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.

A measure of the ability of a receiver to discriminate between a wanted signal on one frequency and unwanted signals on other frequencies.

1. A procedure in which a transmitting station , i.e., a calling station, establishes its own validity without the participation of the receiving station, i.e., the called station.
Note: The calling station establishes its own authenticity and the called station is not required to challenge the calling station. Self- authentication is usually used only when one- time authentication systems are… (Read More →)