What Is Voip Gateway And What Is Voip Gateway Used For

Many people have questions like what is Voip Gateway and what is voip gateway used for，next i will explain the basic features of the voip gateway to help you understand.

Voip gateway definition

Voice over Internet Protocol (VoIP) gateway is a device that converts analog telephony signals to digital. After converting the signal, the VoIP gateway organizes it into data packets and encrypts it for transmission. VoIP vendors use VoIP gateways for switched and network interfacing.

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What the basic features of the voip gateway？

VoIP gateways include the following features:

Call routing, packetization and control signaling management

Voice and fax compression/decompression

External controller interfaces, for example to a softswitch, billing system or network management system

VoIP endpoints must share a communication protocol and at least one audio codec, such as Session Initiation Protocol (SIP), which is standardized by the Internet Engineering Task Force (IETF).

Skype and Google Talk are VoIP applications applying proprietary protocols and Extensible Messaging and Presence Protocol (XMPP). VoIP applications also may offer Asterisk’s open-source Inter-Asterisk Exchange Protocol (IAX).

what is voip gateway used for？

A voice gateway is one of the most important components within a voice over IP infrastructure. The voice gateway is used to connect the enterprise VoIP network with the telecommunications provider, using a number of different connectivity methods, such as PSTN, ISDN and SIP.

In many cases, voice gateways are also used as "interfacing devices" between old analog devices and the VoIP infrastructure. Some examples include fax machines, security alarm systems and analog phones. These devices normally require a PSTN line to work. In these cases, the voice gateway can simulate a PSTN line connecting the analog device to the VoIP network via an FXS port as shown in the diagram below.

Voice gateways support a variety of protocols, allowing easy integration with any type of VoIP infrastructure. SIP voice gateways are very popular and usually compatible with all VoIP telephony vendors since SIP is the preferred protocol for VoIP communications.