analog telephone adapter
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analog telephone adapterA device that connects regular telephones to a broadband cable or DSL network for voice over IP (VoIP) service. Plugging into the cable or DSL modem, the analog telephone adapter (ATA) delivers dial-tone, manages the call setup and provides the conversion between voice signals from an analog telephone and IP packets, and vice versa.
Combo Modem and Adapter (E-MTA)
If the telephone adapter and cable modem reside in one device, the combination unit is officially an "embedded multimedia terminal adapter" (see VoIP modem). See VoIP, softphone and analog telephone.