Altigen ACC 6.7, Administration Manual

Page: 137 / 462

Chapter 11: Board Configuration
MAXCS ACC 6.7 Administration Manual 123
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.
L1 failure: <No Sync
Frames Layer 1 failure, physical
layer; no valid framing is
detected. Possible span mis-configuration
(ESF is selected but the actual
framing is SF, or vice versa).
Check span configuration.
L1 failure: <Red
Alarm> Layer 1 failure, physical
layer; Bi-Polar Violations
(BPV), Line Code Violations
(LCV), or Out Of Frame
detected 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.
[PRI only]
L2 Failure: <No Sync
Flag> Layer 2 failure, data link
layer; no sync flag has
been detected in data link
layer Check if D-channel is active or
not
[PRI only]
L2 Failure: <Not
established> Layer 2 failure, data link
layer; the peer-to-peer link
has not established in data
link layer CO must activate HDLC link
Error Meaning
Frame Errors 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
OOF Errors The Out Of Frame counter registers every time the T1 chip
is forced to re-frame when receiving a frame with severe
errors.
Rec Frame Slips The Receiver Frame Slips counter shows the number of
frame slips for the receiver.
Line Code Errors Line Code Error is defined as an occurrence of a bi-polar
variation or excessive zeroes.
Bit Errors 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.
Xmt Frame Slips Transmit Frame Slips counter shows the number of
frame slips for the transmitter
Clear button Use the Clear button to reset the statistics counters.
Error Message Meaning Action