With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
appnHeapSpaceLimit
appn Heap Space Limit
This attribute represents the size of the heap in bytes, as obtained by storage management from the underlying operating system.
Back to Nortel-Magellan-Passport-AppnMIB MIB page.
IPHost Network monitor allows you to monitor appnHeapSpaceLimit 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.