| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a telephone system which utilizes a telephone set utilized even in a specific area (including foreign countries) as it is, continues to utilize a telephone number used in the specific area even as for the telephone number, has a convenience property both to a caller side and to a called side, secures several tens of telephone circuits or more, and reduces a load to a server of the system further. <P>SOLUTION: Instead of a fixed telephone connected to a public transmission circuit network 8 in the specific area, a router 3a provided with a PBX function and a VoIP function is connected, the router 3a is connected to other similar router 3b which makes a pair together with the router 3a through an Internet 4, other router 3b is connected to the fixed telephone 9 which has been used until now, and a relation between both routers is managed by a management server 1 through the Internet. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
