IP COMMUNICATION TERMINAL HOUSING UNIT AND IP COMMUNICATION TERMINAL HOUSING SYSTEM

PROBLEM TO BE SOLVED: To allow an IP communication terminal in a LAN to appropriately acquire a global IP address, regardless of the type of an external router in an IP-PBX.SOLUTION: An IP communication terminal housing system includes an IP-PBX, an L2 switch to which a plurality of IP communication terminals are connected, and an external router. The external router includes: LAN-side and WAN-side line housing sections; and a router section having a DHCP server function. The LAN-side line housing section is connected to the L2 switch, and the WAN-side line housing section is connected to a first line housing section on the LAN side of the IP-PBX. A second line housing section on the LAN side of the IP-PBX is connected to the L2 switch. A transfer control section permits or refuse a transfer of a DHCP Request packet from the second line housing section on the LAN side of the IP-PBX to the first line housing section on the LAN side of the IP-PBX in accordance with a preset content.SELECTED DRAWING: Figure 1 【課題】 ＩＰ−ＰＢＸの外部ルータの種類に拘らず、ＬＡＮのＩＰ通信端末がグローバルなＩＰアドレスを適切に取得できるようにする。【解決手段】 ＩＰ−ＰＢＸと、複数のＩＰ通信端末が接続されたＬ２スイッチと、外部ルータとを有する。外部ルータは、ＬＡＮ側及びＷＡＮ側回線収容部と、ＤＨＣＰサーバ機能を有するルータ部とを有し、ＬＡＮ側回線収容部がＬ２スイッチに接続され、ＷＡＮ側回線収容部はＩＰ−ＰＢＸのＬＡＮ側第１回線収容部に接続されている。ＩＰ−ＰＢＸのＬＡＮ側第２回線収容部がＬ２スイッチに接続されている。ＩＰ−ＰＢＸのＬＡＮ側第２回線収容部から第１回線収容部へのＤＨＣＰ Ｒｅｑｕｅｓｔパケットの転送を転送制御部が予め設定された内容に従って許可又は拒否する。【選択図】 図１