MAINTENANCE
CLEARING USER-DETECTED TROUBLES
User-reported troubles are usually associated with voice or data terminal
equipment or trunks. They can result from system-detected errors and are
often solved by clearing system error conditions or alarms.
This section presents trouble-clearing techniques and procedures for user-
reported troubles.
Maintenance routines for data terminals and Asynchronous Data Units (ADUs)
are not contained in this section (although some basic routines for clearing
administration equipment troubles are included). Manuals covering data
terminals and data modules are listed in Section 5, “References.”
Maintenance for auxiliary devices that are customer provided is the
responsibility of the user.
Administration Equipment Troubles
Administration equipment that is connected to the system on a dedicated
basis includes the System Administration Terminal (SAT), Station Message
Detail Recording (SMDR), and Digital Tape Unit.
Symptoms: .
Terminal dead or functioning intermittently. Messages contain
“garbage” characters.
Procedures:
1.
2.
3.
4.
Check ac power connection.
Check cabling to cabinet.
Check administered settings for SAT (see the Administration Manual).
Settings should be for 8-bit word length, no parity, space (0) for bit
8;baud rate 1200.
Check pin 20 of
steady at greater
( g r o u n d ) .
EIA connector for DTR signal. Signal should be
than or equal to +3.0 volts with respect to pin 7
4-81
Содержание Network Adapter 25
Страница 1: ...AT T AT T System 25 Installation and Maintenance Manual 555 540 103 B November 1995 ...
Страница 18: ...APPENDIX F Administration Error Messages GLOSSARY I N D E X F 1 G 1 I 1 viii ...
Страница 29: ...INSTALLATION NOTE 9 WIDE MOUNTING CENTERS ARE 8 1 2 APART FLANGES OVERLAPPED Figure 2 1 10B ETU 2 5 ...
Страница 31: ...INSTALLATION MOUNTING CENTERS WHEN FLANGES ARE OVERLAPPED Figure 2 2 617A Panel 2 7 ...
Страница 33: ...INSTALLATION Z21OA1 ADAPTER Y ADAPTER WP90851 L1 858A ADAPTER Figure 2 3 SIP Adapters 2 9 ...
Страница 50: ...INSTALLATION Figure 2 10 Three Cabinet System Front View With Covers Removed 2 26 ...
Страница 51: ...INSTALLATION Figure 2 11 Position of Shorting Plugs on CPU Memory Circuit Pack 2 27 ...
Страница 72: ...INSTALLATION UPPER ADAPTER MOUNTING CLIP Figure 2 18 Mounting Adapters ...
Страница 85: ...INSTALLATION 2 61 ...
Страница 92: ...INSTALLATION 2 68 ...
Страница 103: ...INSTALLATION Figure 2 32 10B Emergency Transfer Unit 2 78 ...
Страница 104: ...INSTALLATION Figure 2 33 Emergency Transfer Unit Connections 2 79 ...
Страница 109: ...INSTALLATION Figure 2 35 Attendant Console With DXS Console 2 84 ...
Страница 146: ...INSTALLATION 2 119b This page intentionally left blank November 1995 ...
Страница 153: ...INSTALLATION This page intentionally left blank 2 124b November 1995 ...
Страница 156: ...Figure 2 57 278A Adaptor Plug Positions for Connecting TN763 Circuit Pack to Paging System 2 127 ...
Страница 223: ...MAINTENANCE Figure 4 2 Clearing Supply Troubles Sheet 1 of 2 4 47 ...
Страница 224: ...MAINTENANCE Figure 4 2 Clearing Power Supply Troubles Sheet 2 of 2 ...
Страница 225: ...MAINTENANCE Figure 4 3 Clearing CO Trunk Troubles 4 49 ...
Страница 226: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 1 of 4 4 50 ...
Страница 227: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 2 of 4 4 51 ...
Страница 228: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 3 of 4 4 52 ...
Страница 229: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 4 of 4 4 53 ...
Страница 231: ...Figure 4 6 Clearing Tie Trunk Troubles Sheet 1 of 5 4 55 ...
Страница 232: ...MAINTENANCE 6 7 8 9 10 Figure 4 6 Clearing Tie Trunk Troubles Sheet 2 of 5 4 56 ...
Страница 233: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 3 of 5 4 57 ...
Страница 234: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 4 of 5 4 58 ...
Страница 235: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 5 of 5 4 59 ...
Страница 236: ...MAINTENANCE Figure 4 7 Clearing Paging Equipment Troubles ...
Страница 250: ...MAINTENANCE Figure 4 9 System Cabinet Backplane Wiring Side Sheet 2 of 2 4 74 ...
Страница 251: ...MAINTENANCE Figure 4 10 TDM Signal Designations on Cabinet Backplane 4 75 ...
Страница 252: ...MAINTENANCE Figure 4 11 Power Designations on Cabinet Backplane 4 76 ...
Страница 263: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 1 of 3 ...
Страница 264: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 2 of 3 4 87 ...
Страница 265: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 3 of 3 4 88 ...
Страница 271: ...MAINTENANCE Figure 4 13 Clearing Switched Loop Attendant Console Troubles Sheet 1 of 5 ...
Страница 272: ...MAINTENANCE 4 13 Clearing Switched Loop 2 of 5 Console Troubles Sheet 4 95 ...
Страница 273: ...MAINTENANCE Figure 4 13 Clearing Switched 3 of 5 Loop Attendant Console Troubles Sheet 4 96 ...
Страница 274: ...MAINTENANCE 4 13 Clearing Switched 4 of 5 Console Troubles 4 97 ...
Страница 305: ...APPENDIX C System Additions or Changes Figure C 1 Typical System 25 Port Circuit Pack C 4 November 1995 ...
Страница 321: ...APPENDIX E Administration Codes and Data This page is intentionally blank E 2 b ...
Страница 341: ...APPENDIX E Administration Codes and Data Table E J MET Set Button Defaults Cannot be changed E 22 ...