With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
timeOffset
time Offset
1.3.6.1.4.1.3646.1300.2.1.2.1.10.1.6
This attribute specifies the number of minutes to be added to the reference time, which is Universal Coordinated Time (UTC), to obtain the moduleTime. It keeps its value even if the card boots. However, if the node is powered-off for more than 24 hours, it resets to the default value, which is 0. The specified value should be in the range -720 (-12 hours) to 720 (+12 hours). Values greater than 720 are accepted for backward compatibility; for example, 780 (13 hours) corresponds to an offset of -11 hours. If a value greater than 720 is entered, it will be displayed as a negative offset.
Back to Nortel-Magellan-Passport-TimeMIB MIB page.
IPHost Network monitor allows you to monitor timeOffset 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 modems right now.