| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve user's convenience and to enhance the quality of communication service by stabilizing a communication. <P>SOLUTION: The communication apparatus, which performs communication by establishing a session with another communication apparatus while utilizing a call control protocol, includes: a novel call port for receiving a novel call signal transmitted from a calling-side communication apparatus in novel call origination; and an under-connection-call port for receiving a call control signal transmitted from the calling-side communication apparatus after the novel call signal is received. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
