indefinite call sign
1. A
call sign that represents a group of facilities, commands, authorities, activities, or units rather than one of these. 2. In
radio communications, a call sign that does not identify a
station and that is used in the call-up
signal or in a
message that has the station call sign encrypted in the text. [
From Weik '89]
indefinite call sign
A call sign which does not represent a specific facility, command, authority, activity, or unit, but which may represent any one or any group of these. See also call sign. 1/3/73
indicatif d'appel indéfini
Indicatif d'appel ne représentant pas une station de transmissions, un commandement, une autorité, un organisme ou une unité déterminée, mais pouvant représenter l'un quelconque ou un groupe quelconque d'entre eux. Voir aussi indicatif d'appel. 1/3/73