Title:
無線IP電話システム
Document Type and Number:
Japanese Patent JP4548225
Kind Code:
B2
Abstract:
A wireless IP telephone system including a dynamic address lease server for leasing an IP address to each of terminals and a controller. The controller has information about the IP address, a SIP URI of the terminal, a type thereof, and a function thereof. The information of the controller is dynamically set by a system administrator who manually sets the information or by the dynamic address lease server and the controller which are cooperated. The controller decides an effective period of the address to be leased to each terminal, informs the dynamic address lease server of the fact, and requires the address lease server to release the address which became unnecessary.
Inventors:
Go Ono
Kazuma Yumoto
Small High Hiro
Kazuma Yumoto
Small High Hiro
Application Number:
JP2005156581A
Publication Date:
September 22, 2010
Filing Date:
May 30, 2005
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04W8/26; H04L12/70; H04M3/00; H04W60/00; H04W84/12; H04W84/16; H04W88/08
Domestic Patent References:
| JP6062020A | ||||
| JP2001045050A | ||||
| JP2003273899A | ||||
| JP2003289312A | ||||
| JP2003204330A |
Attorney, Agent or Firm:
Manabu Inoue