Quik Call I
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High Quality Content by WIKIPEDIA articles! Quik-Call I, also known as 2+2, is a selective calling method originally used in one-way paging receivers. In US fire service use, the tones are sometimes referred to as ringdown tones. The Quik-Call name is a trademark of Motorola. A Quik-Call format call sends a pair of tones followed by 50 to 1,000 milliseconds of silence and then a second pair of tones. Decoders look for a valid first tone pair followed by a valid second tone pair within a defined length of time, (a time window). For example, a decoder detecting a valid first tone pair might…mehr

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High Quality Content by WIKIPEDIA articles! Quik-Call I, also known as 2+2, is a selective calling method originally used in one-way paging receivers. In US fire service use, the tones are sometimes referred to as ringdown tones. The Quik-Call name is a trademark of Motorola. A Quik-Call format call sends a pair of tones followed by 50 to 1,000 milliseconds of silence and then a second pair of tones. Decoders look for a valid first tone pair followed by a valid second tone pair within a defined length of time, (a time window). For example, a decoder detecting a valid first tone pair might allow up to 4 seconds for a valid second tone pair to be decoded. If no valid second tone is decoded within 4 seconds, the decoder resets and waits for another valid first tone pair.