With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gsmBcLayer1IntermediateRate
gsm Bc Layer1 Intermediate Rate
This attribute indicates the intermediate rate used in the physical layer rate adaptation process. This field is valid between the mobile and the IWF. For user data rates of 300 bit/s - 4800 bit/s the intermediate rate is 8 kbit/s. For user data rates 9600 bit/s and above the intermediate rate is 16 kbit/s.
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IPHost Network monitor allows you to monitor gsmBcLayer1IntermediateRate 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 modems right now.