In an automatic cellular mobile system, the interface between the radio system and the public switched telephone network.
Note: The MSC performs all signaling functions that are necessary to establish calls to and from mobile stations.

1. A station in the mobile service intended to be used while in motion or during halts at unspecified points. [NTIA] [RR] [47CFR]
2. One or more transmitters that are capable of operation while in motion. [47CFR]

A dialable number and, in the context of this document, a 10-digit NANP (North American Numbering Plan) directory number assigned to address a wireless service subscriber. [T1.708-1998]

A radiocommunication service:between mobile earth stations and one or more space stations, or between space stations used by this service; or
between mobile earth stations by means of one or more space stations. This service may also include feeder links necessary for its operation. [NTIA] [RR] [47CFR]

Music/Movies on Demand

Incorrect synonym for multimode distortion.

Synonym multimode distortion.

In an optical waveguide operating at a given wavelength, the number of modes supported, and their propagation time differences.

In an open waveguide, such as an optical fiber, a loss of energy on the part of an electromagnetic wave due to obstacles outside the waveguide, abrupt changes in direction of the waveguide, or other anomalies, that cause changes in the propagation mode of the wave in the waveguide.

Noise generated in an optical fiber system by the combination of mode-dependent optical losses and fluctuation in the distribution of optical energy among the guided modes or in the relative phases of the guided modes. Synonym speckle noise.