With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
timeServerPoll
time Server Poll
1.3.6.1.4.1.3646.1300.2.1.2.1.3.13.1.3
This attribute indicates the time interval for the Passport module to poll the network time server for time synchronization.
Back to Nortel-Magellan-Passport-TimeMIB MIB page.
IPHost Network monitor allows you to monitor timeServerPoll 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 secure routers right now.