An XML application to define rules for call processing (e.g. to route all calls to a cell phone during lunchtime). Decisions can be made upon the calling party number or the called party number, date or time - just to name a few, while actions usually include rejection or redirections of calls.
A standard methodology with formal syntax for adding information to a document relating to its structure and/or content by applying identifiers for elements of information in a neutral way, stored in a neutral form, independent of systems, devices and applications.
In the H.323 world, the gatekeeper provides several important functions. First, it controls access to the network, allowing or denying calls and controlling the bandwidth of a call. Second, it helps with address resolution, making possible email type names for end users, and converting those into the appropriate network addresses. Also handles call tracking and billing, and call signaling.
See Gatekeeper.
A gateway is a communication instance that translates (call) data
between different networks (e.g. IP and PSTN) or protocols. A
signaling gateway translates between two or more
signaling protocols (like H.323 or SIP), while a media gateway
usually performs transcoding of media streams (e.g. G.711 to
GSM).
Of course a gateway may as well combine all functionality described above.
See Gateway.
ITU standard for videoconferencing over packet switched networks such as Internet.
See H.323.
A protocol for IP telephony that enables a caller with a PSTN phone number to locate the destination device and establish a session.
A device used by organisations to allow a single access number to offer multiple lines to outside callers, and to allow internal staff to share a range of external lines.
The worldwide voice telephone network.
See Quality of Service.
Measure of performance for a transmission system that reflects its transmission quality and service availability.
RTP is designed to provide end-to-end network transport functions for applications transmitting real-time data, such as audio, video, or simulation data, over multicast or unicast network services.
See Real Time Protocol.
IETF standard for session initiation in multi-purpose communication systems.
The transmission of voice over data networks that uses the Internet Protocol (IP).
See Voice over IP.