Threshold Violations-Line - Fujitsu FLM 150 ADM Maintenance And Trouble Clearing

Maintenance and Trouble Clearing
FJTU-320-515-480
3.70

Threshold Violations-Line

The following are the definitions for the line threshold violations:
• CVL: Coding Violation count–Line
• ESL: Errored Second count–Line
• SEFSL: Severely Errored Framing Second count–Line
• SESL: Severely Errored Second count–Line
• UASL: Unavailable Second count–Line
Table 3-68: Threshold Violations-Line (T-CVL, T-ESL, T-SESL, T-UASL)—
AID Type and
Direction
MONTYPE
T1
CVL
ESL
SESL
(clock and
LC1A-D1E or
LC1A-D1E2 unit
installed)
T3
CVL
ESL
SESL
OC3 and EC1
CVL
ESL
SESL
UASL
OVTG
ESL
SESL
UASL
CVL
SEFSL
OC12
UASL
Issue 9, May 1999
Transient Conditions
Probable Cause
NA Faulty or missing
external clock input
signal
TRMT • The signal input
to the shelf
contains an AIS.
• Faulty input
cable.
• Faulty signal
from subscriber.
• Faulty MC1A
plug-in unit.
• Improperly set
threshold.
FNC and FNC Customer Use Only
3.70: Threshold Violations-Line
Suggested Corrective Action
• Check for problems with external timing
source.
• Check for bad clock-input cable.
• Inspect and clear alarms from the upstream
asynchronous equipment for an AIS
indication.
• Verify the proper cable connection between
the FLM 150 ADM and the DSX.
• Test subscriber input signal parameters.
• Replace the suspect MC1A unit if the PM
register count stops incrementing when the
standby unit is on line.
• Verify the proper threshold levels through
local standards. Refer to TL1 Commands
practice FJTU-320-515-274, Section 5,
Performance Monitoring Parameters, for the
minimum, maximum, and default
parameters.
Vol. ll, Page 480.3-41