MAINTENANCE
5.
Listen for dial tone from the accessed trunk. If dial tone is not
present, isolate the fault to a trunk port CP or location in the trunk
access equipment, etc., using a test set.
6.
If dial tone is present, dial a working outside number. Verify that the
call is complete.
7.
If trunk is busy, fast busy tone is heard. If a nonport trunk was
dialed, fast busy tone is heard.
Incoming Trunk Problems
Symptoms:
Incoming trunks (of any type) not working properly.
Procedures:
1.
Place an incoming call through the troubled trunk.
2. At the SAT, check the trunk translations to be sure this trunk has
been properly translated. (See the Administration Manual.)
Error Log Interpretation: Loop-Start Trunks
Procedures:
1.
2.
3.
4.
5.
Check Error Log for messages pertaining to loop-start trunks.
If “no loop current on incoming call” is displayed, no loop current
was detected on an incoming call. The CP detected ringing, but not
loop current when it closed the loop. In this case, the CO facility is
probably good, but either the current sensor on the CP is faulty or
the CO battery circuit is faulty.
Switch trunk ports, and see if the problem moves to the new loop-
s t a r t t r u n k .
If the problem does not move, the loop-start CP is faulty and must
b e r e p l a c e d .
If the problem moves, the fault is with the CO. Notify CO personnel
through the proper channels.
4-90
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 ...