タイトルまたは説明

SIP (session initiation protocol) is a request-response signaling protocol which closely resembles two other Internet protocols,  and SMTP (the protocols that power the  and consequently, SIP sits comfortably alongside Internet applications. Using SIP, telephony becomes another web application and integrates easily into other Internet services. SIP is a simple toolkit that service providers can use to build converged voice and multimedia services.
SIP (session initiation protocol) is a request-response signaling protocol which closely resembles two other Internet protocols,  and SMTP (the protocols that power the  and consequently, SIP sits comfortably alongside Internet applications. Using SIP, telephony becomes another web application and integrates easily into other Internet services. SIP is a simple toolkit that service providers can use to build converged voice and multimedia services.