Vertical service code
In North American telephony, a vertical service code or VSC is a special code dialed prior to a telephone number that engages some type of special telephone service.
Vertical service codeCaller IDNorth American Numbering PlanGSM codes for supplementary servicesLast-call returnN11 codeAsteriskAbbreviated dialingNationwide Wireless Priority ServiceAnonymous call rejectionCall forwardingList of telephony terminologyCall waitingAutomatic ring backDual-tone multi-frequency signalingVSCModel 500 telephonePrank callRequest lineAutomatic callback
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