With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrMmVrMaxHeapSpace
Virtual Router Mm Virtual Router Max Heap Space
1.3.6.1.4.1.562.2.4.1.100.2.10.1.1
The maximum percentage of the total system heap space that is allowed for use by this Virtual Router. Memory allocation for this VR which attempts to exceed this limit will fail causing a shut down of the requesting process.
Back to Nortel-Magellan-Passport-VirtualRouterMIB MIB page.
IPHost Network monitor allows you to monitor vrMmVrMaxHeapSpace 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 speech servers right now.