With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
nSStandbyReference
n S Standby Reference
Indicates the standby 8Khz clock reference source which will be selected if a failure is detected on the active source.
Back to Nortel-Magellan-Passport-TimeMIB MIB page.
IPHost Network monitor allows you to monitor nSStandbyReference 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 switches right now.