SIP Deutsch: SIP, was ist das?
SIP German: SIP, what is it?
SIP is the abbreviation for Session Initiation Protocol - a network protocol for establishing, controlling and terminating communication between two or more subscribers. The SIP protocol is specified in RFC 3261 and is frequently used in IP telephony. A Swiss SIP telephone connection forms the interface between the public telephone network and a VoIP telephone or such a telephone system. This means that calls can be made over the Internet using a conventional Swiss telephone number.
