With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
sigChanICmapStorageType
sig Chan I Cmap Storage Type
1.3.6.1.4.1.562.2.4.1.115.18.1.1.4
This variable represents the storage type value for the sigChanICmap tables.
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IPHost Network monitor allows you to monitor sigChanICmapStorageType 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.