Signal operating instructions — (SOI) is a U.S. military term for a type of combat order issued for the technical control and coordination of communications within a command. They include current and up to date information covering radio call signs and frequencies, a telephone… … Wikipedia
Signal Corps (United States Army) — U.S. Army Signal Corps Coat of Arms Active 3 March 1863 – Present Country … Wikipedia
Call Forwarding — Als Vermittlungstechnische Leistungsmerkmale (engl.: supplementary services), oder auch kurz Dienstmerkmale genannt, bezeichnet man bei einem öffentlichen Telekommunikationsnetz zusätzlich durch das Netz zur Verfügung gestellte teilnehmerbezogene … Deutsch Wikipedia
Distress signal — Call for help redirects here. For the TV show, see Call for Help. A distress signal is an internationally recognized means for obtaining help. Distress signals take the form of or are commonly made by using radio signals, displaying a visually… … Wikipedia
Alarm signal — In the field of animal communication, an alarm signal is an antipredator adaptation referring to various signals emitted by social animals in response to danger. Many primates and birds have elaborate alarm calls for warning conspecifics of… … Wikipedia
Traffic signal preemption — is a type of system that allows the normal operation of traffic lights to be preempted, often to assist emergency vehicles.[1][2] The most common use of these systems is to manipulate traffic signals in the path of an emergency vehicle, stopping… … Wikipedia
Explicit Call Transfer — Als Vermittlungstechnische Leistungsmerkmale (engl.: supplementary services), oder auch kurz Dienstmerkmale genannt, bezeichnet man bei einem öffentlichen Telekommunikationsnetz zusätzlich durch das Netz zur Verfügung gestellte teilnehmerbezogene … Deutsch Wikipedia
Busy signal — For other uses, see Busy signal (disambiguation). A busy signal (or busy tone or engaged tone) in telephony is an audible or visual signal to the calling party that indicates failure to complete the requested connection of that particular… … Wikipedia
Time signal — These automatic signal clocks were synchronized by telegraphy in 1905 before the widespread use of radio A time signal is a visible, audible, mechanical, or electronic signal used as a reference to determine the time of day. Contents 1 Audible… … Wikipedia
distress signal — 1. a signal used, or designed to be used, by persons in peril, for the purpose of summoning aid, indicating their position, etc., as a radio code sign, aerial flare, flag hoist, or the like. Cf. distress call (def. 1). 2. an indication, esp. a… … Universalium