system busy signal

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• signal — sig|nal1 W2S3 [ˈsıgnəl] n [Date: 1300 1400; : Old French; Origin: signale, from Medieval Latin, from Late Latin signalis of a sign , from Latin signum; SIGN1] 1.) a sound or action that you make in order to give information to someone or tell… …   Dictionary of contemporary English

• signal — sig|nal1 [ sıgnəl ] noun count *** ▸ 1 movement/sound ▸ 2 sign about future ▸ 3 electronic information ▸ 4 for controlling traffic ▸ 5 information sent 1. ) a movement or sound made by someone that has a special meaning to another person: signal… …   Usage of the words and phrases in modern English

• Signal box — A signal box or signal cabin is a building from which railway signals and points are controlled. The term signal cabin is used in Ireland, parts of Scotland and in Australia while in North America, the term interlocking tower predominates.… …   Wikipedia

• System Shock — Infobox VG title = System Shock developer = Looking Glass Studios publisher = Origin Systems/Electronic Arts designer = Doug Church engine = Enhanced Underworld engine released = March 26, 1994cite web |… …   Wikipedia

• Trunked radio system — or other entity.In 1997, radio scanners compatible with trunked systems appeared on the market. One of the first companies to bring these devices to market, Uniden, trademarked the term trunk tracking on December 5, 1997. [US Patent and Trademark …   Wikipedia

• Signaling System 7 — Signaling System #7 (SS7) is a set of telephony signaling protocols which are used to set up most of the world s public switched telephone network telephone calls. The main purpose is to set up and tear down telephone calls. Other uses include… …   Wikipedia

• Signalling System No. 7 — SS7 protocol suite OSI layer SS7 protocols Application INAP, MAP, IS 41... TCAP, CAP, ISUP, ... Network MTP Level 3 + SCCP Data link MTP Level 2 …   Wikipedia

• Continuous Tone-Coded Squelch System — In telecommunications, Continuous Tone Coded Squelch System or CTCSS is a circuit that is used to reduce the annoyance of listening to other users on a shared two way radio communications channel. It is sometimes called tone squelch. Where more… …   Wikipedia

• Alarm indication signal — (AIS) is a signal transmitted by a system that is part of a concatenated telecommunications system to let the receiver know that some remote part of the end to end link has failed at a logical or physical level, even if the system it is directly… …   Wikipedia

• Automatic Identification System — The Automatic Identification System (AIS) is a system used by ships and Vessel Traffic Services (VTS) principally for identification and locating vessels. AIS provides a means for ships to electronically exchange ship data including:… …   Wikipedia

• IBM System/36 — The IBM System/36 was a minicomputer marketed by IBM from 1983 to 2000. It was a multi user, multi tasking successor to the System/34. Like the System/34 and the older System/32, the System/36 was primarily programmed in the RPG II language. One… …   Wikipedia