A SIP address or SIP URI scheme is a Uniform Resource Identifier (URI) scheme that addresses a specific telephone extension on a voice over IP system (such as a private branch exchange) or an E.164 telephone number dialled through a specific gateway.
A SIP address or SIP URI scheme is a Uniform Resource Identifier (URI) scheme for the Session Initiation Protocol that addresses a specific telephone extension on a voice over IP system. Such a number could be a private branch exchange or an E.164 telephone number dialled through a specific gateway.