With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gsmBcCallType
gsm Bc Call Type
This attribute indicates the current call type. Valid values are: faxG3, group 3 fax calls cda31khz, asynchronous 3.1kHz modem cdaUdi, asynchronous unrestricted digital data call cdsUdi, synchronous unrestricted digital data call cds31khz, synchronous 3.1kHz modem
Back to Nortel-Magellan-Passport-GsmIwfMIB MIB page.
IPHost Network monitor allows you to monitor gsmBcCallType 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 multiplexers right now.