Invention Grant
US08391444B2 IP telephone set, IP telephone system, and dialing method in the IP telephone set
有权
IP电话机，IP电话系统和IP电话机中的拨号方式
- Patent Title: IP telephone set, IP telephone system, and dialing method in the IP telephone set
- Patent Title (中): IP电话机，IP电话系统和IP电话机中的拨号方式
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Application No.: US12413292Application Date: 2009-03-27
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Publication No.: US08391444B2Publication Date: 2013-03-05
- Inventor: Takahito Yamamoto
- Applicant: Takahito Yamamoto
- Applicant Address: JP Tokyo
- Assignee: NEC Inforntia Corporation
- Current Assignee: NEC Inforntia Corporation
- Current Assignee Address: JP Tokyo
- Priority: JP2008-092826 20080331
- Main IPC: H04M11/00
- IPC: H04M11/00
Abstract:
An IP telephone set 4 is provided with a power failure adapter 5. During power failure, a function of the power failure adapter 5 is enabled so that the IP telephone set 4 is connected to an analog network 3 via the power failure adapter 5. As a result, the IP telephone set 4 is allowed to perform telephone communication via the analog network 3. The IP telephone set 4 includes an emergency call detecting portion 40a and a transmitting portion 40b. The emergency call detection portion 40a detects that an emergency telephone number is dialed as a dialed emergency telephone number. The transmitting portion 40b enables the function of the power failure adapter 5 when the emergency call detecting portion 40a detects that the emergency telephone number is dialed and transmits the dialed emergency telephone number to the analog network 3 via the power failure adapter 5.
Public/Granted literature
- US20090245478A1 IP TELEPHONE SET, IP TELEPHONE SYSTEM, AND DIALING METHOD IN THE IP TELEPHONE SET Public/Granted day:2009-10-01
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