With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceRcvrX25DnaPacketSizeNegotiation
trace Receiver X25 Dna Packet Size Negotiation
1.3.6.1.4.1.562.2.4.1.106.2.2.2.13.1.9
This attribute, if set to local specifies that packet sizes can be negotiated locally at the interface irrespective of the setting at the remote interface. If set to endtoEnd, then the packet size negotiation is between the local and remote interface (i.e. packet sizes are the same on both interfaces).
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceRcvrX25DnaPacketSizeNegotiation 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.