With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vrIpTcpMaxConn
Virtual Router Ip Tcp Max Connection
Limit on number of connections the TCP can support. The value is always -1 which indicates that the number of connections supported is dynamic (limited by memory in the system).
Back to Nortel-Magellan-Passport-IpMIB MIB page.
IPHost Network monitor allows you to monitor vrIpTcpMaxConn 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.