With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
cRNpiCallsFailed
Call R Npi Calls Failed
This attribute contains the total number of call setup packets that failed to route. This could be caused by the MID or RID being unreachable or by the DNA failing to translate to a MID or RID. Check the prefix-DNA provisioning data and the DNAs associated to the endpoints of the connection. When the counter reaches the maximum, it wraps back to zero.
Back to Nortel-Magellan-Passport-CallServerMIB MIB page.
IPHost Network monitor allows you to monitor cRNpiCallsFailed 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.