Editing Camp-on busy signal

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In [[telecommunications]], the term '''camp-on busy signal''' has the following meanings: 

*A signal that informs a busy [[telephone]] [[User (telecommunications)|user]] that another [[call originator]] is waiting for a [[telecommunication connection|connection]]. Synonym: ''[[call waiting]]''
*A [[teleprinter]] [[telephone exchange|exchange]] [[Facility (telecommunications)|facility]] signal that automatically causes a calling station to retry the call-receiver number after a given interval when the call-receiver teleprinter is occupied or the circuits are busy. Synonym: ''speed-up tone''

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[[Category:Telephony signals]]
[[Category:Telegrams]]