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Testing

5-3

7975-A2-GB20-40

December 1998

Line Loopback

Line Loopback (LLB) loops the received signal on the network interface back to
the network without change.

98-15931

NTU/LTU

Network

Interface

All 1s

Port

Interface

Framer

EIA-530

Port

CAP

Procedure

To run a Line Loopback:

1. Position the cursor at the Start command next to Line Loopback on the

Network Tests screen.

2. Press Enter.

The Start command is changed to Stop.

3. To manually stop the test, verify that the cursor is positioned at the Stop

command.

4. Press Enter.

Line Loopback cannot be started when a Repeater Loopback, Data Channel
Loopback (DCLB), Remote DCLB, or network-initiated Line Loopback is in
progress.

Содержание Hotwire 7975

Страница 1: ...HOTWIRE 7975 M SDSL STANDALONE TERMINATION UNIT USER S GUIDE Document No 7975 A2 GB20 40 December 1998...

Страница 2: ...n herein will be documented and issued as a new release to this manual Warranty Sales and Service Information Contact your local sales representative service representative or distributor directly for...

Страница 3: ...cables are provided with this product Special cables which may be required by the regulatory inspection authority for the installation site are the responsibility of the customer 7 When installed in t...

Страница 4: ...rmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference...

Страница 5: ...ace Types 1 3 H Front Panel LED Status Indicators 1 4 H Rear Panel Interface Connections 1 4 H SNMP Management Capabilities 1 5 Management Information Base MIB Support 1 5 SNMP Traps Support 1 5 2 Usi...

Страница 6: ...iguring the Unit Using the Internal Switches 3 6 Switchpack Locations 3 7 Switchpack Definitions 3 8 H Accessing and Displaying Configuration Options 3 11 H Configuration Edit Display 3 12 H Configuri...

Страница 7: ...p Test 5 11 H Ending an Active Test 5 12 6 Messages and Troubleshooting H Overview 6 1 H Configuring SNMP Traps 6 2 H Device Messages 6 3 H Troubleshooting 6 5 7 Security H Overview 7 1 H ATI Access L...

Страница 8: ...agement Options A 16 SNMP NMS Security Options A 17 B Standards Compliance for SNMP Traps H SNMP Traps B 1 warmStart B 1 authenticationFailure B 1 linkUp and linkDown B 2 H Enterprise Specific Traps B...

Страница 9: ...rovides instructions for accessing the user interface and navigating through the screens Chapter 3 Initial Startup and Configuration Provides procedures for setting up the user interface and configura...

Страница 10: ...ications network and port interfaces power consumption values and accessory part numbers Glossary Defines acronyms and terms used in this document Index Lists key terms acronyms concepts and sections...

Страница 11: ...uit over varying distances based on the conditions of the 2 wire loop Examples include support for router multiplexer and PBX connections at 128 kbps with distances exceeding 29 000 feet 8 9 km on 24...

Страница 12: ...e ATI Provides a menu driven VT100 compatible terminal interface for configuring and managing the termination unit locally or remotely by Telnet session H Local Management Provides local management us...

Страница 13: ...ame Relay Encapsulated Data 98 15938 Router Frame Relay Encapsulated Data V 35 V 35 V 35 Router 2 048 Mb over SDSL V 35 V 35 V 35 8775 Termination Unit in 8600 DSLAM CO Site 7975 7975 7975 Customer Pr...

Страница 14: ...mation on front panel LEDs refer to Chapter 4 Monitoring the Unit P O W E R A L A R M T E S T D S L D T E 98 15856 7975 M SDSL TM TM Figure 1 2 Hotwire 7975 Standalone Termination Unit Front Panel Rea...

Страница 15: ...as defined in RFC 1215 They may include variable bindings specified in the following MIBs H MIB II RFC 1573 Defines the general objects for use with a network management protocol in TCP IP internets...

Страница 16: ...About the Hotwire 7975 Standalone Termination Unit 1 6 7975 A2 GB20 40 December 1998 This page intentionally left blank...

Страница 17: ...TE Only one asynchronous terminal interface session can be active at a time and another user s session cannot be forced to end To automatically log out a user due to inactivity enable the Inactivity T...

Страница 18: ...u for a login ID and password Login Hotwire Model 7975 LOGIN Login ID Enter Password Ctrl a to access these functions Exit After you enter a valid login ID and password the Main Menu appears If you en...

Страница 19: ...tistics LEDs and device identity information Test Select and cancel tests for the termination unit s interfaces Configuration Display and edit the configuration options Control Change the device ident...

Страница 20: ...Error Statistics Network Performance Statistics Configuration Control Factory Config Configuration Loader Current Configuration Edit Display System Options Communication Protocol Option Communication...

Страница 21: ...ad Configuration From Network Interface Options H Screen function key area This is the area below the dotted line that lists function keys specific to the screen field value choices and system message...

Страница 22: ...invalid data Ctrl k Tab backwards move cursor one field to the left Spacebar Select the next valid value for the field Delete Del Delete character that the cursor is on Up Arrow or Ctrl u Move cursor...

Страница 23: ...ntinue 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 scr...

Страница 24: ...line 2 Select either the function s designated underlined character or press the Tab key until you reach the desired function key Example To save the current screen type s or S Save 3 Press Enter 4 T...

Страница 25: ...een to terminate the session Procedure To end a session with the asynchronous terminal interface 1 Press Ctrl a to go to the screen function key area below the dotted line 2 Save changes if required A...

Страница 26: ...Using the Asynchronous Terminal Interface 2 10 7975 A2 GB20 40 December 1998 This page intentionally left blank...

Страница 27: ...Connecting a system terminal H Providing initial unit identity information or changing existing identity information H Configuring your unit using internal switchpacks or using the Configuration Edit...

Страница 28: ...Power Source Connecting the Unit to an Optional External DC Power Source Use the following procedures only if you want to use the dc power cable Using the dc power cable the Hotwire 7975 Standalone T...

Страница 29: ...h endpoints The system terminal must be a VT100 compatible terminal or a PC running terminal emulation software The system maintenance terminal allows you to view the status of the unit and change con...

Страница 30: ...em Contact C Parker 800 727 2396 pager 888 555 1212 Clear Ctrl a to access these functions ESC for previous menu MainMenu Exit Save The three System entry fields are alphanumeric and provide 128 chara...

Страница 31: ...mes defaulted to allow settings to be made through the Configuration menus Configuring the Unit Using the Configuration Menus Use the Configuration menu branch of the unit to display or change configu...

Страница 32: ...oper static control precautions to prevent damage to equipment If you are not sure of the proper static control precautions contact your nearest sales or service representative Procedure To configure...

Страница 33: ...GB20 40 December 1998 Switchpack Locations Use Figure 3 1 to locate Switchpacks S1 and S2 98 15937 Switchpack S1 S2 Front S2 Rear S1 6 7 8 ON 1 2 3 4 5 6 7 8 ON 1 2 3 4 5 Figure 3 1 Hotwire 7975 Stan...

Страница 34: ...c Port Type OFF EIA 530 RS 449 or X 21 ON V 35 3 Select the unit s timing source Only valid for LTU configured units OFF Internal clock ON External Clock 4 5 6 7 8 Control Sync Port Data Rate refer to...

Страница 35: ...ps 20 x 64 ON OFF ON OFF OFF 1552 kbps 1216 kbps 19 x 64 ON OFF OFF ON ON 1552 kbps 1152 kbps 18 x 64 ON OFF OFF ON OFF 1552 kbps 1088 kbps 17 x 64 ON OFF OFF OFF ON 1552 kbps 1024 kbps 16 x 64 ON OFF...

Страница 36: ...has two banks of flash memory used to hold executable firmware This switch allows you to switch between the two versions of firmware This switch is independent from the position of Switch 1 on Switchp...

Страница 37: ...ent Configuration Configuration Loader Default Factory Configuration Ctrl a to access these functions ESC for previous menu MainMenu Exit Make a selection by placing the cursor at your choice and pres...

Страница 38: ...ESC for previous menu MainMenu Exit Save See Appendix A Configuration Option Tables for a list and explanation of the configuration options available Select To Access the To Configure the Network Netw...

Страница 39: ...argin Threshold 3db Excessive Error Rate Threshold 1E 5 AutoRate Disable DSL Line Rate 144 Circuit Identifier Clear Ctrl a to access these functions ESC for previous menu MainMenu Exit Save Procedure...

Страница 40: ...to upload configurations to and download configurations from a TFTP server To access the Configuration Loader screen follow this menu selection sequence Main Menu Configuration Configuration Loader m...

Страница 41: ...directories filenames and permissions so that anyone using the system has read and write permissions 2 Position the cursor in the TFTP Server IP Address field Enter the TFTP server IP address 3 Posit...

Страница 42: ...sponse main config saveprompt Hotwire Model 7975 SAVE CONFIGURATION Save Changes No WARNING An answer of yes will cause the system to reset as if it had been powered off and on Ctrl a to access these...

Страница 43: ...e downloaded The file name may be a regular path name expression of directory names separated by a forward slash ending with the file name The total path name length can be up to 128 characters 2 Posi...

Страница 44: ...Initial Startup and Configuration 3 18 7975 A2 GB20 40 December 1998 This page intentionally left blank...

Страница 45: ...tion Units on the E1 network You can monitor 7975 Standalone Termination Unit operations by viewing H System and Test Status screens H Highest priority Health and Status messages on the last line of a...

Страница 46: ...n Pt 1 SYNC Pt Failed Pt 1 DTLB Test Active Pt 1 Net Margin Threshold Pt 1 Memory Failed DCLB Test Active Pt 1 Fallback Rate Pt 1 Failure xxxxxxxx 511 Test Active Pt 1 Devise Failed yyyyyyyy Passed La...

Страница 47: ...EER Excessive Error Rate condition has been detected on the network interface at Port 1 The condition is cleared when the error rate falls below the threshold value currently configured Contact netwo...

Страница 48: ...ge What Message Indicates What To Do CPU Failed The CPU failed internal testing 1 Reset the unit and try again DeviceFailed One or more of the 7975 Standalone Termination Unit s integrated circuit chi...

Страница 49: ...y running LLB Test Active Pt 1 A network Line Loopback test is active on Port 1 RLB Test Active Pt 1 A network Repeater Loopback test is active on Port 1 DTLB Test Active Pt 1 A Data Terminal Loopback...

Страница 50: ...00 000 000 000 000 Yes Yes Interval 03 000 000 000 000 000 000 Yes Yes Interval 04 000 000 000 000 000 000 Yes Yes Interval 05 000 000 000 000 000 000 Yes Yes Interval 06 000 000 000 000 000 000 Yes Y...

Страница 51: ...A running total of CRC errors Range 0 65535 This counter resets when the near end data is cleared Current Interval Performance data for the current 15 minutes Interval xx Historical performance data f...

Страница 52: ...Interval Timer 2 DSL Line Rate 2048 kbps Mrgn XmtPw RxGn Complete Near Far Near Far Near Far Near Far Current Int 02 01 03 03 02 02 Yes Yes Interval 01 02 03 02 Yes No Interval 02 02 01 03 03 02 02 Y...

Страница 53: ...ation Unit LEDs can be viewed on the Display LEDs Status screen This ATI status screen is available locally and remotely The 3 groups of LEDs are H General LEDs display the status of the unit H Sync P...

Страница 54: ...is required ALARM Red Off Device failure or Power On Self Test POST is not complete Self test passed TEST Yellow Yellow flashing Off Loopback test or 511 test pattern in progress Self test in progres...

Страница 55: ...C Data Port Tests Device Tests Abort All Tests Ctrl a to access these functions ESC for previous menu MainMenu Exit Select To Network Tests Start and stop tests on the network interface SYNC Data Port...

Страница 56: ...00 00 Pattern Tests Send and Monitor 511 Stop Active hh mm ss Errors 99999 Ctrl a to access these functions ESC for previous menu MainMenu Exit ResetMon Use the Command column to start or stop a test...

Страница 57: ...Port CAP Procedure To run a Line Loopback 1 Position the cursor at the Start command next to Line Loopback on the Network Tests screen 2 Press Enter The Start command is changed to Stop 3 To manually...

Страница 58: ...Position the cursor at the Start command next to Repeater Loopback on the Network Tests screen 2 Press Enter The Start command is changed to Stop 3 To manually stop the test verify that the cursor is...

Страница 59: ...sed to verify the link 98 15939 01 NTU LTU Port Interface Framer EIA 530 Port CAP All 1s NTU LTU Port Interface Framer CAP Local Remote Procedure To run a Remote Send Line loopback 1 Position the curs...

Страница 60: ...pattern 98 15936 NTU LTU EIA 530 Port All 1s NTU LTU Local Remote All 1s 511 Pattern CAP 511 Gen 511 Mon CAP 511 Mon 511 Gen Framer Port Interface Framer Port Interface 511 Pattern Procedure To run a...

Страница 61: ...inal Loopback Start Inactive 00 00 00 Data Channel Loopback Start Inactive 00 00 00 Remote Loopbacks Send Remote DCLB Down Send Inactive 00 00 00 Ctrl a to access these functions ESC for previous menu...

Страница 62: ...face Framer EIA 530 Port CAP All 1s Procedure To run a Data Terminal Loopback 1 Position the cursor at the Start command next to Data Terminal Loopback on the SYNC Data Port Tests screen 2 Press Enter...

Страница 63: ...ll 1s Procedure To run a Data Channel Loopback 1 Position the cursor at the Start command next to Data Channel Loopback on the SYNC Data Port Tests screen 2 Press Enter The Start command is changed to...

Страница 64: ...CLB 1 Position the cursor at the Up or Down selection next to Send Remote DCLB on the SYNC Data Port Tests screen 2 Press the spacebar to select the desired code Up or Down 3 Position the cursor at th...

Страница 65: ...to access these functions ESC for previous menu MainMenu Exit Lamp Test The Lamp test determines whether all LEDs are lighting and functioning properly Procedure To test the LEDs 1 Position the cursor...

Страница 66: ...after it has been running a specified period of time The default is 10 minutes Refer to Table A 3 System Options Test Timeout does not pertain to tests initiated by the network H On each test screen...

Страница 67: ...sages and Troubleshooting 6 Overview There are many messages available to assess the status of the device and contribute to problem resolutions Refer to the following sections H Configuring SNMP Traps...

Страница 68: ...ddress and network destination for each SNMP manager specified H Select the type of SNMP traps to be sent from the 7975 Standalone Termination Unit To configure SNMP Traps follow this menu selection s...

Страница 69: ...tion needed Invalid Character x A nonprintable ASCII character x has been entered Reenter information using valid characters Invalid Data Terminal Initiated Loopback Active Network initiated loopback...

Страница 70: ...ned H No action needed H Enter a security record Password Matching Error Re enter Password Password entered in the Reenter Password field of the Administer Logins screen does not match what was entere...

Страница 71: ...he unit is configured properly Verify it s IP address and communication port usage H Reset the unit Device Fail appears on the System and Test Status screen under Self Test results The unit detects an...

Страница 72: ...rk and data port cables H Run Loopback tests Refer to Chapter 5 Testing H Stop the test or wait for the test to H A test is being executed on the unit check the TEST LED on the front panel H The far e...

Страница 73: ...on option See Table A 5 Telnet Sessions Options in Appendix A Configuration Option Tables ATI Access Levels The 7975 Standalone Termination Unit has two access levels Administrator and Operator The ac...

Страница 74: ...and include an access level Procedure 1 To create a login record follow this menu selection sequence Main Menu Control Administer Logins main control admin_logins Hotwire Model 7975 ADMINISTER LOGINS...

Страница 75: ...aracters characters that can consist of 0 9 a z A Z pound period dash and slash Access Level Administrator Operator NOTE Assign at least one Administrator level Login ID Full access is necessary to ma...

Страница 76: ...iting SNMP access H Disable the SNMP management option Refer to Table A 8 General SNMP Management Options H Assign SNMP community names and access types H Limit SNMP access through validation of the I...

Страница 77: ...his occurs the termination unit connectivity can be restored via a terminal directly connected to the COM port Two methods can be used to restore access to the user interface H Reset COM Port Allows y...

Страница 78: ...y will restore all factory loaded configuration and control settings contained in the Default Factory Configuration area are loaded If no or n is entered or if no selection is made within 30 seconds t...

Страница 79: ...ce the address is assigned you can use the 7975 Standalone Termination Unit s ATI to assign H An IP address for each NMS For SNMP IP Options see Table A 7 SNMP Traps Options Table A 8 General SNMP Man...

Страница 80: ...P Address 126 35 10 1 Port 3 Peer IP Address 126 35 10 2 Port 4 Peer IP Address 126 35 10 3 NTU 8775 MCC MCC Base Address 126 35 1 1 MCC Base Subnet Mask 255 255 0 0 7975 NTU IP Address 126 35 7 2 LTU...

Страница 81: ...Data Port Options Table A 2 Synchronous DTE interface Port System System Options Table A 3 General system options of the unit Communication Port Communication Port Table A 4 Unit s COM port options M...

Страница 82: ...ed 5db to 10db Sets the margin threshold to this value Excessive Error Rate Threshold Possible Settings 1E 4 1E 5 1E 6 1E 7 1E 8 1E 9 Default Setting 1E 6 Determines the error rate at which an excessi...

Страница 83: ...4 2 Mbps unit only Available payload rates are 1600 1664 1728 1792 1856 1920 1984 and 2048 kbps Peer IP Address Possible Settings 000 000 000 001 223 255 255 255 Clear Default Setting 000 000 000 001...

Страница 84: ...or on the rear panel of the unit Payload Rate Possible Settings 64 128 192 256 320 384 448 512 576 640 704 768 832 896 960 1024 1088 1152 1216 1280 1344 1408 1472 1536 1600 1664 1728 1792 1856 1920 19...

Страница 85: ...its from the DTE connected to the synchronous data port DTR Monitors the DTE Ready interchange circuit CD CCITT 108 1 2 When DTR is interrupted all ones are sent to the network RTS Monitors the Reques...

Страница 86: ...ached to this port This loopback is controlled by the Local Loopback interchange circuit LL CCITT 141 DCLB Gives control of the remote DCLBs for the far end port connected to this port to the DTE atta...

Страница 87: ...ll reset the card Test Timeout Possible Settings Enable Disable Default Setting Enable Allows user initiated tests to end automatically The feature should be enabled when the unit is remotely managed...

Страница 88: ...ynchronous Default Setting Asynchronous When Port Use is set to Net Link Port Type controls whether the communication port will be asynchronous or synchronous Asynchronous Configures the communication...

Страница 89: ...ID and password are required to access the asynchronous terminal interface Disable No Login ID and password are required to access the asynchronous terminal interface Port Access Level Possible Settin...

Страница 90: ...Minutes Possible Settings 1 60 Default Setting 5 Number of minutes of inactivity before the session terminates automatically Timeout is based on no keyboard activity H Disconnect Time minutes option a...

Страница 91: ...oaded To access the Telnet Sessions Options screen follow this menu selection sequence Main Menu Configuration Load Configuration From Management and Communication Telnet Session Table A 5 Telnet Sess...

Страница 92: ...ct Time Disable A Telnet session will not be closed due to inactivity Disconnect Time Minutes Possible Settings 1 60 Default Setting 5 Number of minutes of inactivity before a Telnet session terminate...

Страница 93: ...d when the Port Use option on the Communication Port Options menu is set to Net Link If the COM Port IP address is not set 000 000 000 000 the node IP address specified by the Node IP Port will be use...

Страница 94: ...sible Settings 000 000 000 000 223 255 255 255 Clear Default Setting 000 000 000 000 Specifies the Internet Protocol address used to identify each SNMP trap manager 000 000 000 000 223 255 255 255 Ent...

Страница 95: ...Up A linkUp trap is generated when the 7975 Termination Unit recognizes that one of the communication interfaces is operational Down A linkDown trap is generated when the 7975 Termination Unit recogn...

Страница 96: ...The community name must be supplied by an external SNMP manager when that manager attempts to access an object in the MIB Text Field Enter or edit a community name Clear Clears the community name fie...

Страница 97: ...f Managers Possible Settings 1 2 3 4 5 Default Setting 1 Specifies the number of SNMP management systems that can send SNMP messages 1 to 5 Number of trap managers An NMS IP address is required for ea...

Страница 98: ...Configuration Option Tables A 18 7975 A2 GB20 40 December 1998 This page intentionally left blank...

Страница 99: ...ationFailure H linkUp H linkDown warmStart SNMP Trap Description Possible Cause warmStart The unit has reinitialized itself The trap is sent after the unit resets and stabilizes There are no variable...

Страница 100: ...tables in other MIBs The values of ifIndex are the same for all models although not all indexes are supported for each model The ifIndex included with the trap consists of 1 COM Port 2 SDSL E1 Interf...

Страница 101: ...failure Operating software has detected an internal device failure enterpriseTestStart 5 A test is running At least one test has been started on an interface enterpriseConfigChange 6 The configuration...

Страница 102: ...stSendLLBUp Initiates an LLB Up message to the remote unit testSendLLBDown Initiates an LLB Down message to the remote unit H enterpriseTest Start Any one of the following tests is active on the inter...

Страница 103: ...ng sections provide pin assignments H DSL Network Interface Cable H COM Port Interface Cable H EIA 530A Port Interface Connector H EIA 530A to X 21 Interface Cable H EIA 530A to RS 449 Interface Cable...

Страница 104: ...98 15954 Unused Unused Ring Tip Twisted Pair Twisted Pair RJ48C Plug 1 2 3 4 5 6 7 8 RJ48C Plug 1 2 3 4 5 6 7 8 Blue White Orange White Blue White Orange White Blue White Orange White Blue White Oran...

Страница 105: ...or alarms The COM port to PC cable is a 14 foot 26 AWG 8 conductor cable with an 8 position modular plug keyed connector and a DB9 socket connector Figure C 2 The COM port connector is an 8 position k...

Страница 106: ...J6 Signal Direction Pin Number Reserved for future use to DTE Out 1 DCE Received Data to DTE Out 2 Signal Ground 3 DCE Transmit Data from DTE IN 4 DCE Data Terminal Ready from DTE IN 5 DCE Carrier De...

Страница 107: ...ved Data BB 104 From DSU CSU 3 A 16 B Request to Send CA 105 To DSU CSU 4 A 19 B Clear to Send CB 106 From DSU CSU 5 A 13 B Received Line Signal Detector CF 109 From DSU CSU 8 A 10 B DCE Ready CC 107...

Страница 108: ...shown in Table C 3 98 15883 2 14 3 16 17 9 4 19 8 10 7 24 11 2 9 4 11 6 13 3 10 5 12 8 7 14 TD A TD B RD A RD B RXC A RXC B RTS A RTS B RLSD A RLSD B SIG COMMON TT A TT B TD A TD B RD A RD B RXC A RX...

Страница 109: ...ommon 102 8 Transmitted Data 103 To DSU CSU 2 A 9 B Received Data 104 From DSU CSU 4 A 11 B Request to Send 105 To DSU CSU 3 A 10 B Data Channel Received Line Signal Detector 109 From DSU CSU 5 A 12 B...

Страница 110: ...3 8 26 7 25 9 27 12 13 31 11 19 14 10 20 17 35 18 29 30 SHIELD TD A TD B RD A RD B TXC A TXC B RXC A RXC B RTS A RTS B CTS A CTS B DTR RLSD A RLSD B DSR SIG COMMON RL LL RCV COMMON TT A TT B TM SIG CO...

Страница 111: ...4 From DSU CSU 6 A 24 B Request to Send RS 105 To DSU CSU 7 A 25 B Clear to Send CS 106 From DSU CSU 9 A 27 B Receiver Ready RR 109 From DSU CSU 13 A 31 B Data Mode DM 107 From DSU CSU 11 A 29 B Termi...

Страница 112: ...15 12 17 9 4 5 8 6 7 24 11 20 21 18 25 23 A P S R T Y AA V X C D F E B U W H N L NN SHIELD TD A TD B RD A RD B TXC A TXC B RXC A RXC B RTS CTS RLSD DSR SIG COMMON TT A TT B DTR RL LL TM SIG COMMON SH...

Страница 113: ...ar to Send 106 From DSU CSU D Data Channel Received Line Signal Detector 109 From DSU CSU F Data Set Ready 107 From DSU CSU E Data Terminal Ready 108 1 2 To DSU CSU H Transmit Signal Element Timing DT...

Страница 114: ...onal Power Cable The optional power cable is a 14 5 foot 18 AWG stranded cable The connector is terminated at one end with a 6 position Molex 39 01 2060 connector The other end of the cable is termina...

Страница 115: ...er supply supplied with the unit Maximum Power Dissipation 6 watts Cables and Cable Guide Feature Number Description 7900 F1 503 EIA 530A to V 35 Interface Cable 7900 F1 504 EIA 530A to X 21 Interface...

Страница 116: ...Technical Specifications D 2 7975 A2 GB20 40 December 1998 This page intentionally left blank...

Страница 117: ...ting that the device is ready for the DTE to transmit data Usually occurs in response to Request To Send RTS Code Violation This is equivalent to a BPV Used with HDB3 coding format Data Communications...

Страница 118: ...hronous dial networks Frame Alignment Signal A loss of signal LOS error detection Frame Alignment Word A loss of synchronization error detection Federal Communications Commission The Board of Commissi...

Страница 119: ...The LTU is on the network end Out Of Frame An error condition in which frame synchronization bits are in error A reinitialization of the device that occurs at power up or in response to a reset comma...

Страница 120: ...em without directory or file listing TFTP is used where FTP is not available Transmit Data Pin 2 of the EIA 232 interface that is used by the DTE to transmit data to the modem Conversely the modem use...

Страница 121: ...le C 12 DSL Network Interface Cable C 2 Card Failed self test result 4 4 status message 4 3 Circuit Identifier A 3 clocking A 4 COM port resetting 7 5 COM port settings 3 3 Communication Port A 8 Comm...

Страница 122: ...ent requirements D 1 error messages line 24 6 3 error statistics 4 6 ESD precautions 3 6 Excessive Error Rate EER Threshold A 2 F factory default configuration options resetting 7 5 factory defaults 3...

Страница 123: ...iew 8775 Termination Unit 1 2 user s guide v P part numbers D 1 Passed self test result 4 4 Payload Rate A 4 PC connecting 3 3 requirements 3 3 Peer IP Address A 3 performance statistics 4 8 physical...

Страница 124: ...ons A 11 A 12 terminal communication parameters 3 3 connecting 3 3 terminal port direct connection 2 1 test aborting 5 12 Data Channel Loopback 5 9 Data Terminal Loopback 5 8 LED 4 10 Line Loopback 5...

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