Title:
ゲートウェイ装置、ONT及びPONシステム
Document Type and Number:
Japanese Patent JP4470963
Kind Code:
B2
Abstract:
In a broadband access network, calls can be kept active even when a telephone network fails. A voice gateway function captures callee telephone number information sent from a caller subscriber telephone to the telephone network and, when the telephone network fails, keeps the call active by retaining the connection between the caller and the callee. Furthermore, when the telephone network fails, the operation mode of the voice gateway and all ONTs is switched from an H.248 gateway mode to an SIP softswitch mode, allowing the voice gateway function to relay communication packets between ONTs and new call connections to be made in the broadband access network.
Inventors:
Mari Takihiro
Naohiro Yoshida
Tetsuhiko Takahashi
Mitsui
Ryuji Ishii
Naohiro Yoshida
Tetsuhiko Takahashi
Mitsui
Ryuji Ishii
Application Number:
JP2007146425A
Publication Date:
June 02, 2010
Filing Date:
June 01, 2007
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H04M3/00; H04L12/44
Domestic Patent References:
| JP2004104438A | ||||
| JP2007104689A | ||||
| JP2004186766A | ||||
| JP2003124967A | ||||
| JP2006013793A | ||||
| JP7059132A |
Attorney, Agent or Firm:
Manabu Inoue