With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gsmBcV42bisLastDecodeError
gsm Bc V42bis Last Decode Error
This attribute indicates last error found by the decoder. Error values are: none, No errors found. badStepup, Receipt of STEPUP (step up codeword size) codeword when it would cause C2 (current code word size) to exceed N1 (maximum code word size). codewordEqC1, Receipt of a codeword, at any time, equal to C1 (next empty dictionary entry). emptyCodeword, Receipt of a codeword representing an empty dictionary entry. reservedCommand, Receipt of a reserved command code. generalError, Receipt of any other error. The action taken by V.42bis on detecting an error is provisioned by component GsmIwfV42bis attribute actionOnError.
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IPHost Network monitor allows you to monitor gsmBcV42bisLastDecodeError on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel switches right now.