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Control Computer Messages
Report Alarm 8951
*
<YY-MM-DD> <hh:mm:ss> NODE=<xxx...x>
8951<B> MODADDR=<addr> MODTYPE=<e3a>
REPORT ALARM: hsmaint: Daily threshold for Near End Background Block Error
exceeded
Background block error count <num>
CLASS=23 TASKID=<num>
Message Explanation
The 24-hour threshold configured for the near-end background block error has been exceeded for
the indicated Trunk-E3A module.
An errored block is the occurrence of a received BIP-8 (Bit-Interleaved Parity-8) code that does
not match the corresponding locally calculated code. A background block error is an errored
block not occurring as part of severely errored seconds (SES).
This problem is typically caused by bit errors on the facility. If only one end (near or far) has
errors, the problem is on either the receive or transmit side of the cables.
Recommended Action
Enter verify trunk < addr > and check that the TRANSMIT REFERENCE CLOCK is set
correctly for the indicated module.
Verify that all cables are correctly and securely connected.
Run the complete set of loopback diagnostics to isolate the problems to a particular segment
of the facility.
Replace hardware as necessary.
The Commands, Cabling, Troubleshooting, and Installation chapters of the M2 Trunk Module
Reference provide information for these procedures.
Data Networking Products Messages Reference, Issue 5
2-479