I found this on an document that may help

General
The supervisor password can be reset to 0000 (default) as follows:
1. Call the CNF ETU.
2. When prompted for supervisor password, dial *19*# (no prompts are heard at this time).
3. Press the Reset Switch SW1 to reboot the CNF(8)-U13 ETU.


Regards,

Paul W
Now back to a 0 day week. Love these 7 day weekends.