| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To suppress communication capacity through an IP network between a PBX main body and one extension terminal 1 at a remote place as much as possible. <P>SOLUTION: This IP-PBX system is provided with the PBX main body accommodating a plurality of extension terminals and a satellite controller arranged at a remote place to communicate with the PBX main body through the IP network and accommodating the plurality of extension terminals including IP telephones. Here, the satellite controller has a switching means that can connect the accommodated extension terminals, and establishes a communication path without through the IP network between two extension terminals when the PBX main body needs call establishment between the extension terminals accommodated by the satellite terminals. The PBX main body and the satellite controller respectively perform data transfer of a communication channel through the IP network by a channel multiple IP packet with sound data of a plurality of channels inserted. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
