With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vncsVpNewVoiceRatesTable
vncs Vp New Voice Rates Table
1.3.6.1.4.1.562.2.4.1.44.3.381
This attribute specifies the minimum and maximum voice rate parameters used during negotiation with the remote end across the subnet. For g711G726 encoding, rates can change during voice traffic due to congestion in the network. Therefore, you can have differing minimum and maximum rates for g711G726 encoding. All other encodings have a fixed rate for the duration of voice traffic and so their minimum and maximum rates can not be modified. The negotiated minimum and maximum voice rates are available in Vsr Svs Framer negotiatedRates.
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