Linksys WRT54GP2 Setup Manual page 5

Step 13.
Phone port one on the router, should now display a light, located at
the front of the device.
Pick up the handset of your telephone and listen for a strong flat tone
(this is the engin dial tone, it is a little different to what you are used
to)
If the phone port light is not present or there is no dial tone, please
contact engin on 1300 305 000 as the device may require a
configuration file to be regenerated.
Alternatively go to our live chat service:
http://www.engin.com.au/help/LiveChat.aspx
To better assist you, please have ready:
1. Your engin account number or engin phone number
2. The IP address of your engin voice box
3. The make and model of your modem and router
Phone port lights