Managing System Alarms 177
SIM Alarms
Table 30 describes the alarms specific to QSIMs and FAMs
Voice Compression Module Alarms
Table 29 describes the major alarms specific to the Voice Compression module.
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Transmit FIFO
Overflow
The cell bus is congested, and
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.
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.
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.
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.
Table 30 QSIM Alarms
Alarm Meaning Troubleshooting Steps
LMI Link Down The Local Management
Interface has taken the link
down.
Check the LMI protocol configuration
for the port.
Table 31 Voice Compression Module Alarms
Alarm Meaning Troubleshooting Steps
E1 Loss of CAS
Multiframe
E1 signaling multiframe
alignment has been lost.
Check the physical connection and the
carrier for configuration problems.
E1 Time Channel 16
AIS Rcv
All 1s in E1 time slot 16 for 2
consecutive frames.
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.
Far End E1 Loss of
CAS
The far end device has lost
Channel Associated signaling.
Check the E1 configuration of the far
end device.
Channel PCM
Loopback
Condition
A loopback is configured on
the channel. Loopbacks are for
troubleshooting only and
should not be present during
normal operating conditions.
If you are not troubleshooting the
channel, turn off the loopback.
Table 29 DSX-1/E1 CBR Module Alarms (continued)
