go to the outside telephone box on the house and make sure the phone company lines are disconnected. If it's a plug, then unplug it. The vonage box has a plug for two phone devices. Plug a cord between it and a wall jack. Check the other phones. Dial the number from another phone, such as your cellphone. See if there are problems. If so, turn off the ringers on all phones except the one connected to the vonage box and one connected to a wall plug, see if it works then. If so, then you can turn on the next most needed ringer and try again. The ringers use up electrical power so too many phones on a line ringing can interfere with the service.
I just subscribed to Vonage services, received the equipment and have completed the installation. The phone in the room with the Vonage device works fine and does everything it was touted to do. I have telephones in other rooms of the home, none of which work under the current configuration.
Vonage Service Center advises they have no service personnel in this area to do the installation routine for the other phones in the home (which they say requires a professional installer) and that I should call the Geek Squad for the service and Vonage would give me a $75 service credit.
I called the Geek Squad and they told me none of them know how to perform this service as they have never been trained on it nor have they been asked to do this kind of installation before.
Does anyone have any ideas of how to connect the other phones in the home to the VoIP system?