VoIP terminal apparatus, VoIP communication system and presence check method thereof

摘要

A Voice over Internet Protocol(VoIP) terminal apparatus includes: a user input part; a display; a communication part, which communicates through a network; a storage part which stores a subscriber information of a plurality of remote subscribers; and a controller which stores the subscriber information inputted through the user input part in the storage part, displays the subscriber information stored in the storage part on the display if a communication mode is inputted through the user input part, and controls the communication part to request a presence information of a remote subscriber according to an established condition from a Session Initiation Protocol(SIP)/presence server.