| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable smooth connection between an SIP server and a communication terminal or between communication terminals, even if a device that restricts or intercepts communication exists on a communication path. <P>SOLUTION: Among a plurality of sets of encapsulation methods and communication processing methods, each of a relay device and a communication terminal includes a capsule processing unit for searching for a set of an encapsulation method and a communication processing method that makes success in communication with a communication terminal or a relay device on the opposite side, and by applying the method successful in the search, for encapsulating or decapsulating an SIP message or a medium to perform communication. By the search, the device that restricts or intercepts can be passed through. <P>COPYRIGHT: (C)2013,JPO&INPIT |
