| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a voice conference system wherein operation from a terminal can establish and release an optional VLAN. <P>SOLUTION: VLAN recognition type switches 1 to 3 take notice of a VLAN ID of a parameter of a tag of the VLAN stipulated by the IEEE 802. IQ to perform filtering or the like for frames. A private branch exchange 4 and IP telephones 5 to 7 are VLAN recognition type end stations over a virtual bridge type network configured by the VLAN recognition type switches 1 to 3. The VLAN recognition type switches 1 to 3 make communication of information with the private branch exchange 4 and the IP telephones 5 to 7 by using the protocol GVRP. The private branch exchange 4 manages the VLAN IDs, and the IP telephones 5 to 7 make communication of VLAN control information including the VLAN IDs with the private branch exchange 4 and establish and release an optional VLAN by operation from the IP telephones 5 to 7. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
