IP TELEPHONE SET, IP TELEPHONE SYSTEM, AND DIALING METHOD IN THE IP TELEPHONE SET

• US 20090245478A1
• Filed: 03/27/2009
• Published: 10/01/2009
• Est. Priority Date: 03/31/2008
• Status: Active Grant

• Current Assignee: NEC Platforms, Ltd. (NEC Corporation)
• Original Assignee: NEC Infrontia Corporation (NEC Corporation)
• Inventors: YAMAMOTO, TAKAHITO
• Granted Patent: US 8,391,444 B2
• Time in Patent Office: Days
• US Class Current: 379/39
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04M 1/2535 adapted for voice communication over an Internet Protocol [IP] network Voice over Internet Protocol (VoIP) network equipment and services H04M7/006; implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP] H04L69/16
• CPC Class Codes: H04M 11/04 with alarm systems, e.g. fire, police or burglar alarm systems
• CPC Class Codes: H04W 76/50 for emergency connections

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.

Claims

1. An IP telephone set having a power failure adapter whose function is enabled during power failure so that the IP telephone set is connected to an analog network via the power failure adapter and is allowed to perform telephone communication via the analog network, the IP telephone set comprising:

an emergency call detecting portion for detecting that an emergency telephone number is dialed as a dialed emergency telephone number; and

a call transmitting portion for enabling the function of the power failure adapter when the emergency call detecting portion detects that the emergency telephone number is dialed and transmitting the dialed emergency telephone number to the analog network via the power failure adapter.

2. The IP telephone set as claimed in claim 1, wherein, in a normal mode, the IP telephone set is connected to an IP network and is allowed to perform telephone communication via the IP network.

3. The IP telephone set as claimed in claim 1, wherein, in a normal mode, the IP telephone set is connected to an IP-PBX via an IP network and is allowed to perform telephone communication via the IP network and the IP-PBX.

4. The IP telephone set as claimed in claim 2, further comprising;

a call termination detecting portion for detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication with the emergency call destination; and

a portion for disabling the function of the power failure adapter when the call termination detecting portion detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network.

5. The IP telephone set as claimed in claim 3, further comprising:

a call termination detecting portion for detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication with the emergency call destination; and

a portion for disabling the function of the power failure adapter when the call termination detecting portion detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network and the IP-PBX.

6. The IP telephone set as claimed in claim 2, further comprising:

a call termination detecting portion for detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication by a return call from the emergency call destination; and

a portion for disabling the function of the power failure adapter when the call termination detecting portion detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network.

7. The IP telephone set as claimed in claim 3, further comprising:

a call termination detecting portion for detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication by a return call from the emergency call destination; and

a portion for disabling the function of the power failure adapter when the call termination detecting portion detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network and the IP-PBX.

8. An IP telephone system comprising an IP-PBX and an IP telephone set, the IP telephone set being connected, in a normal mode, to the IP-PBX via an IP network and allowed to perform telephone communication via the IP network and the P-PBX, wherein:

the IP telephone set has a power failure adapter whose function is enabled during power failure so that the IP telephone set is connected to an analog network via the power failure adapter and is allowed to perform telephone communication via the analog network,

the IP telephone set comprising;

an emergency call detecting portion for detecting that an emergency telephone number is dialed as a dialed emergency telephone number; and

a call transmitting portion for enabling the function of the power failure adapter when the emergency call detecting portion detects that the emergency telephone number is dialed and for transmitting the dialed emergency telephone number to the analog network via the power failure adapter.

9. The IP telephone system as claimed in claim 8, wherein the IP telephone set further comprises:

a call termination detecting portion for detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication with the emergency call destination; and

a portion for disabling the function of the power failure adapter when the call termination detecting portion detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network and the IP-PBX.

10. The IP telephone system as claimed in claim 8, further comprising:

a call termination detecting portion for detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication by a return call from the emergency call destination; and

a portion for disabling the function of the power failure adapter when the call termination detecting portion detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network and the IP-PBX.

11. A dialing method in an IP telephone set having a power failure adapter whose function is enabled during power failure so that the IP telephone set is connected to an analog network via the power failure adapter and is allowed to perform telephone communication via the analog network, wherein the dialing method comprises:

an emergency call detecting step of detecting that an emergency telephone number is dialed as a dialed emergency telephone number; and

a call transmitting step of enabling the function of the power failure adapter when the emergency call detecting step detects that the emergency telephone number is dialed and transmitting the dialed emergency telephone number to the analog network via the power failure adapter.

12. The dialing method as claimed in claim 11, wherein, in a normal mode, the IP telephone set is connected to an IP network and is allowed to perform telephone communication via the IP network,

the dialing method further comprising:

a call termination detecting step of detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication with the emergency call destination; and

a step of disabling the function of the power failure adapter when the call termination detecting step detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network.

13. The dialing method as claimed in claim 11, wherein, in a normal mode, the IP telephone set is connected to an IP-PBX via an IP network and is allowed to perform telephone communication via the IP network and the IP-PBX,

the dialing method further comprising:

a call termination detecting step of detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication with the emergency call destination; and

a step of disabling the function of the power failure adapter when the call termination detecting step detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network and the IP-PBX.

14. The dialing method as claimed in claim 11, wherein, in a normal mode, the IP telephone set is connected to an IP network and is allowed to perform telephone communication via the IP network,

the dialing method further comprising:

a call termination detecting step of detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication by a return call from the emergency call destination; and

a step of disabling the function of the power failure adapter when the call termination detecting step detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network.

15. The dialing method as claimed in claim 11, wherein, in a normal mode, the IP telephone set is connected to an IP-PBX via an IP network and is allowed to perform telephone communication via the IP network and the IP-PBX,

the dialing method further comprising:

a call termination detecting step of detecting, after the dialed emergency telephone number is transmitted toward an emergency call destination, termination of telephone communication by a return call from the emergency call destination; and

a step of disabling the function of the power failure adapter when the call termination detecting step detects the termination of telephone communication and restoring the normal mode in which the IP telephone set is connected to the IP network and is allowed to perform telephone communication via the IP network and the IP-PBX.