call signal
61Distress 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… …
62At call — Call Call, n. 1. The act of calling; usually with the voice, but often otherwise, as by signs, the sound of some instrument, or by writing; a summons; an entreaty; an invitation; as, a call for help; the bugle s call. Call of the trumpet. Shak.… …
63On call — Call Call, n. 1. The act of calling; usually with the voice, but often otherwise, as by signs, the sound of some instrument, or by writing; a summons; an entreaty; an invitation; as, a call for help; the bugle s call. Call of the trumpet. Shak.… …
64Mobile phone signal — A display of bars on a mobile phone screen A mobile phone signal (or reception) is the strength (measured in dBm) of the connection to the mobile phone with its network. Depending on various factors, such as proximity to a tower, obstructions… …
65North American call sign — Many countries have specific conventions for classifying call signs by transmitter characteristics and location. The North American call sign format for radio and television call signs follows a number of conventions. All call signs begin with a… …
66Mayday (distress signal) — Mayday is an emergency code word used internationally as a distress signal in voice procedure radio communications. It derives from the French venez m aider , meaning come help me . [ [http://www.etymonline.com/index.php?search=mayday… …
67Alpine distress signal — The Alpine distress signal is a distress signal in the case of mountain emergency, an emergency in alpine areas. There are also special emergency call numbers, for use with the telephone service by which the emergency services can be contacted.… …
68Telephone call — A telephone call is a connection over a telephone network between the calling party and the called party. Information transmissionA telephone call may carry ordinary voice transmission using a telephone, data transmission when the calling party… …
69Bat-Signal — Infobox comics elements name = Bat Signal imagesize = caption = The Gotham City Police Department with the Bat Signal. Cover of Gotham Central #1. Art by Michael Lark. publisher = DC Comics debut = Detective Comics #60 (February 1942) creators =… …
70Bugle call — A bugle call is a short tune, originating as a military signal announcing scheduled and certain non scheduled events on a military installation, battlefield, or ship. Historically bugle calls indicated the change in daily routines of camp. Each… …
