| 摘要 |
PROBLEM TO BE SOLVED: To provide an excellently convenient signaling relay device capable of providing additional function for holding/transfer, shaping, call-waiting telephone, simultaneous broadcasting, etc. SOLUTION: The signaling relay device includes an additional function means 5 which is connected between an IP communication network (one communication network) 2 and an IP communication network (the other communication network) 3 to enable the additional functions for holding/transferring of IP telephone sets (one communication terminal) a1, ..., ak, ..., an and IP telephone sets (the other communication terminal) b1, ..., bk, ..., bn, shaping packets to be transmitted, call-waiting telephone, and simultaneous broadcasting. COPYRIGHT: (C)2006,JPO&NCIPI |
