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Motorola "Quik Call I" codes; Emergency!

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Uploaded on Jul 28, 2008

A clip from Emergency! that shows various call tones.


The tones heard before the station alarm is activated are actual Motorola "Quik Call I" codes, which were used by LACoFD until the 1990s. At the time of filming, an LACoFD station's main base station radio was usually in "quiet" mode, so the crew on duty wouldn't have to hear every transmission over the fire channel at all hours. Although only two tones could be heard for each station dispatched to an alarm, the Quik Call system actually used two sets of tones (four total) to activate station alarms. When a dispatcher selected one or more stations to be "toned out", the Quik Call system would transmit the first set of tones which would unsquelch the radio at one or more stations and turn on their loudspeakers, closely followed by a second set of tones for each individual station which could be heard and which activated the intended station's alarm klaxon. The Quik Call tones for station 51 were LZPZ-HZKZ, also known as 1 second of 794.3 Hz + 1084.0 Hz followed by 3 seconds of 582.1 Hz + 716.7 Hz.

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