Won't support triple play "voice" service
This modem is for HSI only and will not support digital voice service. It will not replace what you rent today unfortunately and I know that from experience. You need a 'telephony modem' that handles both type services. http://forums.comcast.com/t5/Voice-Service-and-Equipment/voice-adaptor-for-motorola-SB6121/td-p/1131207
I just recently upgraded to Comcast Triple play (tv, internet, phone) and I'm paying $7.95 monthly rental fee for the modem. Is there a better option? Cheaper option? Please let me know. Want to buy this tomorrow either on Amazon or some other site if the price is right.
For Comcast the approved list for cable and telephony modems is here http://mydeviceinfo.comcast.net/. There are telephony models by Motorola and Zoom not on the list and I would check with a technician before investing outside the approved list.
Last edited by mreddieob; 09-14-2012 at 05:25 AM..