A:Answer Hi - The telephone port of the VTech CS6629 will only fit an RJ11 line cord. The unit is compatible with a VOIP, Cable or analog residential type of service. For more details, you can contact our Customer Support at 1-800-595-9511. We are open from 9:00 AM to 3:00 PM, Mondays through Fridays.
Thank you,
-VTech Support