Media Gateway - Definition
A Media Gateway acts as a translation unit between disparate telecommunications networks such as PSTN; Next Generation Networks; 2G, 2.5G and 3G radio access networks or PBX. Media Gateways enable multimedia communications across Next Generation Networks over multiple transport protocols such as ATM and IP. VoIP Media Gateways perform the conversion between TDM voice, to Voice over Internet Protocol (VoIP).
As the Media Gateway connects different types of networks, one of its main functions is to convert between the different transmission and coding techniques. Media streaming functions such as echo cancellation, DTMF, and tone sender are also located in the Media Gateways.
Media Gateways are controlled by a Media Gateway Controller which provides the call control and signaling functionality. Communication between Media Gateways and Call Agents is achieved by means of protocols such as MGCP, MEGACO/H.248 or SIP.
Media Gateway - Synonyms
VoIP Gateway; Voice Gateway; VoIP Media Gateway; PSTN Gateway, MGW; Voice IP Gateway; VoIP SIP Gateway; SIP VoIP Gateway; VoIP Telephone Gateway; VoIP Telephony Gateway; VoIP to PSTN Gateway; Access Gateway VoIP; Gateway Voice over IP; VoIP Gateways; Gateway VoIP; VoIP Internet Telephony Gateway