Vertical service code: Difference between revisions

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The # symbol on telephone dials and keypads is usually either called "pound" or "hash"
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{{use American English|date=September 2022}}
{{use MDY dates|date=September 2022}}
{{Expand German}}
A '''vertical service code''' ('''VSC''') is a sequence of digits and the signals [[asterisk|star]] (*) and [[number sign|pound/hash]] (#) dialed on a [[telephone keypad]] or [[rotary dial]] to enable or disable certain telephone service features.<ref name=":0" /> Some vertical service codes require dialing of a [[telephone number]] after the code sequence. On a [[touch tone]] telephone, the codes are usually initiated with the [[Asterisk#Telephony|star key]], resulting in the commonly used name ''star codes''. On rotary dial telephones, the star is replaced by dialing ''11''.