Avaya S8700 - Page 1176

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
2
OFF
1025 (e) Any Demand Diagnostic
test (#3)
MAJOR
MINOR
WARNING
2
OFF test port UUCSSpp sh r 2
1281 (e) Any Demand Diagnostic
test (#3)
MAJOR
MINOR
WARNING
2
ON test port UUCSSpp sh r 3
Continued on next page