SIP is a signaling protocol widely used for controlling multimedia communication sessions such as voice and video calls over IP (Internet Protocol). SIP is used to create, modify and terminate two-party (unicast) or multiparty (multicast) sessions consisting of one or several media streams. Other feasible application examples include video conferencing, streaming multimedia distribution, instant messaging, presence information and online games.

SIP is a signaling protocol widely used for controlling multimedia communication sessions such as voice and video calls over IP (Internet Protocol). SIP is used to create, modify and terminate two-party (unicast) or multiparty (multicast) sessions consisting of one or several media streams. Other feasible application examples include video conferencing, streaming multimedia distribution, instant messaging, presence information and online games.