A Study on methods of MCID(Multimedia Caller IDentification) supplementary service based on SIP

MCID(Multimedia Caller identification) service allows the user to allocate and send distinctive caller information to a called party. When the user (calling party) makes a communication, the pre-selected contents (e.g. video business card) are played to user equipment of the called party, until the called party answers. The media types of contents presented to the called party may be audio, video, image or text.