Voice Over Internet Protocol Gateway

What Does Voice Over Internet Protocol Gateway Mean?

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. VoIPs use VoIP gateways for switched and network interfacing.


Techopedia Explains Voice Over Internet Protocol 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 home phone services and solutions that are also used for businesses that apply proprietary protocols and Extensible Messaging and Presence Protocol (XMPP). VoIP applications also may offer Asterisk’s open-source Inter-Asterisk Exchange Protocol (IAX).


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Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…