With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
gvcIfCallsRefusedByInterface
General Vc Interface Calls Refused By Interface
This attribute counts the number of incoming Qllc and Frame-Relay calls refused by the interface. When the maximum count is exceeded the count wraps to zero.
Back to Nortel-Magellan-Passport-GeneralVcInterfaceMIB MIB page.
IPHost Network monitor allows you to monitor gvcIfCallsRefusedByInterface 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.