User guide

Chapter 5: Board Configuration
AltiWare ACC 5.1 Administration Manual 83
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: <Remote
Alarm Indication
(RAI)>
Layer 1 failure, CO
notifies that the
configuration is wrong;
RAI = Remote Alarm
Indicator
Correct the settings.
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.
Error Message Meaning Action