Ma'anar: SIP - Yarjejeniyar Zama-Zama - Yarjejeniya ce ta hanyar sadarwar da ake amfani dasu don Voice over IP (VoIP) . A cikin sadarwar VoIP , SIP wata hanya ce ta hanyar yin amfani da ka'idoji na H.323 .
An tsara SIP don tallafawa siffofin kira na tsarin tarho na al'ada. Duk da haka, ba kamar fasahar SS7 na gargajiya na wayar salula ba, SIP wata yarjejeniya ce ta abokin kirki. SIP kuma mahimmin ƙirar manufofin sadarwa ne na sadarwa ba'a iyakance ga aikace-aikacen murya ba.