Altigen MAXCS ACC 6.0 Administration Manual page 137

Error Message
L1 failure: <Red
Alarm>
[PRI only]
L2 Failure: <No Sync
Flag>
[PRI only]
L2 Failure: <Not
established>
Reading the Statistics
The Statistics panel displays the number of errors that have occurred since the last
system reboot or statistics clearing. There may be non-zero values when configuring the
T1 span for the first time. You can clear these fields with the Clear button.
Error
Frame Errors
OOF Errors
Rec Frame Slips
Line Code Errors
Bit Errors
Xmt Frame Slips
Clear button
Meaning
Layer 1 failure, physical
layer; Bi-Polar Violations
(BPV), Line Code
Violations (LCV), or Out
Of Frame detected
Layer 2 failure, data link
layer; no sync flag has
been detected in data
link layer
Layer 2 failure, data link
layer; the peer-to-peer
link has not established
in data link layer
Meaning
Number of framing bit errors. In T1 mode, a framing bit
error is defined as an incorrect FS-bit value. The counter is
suppressed when framer loses frame alignment
The Out Of Frame counter registers every time the T1 chip
is forced to re-frame when receiving a frame with severe
errors.
The Receiver Frame Slips counter shows the number of
frame slips for the receiver.
Line Code Error is defined as an occurrence of a bi-polar
variation or excessive zeroes.
Bit Errors are defined as a CRC-6 error in ESF, FT-bit
error in SLC-96 and F-bit or sync bit error in SF.
Transmit Frame Slips counter shows the number of
frame slips for the transmitter
Use the Clear button to reset the statistics counters.
MAXCS ACC 6.0 Administration Manual 123
Chapter 11: Board Configuration
Action
Location condition,
equipment problem.
- For excessive BPV/
LCV, check AMI/B8ZS
setting.
- For OOF, check the
MVIP bus master
setting.
OR
Have CO perform a line
test to check for a faulty
cable or line.
Check if D-channel is
active or not
CO must activate HDLC
link