ATA (Analog Telephony Adapter) - Definition
An analog telephony adapter (ATA) is a device used to connect one or more standard analog telephones to a digital and/or non-standard telephone system such as a Voice over IP based network.
An ATA usually takes the form of a small box with a power adapter, one Ethernet port, and one or more FXS telephone ports. Users can plug one or more standard analog telephone devices into the ATA and the analog device(s) will operate, usually transparently, on a VoIP network.
ATAs are used by many VoIP companies selling a telco-alternative VoIP service, where the device is used to replace a user's connection to a traditional telephone company. The most common ATA is a box with at least one Foreign Exchange Station (which includes a telephone jack), used to connect a conventional telephone, and an Ethernet jack used to connect the adapter to a LAN. Using such an ATA, it is possible to connect a conventional telephone to a remote VoIP server. The ATA communicates with the server using a protocol such as H.323, SIP, and MGCP, and encodes and decodes the voice signal using a voice codec such as G.711, G.729, GSM, iLBC or others.
ATA (Analog Telephony Adapter) - Synonyms
ATA; Analog Telephony Adaptor; Residential Gateway; VoIP Router