source: http://www.securityfocus.com/bid/4507/info

Nortel CVX 1800 Multi-Service Access Switch is a hardware modem bank.

The device contains a default SNMP community string of "public", which may allow enable a remote attacker to gain access to sensitive information such as authentication credentials for local accounts on the device, network infrastructure info, etc. 

The following example was provided:

snmpwalk CVX-IP-ADD-RESS public .1