Signaling Gateway

Signaling Gateway Function

Abbreviation for Standard Generalized Mark-up Language. A file format for storage of text and graphics files.

Serving GPRS Support Node

In secure systems, a permutation of the bits in a byte or other data unit, which permutation is used to increase redundancy during the signature process. [After X9.31-1]

1. The attenuation caused to a radio signal by obstructions in the propagation path.
2. In a reflector antenna, the relative reduction in the effective aperture of the antenna caused by the masking effect of other antenna parts, such as a feed horn or a secondary reflector, which parts obstruct the radiation path.

The unit of information derived from the occurrence of one of two equiprobable, mutually exclusive, and exhaustive events.
Note: A bit may, with perfect formatting and source coding, contain 1 Sh of information. However, the information content of a bit is usually be less than 1 Sh.

A statement defining the theoretical maximum rate at which error-free digits can be transmitted over a bandwidth-limited channel in the presence of noise, usually expressed in the form C = W log2(1 + S/N), where C is the channel capacity in bits per second, W is the bandwidth in hertz, and S/N is the signal-to-noise ratio.
Note: Error-correction codes can… (Read More →)

A network inserted in a circuit for the purpose of improving or modifying the waveform of signals.

A service link connection that can be used by any service customer (SC) in a predefined set of SCs on a first-come, first-service-basis; that is, during a specific time period, only one SC can use the service link connection, and the right to use the service link connection is assigned on a first-come, first-served basis. [After T1.263-1998]