Review on Arris TM602G Telephony Modem [Bulk Packaging]: Boost Your Network with Docsis Technology by Ryan Sandell

This TM602G works great with Comcast/Xfinity Voice service. I bought it to replace the TM602G provided by Comcast. After 3 days of fighting with them (they claimed it wasn't a supported modem even though I already had the exact model I rented from them activated on my account) I finally activated it. The trick with layer 3 support was to add it as TM722G. To save yourself some headaches, enable it with the following steps: 1. Plug it in and run it. Wait for the updated device firmware to download if needed. 2. Call 1-800-Comcast and tell the representative you have a modem that you want voice-enabled only.3. When asked for the model number, say you have a TM722G. Wait for them to complete activation.4. After activation, check the operation of the modem. Good luck and I hope this helps save some people a headache!