Maintenance-Object Repair Procedures
555-233-143
8-454
Issue 1 May 2002
Incoming Call:
1. CO Off-Hook (Seizure): CO applies ground on Tip and applies ringing
voltage
PBX response: Make trunk busy for outgoing calls
2. CO Ringing: CO applies ringing voltage
PBX response: Detect ringing, ring destination
3. PBX Off-Hook (Answer message): Close loop
CO response: Trip ringing, provide loop current
4. PBX On-Hook first (Drop message): Open the Tip-Ring Loop, no loop
current
CO response: Open circuit on Tip
5. CO On-Hook first (Disconnect): Open circuit on Tip, no loop current
Error Log Entries and Test to Clear Values
Table 8-183.
CO Trunk Error Log Entries
Error
Type
Aux
Data
Associated Test
Alarm
Level
On/Off
Board
Test to Clear Value
0
1
0
Any
Any
Any
test port UUCSSpp sh r 1
1 (a)
57347
None
15 (b)
any
Port Audit Update test
(#36)
18
0
busyout trunk
WARNING
OFF
release trunk grp#/mbr#
130(c)
None
WARNING
ON
test port UUCSSpp sh r 2
257 (a)
50176
None
513 (a)
57364
None
MAJOR
MINOR
WARNING
2
ON
769 (a)
57392
None
MAJOR
MINOR
WARNING
OFF
1025 (e)
Any
Demand Diagnostic
test (#3)
MAJOR
MINOR
WARNING
OFF
test port UUCSSpp sh r 2
1281 (e)
Any
Demand Diagnostic
test (#3)
MAJOR
MINOR
WARNING
ON
test port UUCSSpp sh r 3
Continued on next page
Summary of Contents for S8700 Series
Page 50: ...Maintenance Architecture 555 233 143 1 26 Issue 1 May 2002 ...
Page 74: ...Initialization and Recovery 555 233 143 3 12 Issue 1 May 2002 ...
Page 186: ...Alarms Errors and Troubleshooting 555 233 143 4 112 Issue 1 May 2002 ...
Page 232: ...Additional Maintenance Procedures 555 233 143 5 46 Issue 1 May 2002 ...
Page 635: ...status psa Issue 1 May 2002 7 379 555 233 143 status psa See status tti on page 7 406 ...
Page 722: ...Maintenance Commands 555 233 143 7 466 Issue 1 May 2002 ...