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Communication Manager Maintenance-Object Repair Procedures
2216 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
CRC Error Counter Test (#623)
This test is nondestructive.
This test reads the BRI port’s CRC error counters that are maintained on the BRI circuit pack.
The Cyclic Redundancy Check (CRC) is a means of error detection used to determine the
integrity of data frame contents. The CRC error counter is incremented by the circuit pack when
it detects a CRC error. The test passes if the value of the counter is 0 (that is, the error is
cleared). If the counter is non-zero, the test fails, and the value of the counter is displayed in the
Error Code field.
Receive FIFO Overflow Error
Counter Test (#625)
This test is nondestructive.
This test reads and clears the BRI port’s Receive FIFO Overflow error counter maintained on
the TBRI-BD circuit pack. This counter is incremented by the circuit pack when it detects an
overflow of its receive buffers. The test passes if the value of the counter is 0 (that is, the error is
cleared). If the counter is non-zero, the test fails, and the value of the counter is displayed in the
Error Code field. This error can occur either if:
● Signaling frames are being received from the Packet bus at a rate sufficient to overflow the
receive buffers on the circuit pack for a port
● A hardware fault is causing the receive buffers not to be emptied properly by the circuit
pack.
This test is useful for verifying the repair of the problem.
Table 791: Test #623 CRC Error Counter Test
Error
Code
Test
Result
Description / Recommendation
ANY FAIL This error occurs when a frame with a bad CRC is received over the
D channel by the BRI board. This error is reported on a per-port basis when
the counter goes over the threshold. This error is most likely due to a
problem with the wiring or interference on the wiring caused by a noise
source or no termination. It usually does not indicate a problem with the
circuit pack.
PASS The CRC error counter was read correctly and has a value of 0.