Acronym for selective calling. Calling from one station in which call identification is sent to signal automatically one or more remote stations and to establish links among them.
Note 1: Selective calling may be used to un-mute the speakers at designated stations or to initiate a handshake for link establishment.
Note 2: Selective calling is specified in ITU-R Recommendations for… (Read More →)

For a particular message path, any intermediate network between a branch point and a subsequent branch point or convergence point is a selected network. [T1.118-1992]

Synonym decision instant.

See selcall.

Synonym maximal-ratio combiner.

Fading in which the components of the received radio signal fluctuate independently.

The protection of specific fields within a message which is to be transmitted [7498-2].

See electronic warfare.

In a party line, ringing only the desired user instrument.
Note: Without selective ringing, all the instruments on the party line will ring at the same time, selection being made by the number of rings.

An element of the emergency services network that provides routing information for emergency calls based on geographic information. It provides the association of an originating (or calling) telephone number to a PSAP that is the terminating point that handles emergency calls for the area that contains the origination number.