Altigen ACM 6.7 Administrator's Manual page 161

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
Note:
For ideally synchronized systems, Transmit and Receive Frame Slips counters
should be '0.' Continuous update of the frame slips counters means that transmit
and receive frequencies are not equal. In this case, you should check the system
and CT-Bus clock setup.
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 ACM 6.7 Administration Manual 147
Configuring the Triton T1/E1 Board
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