With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnRtpTxBytes
appn Rtp Tx Bytes
This attribute is the total number of bytes sent on this High Performance Routing-Rapid Transport Protocol pipe. This counter wraps to zero.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnRtpTxBytes 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.