Title:
VoIP GATEWAY APPARATUS, AND METHOD FOR CONTROLLING CALL-IN/CALL-OUT IN VoIP GATEWAY APPARATUS
Document Type and Number:
WIPO Patent Application WO/2005/060226
Kind Code:
A1
Abstract:
A VoIP gateway apparatus is used to provide an IP centrex service to accommodated devices. The VoIP gateway apparatus (1) assigns, to a call originated from an accommodated device (PBX2), a telephone number for which the number of simultaneous call connections has not reached a simultaneous connection tolerance number, and sends the call to an IP centrex network (5) with the assigned telephone number used as a calling number. The VoIP gateway apparatus (1) includes a number-of-calls management part (105) and a SIP processing part (104). The number-of-calls management part (105) manages the number of the current simultaneous call connections for each of the telephone numbers as assigned to the apparatus. When a call is received from an accommodated device, a SIP processing part (104) selects, among the telephone numbers as assigned to the apparatus, a telephone number, for which the number of the current simultaneous call connections as managed by the number-of-calls management part (105) is smaller than the predetermined simultaneous connection tolerance number, and then transmits, to the IP centrex network (5), a SIP packet of a call control message to which the selected telephone number has been added as the calling number.
Inventors:
YAMADA NOBORU (JP)
AZUMA KAZUMASA (JP)
OKAMOTO KAZUHIRO (JP)
AZUMA KAZUMASA (JP)
OKAMOTO KAZUHIRO (JP)
Application Number:
PCT/JP2004/018899
Publication Date:
June 30, 2005
Filing Date:
December 17, 2004
Export Citation:
Assignee:
HITACHI COMM TECH LTD (JP)
YAMADA NOBORU (JP)
AZUMA KAZUMASA (JP)
OKAMOTO KAZUHIRO (JP)
YAMADA NOBORU (JP)
AZUMA KAZUMASA (JP)
OKAMOTO KAZUHIRO (JP)
International Classes:
H04L12/66; H04L29/06; H04M3/00; H04M7/00; H04L29/12; (IPC1-7): H04M3/00; H04M3/42; H04L12/66
Domestic Patent References:
| WO2002100083A1 | 2002-12-12 |
Foreign References:
| JP2003209621A | 2003-07-25 | |||
| JP2000050357A | 2000-02-18 | |||
| JPH11331371A | 1999-11-30 | |||
| JP2003258916A | 2003-09-12 | |||
| JPH02265345A | 1990-10-30 |
Attorney, Agent or Firm:
THE PATENT CORPORATE BODY SHOWYOU INTERNATIONAL (9-10 Kitasaiwai 2-chome, Nishi-k, Yokohama-shi Kanagawa 04, JP)
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