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Messages and Troubleshooting

6-4

7510-A2-GB20-00

March 1997

Table 6-2.

Troubleshooting (2 of 2)

Symptom

Solutions

Possible Cause

Not receiving data;
DSU is not
responding.

DDS line rate/speed has
changed.

Excessive BPVs causing
DSU to become stuck in
Autobaud mode.

Excessive Loop Loss
causing DSU to become
stuck in Autobaud mode.

1. Verify that your subscriber loop is

running at 56 or 64 CC kbps.

2. If getting Excessive BPVs, verify

that you do not have a bad cable.
If the cable is good, contact the
network provider.

3. If getting excessive Loop Loss

(dB) indications, install a higher
quality cable. Refer to

Table D-2

in Appendix D,

Model 7510

in Appendix D,

Model 7510

DSU LADS Connection
Distances

4. If the DDS Line Rate (Kbps) field

shows Autobaud, the DSU may
be stuck in Autobaud mode.
Configure Line Rate (Kbps) for
56 or 64 kbps.

5. Run Loopback tests. Refer to

Running Network Tests

in of

Chapter 5.

Power-Up Self-Test
fails. Only Alarm
LED is on after
power-up.

The DSU has detected an
internal hardware failure.

Reset the DSU and try again.

Contact your service
representative.

Resetting the DSU

The DSU can be reset locally or remotely.

To reset the DSU, follow this menu selection sequence:

Main Menu

→

Control

→

Reset Device

The DSU reinitializes itself, performing a Device Self-Test. Refer to

Self-Test

Results Messages

, Table 4-3.

Displaying DSU Identity Information

To display the DSU’s system name, location, contact, serial number, model
number, and software and hardware revision numbers, follow this menu selection
sequence:

Main Menu

→

Status

→

Identity

Содержание 7510

Страница 1: ...E CHANGE Please note that the area code for Paradyne Corporation in Largo Florida has changed from 813 to 727 For any Paradyne telephone number that appears in this manual with an 813 area code dial 727 instead ...

Страница 2: ...MODEL 7510 DSU USER S GUIDE Document No 7510 A2 GB20 00 March 1997 ...

Страница 3: ...s the right to revise this publication and to make changes from time to time in the contents hereof without obligation of Paradyne Corporation to notify any person of such revision or changes Changes and enhancements to the product and to the information herein will be documented and issued as a new release to this manual Trademarks All products and services mentioned herein are the trademarks ser...

Страница 4: ...s Terminal Interface Connecting to the Terminal Port 2 1 Initiating an ATI Session 2 2 Screen Format Types 2 3 What Affects Screen Displays 2 3 Screen Work Areas 2 4 Navigating the Screens 2 5 Keyboard Keys 2 5 Screen Function Keys 2 6 Switching to the Screen Function Key Area 2 7 Ending an ATI Session 2 8 3 Customizing the DSU Identifying the Device and System 3 1 Saving Configuration Options 3 2...

Страница 5: ...LEDs 4 11 5 Testing Accessing the Test Menu 5 1 Running Network Tests 5 3 CSU or External Network Loopback 5 4 DSU or Internal Network Loopback 5 5 Send V 54 Up Down Sequences 5 5 511 Test Pattern for the Network 5 6 Running Data Port Tests 5 7 Local Loopback 5 8 511 Test Pattern for the DTE 5 8 Running the Lamp Test 5 9 Ending an Active Test 5 10 6 Messages and Troubleshooting Messages and Troubl...

Страница 6: ...enu A 5 Terminal Port Options A 7 B Worksheets Overview B 1 Configuration Worksheets B 1 C Cables and Pin Assignments Overview C 1 Terminal Port EIA 232 Connector C 2 V 35 User Data Port Connector C 3 Standard EIA 232 D Crossover Cable C 4 LAN Adapter Converter and Cable C 5 Modular RJ48S DDS Network Interface Cable C 5 D Technical Specifications Glossary Index ...

Страница 7: ...or setting up the user interface and DSU configuration Chapter 4 Monitoring the DSU Describes monitoring details about the LEDs DSU status and network statistics Chapter 5 Testing Provides details about available tests and test setup Chapter 6 Messages and Troubleshooting Provides information on device messages and troubleshooting Appendix A Configuration Option Tables Contains all configuration o...

Страница 8: ...ent 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 ...

Страница 9: ...6 and 64 kbps full duplex as a limited distance modem Autorating Automatically adjusts to the detected line rate Data Port Rates Automatically adjusts to the DDS or LADS operating rates Asynchronous Terminal Interface ATI Provides a menu driven VT100 compatible interface for configuring and managing the DSU Local Management Provides local management using an asynchronous terminal connection throug...

Страница 10: ...the DSU at each location provide the LAN interconnection DDS Network 497 15084 01 DSU DSU Router Router The DSU can also be used in a Frame Relay network Frame Relay Network 497 15271 DSU DSU Router Router Two DSUs can be connected back to back to act as Local Area Data Sets 497 15236 DSU DSU Router Router 56 Kbps Table D 2 in Appendix D shows the maximum distances for LADS applications ...

Страница 11: ...ators see Monitoring the DSU Chapter 4 O K A L A R M T E S T D M O O S O O F N S T X D 1 0 3 R X D 1 0 4 R T S 1 0 5 C T S 1 0 6 D T R 1 0 8 System Network Port 497 15245 7510 DSU 56 64K Rear Panel Interfaces The following illustration shows the physical interfaces of the DSU Information about the installation of the DSU is contained in the Model 7510 DSU Startup Instructions Network Modem Termina...

Страница 12: ...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 Terminal port settings cannot be changed from the ATI ...

Страница 13: ...st Configuration Control Ctrl a to access these functions Exit Î ÎÎ Entry to all of the DSU s tasks begins at the Main Menu screen which has four menus or branches Select To Status View results of diagnostic tests network status of interfaces statistics LEDs and DSU identity information Test Select and cancel tests for the DSU s interfaces Configuration Display and edit the configuration options C...

Страница 14: ...Three types of screen formats are available on the ATI Use the screen format To Menu selection Display a list of available functions for user selection Input Add or change information on a screen Input or edit fields that have an Underline in the field value or selection See Screen Work Areas Display Display configuration information and results from performance and DSU specific tests Display only...

Страница 16: ...or to the previous field Ctrl k Select the next valid value for the field Spacebar Delete character that the cursor is on Delete Del Move cursor up one field within a column on the same screen Up Arrow or Ctrl u Move cursor down one field within a column on the same screen Down Arrow or Ctrl d Move cursor one character to the right in a text field Right Arrow or Ctrl f Move cursor one character to...

Страница 17: ...ield will appear Continue pressing the spacebar to scroll through other valid values Screen Function Keys All screen function keys located below the dotted line operate the same way upper or lowercase throughout the screens For the screen function Select And press Return to MainMenu M or m Return to the Main Menu screen Exit E or e Terminate the async terminal session Save S or s Save information ...

Страница 19: ...n 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 ...

Страница 20: ...E NAME Device Name Node A Clear System Name ________________________________________ Clear System Location ________________________________________ Clear System Contact ________________________________________ Clear Ctrl a to access these functions ESC for previous menu MainMenu Exit Save Î Î ÎÎ ÎÎ Fields on the Device Name screen are null until you enter values Allowable values are any printable ...

Страница 21: ...the cursor in the System Contact field Enter the name and contact information for the person responsible for the unit The maximum length of System Contact is 127 characters 5 Save the Device Name screen information as shown in the next section Saving Configuration Options When changes are made to the configuration options the changes must be saved to take effect Use the Save key or Save Configurat...

Страница 22: ...ion Set Current Configuration The DSU s active set of configuration options Default Factory Configuration A read only configuration area containing the factory default configuration options If the factory default settings do not support your network s configuration customize the configuration options for your application Accessing and Displaying Configuration Options To display the configuration o...

Страница 23: ...s message on the last line of all screens Network Interface Status screen Network Performance Statistics screen LEDs on the ATI Status screen or the DSU s front panel Table 4 1 shows the available indicators of alarm conditions on the network interface and the User Data port Table 4 1 Alarm Indicator Locations Alarm Condition Status Screen Specific LED Crossed Pairs Y N No Signal NS Y Y Out of Ser...

Страница 25: ...s are on and Network Performance Statistics are active 1 Verify that the remote site is in service 2 Contact network provider Out of Frame hhh mm ss1 DSU is detecting an out of frame condition associated with Receiving out of frame code from the network DSU detecting out of frame errors with 64 kbps CC data rate DSU unable to synchronize local receiver circuit with line signal 1 Verify that the li...

Страница 26: ...no status messages to display No action needed Self Test Results The results of the last power up or reset self test appear in the middle column of the System and Test Status screen Table 4 3 Self Test Results Messages Message What Message Indicates What To Do Device Fail One or more of the DSU s integrated circuit chips has failed device level testing 1 Reset the DSU and try again 2 Call your ser...

Страница 27: ...on codes stop If the network service is 64 kbps CC the network loopback is latching This condition can only occur when the Network Interface option Network initiated DSU Loopback 64K CC is enabled Refer to Network Interface Options Table A 2 V 54 initiated DSU LB Active A DSU loopback is active that was initiated by the detection of a V 54 sequence originated by the remote unit This condition can ...

Страница 28: ... Status follow this menu selection sequence Main Menu Status Network Interface Status Table 4 5 describes the contents of the Network Interface Status screen Table 4 5 Network Interface Status Screen Contents Field Status What the Status Indicates Line Rate Kbps 56 Kbps 64 CC 64 LADS Line rate on the network interface Autobaud indicates the DSU is trying to determine the network line 64 LADS Autob...

Страница 29: ... MainMenu Exit Refresh ClrStats Î Î ÎÎ ÎÎ All counts show the number of occurrences since the last reset of the counters No Signal Count is the number of occurrences of a No Signal condition Out of Service Count is the number of occurrences of an Out of Service OOS condition Out of Frame Count is the number of occurrences of an Out of Frame OOF condition Excessive BPV Count is the number of times ...

Страница 30: ...nterface Port LEDs display the activity on the user data DTE port To view the LED status screen follow this menu selection sequence Main Menu Status Display LEDs main status leds Device Name Model 7510 DISPLAY LEDS SYSTEM NETWORK DTE OK ALARM TEST DM OOS OOF NS TXD RXD RTS CTS DTR ESC for previous menu MainMenu Exit Refresh Î Î ÎÎ ÎÎ When viewed via the ATI the status display screen is updated app...

Страница 31: ...g 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 the Troubleshooting section in Chapter 6 TEST ON Test in progress Test can be initiated locally remotely or from the network Includes power up self test ...

Страница 32: ...F 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 Health and Status Messages Table 4 2 OOF Out of Frame ON DSU is detecting an out of frame condition Refer to Health and Status Messages Table 4 2 NS No Signal ON DDS network interface detects no signal Refer to Health and Status Messages Table 4 2 ...

Страница 33: ...ta ON Sending all 0s to the DTE OFF Sending all 1s to the DTE Blinking User data is being transferred RTS Request to Send ON DTE is activating a control signal to indicate readiness to transmit data CTS Clear to Send ON DSU is activating a control signal to indicate to the DTE that it can start sending data DTR Data Terminal Ready ON DTE is activating a control signal to indicate readiness for ope...

Страница 35: ...er to Data Port Options Table A 3 Local Loopback User DTE via CT141 Control via CT141 can be disabled Refer to Data Port Options Table A 3 Network initiated 56 kbps DSU Loopback Non latching loopback DDS Network Cannot be disabled by user Network initiated 64 kbps CC DSU Loopback Latching loopback DDS Network Includes optional data scrambling and uses 25 second timer to detect the network sequence...

Страница 37: ...n 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 DSU CSU DTE Interface Aggregate DTE Port DDS Network Port 496 15144 CSU Loopback ...

Страница 38: ...s The local DSU can send an ITU T V 54 Up or Down sequence to request the activation or termination of a DSU digital loopback of a remote unit This is the same as the DSU Loopback shown above except the test is activated remotely The DSU can send H In band V 54 Up activation code to request a Remote DSU Loopback V 54 Loop 2 at the remote DSU or H In band V 54 Down deactivation code to request the ...

Страница 39: ...uration of the test is displayed Procedure To run a Monitor 511 test 1 Position the cursor at the Start command next to Monitor 511 on the Network 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 i...

Страница 41: ... that the cursor is positioned at the Stop command 4 Press Enter The duration of the test is displayed DSU CSU DTE Interface Aggregate DDS Network Port 496 15145 DTE Port Local Loopback 511 Test Pattern for the DTE This test sends or monitors a 511 test pattern over the User Data Port interface Procedure To run a Send 511 test 1 Position the cursor at the Start command next to Send 511 on the Data...

Страница 42: ...e external equipment to provide the clock for the 511 pattern on the interchange circuit CT113 TT for timing the incoming pattern Refer to V 35 User Data Port Connector in Appendix C Running the Lamp Test The DSU supports a Lamp test from the Test menu to determine whether all LEDs light up During the Lamp test all LEDs blink simultaneously once per second When you stop the Lamp test the LEDs are ...

Страница 43: ... 1 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 On each test screen is a command column Pressing Return when the cursor is on the Stop command stops the test Use the Abort All Tests selection from the Test menu to stop all tests running on all interfaces with the exception of network...

Страница 44: ...ble 6 1 Device Messages 1 of 2 Device Message What Message Indicates What To Do Command Complete Action requested has successfully completed No action needed Invalid Character x A nonprintable ASCII character has been entered Reenter information using valid characters Invalid Network Initiated CSU or DSU Loopback Active Network initiated loopback was in progress when another selection was made No ...

Страница 45: ...selected Wait until other test ends and message clears Abort all tests from the Test menu screen Stop the test from the same screen the test was started from 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 Contact service provider if test initiated by the network Wait until the other tes...

Страница 46: ...n Connecting to the Terminal Port in Chapter 2 3 Power the DSU on and off and try again Device Fail appears on the System and Test Status screen under Self Test results The DSU detects an internal hardware failure Power the DSU off and on and try again Contact your service representative An LED is not lit LED is burned out Run the Lamp test If the LED in question does not flash with the other LEDs...

Страница 47: ...ADS Connection Distances 4 If the DDS Line Rate Kbps field shows Autobaud the DSU may be stuck in Autobaud mode Configure Line Rate Kbps for 56 or 64 kbps 5 Run Loopback tests Refer to Running Network Tests in of Chapter 5 Power Up Self Test fails Only Alarm LED is on after power up The DSU has detected an internal hardware failure Reset the DSU and try again Contact your service representative Re...

Страница 48: ...nfigure 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 Terminal Port Terminal Port Options Table A 4 ATI NOTE All changes to configuration options must be saved Refer to Saving Configuration Options in Chapter 3 Configuration Edit Display System Network Data Por...

Страница 49: ...ate DDS Line Rate Kbps option appears when Operating Mode is set to DDS NOTE Setting the actual data rate will result in minimum power up time Configuring the actual data rate is recommended after initial installation 56 56 kbps line rate 64CC 64 kbps Clear Channel on a 72 kbps circuit Autobaud This setting is automatically changed to the actual operating line rate of 56 kbps or 64CC as soon as th...

Страница 50: ...nabling when the unit is managed remotely through the IMC to avoid the requirement to terminate the test manually Enable User initiated loopback and pattern tests end when test duration is reached Disable Tests must be terminated manually from the Network Tests screen Refer to Running Network Tests in Chapter 5 NOTE Tests commanded by the DTE or network initiated tests are not affected by this tes...

Страница 51: ...t and stop a latching DSU loopback Disable DSU will not respond to a DSU loopback initiated by the network Data Scrambling 64K CC Possible Settings Enable Disable Default Setting Disable Data scrambling is used to suppress the possible simulation of network initiated DSU latching loopback commands by application data Data Scrambling 64K CC option appears when Operating Mode is set to DDS in Table ...

Страница 52: ...trol is done through the Interchange Circuits specified by the V 54 standard NOTE Refer to Running Network Tests in Chapter 5 Disable No local or remote loopbacks can be initiated by the DTE Local A local loopback can be controlled by the DTE via the Interchange Circuit LL CT141 as specified by V 54 The DTE port remains in loopback as along as LL remains on Aborting the loopback from the ATI has n...

Страница 53: ...rced On CTS is always forced on after the unit is powered up with a successful self test Circuit Assurance With circuit assurance CTS operates the same as the Standard option except that CTS will also be deasserted when CMI codes are being received RLSD Control Possible Settings Standard Forced On Default Setting Standard Specifies the operation of the Interchange Circuit CT109 Received Line Signa...

Страница 54: ...l Port Table A 4 Terminal Port Options 1 of 2 Monitor DTR Possible Settings Enable Disable Default Setting Enable Specifies monitoring of the Data Terminal Ready DTR control lead Enable Standard operation of the DTR control lead Disable DTR is ignored Some external device connections may require this setting Inactivity Timeout Possible Settings Enable Disable Default Setting Disable Provides autom...

Страница 55: ...es 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 ...

Страница 56: ...the Main Menu The possible menu selections are displayed with the default settings and the possible settings Configuration Worksheets System Configuration Option Settings Default in Bold Operating Mode DDS LADS DDS Line Rate Kbps 56 64CC Autobaud LADS Timing Internal External Receive LADS Line Rate Kbps 56 64 Test Timeout Enable Disable Test Duration min 1 120 10 ...

Страница 57: ...old Invert Transmit Clock Enable Disable Port DTE Initiated Loopbacks Disable Local Remote Both Bilateral Loopback Enable Disable Carrier Control by RTS Constant Switched CTS Control Standard Follow RTS Forced On Circuit Assurance RLSD Control Standard Forced On DSR Control Standard Forced On On During Test Monitor DTR Enable Disable Terminal Port Configuration Option Settings Default in Bold Moni...

Страница 58: ...Assignments C Overview The following sections provide pin assignments for the Terminal Port EIA 232 Connector V 35 User Data Port Connector Standard EIA 232 D Crossover Cable LAN Adapter Converter and Cable Modular RJ48S DDS Network Interface Cable ...

Страница 59: ...ects to a PC or VT100 compatible terminal Signal Direction Pin Transmit Data TXD To DSU In 2 Received Data RXD From DSU Out 3 Request to Send RTS To DSU In 4 Clear to Send CTS From DSU Out 5 Data Set Ready DSR From DSU Out 6 Signal Ground SG 7 Carrier Detect CD From DSU Out 8 Data Terminal Ready DTR To DSU In 20 ...

Страница 60: ...a Set Ready DSR 107 From DSU Out E Received Line Signal Detector RLSD or LSD 109 From DSU Out F Data Terminal Ready DTR 108 1 2 To DSU In H Remote Loopback RL 140 To DSU In N Local Loopback LL 141 To DSU In L Transmitted Data TXD 103 To DSU In P A S B Received Data RXD 104 From DSU Out R A T B Transmitter Signal Element Timing DTE Source XTXC or TT 113 To DSU In U A W B Receiver Signal Element Tim...

Страница 61: ...ernal modem Pin 1 Pin 14 Pin 13 Pin 25 Pin 1 Pin 14 Pin 13 Pin 25 P2 Plug Chassis Ground TXD RXD RTS DSR Signal Ground CD RLSD RXC DTR XTXC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Pin 97 15180 01 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 P1 Chassis Ground TXD RXD RTS DSR Signal Ground CD RLSD RXC DTR XTXC Pin P2 P1 Plug ...

Страница 62: ... Ground Unused Plug to Modular Jack Plug to LAN Adapter 496 15179 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 Tx Clock Rx Data Signal Ground Tx Data DTR CD RTS Rx Clock Management Port DB25 Plug 8 Position Modular Jack 15 3 7 2 20 8 4 17 1 2 3 4 5 6 7 8 Plug to Modular Jack Converter Cable Modular RJ48S DDS Network Interface Cable Network access is via a 14 foot modular cable with an RJ48S keyed plug connecto...

Страница 63: ...at 120 Vac Approvals FCC Part 15 FCC Part 68 Safety Certifications Emissions Class A digital device Refer to the equipment s label for Registration Number Refer to the equipment s label for approvals on product Class A digital apparatus Interface and Connectors 25 pin D subminiature connector 34 pin MS34 connector EIA 232 ITU V 24 ISO 2110 for Terminal Port ITU V 35 ISO 2593 for DTE Port Physical ...

Страница 64: ...rk 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 Model 7510 DSU LADS Connection Distances Wire Diameter AWG Data Rate kbps 19 Gauge 0359 or 9122 mm 22 Gauge 0253 or 643 mm 24 Gauge 0201 or 511 mm 26 Gauge 0159 or 404 mm 56 10 84 mi 17 45 km 6 4 mi 10 3 km 4 50 mi 7 24 km 3 34 m...

Страница 65: ...to which separate components are attached Consultative Committee on International Telegraphy and Telephony See ITU Carrier Detect A signal indicating that energy exists on the transmission circuit Associated with Pin 8 on an EIA 232 interface An independent data path Control Mode Idle A control signal sent over the DDS line to indicate that no data is being sent Communications port A computer s se...

Страница 66: ...other as quickly as possible The capability to transmit in two directions simultaneously High Level Data Link Control A communications protocol defined by the International Standards Organization ISO A shared boundary between functional units International Telecommunication Union formerly known as CCITT An advisory committee established by the United Nations to recommend communications standards a...

Страница 67: ...s destination A router helps achieve interoperability and connectivity between different vendor s equipment regardless of protocols used An EIA standard for the 25 pin DCE DTE interface Same as EIA 232 Request to Send An EIA lead standard for V 24 circuit CT 105 an input signal DTE to DCE Received Clock An EIA lead standard for V 24 circuit CT 115 an output signal DCE to DTE Received Data An EIA l...

Страница 68: ...menu 3 1 6 4 crossover EIA 232 cable C 4 CTS clear to send LED 4 11 customer configuration areas 3 3 D 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...

Страница 69: ...ce 6 1 health and status 4 3 4 4 self test results 4 4 test status 4 5 N 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 O OK LED 4 9 OOF out of frame LED 4 10 OOS out of service LED 4 10 options configuration areas 3 3 configuration tables A 1 configuratio...

Страница 70: ...istics of network performance 4 7 status indicators on front panel 1 3 network interface 4 6 of DSU 4 2 4 3 test messages 4 5 Status menu 4 2 4 6 4 7 4 8 switching screen areas 2 7 system device name field 3 1 LEDs 4 9 System and Test Status branch 4 2 System Contact 3 1 System Location 3 1 System Name 3 1 system name 6 4 T technical specifications D 1 terminal port direct connection 2 1 options A...

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