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- Duration: 1:32
- Published: 19 May 2010
- Uploaded: 25 Aug 2010
- Author: cemblore
An ATA usually takes the form of a small box with a power adapter, one Ethernet port, one or more FXS telephone ports and may also have a FXO link. 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.
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, MGCP, SCCP or IAX, and encodes and decodes the voice signal using a voice codec such as G.711, G.729, GSM, iLBC or others. Since the ATA communicates directly with the VoIP server, it does not require a personal computer or any software such as a softphone. It uses approximately 3 to 5 watts of electricity, depending on model and brand.
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