From the course: Learning VoIP and Unified Communications
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Passing telephony data through gateways
From the course: Learning VoIP and Unified Communications
Passing telephony data through gateways
- [Lisa] When a host sends media from one point to another, media passes through networks that will have different encoding, signaling, and bandwidth requirements. As media travels through networks, gateways are devices that adjust to the different network signaling requirements and convert media streams from one set of communication standards to another. Gateways include media gateways, call agents, or media gateway controller, or softswitch, signaling gateways, and translators and mixers. Various protocols are involved as well. Signaling transport or SIGTRAN is a telephony protocol that transports SS7 signals through the internet. Media gateway control protocol or Megaco works with H.323 or SIP. And call control protocols include SIP, H.323, and Skinny. A phone call can travel through various networks that include the public switch telephone network, the internet, and a LAN. As we look at this complex drawing, let's step…