channel rate 1200 bps 7=2.4K Secondary channel rate: 2400 bps Table 6-12. DSU III AR Network Throughput Loop Rate Secondary Channel Throughput 2.4k 4.8k 9.6k 19.2k 38.4k 1.25k...
  • Page 72 Chapter 6. Configuring DTE Options 6-18 DSU III AR User Manual 61202011L1-1...

  • Page 73: Chapter 7. Configuring Test Options

    Test Time-out The T option sets the length of time a DSU III AR remains in a test mode before automatically returning to the data mode. Enter the time-out from 0 to 255 seconds. The factory default setting is off (0).

  • Page 74: Remote Digital Loopback

    (RDL) option specifies whether the EMOTE IGITAL OOPBACK DSU III AR responds to an RDL request from the far end of the circuit. The factory default setting is RDL A . Figure 7-2 CCEPTED shows the menu path used to access this option.

  • Page 75: Eia Local Loopback

    Chapter 7. Configuring Test Options EIA Local Loopback The EIA LLB (Electronics Industries Association Local Loopback) option specifies whether the DSU III AR responds to the LLB input from the DTE. The factory default setting is D . Figure 7-3 ISABLED shows the menu path used to access the EIA LLB option.

  • Page 76: Eia Remote Loopback

    Chapter 7. Configuring Test Options EIA Remote Loopback The EIA RLB (Electronics Industries Association Remote Loopback) option specifies whether the DSU III AR responds to the RLB input from the DTE. The factory default setting is D ISABLED Figure 7-4 shows the menu path for the EIA RLB options.

  • Page 77: Chapter 8. Configuring Dial Options

    Switched 56 operation. Phone Number The DSU III AR stores up to 10 numbers of 36 digits each. Edit a phone number by reentering the entire number. This process overwrites the previously stored number. Figure 8-1 shows the menu path used to access the P option.

  • Page 78: Auto Answer

    NSWER to be answered. If E , incoming calls are automatically NABLED answered by the DSU III AR. If D , an incoming call can be ISABLED answered manually by an AT or V.25 command from the DTE, or by raising TR from the DTE. Figure 8-2 shows the menu path used to enable or disable this option.

  • Page 79: Chapter 9. Manual Command

    The M option is a shortcut method for entering ANUAL OMMAND configuration and control commands for the DSU III AR. The first display prompts the user to enter the command number. COMMAND:00 Figure 9-1 shows the menu path for M...

  • Page 80: Using The Front Panel To Enter A Manual Command

    COMMAND: XX VALUE: 00 Use the number keys to enter the hexadecimal value. Press to complete. The system briefly displays Enter and returns OMMAND CCEPTED to the active menu. DSU III AR User Manual 61202011L1-1...

  • Page 81: Table 9-1. Manual Commands

    Option Set #4 Store User Profile Save to Profile 0 Save to Profile 1 Select User Profile Power Up Profile 0 Power Up Profile 1 Network Address Lock Network Addr. Unlock Network Addr. Lock 61202011L1-1 DSU III AR User Manual...
  • Page 82 Chapter 9. Manual Command DSU III AR User Manual 61202011L1-1...

  • Page 83: Chapter 10. Dial Selection

    Figure 10-1 below shows the menu path used to access these options. 1= DIAL STORED # Select Stored Number 1-A 4=DIAL 2= ENTER DIAL # NNNNNNN 3= REDAIL LAST # Figure 10-1. Dial Options Menu 61202011L1-1 DSU III AR User Manual 10-1...

  • Page 84: Dial Stored Number

    Figure 10-2. Path to Storing Numbers Option Enter Dial Number This option allows you to enter a phone number of up to 36 digits for the DSU III AR to dial. Redial Last Number Selecting this option redials the last phone number entered.

  • Page 85: Chapter 11. Testing And Troubleshooting

    Testing and Troubleshooting Chapter 11 TEST OVERVIEW The DSU III AR performs a variety of diagnostic functions that isolate portions of the circuit to identify the problem source. Tests may be initiated and terminated from the front panel or the DTE interface.

  • Page 86: Initiating A Test

    5=TEST PATTERN 2=TEST 6=SELF TEST 2=REMOTE UNIT ENTER TEST UNIT ADDRESS: 0 Figure 11-2. Initiating a Test Once a test is initiated P displays briefly and is LEASE followed by the status screen. 11-2 DSU III AR User Manual 61202011L1-1...

  • Page 87: Test Status Display

    ISPLAY TATUS are available only after a test has been initiated: Exit Test Exits the current test and returns to the Main menu. Display Status Reenters test display. 61202011L1-1 DSU III AR User Manual 11-3...

  • Page 88: Figure 11-4. Complete Test Menu

    ADDRESS: 0 4=STRESS PTRN #2 5=STRESS PTRN #3 6=STRESS PTRN #4 7=DATA FROM DTE Figure 11-4. Complete Test Menu When the is active, press the key to access the E Quick STATUS DISPLAY menus. 11-4 DSU III AR User Manual 61202011L1-1...

  • Page 89: Troubleshooting

    Messages from the DSU/CSU The DSU III AR displays messages on the LCD display and LEDs concerning the status of the unit and the local loop. If the Alarm LED is O , at least one of the messages shown in Table 11-1 will be displayed on the LCD.

  • Page 90: Troubleshooting New Installs

    DDS circuit. 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. After verifying the items listed in Table 11-2 on page 11-7, the unit...

  • Page 91: Table 11-2. Troubleshooting New Installs

    Telco Cable Verify the telco cable is securely connected to the DSU/CSU and wall jack. Power the unit Off and Verify the unit passes self test then On. during power-up (displayed on the LCD). 61202011L1-1 DSU III AR User Manual 11-7...

  • Page 92: Test Sequence For Troubleshooting New Installs Or Existing Circuits

    ADTRAN Technical Support (see page xi in the front section of this manual). The DSU III AR unit diagnostics tests can be initiated through AT Commands from the DTE interface. These commands are listed in Table 11-3 on page 11-9.

  • Page 93: Table 11-3. At Commands

    Restore Factory Options none AT&Kn Flow Control none AT&Ln Network Type AT&Qn DTE Data Format AT&Rn CS Options AT&Sn SR Options AT&Tn Test Commands AT&V View Current Configuration none AT&Wn Store User Profile 61202011L1-1 DSU III AR User Manual 11-9...

  • Page 94: Local Unit Diagnostics

    Chapter 11. Testing and Troubleshooting LOCAL UNIT DIAGNOSTICS The local DSU III AR can perform six different tests. These tests can be initiated through AT Commands from the DTE Interface. See Table 11-4 for a list of the AT Commands.

  • Page 95: Table 11-5. Dte With Test Pattern Commands

    5=STRESS PTRN #3 _T4&T8 Stress pattern with medium ones density. Continuous series of octets: 0011 0010. 6=STRESS PTRN #4 _T5&T8 Stress pattern with low ones density. Con- tinuous series of octets: 0100 0000. 61202011L1-1 DSU III AR User Manual 11-11...

  • Page 96: Dte And Loop (Ll)

    DTE and Loop (LL) Test Description The DTE & L test splits the DSU III AR 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 & L test provides a bidirectional loopback at the DSU/CSU.

  • Page 97: Initiating

    Figure 11-6. Initiating a DTE & Loop Test Interpreting Test Results A BERT tester must be used to interpret the test results of a DTE & Loop test because the BERT originates external to the local DSU. 61202011L1-1 DSU III AR User Manual 11-13...

  • Page 98: Loop Only (Rt)

    The L (RT) test allows the loop interface and a major portion of the DTE interface for the local DSU III AR 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 99: Initiating

    Figure 11-8. Initiating a Loop Only Test Interpreting Test Results The L test is used for looping the DDS circuit back to the telco. No test results are available from the local DSU III AR. 61202011L1-1 DSU III AR User Manual 11-15...

  • Page 100: Dte Only

    The DTE O test provides a method for testing both the DTE interface drivers and receivers of the local DSU III AR 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 101: Initiating

    Figure 11-10. Initiating a DTE Only Test Interpreting Test Results A BERT tester must be used to interpret the test results of a DTE O test because the BERT originates external to the local DSU. 61202011L1-1 DSU III AR User Manual 11-17...

  • Page 102: Dte With Test Pattern

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

  • Page 103: Initiating

    2=REMOTE UNIT Figure 11-12. Initiating a DTE Test with Test Pattern Interpreting Test Results If the unit is functioning properly, the DSU III AR displays: DTE WITH TP TST ERR=0000 The first line of the display indicates the type of test being performed, while the second line of the display indicates the number of errors accumulated by the test pattern detector.

  • Page 104: Test Pattern

    Chapter 11. Testing and Troubleshooting Test Pattern The T option converts the local DSU III AR into a ATTERN 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.

  • Page 105: Initiating

    To verify proper operation of this test, single bit errors can be injected into the transmitted test pattern by pressing 2. These errors appear on the T display. Keypad Effect Zeros error counter Injects single Error 61202011L1-1 DSU III AR User Manual 11-21...

  • Page 106: Self Test

    Chapter 11. Testing and Troubleshooting Self Test The S verifies current operation of the DSU III AR. It can be performed at any time and is recommended if there is any question about the DSU's health. Test Purpose To determine if the DSU is functioning properly.

  • Page 107: Remote Unit Diagnostics

    Chapter 11. Testing and Troubleshooting REMOTE UNIT DIAGNOSTICS A remote DSU III AR can perform seven different tests; see Table 11-6. Table 11-6. Remote Tests and AT Commands Front Description Panel Command 1=2047 PATTERN _T0&T7 Standard 2047 random data pattern 2=511 PATTERN _T1&T7...

  • Page 108: Test Purpose

    Test Purpose Test the local DSU, the DDS circuit, and remote DSU. Initiating Follow the menu path outlined in Figure 11-17 to place a remote DSU III AR into loopback. 1= 2047 PATTERN 2= 511 PATTERN 3= STRESS PTRN #1...

  • Page 109: Interpreting Test Results

    If the unit is functioning properly, the display should show: TST ERR = 0000 The keypad buttons can be used to manually inject errors and clear the error count. Keypad Effect Zeros error counter Injects single Error 61202011L1-1 DSU III AR User Manual 11-25...
  • Page 110 Chapter 11. Testing and Troubleshooting 11-26 DSU III AR User Manual 61202011L1-1...

  • Page 111: Chapter 12. Viewing Status Information

    TATUS operational status of the network and the DTE interfaces. After 30 seconds of no front panel operation, the DSU III AR automatically reverts to the status display. Examples of possible status displays are shown in Figure 12-1.

  • Page 112: Dsu Operational Status

    In SW56 mode the following messages are possible: IDLE The unit is idle, waiting for a call or a dial com- mand. INCOMING CALL The unit has detected an incoming call. DIALING The unit is dialing a number. 12-2 DSU III AR User Manual 61202011L1-1...

  • Page 113: Dds Network Status

    ANSWERING CALL The DSU III is answering an incoming call. NO WINK FROM CO The DSU III did not see a proper signal from the network during dialing. CALL DISCONNECT The SW56 was terminated. 61202011L1-1 DSU III AR User Manual 12-3...

  • Page 114: Network Rate

    Four additional DTE interface leads are displayed with their current status (on or off) displayed below them. The leads are identified as follows: - Data terminal ready - Data set ready LLB - Local loopback RLB - Remote loopback 12-4 DSU III AR User Manual 61202011L1-1...

  • Page 115: Appendix A. Pinouts

    Table A-1. RJ-48S Telco Connector Pinouts Name Description Transmit Data from DSU to Network-Ring 1 Transmit Data from DSU to Network-Tip 1 Not Used Receive Data from Network to DSU-Tip Receive Data from Network to DSU-Ring 61202011L1-1 DSU III AR User Manual...

  • Page 116: Table A-2. Primary Eia-232 Connector Pinouts

    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) DSU III AR User Manual 61202011L1-1...

  • Page 117: Table A-3. Primary V.35 Connector Pinouts

    Receiver Signal Element Timing (SCR-B) Transmitted Data (SD-A) Transmitted Data (SD-B) Transmitter Signal Element Timing (SCT-A) Transmitter Signal Element Timing (SCT-B) External TX Signal Element (SCX-A) External TX Signal Element (SCX-B) Test Indicator (TI) 61202011L1-1 DSU III AR User Manual...

  • Page 118: Table A-4. Auxiliary Eia-232 Connector Pinouts

    Transmit Data (TD) Receive Data (RD) Request to Send (RS) Clear to Send (CS) Data Set Ready (SR) On all the time. Signal Ground (SG) Received Line Signal Detector (CD) On all the time. DSU III AR User Manual 61202011L1-1...

  • Page 119: Appendix B. At Commands

    AT Commands Appendix B This Appendix lists all the AT Commands available for the DSU III 61202011L1-1 DSU III AR User Manual...

  • Page 120: Table B-1. At Commands

    AT&Fn Restore Factory Options none AT&Kn Flow Control none AT&Ln Network Type AT&Qn DTE Data Format AT&Rn CS Options AT&Sn SR Options AT&Tn Test Commands AT&V View Current Configuration none AT&Wn Store User Profile DSU III AR User Manual 61202011L1-1...

  • Page 121: Table B-2. Loop Rate Commands

    Front Panel AT Command Description XX (Decimal) _N=xx Assigns a 2 digit Network Address Table B-4. Remote Configuration Commands Front Panel AT Command Description 1=DISABLE &P4 Disable Remote Configuration 2=ENABLE &P5 Enable Remote Configuration 61202011L1-1 DSU III AR User Manual...

  • Page 122: Table B-5. Network Type Commands

    4=DTE 19.2K DTE rate 19.2K sync and async 5=DTE 38.4K DTE rate 38.4K sync and async 6=DTE 56K/57.6K DTE rate 56K sync or 57.6 async 7=SAME AS LOOP DTE rate same as loop speed DSU III AR User Manual 61202011L1-1...

  • Page 123: Table B-8. Scrambler On/Off At Commands

    3=ASYNC 11 BITS 11 bits including start, stop, parity Table B-10. Transmit Clock AT Commands Front Panel AT Command Description 1=NORMAL &X0 TX clock from DSU selected 2=EXTERNAL &X1 ETC clock from DTE selected 61202011L1-1 DSU III AR User Manual...

  • Page 124: Table B-11. 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 AR will turn off CS but continue to pass data until RS goes off. CS also off if DSU cannot pass data.

  • Page 125: Table B-13. Cd Options At Commands

    Off 5 seconds after disconnect (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 disconnect or test. 61202011L1-1 DSU III AR User Manual...

  • Page 126: Table B-16. Secondary Rate At Commands

    Specify 0 - 255 seconds test time-out Table B-18. Remote Digital Loopback AT Commands Front Panel AT Command Description 1=RDL IGNORED &T5 RDL request from remote DSU ignored 2=RDL ACCEPTED &T4 RDL request accepted DSU III AR User Manual 61202011L1-1...

  • Page 127: Table B-19. Eia Local Loopback At Commands

    Table B-21. AT Command for Storing Phone Numbers AT Command Description &Zn= Store Phone Number Table B-22. AT Commands for Auto Answer Front Panel AT Command Description 1=DISABLED Auto Answer disabled 2=ENABLED Auto Answer enabled 61202011L1-1 DSU III AR User Manual...

  • Page 128: Table B-23. Test At Commands

    Check Internal Components (Resets Unit) Exit Test &T0 Stops test, returns to data mode TD = Customer Transmit Data RD = Customer Receive Data TX = Network Transmit Data RX = Network Receive Data B-10 DSU III AR User Manual 61202011L1-1...

  • Page 129: Table B-24. Dte With Test Pattern Commands

    DDS Stress Pattern #1 4=STRESS PTRN #2 _T3&T7 DDS Stress Pattern #2 5=STRESS PTRN #3 _T4&T7 DDS Stress Pattern #3 6=STRESS PTRN #4 _T5&T7 DDS Stress Pattern #4 7=DATA FROM DTE &T6 Data from DTE 61202011L1-1 DSU III AR User Manual B-11...
  • Page 130 Appendix B. AT Commands B-12 DSU III AR User Manual 61202011L1-1...

  • Page 131: Appendix C. Default Configuration Profiles

    Default Configuration Profiles Appendix C DEFAULT CONFIGURATION PROFILES The DSU III AR contains four different user profiles (Table C-1) or sets of configurations options stored in read-only memory (see Table C-2 on page C-2). The unit is shipped from the factory with profile 1 loaded into the nonvolatile configuration memory.

  • Page 132: Table C-2. Default Configuration Profiles

    Network Options Loop Rate AUTO AUTO AUTO Network Address Remote Conf. En/Dis Enable Enable Enable Enable Network Type Dedicated Dedicated AT&T/MCI AT&T/MCI SW56 SW56 Clock Source From From From From Network Network Network Network DSU III AR User Manual 61202011L1-1...
  • Page 133 Test Time-out 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 61202011L1-1 DSU III AR User Manual...
  • Page 134 Appendix C. Default Configuration Profiles DSU III AR User Manual 61202011L1-1...

  • Page 135: Figure D-1. Eia-232 Connector

    DTE transmit clock receiver and transmit data driver. When creating this cable at the DTE interface EIA-232 connector, tie transmit clock lead (TC) to external transmit (ETC) as shown. DSU III AR Pin 15 Pin 24 EIA-232 Connector Figure D-1. EIA-232 Connector 61202011L1-1 DSU III AR User Manual...

  • Page 136: Appendix D. Eia-232 Connector

    Appendix D. EIA-232 Connector DSU III AR User Manual 61202011L1-1...

  • Page 137: Appendix E. Dsu To Dsu Tail Circuit

    ADTRAN DSU/CSU units will operate in this configuration. ADTRAN does not recommend the tail circuit mode due to the potential for clock slippage and data loss when using this configuration. Moreover, further problems can occur when each DDS circuit is using a different master clock source and will require additional hardware called a tail cir- cuit buffer to reduce the risk of data overruns and clock slips.

  • Page 138: Figure E-1. Dds Tail Circuit

    Appendix E. DSU to DSU Tail Circuit Loop Loop NETWORK NETWORK Tail circuit crossover cable Figure E-1. DDS Tail Circuit DSU III AR User Manual 61202011L1-1...

  • Page 139: Figure E-2. Standard Eia-232-D Crossover Cable

    An EIA-232 DB-25 DSU tail circuit cable diagram for a DSU tail circuit application is shown in Figure E-2. Chassis Ground Chassis Ground Signal Ground Signal Ground CD (RLSD) CD (RLSD) RC (SCR) RC (SCR) ETC (SCR) ETC (SCR) Figure E-2. Standard EIA-232-D Crossover Cable 61202011L1-1 DSU III AR User Manual...
  • Page 140 Appendix E. DSU to DSU Tail Circuit DSU III AR User Manual 61202011L1-1...

  • Page 141: Appendix F. Specifications Summary

    Specifications Summary Appendix F SPECIFICATIONS AND FEATURES This section describes the standard specifications and features incorporated in the DSU III AR. Operating Modes • Dedicated DDS (point-to-point, multipoint) • DDSII DDS with secondary channel (point-to-point, multipoint) Switched 56 (4-wire) Data Rates •...
  • Page 142 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 AR User Manual 61202011L1-1...
  • Page 143 F to 158 • Relative Humidity: Up to 95% non-condensing Hardware Specifications • Dimensions: 2.25"H, 8.75"W, 10.25"D • Weight: 3 lbs • Power: 115 VAC, 60 Hz, 8 W • MTBF: 439,754 hours • CLEI: DDSUJ602AA 61202011L1-1 DSU III AR User Manual...
  • Page 144 Appendix F. Specifications Summary DSU III AR User Manual 61202011L1-1...

  • Page 145: Appendix G. Acronyms/Abbreviations

    Acronyms/Abbreviations Appendix G ACK....acknowledgment ALM ....alarm American National Standards Institute ANSI ....AR...... access rate ARP ....address resolution protocol async ....asynchronous BECN ....backward explicit congestion notification bit oriented protocol BOP ....CCITT ....Consultive Committee for International Telephony and Telegraphy carrier detect CD .....
  • Page 146 Appendix G. Acronyms/Abbreviations DCE ....data communications equipment DDS....digital data service DE ...... discard eligible DLCI....data link connection identifier DSAP....destination service access point DSR ....data set ready DSU ....data service unit DTE ....data terminal equipment DTR ....
  • Page 147 Appendix G. Acronyms/Abbreviations LLC....logical link control LMI....local management interface LRC ....lateral redundancy check MIB ....management information base ms ...... millisecond office channel unit OCU ....out of service OOS....PPP ....point-to-point protocol PU ...... physical unit PVC ....
  • Page 148 Appendix G. Acronyms/Abbreviations SW56 ....switched 56 sync....synchronous TD ...... transmit data TR ...... data terminal ready Tx ....... transmit UA...... unavailable UNI ....user-to-network interface VRC ....vertical redundancy check WAN....wide area network DSU IV ESP User Manual 61204011L1-1...

  • Page 149: Appendix H. Glossary

    Glossary Appendix H American National Standards Institute (ANSI) Devices and proposes recommendations for international communications stan- dards. asynchronous A method of data transmission which allows characters to be sent at irregular intervals by preceding each character with a start bit, followed by a stop bit. backward explicit congestion notification (BECN) A bit set by a frame relay network to notify an interface device (DTE) that con- gestion avoidance procedures should be initiated by the sending device.
  • Page 150 Appendix H. Glossary carrier detect. A signal generated by a modem or DSU/CSU. CD indicates the presence of a carrier signal on a communications link. channel service unit CSU. A device used to connect a digital phone line (T1 or Switched 56 line) com- ing in from the phone company to either a multiplexer, channel bank, or directly to another device producing a digital signal;...
  • Page 151 Appendix H. Glossary See CTS. See channel service unit. clear to send. A signal on the DTE interface indicating that the DCE is clear to send data. dial backup. Providing a secondary, switched dial service to route data upon pri- mary link failure.
  • Page 152 Appendix H. Glossary discard eligibility (DE) A user-set bit indicating that a frame may be discarded in preference to other frames if congestion occurs, to maintain the committed quality of service within the network. Frames with the DE bit set are considered Be excess data. See data service unit.
  • Page 153 Appendix H. Glossary forward explicit congestion notification (FECN) A bit set by a frame relay network to notify an interface device (DTE) that con- gestion avoidance procedures should be initiated by the receiving device. See also BECN. frame check sequence (FCS) The standard 16-bit cyclic redundancy check used for HDLC and frame relay frames.
  • Page 154 Appendix H. Glossary ingress Frame relay frames leaving from an access device in a direction toward the frame relay network. interface device Provides the interface between the end device(s) and a frame relay network by encapsulating the user's native protocol in frame relay frames and sending the frames across the frame relay backbone.
  • Page 155 Type of communications link that connects a single device to another single device, such as a remote terminal to a host computer. remote configuration A feature designed into ADTRAN DSU/CSU products that allow remote DSU/ CSU to be configured from a local DSU/CSU or VT-100 compatible terminal. 61204011L1-1...
  • Page 156 Appendix H. Glossary router A device that supports LAN-to-LAN communications. Routers may be equipped to provide frame relay support to the LAN devices they serve. A frame-relay-capable router encapsulates LAN frames in a frame relay frames and feeds those frame relay frames to a frame relay switch for transmission across the network.
  • Page 157 Appendix H. Glossary statistical multiplexing Interleaving the data input of two or more devices on a single channel or access line for transmission through a frame relay network. Interleaving of data is accomplished using the DLCI. switched network The network of dial-up telephone lines using circuit switching to provide com- munications services to network users.
  • Page 158 Appendix H. Glossary H-10 DSU IV ESP User Manual 61204011L1-1...

  • Page 159: Index

    DTE interface, 6-6 Canadian equipment limitations vi data service rates cancel key, on front panel, 3-5 specifications, F-1 CAPS department data set ready (SR) how to contact, xii AT commands B-7 carrier detect (CD) 6-13 61202011L1-1 DSU III AR User Manual Index-1...
  • Page 160 3-5 environmental network specifications, F-3 interface connection 2-4 exiting a test, 11-3 network address 5-3 external clock 6-9 network interface parameters, 4-1 network options 5-1 for loop operation, 5-1 Index-2 DSU III AR User Manual 61202011L1-1...
  • Page 161 (RLN), 4-12 RMA requests xi unit dialing options, 4-1 unit test options, 4-1 safety instructions, vii up and down arrows, on front panel, 3-5 scrambler on/off 6-3 user profiles 4-1 61202011L1-1 DSU III AR User Manual Index-3...
  • Page 162 Index V.35 connector 2-4 VALA 4-9 V.25 bis commands 4-7 asynchronous option 4-8 bi-sync option 4-7 possible responses to, 4-9 warranty, x SDLC option 4-7 Index-4 DSU III AR User Manual 61202011L1-1...

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