With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
acUseridCustomerIdentifier
ac Userid Customer Identifier
This attribute indicates the Customer Identifier (CID) assigned to the userid. The CID is used in Customer Network Management (CNM). A CNM operator may only send commands to components provisioned with the same CID as the operator. A CNM operator will only receive event data, such as alarms, which is generated by components provisioned with the same CID as the operator. The special CID of 0 is reserved for the network owner, known as the Netman. The Passport CID attribute is compatible with DPN-100 Netman and Basic CIDs.
Back to Nortel-Magellan-Passport-MgmtInterfacesMIB MIB page.
IPHost Network monitor allows you to monitor acUseridCustomerIdentifier 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.