MODEL 7510 DSU USER’S GUIDE Document No.
Copyright 1997 Paradyne Corporation. All rights reserved. Printed in U.S.A. Notice This publication is protected by federal copyright law. No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language in any form or by any means, electronic, mechanical, magnetic, manual or otherwise, or disclosed to third parties without the express written permission of Paradyne Corporation, 8545 126th Avenue North, P.
Contents About This Guide Document Purpose and Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . v Document Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v Product-Related Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi 1 About the DSU Model 7510 DSU Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Typical DSU Configurations . . . . . . . . . .
Contents 4 Monitoring the DSU What to Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Viewing System and Test Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Health and Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 Self-Test Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Test Status Messages . . . . . . . .
Contents A Configuration Option Tables Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1 System Options Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2 Network Interface Options Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4 Data Port Options Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About This Guide Document Purpose and Intended Audience This guide contains information needed to set up, configure, and operate the Model 7510 DSU and is intended for installers and operators. Document Summary 7510-A2-GB20-10 Section Description Chapter 1 About the DSU. Describes the DSU features and shows examples of typical configurations. Chapter 2 Using the Asynchronous Terminal Interface. Provides instructions for accessing the user interface and navigating the screens.
About This Guide Section Description Glossary Defines acronyms and terms used in this document. Index Lists key terms, acronyms, concepts, and sections in alphabetical order. Product-Related Documents Document Number Document Title 7510-A2-GN10 Model 7510 DSU Startup Instructions To order additional product documentation, refer to Warranty, Sales, and Service Information on page A at the beginning of this User’s Guide.
About the DSU 1 Model 7510 DSU Features The DSU provides an interface between the customer premises equipment (CPE) and a Digital Data Service (DDS) network. The DSU’s features and capabilities include: Easy Installation. Connects to your equipment using standard connectors and cables. Easy Configuration. A compact and well-thought set of configuration options minimizes your customization effort. DDS Operation. Operates at 56 and 64 kbps CC (clear channel).
About the DSU Typical DSU Configurations The following illustration shows a typical LAN/WAN interconnection application for the DSU. The routers connected to the DSU at each location provide the LAN interconnection. DDS Network Router DSU Router DSU 97-15084-02 The DSU can also be used in a Frame Relay network. Frame Relay Network Router DSU Router DSU 97-15271-01 Two DSUs can be connected back-to-back to act as Local Area Data Sets (LADS).
About the DSU User Interfaces There are two types of user interfaces for the DSU: Menu-driven Asynchronous Terminal Interface (ATI) screens (see Chapter 2, Using the Asynchronous Terminal Interface). Front panel LED status indicators (see Chapter 4, Monitoring the DSU).
Using the Asynchronous Terminal Interface 2 Connecting to the Terminal Port The device used for the Asynchronous Terminal Interface (ATI) can be a VT100-compatible async terminal, or a PC running emulation software. The terminal or PC can be connected to the Terminal port directly, or through an external modem. Ensure that the device you connect communicates using these settings: Data rate set to 9.6 kbps. Character length set to 8. Parity set to None. Stop Bits set to 1.
Using the Asynchronous Terminal Interface Initiating an ATI Session The user interface is blank until activated. Press Return to activate the user interface. The first time you do this the Main Menu screen is displayed.
Using the Asynchronous Terminal Interface MAIN MENU Status Test Configuration Control Load Configuration From... Status Test • System and Test Status • Network Interface Status • Network Tests • Data Port Tests • Lamp Test • Network Performance Statistics • Abort All Tests • Display LEDs • Identity Configuration Edit/Display • System • Network Control • Device Name • Reset Device • Data Port • Terminal Port 497-15238 Screen Format Types Three types of screen formats are available on the ATI.
Using the Asynchronous Terminal Interface Screen Work Areas There are two user work areas: Screen area – This is the area above the dotted line that provides the menu path, menus, and input fields. The menu path appears as the first line on the screen.
Using the Asynchronous Terminal Interface Navigating the Screens You can navigate the screens by: H Using keyboard keys H Using screen function keys H Switching between the two screen work areas Keyboard Keys Use the following keyboard keys to navigate within the screen. To . . . Press . . .
Using the Asynchronous Terminal Interface The current setting or value appears to the right of the field name. The valid choices for the field are displayed in the screen function area. You can enter information into a selected field by typing in the first letter or letters of a field value or command. If a field is blank and the Field Values screen area displays valid selections, press the spacebar and the first valid value for the field will appear.
Using the Asynchronous Terminal Interface Switching to the Screen Function Key Area Selecting Ctrl-a allows you to switch between the two screen work areas to perform all screen functions. Procedure To access the screen function area below the dotted line: 1. Press Ctrl-a to switch from the screen area to the screen function key area below the dotted line. The available selections for the first input field appear on the last line as shown below. 2.
Using the Asynchronous Terminal Interface Ending an ATI Session Use the Exit function key from any screen to terminate the session. Procedure To end an ATI session: 1. Press Ctrl-a to go to the screen function key area below the dotted line. 2. Save changes if required. A confirmation message appears if you have made but not saved changes to your configuration. 3. Tab to Exit (or type e or E) and press Return. The User Interface Idle screen appears.
Customizing the DSU 3 Identifying the Device and System Use the Device Name screen to determine the name that will be displayed at the top of all ATI screens, and system information that will be displayed on the Identity screen.
Customizing the DSU Procedure To enter Device Name screen information: 1. Position the cursor in the Device Name field. Enter a name unique in your system to identify the unit. The maximum length of Device Name is 20 characters. 2. Position the cursor in the System Name field. Enter a name unique in your network to identify the system. The maximum length of System Name is 127 characters. 3. Position the cursor in the System Location field. Enter the physical location of the system.
Customizing the DSU Configuring the DSU Configuration option settings determine how the DSU operates. Use the DSU’s Configuration branch to display or change configuration option settings. Configuration Option Areas The DSU is shipped with factory settings in the Default Factory configuration area. You can find default information by: H Referring to, Appendix A, Configuration Option Tables, or Appendix B, Worksheets. H Accessing the Configuration branch of the DSU menu.
Monitoring the DSU 4 What to Monitor This chapter presents information on how to access and monitor DSU status and performance statistics on the DDS network.
Monitoring the DSU Viewing System and Test Status To view System and Test Status information, follow this menu selection sequence: Main Menu → Status → System and Test Status The System and Test Status screen has three sections: Health and Status – Displays messages in priority order (highest to lowest). Refer to Table 4-2, Health and Status Messages. Self-Test Results – Results of the Diagnostic test run on the device itself. Refer to Table 4-3, Self-Test Results Messages.
Monitoring the DSU Health and Status The following messages appear in the first column of the System and Test Status screen. The highest priority Health and Status message also appears on all ATI screens on the bottom right. Table 4-2. Health and Status Messages (1 of 2) Message What Message Indicates What To Do Cross Pair Detection The DDS Receive (RX) and Transmit (TX) pairs are crossed on the network interface. Alarm LED is on.
Monitoring the DSU Table 4-2. Health and Status Messages (2 of 2) Message What Message Indicates What To Do Device Fail yyyyyyyy An internal error has been 1. Provide the 8-digit failure code shown ( yyyyyyyy ) to your service detected by the operating representative. software. yyyyyyyy indicates the 8-digit hexadecimal failure 2. Reset the DSU to clear the code. condition and message. DSU Operational DSU is functioning properly and there are no status messages to display. No action needed.
Monitoring the DSU Test Status Messages The Test Status Messages in the following table appear in the right column of the System and Test Status screen. Table 4-4. Test Status Messages Test Status Message Meaning No Test Active Status message, indicating no local, remote, or network test in progress. CSU Loopback Active A CSU Loopback toward the network is currently active. Network-init. CSU LB Active A CSU Loopback initiated by the network is currently active.
Monitoring the DSU Viewing Network Interface Status The network interface status fields are read-only: Line Rate (Kbps). If the DSU is connected to an operating line and the Line Rate (Kbps) shows Autobaud and does not change to a line rate within about 25 seconds, Line Rate (Kbps) may have to be reconfigured manually. Refer to Table A-1, System Options. Loop Loss (dB). The loop loss is the loss of signal strength of the receive line signal from the local loop.
Monitoring the DSU Viewing Network Performance Statistics Performance statistics for the network interface are available to: Monitor the current status of the network operations. View the DSU’s performance statistics, which: — Assist you in determining the duration of specific conditions. — Provide a historical context for problem detection and analysis.
Monitoring the DSU Monitoring the LEDs The status of DSU LEDs can be viewed on the Display LEDs screen.
Monitoring the DSU System LEDs OK: ON – DSU is operational. OFF – DSU is performing a power-up self-test, has detected a system failure, or there is no power. ALARM: ON – DSU has detected an alarm condition locally or from the network. Refer to Troubleshooting in Chapter 6. red 7510-A2-GB20-10 green yellow November 1997 (1 03 ) XD (1 04 RT ) S (1 05 C ) TS (1 06 D ) TR (1 08 ) R D TX S F Network N O O O S System O M D ST TE AR AL O K M TEST: ON – Test in progress.
Monitoring the DSU Network LEDs DM – Data Mode: ON – DSU (DDS network interface) is sending or receiving data, or is in DMI condition (all 1s being received). OFF – DDS network interface is receiving CMI codes. OOS – Out of Service: ON – DSU is receiving out of service code from the remote unit. Refer to Table 4-2, Health and Status Messages. OOF – Out of Frame: ON – DSU is detecting an out of frame condition. Refer to Table 4-2, Health and Status Messages.
Monitoring the DSU System red green (1 03 ) XD (1 04 RT ) S (1 05 C ) TS (1 06 D ) TR (1 08 ) R TX D S N O O F M O O S T D TE S AL AR O K M Port LEDs Network Port yellow 496-15062 TXD – Transmitted Data: ON – Receiving all 0s from the DTE. OFF – Receiving all 1s from the DTE. Blinking – User data is being transferred. RXD – Received Data: ON – Sending all 0s to the DTE. OFF – Sending all 1s to the DTE. Blinking – User data is being transferred.
Testing 5 Accessing the Test Menu From the Test menu, you can run network tests, data port tests, and a lamp test for the front panel LEDs.
Testing Loopbacks can be started from a variety of points in the network, as shown in Table 5-1. Table 5-1. Device Messages Loopback Type Initiated By Notes Bilateral Loopback User When enabled, running a DSU loopback also automatically starts a local loopback. Refer to Table A-3, Data Port Options, to enable. Remote unit sending V.54 sequence CSU Loopback User (Network tests) DDS Network, by loop current reversal DSU Loopback (Digital) User Refer to Table A-3, Data Port Options.
Testing Running Network Tests Network tests require the participation of your network service provider.
Testing CSU or External Network Loopback CSU loopback is an external loopback that is located as closely as possible to the network interface. Procedure To run a CSU loopback: 1. Position the cursor at the Start command next to CSU Loopback on the Network Tests screen. 2. Press Enter. 3. The Start command is changed to Stop. If you want to manually stop the test, verify that the cursor is positioned at the Stop command. 4. Press Enter. The duration of the test is displayed.
Testing DSU or Internal Network Loopback DSU loopback is an internal loopback that is located as closely as possible to the customer interface serving the DTE. " Procedure To run a DSU loopback: 1. Position the cursor at the Start command next to DSU Loopback on the Network Tests screen. 2. Press Enter. 3. The Start command is changed to Stop. If you want to manually stop the test, verify that the cursor is positioned at the Stop command. 4. Press Enter. The duration of the test is displayed.
Testing 511 Test Pattern for the Network This test sends or monitors the 511 test pattern over the network interface. Procedure To run a Send 511 test: 1. Position the cursor at the Start command next to Send 511 on the Network Tests screen. 2. Press Enter. 3. The Start command is changed to Stop. If you want to manually stop the test, verify that the cursor is positioned at the Stop command. 4. Press Enter. The duration of the test is displayed. Procedure To run a Monitor 511 test: 1.
Testing Running Data Port Tests For an example of the fields on a test menu screen, refer to Running Network Tests on page 5-3.
Testing Local Loopback Local Loopback loops the user data back to the DTE. This loopback is located as closely as possible to the User Data Port (DTE) interface. Procedure To run a local loopback: 1. Position the cursor at the Start command next to Local Loopback on the Data Port Tests screen. 2. Press Enter. 3. The Start command is changed to Stop. If you want to manually stop the test, verify that the cursor is positioned at the Stop command. 4. Press Enter. The duration of the test is displayed.
Testing Procedure To run a Monitor 511 test: 1. Position the cursor at the Start command next to Monitor 511 on the Data Port Tests screen. 2. If desired, use Ctrl-a to switch to the screen function key area and use the virtual function key r or R (ResetMon) to clear the error counter to zero. Press Ctrl-a to return the cursor to the Start command. 3. Press Enter. 4. The Start command is changed to Stop. If you want to manually stop the test, verify that the cursor is positioned at the Stop command. 5.
Testing Ending an Active Test A test initiated by the user can be ended by the user. A Test Timeout option is available to automatically terminate a user-initiated Loopback or Pattern test after it has been running a specified period of time. Refer to Table A-1, System Options. Test Timeout does not pertain to tests commanded by the: — Network, such as the network-initiated CSU and DSU Loopbacks. — DTE, such as the DTE-initiated Local Loopback. 5-10 On each test screen is a command column.
Messages and Troubleshooting 6 Messages and Troubleshooting There are many messages available to assess the status of the device and contribute to problem resolutions. Refer to the following sections: Responding to Device Messages Troubleshooting Responding to Device Messages The Device Messages in Table 6-1, listed in alphabetical order, may appear in the messages area at the bottom of the ATI screens. Table 6-1.
Messages and Troubleshooting Table 6-1. Device Messages (2 of 2) Device Message What Message Indicates What To Do Invalid Test Combination A loopback or 511 pattern test was in progress when Start was selected to start another test, or was active on the same or another interface when Start was selected. Wait until other test ends and Please Wait Command takes longer than 5 seconds. Wait until message clears. Test Active A test is running and no higher priority health and status messages exist.
Messages and Troubleshooting Troubleshooting This DSU is designed to provide you with many years of trouble-free service. If a problem occurs, however, refer to Table 6-2 for possible solutions. Table 6-2. Troubleshooting (1 of 2) Symptom Possible Cause Solutions Alarm LED is on. One of several alarm conditions exists. Health and Status displays the alarm condition. Refer to Table 4-2, Health and Status Messages, for recommended action. Cannot access the DSU via the ATI.
Messages and Troubleshooting Table 6-2. Troubleshooting (2 of 2) Symptom Possible Cause Solutions Not receiving data; DSU is not responding. DDS line rate/speed has Verify that your subscriber loop is changed. Excessive BPVs causing DSU to become stuck in Autobaud mode. Excessive Loop Loss causing DSU to become stuck in Autobaud mode. running at 56 or 64 CC kbps. Verify that the DSU is set to the same rate as your subscriber loop.
Configuration Option Tables A Overview The tables in this appendix summarize the configuration options accessed when you select Configuration on the Main Menu. The configuration options are arranged into groups based upon functionality. Select . . . To Access the . . . To Configure the . . . System System Options, Table A-1 General system options. Network Network Interface Options, Table A-2 DDS network interface. Data Port Data Port Options, Table A-3 User data on DTE port.
Configuration Option Tables System Options Menu For System Options, refer to Table A-1. To access the System Options screen, follow this menu selection sequence: Main Menu → Configuration (Load Configuration From) → Configuration Edit/Display → System Table A-1. System Options (1 of 2) Operating Mode Possible Settings: DDS, LADS Default Setting: DDS The unit’s operating mode depends upon the DSU’s application. DDS – Standard DDS network operation. The operating rate is either 56 kbps or 64 kbps CC.
Configuration Option Tables Table A-1. System Options (2 of 2) LADS Line Rate (Kbps) Possible Settings: 56, 64 Default Setting: 64 Line operating rate for LADS operation. LADS Line Rate (Kbps) option appears when Operating Mode is set to LADS. 56 – 56 kbps line rate. Provides increased distance for the LADS applications. 64 – 64 kbps line rate. Test Timeout Possible Settings: Enable, Disable Default Setting: Enable Allows user-initiated tests to end automatically.
Configuration Option Tables Network Interface Options Menu For Network Interface Options, refer to Table A-2. To access the Network Interface Options screen, follow this menu selection sequence: Main Menu → Configuration (Load Configuration From) → Configuration Edit/Display → Network Table A-2.
Configuration Option Tables Data Port Options Menu For Data Port Options, refer to Table A-3. To access the Data Port Options screen, follow this menu selection sequence: Main Menu → Configuration (Load Configuration From) → Configuration Edit/Display → Data Port Table A-3.
Configuration Option Tables Table A-3. Data Port Options (2 of 3) Carrier Control by RTS Possible Settings: Constant, Switched Default Setting: Constant Simulates Constant or Switched Carrier operation. Constant – The internal RTS is forced on and the DSU is in a constant Data Mode on the transmit line. The external RTS lead is ignored. The actual signal on the line is either all ones (DMI) or DTE transmitted data. Switched – RTS is monitored and CMI codes are transmitted when RTS is off.
Configuration Option Tables Table A-3. Data Port Options (3 of 3) Monitor DTR Possible Settings: Enable, Disable Default Setting: Enable Indicates to the DSU whether to monitor the Interchange Circuit CT108, Data Terminal Ready (DTR), from the DTE. Enable – The DSU monitors the state of DTR on the DTE port and displays it on the System and Test Status screen. Disable – DTR is not monitored by the DSU. Use when a DTE does not provide the DTR lead at the interface.
Configuration Option Tables Table A-4. Terminal Port Options (2 of 2) Disconnect Time(minutes) Possible Settings: range 1 – 60 Default Setting: 5 Number of minutes of inactivity before the ATI session terminates automatically. Timeout is based on no keyboard activity. Disconnect Time(minutes) option appears when Inactivity Timeout is enabled. 1 to 60 – The ATI user session is closed after the selected number of minutes.
Worksheets B Overview The worksheets in this appendix summarize the configuration options accessed when you select Configuration on the Main Menu. The possible menu selections are displayed with the default settings and the possible settings.
Worksheets Network Interface Configuration Option Settings Network-initiated DSU Loopback (64K CC) [Enable], Disable Data Scrambling (64K CC) Enable, [Disable] V.
Cables and Pin Assignments C Overview The following sections provide pin assignments for the: 7510-A2-GB20-10 Terminal Port EIA-232 Connector V.
Cables and Pin Assignments Terminal Port EIA-232 Connector The Terminal port connects to a PC or VT100-compatible terminal.
Cables and Pin Assignments V.35 User Data Port Connector The following table provides the pin assignments for the 34-position V.35 connector to the User Data terminal equipment.
Cables and Pin Assignments Standard EIA-232-D Crossover Cable A standard crossover cable can be used to connect the Terminal port to an external modem.
Cables and Pin Assignments LAN Adapter Converter and Cable The following figure shows the pin assignments for the: DB25 plug to modular jack converter between the Management port and the 8-conductor LAN Adapter cable, and Custom 8-conductor cable (with modular plugs on both ends) between the converter and the LAN Adapter.
Technical Specifications D Table D-1. Model 7510 DSU Technical Specifications (1 of 2) Specifications Item Housing Height (including feet) 2.1 inches (5.3 cm) Height (without feet) 2.0 inches (5.1 cm) Width 8.7 inches (22.1 cm) Depth (case) 6.2 inches (15.7 cm) Depth (case and connectors) 6.5 inches (16.5 mm) Weight 1.3 pounds (0.6 kg) Power Normal service voltage range Input: 120 Vac +12 Vac, 60 Hz +3 Hz 4.9 watts (max.
Technical Specifications Table D-1. Model 7510 DSU Technical Specifications (2 of 2) Item Specifications Network Interface Data rates 56 kbps and 64 kbps clear channel (CC) LADS data rates 56 kbps and 64 kbps Services supported 4-wire service Network Compatibility ANSI T1.410-1992 and AT&T Technical Reference 62310-1993 56 and 64 kbps meeting desired loop loss DTE Data Port Interface 34-pin V.35 connector Table D-2.
Glossary aggregate A single bit stream that combines two or more bit streams. ASCII American Standard Code for Information Interchange. A 7-bit code that establishes compatibility between data services. ASCII is the standard for data transmission over telephone lines. ASCII Terminal or Printer Devices that can be attached, either locally or remotely, to display or print the DSU’s alarm messages.
Glossary DMI Data Mode Idle. Refers to a sequence of ones transmitted or received on the DDS network. DSR Data Set Ready. An EIA-lead standard for V.24 circuit CT 107; an output signal (DCE-to-DTE). DSU Data Service Unit. Data communications equipment that provides an interface between the DTE and the digital network. DTE Data Terminal Equipment. The equipment, such as computers and printers, that provides or creates data. DTR Data Terminal Ready. An EIA-lead standard for V.
Glossary multiplexing A method for interleaving several access channels onto a single circuit for transmission over the network. node A connection or switching point on the network. non-latching loopback A non-latching loopback can only be initiated or terminated by the 56 kbps network service provider. NS No Signal. A network-reported condition. OOF Out Of Frame. An error condition in which frame synchronization bits are in error. A network-reported condition. OOS Out of Service.
Index Numbers D 511 test pattern, 5-6– 5-7 data port options, A-5– A-7 data port tests, 5-7 defaults, configuration option, 3-3 detecting problems, 4-1 device messages, 6-1– 6-2 name, 3-1 reset, 6-4 display, revision numbers, 6-4 displaying configuration options, 3-3 default configuration, 3-3 identity information, 2-2 DM, data mode LED, 4-10 DTE test, 5-7 DTR, data terminal ready LED, 4-11 A alarm condition, 4-1 LED, 4-9 ASCII, printable characters, 3-1 ATI Configuration menu, 3-3 Control menu, 3-1, 6
Index H N hardware revision number, 6-4 health and status, messages, 4-3– 4-4 identity, 6-4 device name, 3-1 interface connections, 1-4 network status, 4-6 navigating the screens, 2-5 network interface cable, C-5 interface LEDs, 4-10 interface options, A-4 interface status, 4-6 loopbacks, 5-4 performance statistics, 4-7 tests, 5-3 NS, no signal LED, 4-10 K O keyboard functions, 2-5 OK, LED, 4-9 OOF, out of frame LED, 4-10 OOS, out of service LED, 4-10 options configuration areas, 3-3 configuration
Index R T rear panel, connections, 1-4 reset device, 6-4 revision numbers, 6-4 RJ48S network interface cable, C-5 RTS, request to send LED, 4-11 RXD, received data LED, 4-11 technical specifications, D-1 terminal port direct connection, 2-1 options, A-7 test DTE, 5-7 LED, 4-9 network, 5-3 status messages, 4-5 Test menu, 5-1, 5-3, 5-7, 5-9 testing, 4-1, 5-1 troubleshooting, 6-3 TXD, transmitted data LED, 4-11 S safety instructions.
