JP2005026898A - Emergency connection system for ip telephone set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency connection system for an IP telephone set enabling an outside line call by connection switching to a general public network without enlarging a scale of an apparatus even if a fault occurs to an IP network or power supply is disconnected by power fail or the like. <P>SOLUTION: The IP telephone set 4 monitors power source information and IP network information and, at a normal time, is connected to an IP network 2, and calls as an extension IP telephone set under an IP-PBX 1. If a fault occurs and either the power source information or the IP network information or both of them become abnormal, the IP telephone set is connected to the general public network 3 via a gateway 5, and calls as the outside line telephone set. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an emergency connection system for an IP telephone that can be connected to an IP network.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, an IP-PBX local area network has been established that can use an IP telephone as an internal line telephone using an IP network and connect a general public network as an external line. In the PBX provided in the IP network, the voice signal is packetized and transmitted. However, when a failure or congestion occurs in the IP network, the packetized signal is not reproduced in real time. There was a problem that would decrease. In addition, there is a problem that the serviceability is deteriorated because the voice signal cannot be diverted from the signal path via the IP network to the TDM dedicated line or the public network.
[0003]
Therefore, according to the Internet protocol network bypass system disclosed in Patent Document 1, when an audio signal transmitted from an extension telephone is transmitted on an Internet protocol network (hereinafter, IPNW), transmission transmitted from the IPNW is performed. The IPNW congestion state is determined by the call control unit based on the packet for the user, and when it is determined that the congestion state is present, the voice signal is switched by the switch control unit, and the voice signal is bypassed from the IPNW to the rest. Yes.
[0004]
Further, the telephone device adapter disclosed in Patent Document 2 can be connected to either the IPNW side, which is a digital communication line, or the public line, which is an analog communication line, as necessary, while the signal line from the telephone device is connected. It is aimed.
When communication via the IPNW is possible, a call can be made via the IPNW, and when the IPNW is not available, a call can be made via the public line.
[0005]
[Patent Document 1]
JP 2000-349901 A [Patent Document 2]
JP-A-2001-257797 [0006]
[Problems to be solved by the invention]
However, since Patent Document 1 is configured to accommodate a plurality of extension telephones, there is a problem in that it has a conventional PBX configuration such as a switch control unit and an announcement trunk, resulting in an increase in scale. In addition, since the telephone and the adapter are separated, there is a problem that a telephone call cannot be made when the local power supply for supplying power to the adapter is cut off. Furthermore, since the recent IPNW failure causes a failure of the line port unit on the LANSW or the SW itself, it is necessary to switch all terminals when an IPNW failure occurs, resulting in poor serviceability. It was.
[0007]
In Patent Document 2, since the telephone and the adapter are separated, there is a problem that it is not clear whether a call can be made when the local power supply for supplying power to the adapter is cut off. In addition, since a part of the functions in the conventional telephone is also in the adapter, there is a problem that it is functionally redundant.
[0008]
[Means for Solving the Problems]
The present invention provides an emergency connection system for an IP telephone in which an IP network and a general public network are connected by a gateway, and an IP telephone on the IP network is connected to the gateway. A power monitoring unit that monitors information; an IP network monitoring unit that monitors information on the IP network; and if both the power information and the IP network information are normal, the power supply information A call switching unit that determines that a failure state occurs if one or both of the IP network information is abnormal and connects to the general public network through the gateway.
[0009]
Further, the IP telephone monitors a call when connected to the general public network, and a call monitor that suppresses switching to the IP network until the call ends even if the failure state is canceled It has the part.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an IP network configuration by IP-PBX 1 which is an embodiment of an emergency connection system for IP telephones according to the present invention. An IP telephone 4 and a gateway 5 for connecting to the general public network 3 are connected on the IP network 2. The IP telephone 4 and the gateway 5 are connected by a communication line 6 using an RJ11 connector. As a result, the IP telephone 4 can realize connection with the IP network 2 and connection with the general public network 3.
[0011]
FIG. 2 is a block diagram showing an internal configuration in the IP telephone 4. The IP telephone 4 notifies the call switching control unit 44 of the power monitoring information 4 a by the power monitoring unit 42 and the network monitoring information 4 b by the IP network interface control unit 43. As a result, the function as an IP telephone through the RJ45 connector and the IP network interface control unit 43 in the normal time, and the function as an external line connection telephone through the RJ11 connector and the general public interface unit 46 in an emergency. It has a function.
[0012]
Next, the operation of this embodiment will be described with reference to the drawings. Referring to FIG. 2, the IP telephone 4 has an IP network interface control unit 43 that realizes an interface with the IP network. The IP network interface control unit 43 performs each process by inputting / outputting call control packets and voice packets via an RJ45 connector connected to the IP network. In addition, failure monitoring on the connected IP network is always performed, and network monitoring information 4b is transmitted to the call switching control unit 44.
[0013]
The general public network interface unit 46 is connected to the general public network 3 via the RJ11 connector and the gateway 5, and the IP telephone 4 can be directly connected to the general public network 3 in an emergency. When the IP telephone 4 is making a call through the general public network 3 in an emergency, the call monitoring unit 47 manages the call state even if the IP network is restored or the power supply is restored. Switching control to the normal state can be suppressed for the switching control unit 44 through the call monitoring information 4c. This switching control suppression is canceled when the call ends, and the call switching control unit 44 switches from the emergency connection to the normal connection.
[0014]
The power supply unit 41 supplies power to the IP network interface control unit 43. The power supply monitoring unit 42 always monitors the power supply state of the power supply unit 41, and transmits power supply monitoring information 4 a to the call switching control unit 44.
[0015]
The call switching control unit 44 controls switching of the communication path based on the network monitoring information 4b from the IP network interface control unit 43 and the power monitoring information 4a from the power monitoring unit 42. If both of the two status information items are in the normal state, the call switching control unit 44 outputs a call signal from the IP network interface control unit 43 to the handset interface unit 45, and the IP telephone 4 is an extension IP telephone under the IP-PBX1. Positioned.
[0016]
When a failure occurs and one or both of the power supply monitoring information 4a and the network monitoring information 4b become abnormal, the call switching control unit 44 switches the call path and sends the call signal to the general public network interface unit 46. Output. In this case, the IP telephone 4 deviates from the network configuration of the IP-PBX 1 and is directly connected to the general public network 3 as an external telephone under the gateway of the general public network 3.
[0017]
【The invention's effect】
As described above, according to the emergency connection system for an IP telephone according to the present invention, even when a failure occurs on the IP network or power supply is cut off due to a power failure or the like, the scale of the apparatus is not increased. An outside line call can be made by switching the connection to the general public network.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an embodiment of the present invention.
FIG. 2 is an internal configuration diagram of the IP telephone 4;
[Explanation of symbols]
1 IP-PBX
2 IP network 3 general public network 4 IP telephone 5 gateway 6 communication path 41 power supply unit 42 power supply monitoring unit 43 IP network interface control unit 44 call switching control unit 45 handset interface unit 46 general public network interface unit 47 call monitoring unit

Claims (2)

In an emergency connection system of an IP telephone in which an IP network and a general public network are connected by a gateway, and an IP telephone on the IP network is connected to the gateway, the IP telephone monitors power supply information of the IP telephone A power supply monitoring unit; an IP network monitoring unit that monitors information of the IP network; and if both the power supply information and the IP network information are normal, the power supply information and the IP network information are connected. An emergency connection system for an IP telephone, comprising: a call switching unit that determines that a failure state is detected if either or both of these are abnormal and connects to the general public network through the gateway. The IP telephone monitors a call while being connected to the general public network, and suppresses switching to the IP network until the call ends even if the failure state is canceled The emergency connection system for IP telephones according to claim 1, wherein

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