Al1Pls; Apsb - Fujitsu FLM 150 ADM Maintenance And Trouble Clearing

Maintenance and Trouble Clearing
FJTU-320-515-480
3.6

AL1PLS

Table 3-4: AL1PLS (All-Ones Pulse Generated)—Standing Condition
AID
Direction
Type
T1 NA
T3 RCV
3.7

APSB

Table 3-5: APSB (Automatic Protection Switching Byte Failure)—Alarm Event
AID
Direction
Type
OC3 TRMT/RCV
Issue 9, May 1999
Probable Cause
The internal all-ones test signal
has been connected to the external
clock output port (T1) for test
purposes.
The internal all-ones test signal
has been connected to the DS3
channel (T3) for test purposes.
Probable Cause
An automatic protection switching
(APS) channel byte failure. The
APS bytes (K1/K2) are in an invalid
state.
FNC and FNC Customer Use Only
Suggested Corrective Action
Check to see if testing is complete before
disconnecting the test signal.
Check to see if testing is complete before
disconnecting the test signal.
Suggested Corrective Action
• Check for OC-3 near- and far-end
optical channel unit failures.
• Check for failure indicators in the
HS1A-AD1 unit. To replace the unit,
refer to Section 4.10, Replacing the
High-Speed Switch Control (HS1A)
Unit.
Vol. ll, Page 480.3-8
3.6: AL1PLS