Sim Alarms; Voice Compression Module Alarms - 3Com SuperStack II PathBuilder S330 Reference Manual

Table 29 DSX-1/E1 CBR Module Alarms (continued)
Transmit FIFO The cell bus is congested, and
Overflow cells are backed up on the CBR.
Traffic at the output side of the
CBR port is being transmitted
more slowly than it is being
received from the cell bus. As a
result, the output buffer is
overflowing. In general, the
problem is that the CBR
connection is not synchronized
end-to-end. The clock rate of
the output port does not
match the clock rate of the
device from which the traffic
originated.
VC RDI Receive VC RDI (Remote Defect
Indication) OAM received in
the connection. The far end
equipment has a problem with
the signal it is receiving,
indicating that the problem lies
between the network provider
and the far end terminal
equipment for this connection.

SIM Alarms

Table 30 describes the alarms specific to QSIMs and FAMs
Table 30 QSIM Alarms
Alarm Meaning
LMI Link Down The Local Management
Interface has taken the link
down.

Voice Compression Module Alarms

Table 29 describes the major alarms specific to the Voice Compression module.
.
Table 31 Voice Compression Module Alarms
Alarm Meaning
E1 Loss of CAS E1 signaling multiframe
Multiframe alignment has been lost.
E1 Time Channel 16 All 1s in E1 time slot 16 for 2
AIS Rcv consecutive frames.
Far End E1 Loss of The far end device has lost
CAS Channel Associated signaling.
Channel PCM A loopback is configured on
Loopback the channel. Loopbacks are for
Condition troubleshooting only and
should not be present during
normal operating conditions.
Managing System Alarms
The entire CBR connection must be
synchronous end-to-end. Make sure
the clock rates of the devices at either
end of the connection match each
other and match the transmit clock rate
of the CBR ports on the PathBuilder
device.
Check for a defective cable between
the far end interface port and your
service provider's network interface
unit. An open transmit line can cause
this condition.
Troubleshooting Steps
Check the LMI protocol configuration
for the port.
Troubleshooting Steps
Check the physical connection and the
carrier for configuration problems.
Make sure both the local device and
the far end device are configured for
Time Slot 16 framing. If both devices
are correctly configured, there may be
a hardware problem in either device.
Check the E1 configuration of the far
end device.
If you are not troubleshooting the
channel, turn off the loopback.
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