With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gsmBcRlpRemoteBusyIndications
gsm Bc Rlp Remote Busy Indications
This attribute counts the number of times the mobile Radio Link Protocol (RLP) entity is busy (that is, it is in Asynchronous Balanced Mode (ABM) and is not ready to receive Information frames). The RLP entity is considered to be not ready to receive information frames if the mobile sends a flow control indication RNR (Receive Not Ready). A Receive Ready is sent to the RLP entity when the mobile is ready to receive data. The counter wraps when it exceeds the maximum value.
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IPHost Network monitor allows you to monitor gsmBcRlpRemoteBusyIndications 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.