B3Err; Bersdl And Bersfl - Fujitsu FLM 150 ADM Maintenance And Trouble Clearing

Maintenance and Trouble Clearing
FJTU-320-515-480
3.10

B3ERR

Table 3-8: B3ERR (B3 Error Data Generated)—Standing Condition
AID
Direction
Type
STS1 TRMT/RCV
3.11

BERSDL and BERSFL

Table 3-9: BERSDL and BERSFL (Bit Error Rate Signal Degrade/Fail-Line)—Alarm Event
AID
Direction
Type
OC3 TRMT/RCV
OVTG
TRMT
150 ADM
OC-3/
OC-12
ADDED
SIGNAL
T1 TRMT
Issue 9, May 1999
Probable Cause
CONN-TSTSIG-STS1
has been executed.
Probable Cause
• The OC-3 receive power has
fallen below or exceeded the
specified limits. May be
accompanied by an OC-3 LOS
alarm.
• A fiber problem.
• A connector in the OC-3 optical
link is dirty.
• The far-end transmitter is
creating bit errors.
• Points of large optical reflection
exist along the OC-3 link.
The incoming OVTG signal has
fallen below or exceeded the specified
limits. May be accompanied by an
OVTG LOS alarm.
• The DS1 input has exceeded its
provisioned BER threshold.
• A DS1 far-end NE (such as a
channel bank) failure.
• A DS1 cable failure.
FNC and FNC Customer Use Only
Suggested Corrective Action
• Verify that the facility testing is complete.
• Execute the DISC-TSTSIG-STS1 command.
Suggested Corrective Action
• Verify the local receive and upstream
transmit levels. Clean the optical
connectors.
• Verify good optical connections to the
local and far-end OC-3 units and at the
Lightwave Distribution Frame (LDF)
panels along the link (see Section 5.1,
Handling Fiber Cables, and Section 5.2,
Cleaning, Connecting, and
Disconnecting the Optical Connectors.)
• Replace the far-end OC-3 channel unit.
Refer to Section 4.12, Replacing the
OC-3 Optical Channel (HC1A and
MC6A) Units, and Section 4.16,
Replacing the Low-Speed Channel–
OVTG (LC1A-F6xx) Unit.
• Check the remote FLM 6 for OVTG unit
removal or failure.
• Verify the local receive optical levels,
and the upstream transmit levels.
Clean the optical connectors.
• Check the fiber link and perform
trouble analysis procedures as
necessary.
• Verify the cable connections at both
sites.
• Perform DS1 source trouble analysis.
• Replace the DS1 cable.
3.10: B3ERR
Vol. ll, Page 480.3-10