With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
lpEngFrsCallsRefused
lp Eng Frs Calls Refused
This attribute counts the total number of call connections (including calls from the link as well as calls from the subnet) that have been refused because currentCalls has reached the limits, as specified by the engineering formulas for Frs on this LP.
Back to Nortel-Magellan-Passport-FrameRelayEngMIB MIB page.
IPHost Network monitor allows you to monitor lpEngFrsCallsRefused 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.