Hey Carl,

The WAN port may not have been opened within your ATA.

You can access the interface from the LAN side of the ATA by going to:

http://192.168.15.1/

(note must be connected to 1 of the 3 ethernet ports of the ATA)

un/pw = admin / voipoadmin or admin / admin

Under the administration tab you can update the password and open the port for remote management.

Cheers,
James