ATA Box for Analog Phones

The most common ATA ( analogue terminal adapter ) is a device with at least one telephone jack (FXS port) used to connect a conventional telephone and an ethernet jack used to connect the adapter to the LAN. Using such an ATA it is possible to connect a conventional telephone to a remote VoIP server. The ATA communicates with the remote VoIP server using a VoIP protocol such as H.323, SIP, MGCP or IAX and encodes and decodes the voice signal using a voice codec such as ulaw, alaw, gsm, ILBC and others. Since ATAs communicate directly with a VoIP server, they do not require any software to be run on a personal computer, such as a softphone.

Analog Telephone Adapters (or ATAs) are one of the recent developments in VoIP technology. These adapters allow you to use your existing analog telephones to place calls over the Internet using VoIP. Because of these adapters, using VoIP is not much different today than using a regular telephone service. They allow your VoIP service to “act like” a traditional phone – you hear a dial tone when you pick up the phone and dial the number.

An ATA, like many of the devices in today’s digital world, is actually a small, highly dedicated computer. It performs several functions that are required for VoIP communications. One function is that of providing an analog interface for the telephone. This includes providing a dial tone to your analog telephone, as well as a ring signal for incoming calls. Another function it provides is that of converting the analog voice signal into a digital form that can be carried over the internet. Similarly, it must also convert the incoming digital signal into an analog one that your telephone can understand. The final function is that of handling the VoIP connection to the Internet. This includes the connection to your VoIP service provider as well as the routing of digital voice packets – the “protocol” portion of VoIP.

The best part of this is that this ATA box is easy to carry anywhere in the world, just connect this box to internet on one part and with phone on other part and just start dialing your destinations.

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