media gateway controller
Abbreviated as MGC, media gateway controller is a system used in some VoIP architectures. MGC handles the registration and management of resources at the media gateway. A media gateway controller exchanges messages with central office switches via a signaling gateway. A media gateway controller is sometimes called a call agent, call controller, or softswitch.
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- media server
In Internet and online communications, the media server processes all multimedia applications, such as call distribution, on-demand faxing, e-mail programs and others. In VoIP specific applications, the media server possesses and generates the media streams and handles all functions related to tasks such as decoding tones, bridging multiple streams, processing scripts, and recording audio.
- medium dependent interface
Abbreviated MDI, an Ethernet port connection that allows network hubs or switches to connect to other hubs or switches without a null-modem, or crossover, cable. Compare with MDIX. A medium dependent interface is also referred to as an MDI port or an uplink port.
- mega
In decimal systems, the prefix mega means one million, but in binary systems, mega stands for 2 to the 20th power, or 1,048,576. One megabyte, therefore, is either 1,000,000 or 1,048,576 bytes (this is equivalent to 1,024K), depending on the context.
- megabit
(1) When used to describe data storage, 1,024 kilobits. (2) When used to described data transfer rates, it refers to one million bits. Networks are often measured in megabits per second, abbreviated as Mbps.
- megapixel
One million pixels. The term is used in reference to the resolution of a graphics device, such as a scanner, digital camera or monitor.