MAINTENANCE
S Y S T E M
T R O U B L E
REPORTED
USER-REPORTED
DISCUSS THE TROUBLE
WITH SYSTEM USERS
CAP ALARM
REPORTED
CAP ALARMED
READ PERMANENT
SYSTEM ALARMS
TABLE IN ERROR
L O G :
A N D C H E C K
CIRCUIT BOARDS
AND POWER LED
STATUS
SYSTEM OR CANNOT
ACCESS ERROR LOG
DEFECTIVE
P O W E R
S U P P L Y
C H E C K P O W E R
L E D A N D F A N S
READ (1) PERMANENT SYSTEM
A L A R M S , ( 2 ) T R A N S I E N T
S Y S T E M E R R O R S T A B L E ,
AND/OR (3) MOST RECENT
SYSTEM ERRORS IN TABLE
E R R O R L O G ;
A N D C H E C K C I R C U I T
BOARDS AND POWER SUPPLY
L E D S T A T U S
C P U / M E M O R Y
CIRCUIT FRONTPLANE/
BACKPLANE DIAGNOSTIC
REPLACE
POWER
SUPPLY
TYPE OF TROUBLE INDICATED
BY THE LEDS AND ERROR LOG
ERROR LOG CONFIRMS
USER-REPORTED TROUBLE
PORTS
P O W E R
S U P P L Y
C A B I N E T
OR FANS
C P U / M E M O R Y
SERVICE CIRCUIT
F R O N T P L A N E /
B A C K P L A N E
D I A G N O S T I C
NO ERROR LOG
RESULTS
RECREATE USER-REPORTED TROUBLE
S T A T I O N S T R U N K S O T H E R
I S O L A T E T R O U B L E T O
REPLACEABLE MAINTENANCE
UNIT (SEE TEXT)
RUN
S T A T I O N
T E S T ( S )
SEQUENCE
R U N
T R U N K
TEST (S)
SEQUENCE
( D E P E N D I N G
O N P R O B L E M ,
SEVERITY)
FIRST. WARM
S T A R T . I F
PROBLEM PERSISTS
R E S T O R E
T R A N S L A T I O N S
F R O M T A P E . I F
PROBLEM PERSISTS
E S C A L A T E .
Figure 4-1.
Response to System 25 Trouble Report
4-10
Summary of Contents for Network Adapter 25
Page 1: ...AT T AT T System 25 Installation and Maintenance Manual 555 540 103 B November 1995 ...
Page 18: ...APPENDIX F Administration Error Messages GLOSSARY I N D E X F 1 G 1 I 1 viii ...
Page 31: ...INSTALLATION MOUNTING CENTERS WHEN FLANGES ARE OVERLAPPED Figure 2 2 617A Panel 2 7 ...
Page 33: ...INSTALLATION Z21OA1 ADAPTER Y ADAPTER WP90851 L1 858A ADAPTER Figure 2 3 SIP Adapters 2 9 ...
Page 50: ...INSTALLATION Figure 2 10 Three Cabinet System Front View With Covers Removed 2 26 ...
Page 51: ...INSTALLATION Figure 2 11 Position of Shorting Plugs on CPU Memory Circuit Pack 2 27 ...
Page 72: ...INSTALLATION UPPER ADAPTER MOUNTING CLIP Figure 2 18 Mounting Adapters ...
Page 85: ...INSTALLATION 2 61 ...
Page 92: ...INSTALLATION 2 68 ...
Page 103: ...INSTALLATION Figure 2 32 10B Emergency Transfer Unit 2 78 ...
Page 104: ...INSTALLATION Figure 2 33 Emergency Transfer Unit Connections 2 79 ...
Page 109: ...INSTALLATION Figure 2 35 Attendant Console With DXS Console 2 84 ...
Page 146: ...INSTALLATION 2 119b This page intentionally left blank November 1995 ...
Page 153: ...INSTALLATION This page intentionally left blank 2 124b November 1995 ...
Page 223: ...MAINTENANCE Figure 4 2 Clearing Supply Troubles Sheet 1 of 2 4 47 ...
Page 224: ...MAINTENANCE Figure 4 2 Clearing Power Supply Troubles Sheet 2 of 2 ...
Page 225: ...MAINTENANCE Figure 4 3 Clearing CO Trunk Troubles 4 49 ...
Page 226: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 1 of 4 4 50 ...
Page 227: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 2 of 4 4 51 ...
Page 228: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 3 of 4 4 52 ...
Page 229: ...MAINTENANCE Figure 4 4 Clearing 4 Wire Tie Trunk Troubles Sheet 4 of 4 4 53 ...
Page 231: ...Figure 4 6 Clearing Tie Trunk Troubles Sheet 1 of 5 4 55 ...
Page 232: ...MAINTENANCE 6 7 8 9 10 Figure 4 6 Clearing Tie Trunk Troubles Sheet 2 of 5 4 56 ...
Page 233: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 3 of 5 4 57 ...
Page 234: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 4 of 5 4 58 ...
Page 235: ...MAINTENANCE Figure 4 6 Clearing Tie Trunk Troubles Sheet 5 of 5 4 59 ...
Page 236: ...MAINTENANCE Figure 4 7 Clearing Paging Equipment Troubles ...
Page 250: ...MAINTENANCE Figure 4 9 System Cabinet Backplane Wiring Side Sheet 2 of 2 4 74 ...
Page 251: ...MAINTENANCE Figure 4 10 TDM Signal Designations on Cabinet Backplane 4 75 ...
Page 252: ...MAINTENANCE Figure 4 11 Power Designations on Cabinet Backplane 4 76 ...
Page 263: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 1 of 3 ...
Page 264: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 2 of 3 4 87 ...
Page 265: ...MAINTENANCE Figure 4 12 Clearing Virtual Facilities Troubles Sheet 3 of 3 4 88 ...
Page 271: ...MAINTENANCE Figure 4 13 Clearing Switched Loop Attendant Console Troubles Sheet 1 of 5 ...
Page 272: ...MAINTENANCE 4 13 Clearing Switched Loop 2 of 5 Console Troubles Sheet 4 95 ...
Page 273: ...MAINTENANCE Figure 4 13 Clearing Switched 3 of 5 Loop Attendant Console Troubles Sheet 4 96 ...
Page 274: ...MAINTENANCE 4 13 Clearing Switched 4 of 5 Console Troubles 4 97 ...
Page 321: ...APPENDIX E Administration Codes and Data This page is intentionally blank E 2 b ...