These messages are displayed with the corresponding card and
port number.
The following two messages indicate when the E1/T1 line goes
UP or DOWN. Any other events due to be logged, will be logged at
this time.
Card %d port %d status:
Cable or local modem fault
-
This message is logged when the frame synchronization
is lost.
-
If the "qdown" option in the port
configuration is set, then the line DOWN status will be reported
as soon as the hardware detects the loss of frame sync.
-
If the "qdown" option is not in
use, the line DOWN status will only be reported after frame sync
has been seen to be lost for 4 consecutive 1 second intervals.
Card %d port %d status:
No error detected
-
This message is logged when the frame synchronization
is established on an E1/T1 line which was previously marked as DOWN.
The following messages indicate specific events occurring
on the E1/T1 lines.
Slip Positive
-
The frequency of the receive route clock is less
than expected. An E1 or T1 frame will be repeated.
Slip Negative
-
The frequency of the receive route clock is greater
than expected. A frame will be skipped.
Auxiliary Pattern Indication
-
The auxiliary pattern is detected in the received bitstream.
Line Loop Back Status
Change
- For E1:
A change in the remote alarm bit in CAS multiframe alignment
word is detected.
- For T1:
The LLB actuate signal or the LLB deactuate signal,
is detected over a period of 33.16 msec with a bit error rate less
than 1/100.
Alarm Indication Signal
TS 16 Status Change
-
The alarm indication signal AIS in time slot 16
for the 64 kbit/s channel associated signaling is detected or cleared.
Transmit Slip Indication
- For E1:
Multiframe alignment of timeslot16 has been lost
if two consecutive multiframe patterns are not detected or if in
16 consecutive timeslot16 all bits are reset.
- For T1:
There is an error in the clock system. If the wander
of the transmit route clock, which normally is phase locked to a
common submultiple of the system clock, is too great, data transmission
errors will occur.
Remote Alarm
- For E1:
A remote alarm in TS0 is detected.
- For T1:
A remote alarm (yellow alarm) is detected.
Remote Alarm Recovery
-
The remote alarm is cleared.
Loss of Signal
-
Occurs when a "loss of signal" alarm
is detected in the received bitstream.
Alarm Indication Signal
-
Occurs when an "alarm indication" signal
is detected.
Loss of Multiframe
Alignment
- For E1:
Only active if multiframing is enabled. The framer
has found the doubleframing (basic framing) and is searching for
the multiframing, and no multiframing could be found within a time
window of 400 msec after basic framing had been found.
- For T1:
The framer has lost the multiframe alignment in
F12 or F72 format.
Multiframe Alignment
Recovery
- For E1:
The framer has found two CRC-multiframes at the correct
interval, without a framing error. Only active if CRC-multiframe
format is selected.
- For T1:
The framer has reached multiframe alignment in F12 or
F72 format.
Loss of Frame Alignment
-
The framer has lost synchronization.
Frame Alignment Recovery
-
The framer has reached synchronization.
Receive CRC6 Error
- For E1:
The CRC4 check of the last received submultiframe failed.
- For T1:
The CRC6 check of the last received multiframe failed.
Printable version
