With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
trkPaAtmMode
trk Pa Atm Mode
This attribute specifies the operating mode of the PathAdmin. When set to multiplexing the PathAdmin to multiplex voice calls to the given atmConnection using single cell per voice packet transport. All other calls will be multiplexed using AAL5 over the Trunk's VCC. When set to mapping the PathAdmin will allocate a VCC per LCh/n. In mapping mode the atmConnection should not be set. The VCC chosen for a given connection can be seen in the LCh localConnection attribute.
Back to Nortel-Magellan-Passport-PorsAtmTrunksMIB MIB page.
IPHost Network monitor allows you to monitor trkPaAtmMode 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.