With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
traceRcvrX25DnaDefaultSendToNetworkWindowSize
trace Receiver X25 Dna Default Send To Network Window Size
1.3.6.1.4.1.562.2.4.1.106.2.2.2.13.1.8
This attribute specifies the default value for the number of data packets that can be received from the interface before any acknowledgment.
Back to Nortel-Magellan-Passport-X25TraceRcvrMIB MIB page.
IPHost Network monitor allows you to monitor traceRcvrX25DnaDefaultSendToNetworkWindowSize 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.