rootâ² canal` ther`apy. n. 1. the branch of endodontics that treats disease of the dental pulp. 2. a treatment for such disease in which the pulp is removed and replaced by filling material.
A textphone is a device that enables phone calls to be made using text. Textphone software can be used on a computer to enable it to be used as a textphone.
VoIP modem. A device that combines a DOCSIS cable modem and analog telephone adapter. Officially called an embedded-multimedia terminal adapter (E-MTA), the modem provides the data interface to the cable company, and the telephone adapter provides the voice over IP (VoIP) interface for one or more analog telephones.