A protocol converter that interfaces a traditional public switched telephone network (PSTN), or device running PSTN protocols, with a device running the Internet protocol (IP) suite.
A small IPBX system sized for small business enterprise (SBE) applications up to a dozen or so extensions, or perhaps small-to-medium enterprise (SME) applications up to 50 or so extensions. A media gateway also can be networked with a larger media server, media manager, or communication manager that serves a larger regional office. See also IPBX.
In H.323-compliant multimedia networks, a gateway is an optional element used for various levels of protocol conversion.The gateway serves as a protocol converter between devices and networks that have native H.323 capability and those that do not.The gateway also may translate between audio, video, and data formats, and may perform signaling conversions between the H.225 packet protocol and external protocols such as SS7 and Q.931. Alternatively, signaling conversions may be performed by gatekeepers, call processors, or session border controllers. See also H.225, H.323, multimedia, network, packet, protocol, protocol converter, Q.931, session, and SS7.