With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
frUniDlciDiscardedBytes
Frame Relay Uni Dlci Discarded Bytes
This attribute counts the total bytes in invalid frames received from the interface and discarded at the DLCI since the start of the interval period. This count is a sum of octets in frames discarded due to the number of octets in the information field greater than the subscribed maximum or equal to 0, due to aBit turned off, or due to rate enforcement. The start of the interval period is captured in the startTime attribute. The count is reset to zero when an accounting record is generated.
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IPHost Network monitor allows you to monitor frUniDlciDiscardedBytes 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 speech servers right now.