I use ooma phone service with my exede modem. I plugged the
cable into one of the 4 jacks on the back of the modem. Should I have used the
jack labeled phone. Will it work with a non exede phone system?
You can only use the phone jack on the WiFi modem to plug your phones into if you have subscribed to the Exede Voice Phone service. Using any other third party VOIP device, you are correctly plugging into on of the Ethernet jacks on the modem.