Altigen AltiContact Manager Version 5.0A, Administration Manual

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Configuring the Triton T1/E1/PRI Board
6-22 AltiContact Manager Administration Manual
Reading the Statistics
The Statistics is an informational display of accumulated statistics
(counters) for the 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.
• 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.
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 MVIP clock setup.
L2 Failure: <No
Sync Flag>
Layer 2 failure, data
link layer; no sync flag
has not been detected in
data link layer Check if D-channel is
active or not
L2 Failure:
<Not estab-
lished>
Layer 2 failure, data
link layer; the peer-to-
peer link has not estab-
lished in data link layer Check if the data link
has come up or not
Table 1: Span Status Error Messages
Error Message Meaning Action