JP2004120715A - Ip telephone system, telephone terminal and inter-network tandem switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an IP (Internet protocol) telephone system in which emergency notice contents are transmitted to a destination for emergency notification and backward transmission from the destination for emergency notification to a person who has sent the emergency notification is surely performed in emergency notification via an IP network. <P>SOLUTION: When a communication path on an IP (Internet protocol) network is cut off by any reason such as overload in the middle of a call of emergency notification between the destinations 6 and 7 of emergency notification and a telephone terminal 1, items required for emergency notification are read out of a memory by the inter-network switching apparatus and sent to the parties 6 and 7 of emergency notification in voice by voice synthesis. After the communication path is cut off between the telephone terminal 1 which originates the call of emergency notification and the parties 6 and 7 of emergency notification, the inter-network switching apparatus monitors an incoming call transmitted backwards from the party of emergency notification via a public telephone network 5 and when the backward transmission is detected, the backward transmission is transferred to the telephone terminal 1 which originates the call of emergency notification. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to, for example, an IP (Internet Protocol) telephone system, and more particularly to an invention for an emergency call through an IP network.
[0002]
[Prior art]
2. Description of the Related Art There is provided an IP telephone system that performs telephone communication using VoIP (Voice over Internet Protocol), which is a technology for transmitting a voice signal using an IP network such as the Internet or an intranet. This IP telephone system is based on, for example, ITU-T Recommendation H.264, a standard for a general LAN (Local Area Network). 323 is used.
[0003]
In an IP network, a call voice signal is packetized every predetermined time length and transmitted sequentially over a LAN, and a transport layer protocol for that purpose is RTP (Real-time Transport Protocol). . In this RTP, the transmitting side transmits a packet with a packet sequence number (sequence number) and a time stamp (time information) added to the RTP header, and the receiving side transmits the packet based on the sequence number and the time stamp. By synchronizing the reproduction, the voice communication can be performed by performing the real-time operation.
[0004]
Calls between telephone terminals connected to the IP network can be performed by performing packet communication within the IP network as described above. A call with a telephone terminal connected to a conventional public telephone network outside the IP network is performed via a gateway device (including a gate keeper device if necessary) as an inter-network relay switching device. Can be.
[0005]
That is, the gateway device is connected to the IP network and connected to the public telephone network, and a call transmitted from a telephone terminal through the IP network to the other party connected to the public telephone network is transmitted to the other party through the public telephone network. When a response from the other party is confirmed, a communication path is formed between the other party and the telephone terminal.
[0006]
Further, when receiving a call from a partner connected to the public telephone network, if the call is directed to a telephone terminal connected to the IP network, the gateway device transmits the call through the IP network. Make the terminal receive a call. When the telephone terminal answers, a communication path is formed between the other party and the telephone terminal.
[0007]
As for the voice call information, the gateway device converts the voice packet received from the telephone terminal through the IP network into an analog voice signal by decomposing the packet and sending the analog voice signal to the other party through the public telephone network. The analog voice signal received from the other party through the network is converted into a digital signal, packetized, and sent to the telephone terminal through the IP network.
[0008]
By the way, an emergency call to a police station or a fire department is currently made as follows through a public telephone network such as an analog public network or ISDN (Integrated Services Digital Network).
[0009]
That is, when the caller makes a call using a special number such as "110" or "119", the exchange of the public telephone network receives the call at the communication control room of the police station or fire department in the area. Let it do. When a communication line is created in response to the communication command room in response to the emergency call, the communication line is held by the exchange. Therefore, even if the communication line is once opened on the reporter side, it is possible to reconnect with the reporter side by performing reverse communication from the communication command room. For this reason, the content of the emergency call is reliably transmitted from the caller to the operator in the communication command room.
[0010]
Also in the IP telephone system, it is conceivable that an emergency call can be made through a public telephone network through a gateway device from a telephone terminal.
[0011]
However, in the communication via the IP network, even if an emergency call is made, the connection quality is handled with the same connection quality as general communication, and if the communication on the IP network is disconnected due to overload or the like, Between the communication command room, which is the destination of the emergency call, and the telephone terminal connected to the IP network, the line is not maintained and the communication path is disconnected.
[0012]
Therefore, there is a problem in that the communication command room cannot reconnect to the telephone terminal that has made the emergency call, and the communication command room cannot capture who made the emergency call from where.
[0013]
As one of measures for solving this problem in the IP telephone system, for example, Patent Document 1 (Japanese Patent Application Laid-Open No. 2000-138752) discloses that an emergency line (emergency call) is called from a telephone terminal connected to an IP network. In such a case, an invention has been proposed in which switching is performed so as to directly connect to a communication command room, which is a destination of an emergency call, via a public telephone network instead of an IP network.
[0014]
That is, in the invention of Patent Document 1, an IP network and a public telephone network are connected to an IP telephone terminating device to which a telephone terminal is connected. It is determined whether or not it is an emergency call special number such as "110" or "119", and if it is a special number, a telephone terminal is connected to a public telephone network. Therefore, a special IP telephone terminator is required.
[0015]
[Patent Document 1]
JP-A-2000-138752.
[0016]
[Problems to be solved by the invention]
As described above, conventionally, as a method of making an emergency call through an IP network, the method of ensuring that the contents of the emergency call are sent to the emergency call destination even if the communication line is once opened, There is no one that ensures that the reverse communication from the party is received by the emergency caller.
[0017]
The present invention provides an IP telephone system capable of reliably transmitting the contents of an emergency call to an emergency call destination and back-facing an emergency caller from the emergency call destination in an emergency call via an IP network. The purpose is to do.
[0018]
[Means for Solving the Problems]
In order to solve the above problems, an IP telephone system according to the first aspect of the present invention provides:
One or more telephone terminals connected to an IP network and transmitting and receiving voice information as packetized data through the IP network;
Connected to the IP network and connected to a public telephone network to perform relay exchange processing of transmission / reception information between the IP network and the public telephone network; An inter-network relay switching device having a function of performing a relay process for an emergency call to a caller,
With
The telephone terminal,
A first storage unit that stores address information on the IP network of the inter-network relay switching device having a function of performing the process for the emergency call, and a setting information for the emergency call;
An input operation unit for receiving an input of a number of a call destination;
When receiving the telephone number of the destination of the emergency call through the input operation unit, the information including the telephone number of the destination of the emergency call and the emergency call setting information read from the first storage unit are included. Means for transmitting the call setting information to the inter-network relay switching device through the IP network using the address information in the first storage unit;
With
The inter-network relay switching device,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, the emergency call setting information included in the call setting information is stored. A second storage unit;
Voice synthesis means,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
During communication with the destination of the emergency call through the public telephone network, when a communication path between the telephone terminal through the IP network is interrupted, the emergency call stored in the second storage unit is disconnected. Means for converting the setting information into voice information by the voice synthesis means, and transmitting the voice information to the destination of the emergency call;
It is characterized by having.
[0019]
The IP telephone system according to the second aspect of the present invention
One or more telephone terminals connected to an IP network and transmitting and receiving voice information as packetized data through the IP network;
Connected to the IP network and connected to a public telephone network to perform relay exchange processing of transmission / reception information between the IP network and the public telephone network; An inter-network relay switching device having a function of performing a relay process for an emergency call to a caller,
With
The telephone terminal,
A first storage unit that stores at least address information on the IP network of the inter-network relay switching apparatus that has a function of performing the processing for the emergency call;
An input operation unit for receiving an input of a number of a call destination;
When receiving the telephone number input of the destination of the emergency call through the input operation unit, the call setting information including the information of the telephone number of the destination of the emergency call and the address information of the own terminal on the IP network, Means for sending to the inter-network relay switching device through the IP network using the address information in the storage unit of (1);
With
The inter-network relay switching device,
A second storage unit that stores in advance address information on the IP network of each of the telephone terminals connected to the IP network, and emergency call setting information in association with each other;
A third storage unit that stores address information on the IP network of the telephone terminal when receiving call setting information from the telephone terminal;
Voice synthesis means,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
When the communication path with the telephone terminal through the IP network is interrupted during communication with the destination of the emergency call through the public telephone network, the telephone stored in the third storage unit Using the address information of the terminal on the IP network, read out the emergency call setting information stored in the second storage unit, convert the information into voice information by the voice synthesis means, and Means to send to
It is characterized by having.
[0020]
The IP telephone system according to the third aspect of the present invention
One or more telephone terminals connected to an IP network and transmitting and receiving voice information as packetized data through the IP network;
Connected to the IP network and connected to a public telephone network to perform relay exchange processing of transmission / reception information between the IP network and the public telephone network; An inter-network relay exchange device having a function of performing a process for an emergency call to the other party of the call,
With
The telephone terminal,
A first storage unit that stores at least address information on the IP network of the inter-network relay switching apparatus that has a function of performing the processing for the emergency call;
An input operation unit for receiving an input of a number of a call destination;
When receiving the telephone number input of the destination of the emergency call through the input operation unit, the call setting information including the information of the telephone number of the destination of the emergency call and the address information of the own terminal on the IP network, Means for using the address information on the IP network in the first storage unit to send the address to the inter-network relay switching device via the IP network;
Control means for controlling so as to be able to respond only to an incoming call including information indicating the return of a predetermined emergency call after a communication path through the IP network with the inter-network relay switching device is disconnected. When,
With
The inter-network relay switching device,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, an address on the IP network of the telephone terminal included in the call setting information A second storage unit for storing information;
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
Reverse communication for monitoring the reception of reverse communication from the other party of the emergency call through the public telephone network when the communication path through the IP network with the telephone terminal that has issued the emergency call is disconnected. Monitoring means;
When the reverse monitoring means detects the reception of the reverse communication, the reverse communication is performed by using the address information on the IP network stored in the second storage unit, including information indicating the reverse communication of the emergency report. Means for transferring an incoming call to the telephone terminal that made the emergency call through the IP network;
It is characterized by having.
[0021]
[Action]
According to the first aspect of the present invention, when the telephone terminal receives the input of the telephone number of the destination of the emergency call through the input operation unit, the telephone terminal reads out, for example, the location of the terminal itself. The call setting information including the emergency call setting information including the information indicating the user of the own terminal is transmitted through the IP network using the address information on the IP network stored in the first storage unit. The message is sent to an inter-network relay switching device having a function of performing a process for notification.
[0022]
The inter-network relay switching device that has received the call setting information stores the emergency call setting information included in the call setting information in the second storage unit. Then, a call is made to the destination of the emergency call through the public telephone network, a communication path is created between the destination of the emergency call and the telephone terminal that made the call, and the communication between the two is relayed. Do.
[0023]
If the communication path on the IP network between the inter-network relay switching device and the telephone terminal that has issued the emergency call is disconnected during the communication of the emergency call due to an overload or the like, The inter-exchange switching device converts the emergency call setting information stored in the second storage unit into voice by voice synthesis means, and sends the voice to the destination of the emergency call via the public telephone network.
[0024]
Therefore, according to the first aspect of the present invention, the information necessary for the emergency call is surely delivered to the destination of the emergency call.
[0025]
In the case of the second aspect of the invention, unlike the first aspect of the invention, the emergency call setting information from the telephone terminal does not include the emergency call setting information. Instead, the inter-network relay switching device stores, in the second storage unit, address information on the IP network of each of the telephone terminals connected to the IP network, the location of the telephone terminal, and the user of the telephone terminal. The information is stored in advance in association with emergency call setting information including information.
[0026]
If the communication path on the IP network between the inter-network relay switching device and the telephone terminal that has issued the emergency call is disconnected during the communication of the emergency call due to an overload or the like, The intermediary relay switching device uses the address information on the IP network of the telephone terminal that has issued the emergency call included in the call setting information and uses the emergency call setting information stored in the second storage unit. Is read out, converted into a voice signal by voice synthesis means, and sent to the destination of the emergency call through the public telephone network.
[0027]
Therefore, according to the second aspect of the present invention, the information necessary for the emergency call is surely delivered to the destination of the emergency call.
[0028]
According to the third aspect of the present invention, when the telephone terminal receives the input of the telephone number of the destination of the emergency call through the input operation unit, the information of the telephone number of the destination of the emergency call and the address of the terminal on the IP network The call setting information including the information is addressed to the inter-network relay switching device having a function of performing an emergency call process through the IP network using the address information on the IP network stored in the first storage unit. Send out.
[0029]
The inter-network relay switching device that has received the call setting information stores and holds the address information on the IP network of the telephone terminal that has issued the emergency call included in the call setting information in the second storage unit. Then, a call is made to the destination of the emergency call through the public telephone network, a communication path is created between the destination of the emergency call and the telephone terminal that made the call, and the communication between the two is relayed. Do.
[0030]
When the communication path through the IP network with the telephone terminal that has issued the emergency call is cut off, the inter-network relay switching device uses the reverse communication monitoring means to switch the public telephone network from the destination of the emergency call. To monitor for incoming reciprocal messages.
[0031]
When the reverse communication monitoring unit detects the reception of the reverse communication, the inter-network relay switching apparatus uses the address information on the IP network stored in the second storage unit to transmit information indicating the reverse communication of the emergency call. In addition, the reception of the reverse communication from the emergency report destination is transferred to the telephone terminal that has issued the emergency report via the IP network.
[0032]
Therefore, according to the third aspect of the present invention, even in the case of an emergency call, even if the communication path through the IP network between the inter-network relay switching device and the telephone terminal that has issued the emergency call is disconnected, the other party of the emergency call The reverse communication from the above is surely received by the telephone terminal that has issued the emergency call.
[0033]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an IP telephone system according to the present invention will be described with reference to the drawings.
[0034]
[First Embodiment]
As shown in FIG. 1, in the IP telephone system of this embodiment, one or a plurality of IP telephone terminals 1, a gateway device 2, and a gate keeper device 3 are connected to an IP network 4 such as the Internet. It is configured. Each of the IP telephone terminals 1, the gateway device 2, and the gate keeper device 3 is provided with address information on the IP network on the IP network in advance. The address information on the IP network includes a so-called IP address and a telephone number.
[0035]
The gateway device 2 is connected to a public telephone network 5 such as an analog telephone network or ISDN. As is well known, a communication command room 6 of a police station and a communication command room 7 of a fire department are connected to the public telephone network 5.
[0036]
In this example, the IP telephone terminal 1 has a configuration of a telephone terminal dedicated to an IP network, and has a computer function and a handset as described later.
[0037]
The gateway device 2 has a relay function for connecting the IP network 4 and the public telephone network 5, and performs mutual conversion between a continuous voice signal and an IP voice packet, as well as the IP phone terminal 1 and the gate keeper device 3 for the IP voice packet. Exchange between the telephone number and the IP address. The gateway device 2 is composed of, for example, a personal computer.
[0038]
The gateway device 2 is provided, for example, for each region. Although only one is shown in FIG. 1, a plurality of gateway devices 2 are actually connected to the IP network 4. The gateway device 2 of this embodiment has a function for an emergency call described later.
[0039]
The gate keeper device 3 is composed of, for example, a personal computer. The gatekeeper device 3 manages a plurality of telephone terminals 1 and gateway devices 2 registered as terminals in the IP network 4, allocates bandwidth, associates telephone numbers with IP addresses, and performs other operations. And a function of managing telephone communication with another IP telephone terminal 1.
[0040]
In addition, the gatekeeper device 3 also performs exchange management of telephone communication between the public telephone network 5 through the gateway device 2 and the plurality of IP telephone terminals 1 registered therein.
[0041]
In this embodiment, the gateway device 2 and the gatekeeper device 3 constitute an inter-network relay switching device. In the case where the other party is specified by directly using the IP address in the IP network 4 such as a call between the IP telephone terminals 1, the gate keeper device 3 can be omitted.
[0042]
[Example of hardware configuration of IP telephone terminal 1]
FIG. 2 shows an example of a hardware configuration of the IP telephone terminal 1 in the IP telephone system according to this embodiment. The IP telephone terminal 1 according to this embodiment includes a terminal body 100 and a handset 150. Although not shown, the handset 150 includes a microphone forming a transmitter, a transmitting amplifier, a speaker forming a receiver, and a receiving amplifier.
[0043]
The terminal body 100 is constituted by a computer, and sends a ROM 103, a RAM 104, an audio data input / output interface 105, a LAN interface 106, a transmission / reception buffer 107, a packet processing Unit 108, emergency call setting information memory 109, timer circuit 110, display controller 111, operation input interface (the interface is described as I / F in the figure; the same applies hereinafter) 113, and LED (Light Emitting Diode; (Light emitting diode) drive circuit 115 is connected.
[0044]
The display controller 111 is connected to a display 112 composed of, for example, an LCD (Liquid Crystal Display), and a display screen of the display 112 performs a display according to the control of the CPU 101.
[0045]
The operation input interface 113 is connected to an operation input unit 114 including numeric keys, cursor keys, and other operation keys. The CPU 101 recognizes which input key the user has operated on the operation input unit 114 via the operation input interface 113, and performs a process corresponding to the key input operation according to a program in the ROM 103 based on the recognition result. Execute.
[0046]
An LED group 116 is connected to the LED drive circuit 115, and lighting, blinking, and extinguishing of a predetermined LED is controlled according to a control instruction from the CPU 101. The LED group 116 includes an LED for display of a wait-for-reverse communication.
[0047]
The ROM 103 stores a program for executing a processing sequence at the time of outgoing and incoming calls as the IP telephone terminal, and a program for making an emergency call and receiving a reverse call. The RAM 104 is mainly used as a work area when the program of the ROM 103 is executed by the CPU 101.
[0048]
The LAN interface 106 has a function of taking in packetized data transmitted through the IP network 4, writing the packetized data in the transmission / reception buffer 107, and transmitting the packetized data in the transmission / reception buffer 107 to the IP network 4. The transmission / reception buffer 107 is for adjusting the transmission and reception timings of the packetized data.
[0049]
The packet processing unit 108 has a function of decomposing packetized data captured by the LAN interface 106 to obtain control data and audio data, and a function of generating control data and audio data to be transmitted and packetizing data to be transmitted. Have. The packet processing unit 108 includes a buffer memory for decomposing and generating packetized data.
[0050]
The packet disassembly processing function and the generation processing function of the packet processing unit 108 can be realized as software by the CPU 101 and the ROM 103.
[0051]
The audio data input / output interface 105 converts the audio data obtained by packet decomposition into an analog audio signal and supplies it to the handset 150, and converts the analog audio signal input from the handset 150 into a digital signal and captures it. Has functions.
[0052]
The emergency call setting information memory 109 stores information on emergency call setting items to be notified as a call originator of a call at the time of an emergency call in the communication command rooms 6 and 7 of a police station or a fire station as an emergency call destination. Have been. As examples of the setting items for emergency call, as shown in FIG. 3, the address of the gateway device 2 for emergency call, the address where the IP telephone terminal 1 is installed, the user (or owner) of the telephone terminal 1 ) Is stored in the memory 109.
[0053]
The address of the emergency notification gateway device 2 is address information of the gateway device 2 installed at a location closest to the address where the telephone terminal 1 is installed, and the address information is assigned to the gateway device 2. The given telephone number or IP address is used.
[0054]
[Example of hardware configuration of gateway device 2]
Next, FIG. 4 shows an example of a hardware configuration of the gateway device 2 in the IP telephone system of this embodiment. The gateway device 2 of this embodiment is configured by, for example, a personal computer, and sends a ROM 203, a RAM 204, a LAN interface 205, a transmission / reception buffer 206, a packet processing unit 207 to a CPU 201 via a system bus 202. , A line interface 208, a voice synthesis processing unit 209, an address conversion processing unit 210, and an emergency notification information memory 211.
[0055]
The ROM 203 stores processing programs executed by the gateway device 2, such as a processing program for converting telephone number information and an IP address, and a processing program for an emergency call.
[0056]
The RAM 204 is mainly used as a work area when the program of the ROM 203 is executed by the CPU 201.
[0057]
Further, the LAN interface 205 has a function of taking in packetized data transmitted through the IP network 4 and transmitting the packetized data to the IP network 4. The transmission / reception buffer 206 adjusts transmission and reception timings of the packetized data.
[0058]
The packet processing unit 207 has a function of decomposing a packet captured by the LAN interface 205 and generating packetized data to be transmitted. The packet processing unit 207 includes a buffer memory for decomposing / generating packetized data and temporarily storing the packetized data for transfer processing.
[0059]
The line interface 208 has functions such as capturing one or more telephone lines connected to the public telephone network 5 and detecting an incoming call.
[0060]
As will be described later, the voice synthesis processing unit 209 performs voice synthesis processing on the address and name of the emergency caller stored in the emergency call information memory 211, as needed, at the time of an emergency call, and generates a voice signal. It has a function to convert.
[0061]
The address conversion processing unit 210 stores information such as correspondence between the IP address of the telephone terminal and the telephone number, and determines the destination IP address of the packet using the information based on an instruction from the CPU 201. Or determine the IP address of the destination.
[0062]
When an emergency call is issued from the IP telephone terminal 1, information such as an address, a name, and a telephone number included in the call setting information is stored in the emergency call information memory 211. As will be described later, when the communication path through the IP network 4 between the gateway device 2 and the IP telephone terminal 1 that has issued the emergency call is disconnected at the time of the emergency call, the CPU 201 stores the data in the memory 211. The stored information is read out, voice-synthesized by the voice synthesis processing unit 209, and sent to the emergency notification destination.
[0063]
[Emergency call operation]
[Operation of IP telephone terminal]
FIGS. 5 and 6 are flowcharts of the operation when an emergency call is made from the IP telephone terminal 1 using a special number “110” or “119”. 5 and FIG. 6 are executed by the CPU 101 of the IP telephone terminal 1 according to the program in the ROM 103.
[0064]
First, the CPU 101 determines whether or not a calling process has been performed by an operation through the operation input unit 114 (step S1). When it is determined that the calling process has not been performed, other processes are performed (step S2).
[0065]
When it is determined in step S1 that the calling process has been performed, the CPU 101 determines whether or not the call is a special number call for an emergency call due to the input of the telephone number “110” or “119” using the numeric keypad. Is determined (step S3). When it is determined that the call is not a special number call, the CPU 101 executes a normal call routine (step S4). The description of the processing of the normal calling routine is omitted in this specification.
[0066]
When it is determined in step S3 that the call is a special number call, the CPU 101 sets the address of the emergency call gateway device 2 stored in the emergency call setting information memory 109 and its own terminal as an example of the emergency call setting information. The address, the name of the user of the own device, and the telephone number are read out, call setting information is generated, and the call setting information is sent to the emergency call gateway 2 through the IP network 4 (step S5).
[0067]
The call setting information includes an emergency call destination telephone number consisting of "110" or "119", an address of the gateway device 2, an address of the own terminal, and an emergency call gateway device as an example of the emergency call setting information. 2 and the address where the own terminal is installed, the name of the user of the own device, and the telephone number. An IP address is used as the address of the gateway device 2, and either a telephone number or an IP address is used as the address of the terminal itself.
[0068]
If the IP address of the emergency call gateway device 2 is unknown, the gateway device 3 is inquired of the emergency call destinations of “110” and “119”, and the call setting information is sent to the gateway device 2. If the IP address of the emergency notification gateway device 2 is known, it is sent to the gateway device 2 without passing through the gatekeeper device 3.
[0069]
Upon receiving the call setting information of the emergency call, the gateway device 2 makes a call to the communication command room 6 or 7 of the police station or fire department as the emergency call destination through the public telephone network 5 as described later. When command room 6 or 7 responds, the response is transferred to the IP telephone terminal.
[0070]
Therefore, the IP telephone terminal 1 waits for a response from the communication command room 6 or 7 of the special number partner (step S6), and if there is a response, makes a voice call with the communication command room 6 or 7. Here, the transmission of the call voice in step S7 is performed by a voice packet between the IP telephone terminal 1 and the gateway device 2, and is performed by an analog voice between the gateway device 2 and the communication command room 6 or 7. Will be.
[0071]
Next, the CPU 101 determines whether the on-hook operation of the handset 150 has been performed for the emergency call (step S8). If it is determined that the end operation has been performed, the IP with the emergency call gateway is determined. The communication path through the network 4 is disconnected (step S10).
[0072]
Then, the CPU 101 sets the timer circuit 110 and starts a reverse communication waiting timer for setting a time for waiting for reverse communication from the communication command room 6 or 7 (step S11). Then, the CPU 101 displays on the screen of the display 112 that the IP telephone terminal 1 is in a state of waiting for a reverse communication, and controls the LED drive circuit 115 to blink or light an LED for a wait for a reverse communication. Then, the waiting for the back-up communication is displayed (step S12).
[0073]
In step S8, it is detected that the communication path through the IP network 4 with the gateway device 2 for emergency notification has been disconnected due to, for example, an overload in the IP network 4 without discriminating the call termination operation. In some cases (step S9), the CPU 101 proceeds to step S11 to start a counter-waiting timer, and displays a counter-waiting display in the next step S12.
[0074]
When detecting the reverse communication from the communication command room 6 or 7, the gateway device 2 transfers the reception of the reverse communication to the IP telephone terminal 1 that has issued the emergency call. At this time, the reception of the reverse communication to the IP telephone terminal 1 includes information indicating the reverse communication. In this example, as the information indicating the reverse communication, the calling ID from the gateway device 2 is used. As the calling ID indicating the reverse communication in this case, specific number information set in advance, for example, “110” or “119” used at the time of calling is used.
[0075]
In the state of waiting for reverse communication, the CPU 101 of the IP telephone terminal 1 first determines whether or not an incoming call has been received (step S21). When it is determined that no incoming call has been received, it is determined whether or not an outgoing call operation by an off-hook operation has been performed (step S22). The user is notified that it is not possible (step S23). At this time, the user can recognize the waiting for the reverse communication by looking at the display on the display 112 for waiting for the reverse communication and the display of the standby for the reverse communication by the LED.
[0076]
If it is determined in step S22 that the transmission operation has not been performed, the CPU 101 checks the timer circuit 110 to determine whether a predetermined time has elapsed since the start of the reverse communication timer (step S24). If it is determined that the predetermined time has not elapsed, the process returns to step S21 and waits for an incoming call. If it is determined that the predetermined time has elapsed, the CPU 101 ends this processing routine.
[0077]
When an incoming call is detected in step S21, the CPU 101 checks the calling ID included in the information at the time of the incoming call (step S25), and determines whether or not the calling ID indicates reverse communication (step S26). ). When it is determined that the message does not indicate reverse communication, the CPU 101 disconnects the communication channel without accepting the incoming call (step S27). Then, the process returns to step S21 to wait for an incoming call.
[0078]
Then, when it is determined in step S26 that the incoming call is a reverse communication, the CPU 101 causes the IP telephone terminal 1 to sound a ringtone (step S28). Then, it waits for a response from the user to the ringing of the incoming call (step S29). Then, when it is detected that the user has turned off the handset and responded, the response information is sent to the gateway device 2 (step S30).
[0079]
As a result, a communication path is formed between the communication command room that has made the reverse communication and the IP telephone terminal 1 that has made the emergency call, and a call can be made.
[0080]
Then, the CPU 101 determines whether or not the on-hook end operation has been performed (step S32). If it is determined that the on-hook operation has been performed, the CPU 101 disconnects the communication path and ends the processing routine.
[0081]
[Operation of Gateway Device 2]
FIGS. 7 to 10 are flowcharts showing the operation of the gateway device 2 when the above-mentioned emergency call is made from the IP telephone terminal 1. 7 to 10 are executed by the CPU 201 of the gateway device 2 according to the program in the ROM 203.
[0082]
First, the CPU 201 determines whether or not call setting information has been received from the IP telephone terminal 1 (step S31). When it is determined that the call setting information has not been received, other processing is performed (step S32).
[0083]
When it is determined in step S31 that the call setting information has been received, the CPU 201 checks the telephone number of the call destination included in the call setting information (step S33), and determines that the telephone number of the call destination is the emergency call destination. Is determined (step S34). When determining that it is not a special number, the CPU 201 executes a normal transmission processing routine (step S35). In this specification, description of the normal transmission processing routine will be omitted.
[0084]
If it is determined in step S34 that the call destination is a special number, the CPU 201 sends an emergency call to the IP telephone terminal address and information such as the address, name, and telephone number included in the call setting information from the IP telephone terminal 1. It is stored in the use information memory 211 (step S36). Then, it is determined whether the emergency call destination public line is an analog line or an ISDN line (step S37).
[0085]
If it is determined in step S37 that the line is an ISDN line, the CPU 201 selects an idle ISDN line (step S38), adds a predetermined subaddress predetermined as a caller number, and communicates with the emergency call destination. A call is made to the command room 6 or 7 (step S39). At this time, the emergency call setting information stored in the memory 211 as the user information, in this example, the address where the calling IP telephone terminal 1 is installed, the name of the user of the IP telephone terminal 1, You may make it transmit a telephone number etc. to a communication command room.
[0086]
Then, the CPU 201 waits for a response from the communication command room 6 or 7 (step S40), and upon detecting the response, the CPU 201 notifies the IP telephone terminal 1 that has issued the emergency call of the other party's response (step S41). ). As a result, a communication path between the communication command room 6 or 7 and the IP telephone terminal 1 that has issued the emergency call through the IP network 4 and the public telephone network 5 using the gateway device 2 as a relay device. The call is formed and a call is possible (step S42).
[0087]
Next, CPU 201 determines whether or not a release completion message based on the on-hook operation in IP telephone terminal 1 has been received (step S51), and when it is determined that the release completion message has not been received, an emergency call is made with gateway device 2. It is determined whether the connection with the IP telephone device 1 has been disconnected due to an overload of the IP network 4 or the like (step S52). When it is determined that the connection between the gateway device 2 and the IP telephone device 1 that has issued the emergency call is not disconnected, the process returns to step S51.
[0088]
When it is determined in step S52 that the connection between the gateway device 2 and the IP telephone device 1 that has issued the emergency call has been disconnected, the CPU 201 determines whether or not the emergency call such as the address, name, and telephone number stored in the memory 211 has been made. The information of the setting information item is read and passed to the voice synthesis processing unit 209 to be converted into a voice signal. Then, the voice signal of the emergency notification setting information item synthesized by voice is sent to the communication command room 6 or 7 through the public telephone network 5 (step S53). Then, the CPU 201 disconnects the communication path with the communication command room 6 or 7 (step S55).
[0089]
When it is determined in step S51 that the on-hook operation has been performed on the IP telephone terminal 1, the CPU 201 disconnects the communication path through the IP network 4 with the IP telephone terminal 1 (step S54). Alternatively, the communication path with 7 is disconnected (step S55).
[0090]
Then, it waits for the reception of the reverse communication from the communication command room 6 or 7 (step S56). Then, in step S56, when detecting that there is an incoming call through the public telephone network 5, the CPU 201 checks the incoming call destination information included in the call setting information, and the information is added by the gateway device 2 when the emergency call is made. It is determined whether or not the sub address is included as destination information (step S58).
[0091]
When the sub address is not detected in step S58, the CPU 201 executes a normal incoming call processing routine (step S59). The description of this normal incoming call processing routine is omitted.
[0092]
If it is determined in step S58 that the sub-address has been detected, the sub-address including the calling ID for the reverse communication described above is transmitted to the IP telephone terminal 1 that has transmitted the emergency call stored in the memory 211. The incoming call is transferred (step S60). Then, after waiting for the response information from the IP telephone terminal 1 (step S61), and confirming the reception of the response information, the CPU 201 transmits the response of the IP telephone terminal 1 to the communication command room 6 or 7 to which the reverse communication has been sent. Notify (step S62).
[0093]
Accordingly, the communication command room 6 or 7 and the IP telephone terminal 1 are thereby reconnected, and a call is made (step S63).
[0094]
Thereafter, the CPU 201 monitors the end of the call due to the on-hook operation in the IP telephone terminal 1 (step S64). When the end is detected, the CPU 201 communicates with the IP telephone terminal 1 through the communication path through the IP network and through the public telephone network. The communication path to the communication command room is disconnected, the public line is opened, and the process is terminated (step S65).
[0095]
When it is determined in step S37 that the public line is an analog line, the CPU 201 captures a vacant analog line (step S71) and makes a call to the communication command room 6 or 7 of the emergency call destination (step S71). Step S72).
[0096]
Then, the CPU 201 waits for a response from the communication command room 6 or 7 (step S73), and upon detecting the response, the CPU 201 notifies the IP telephone terminal 1 that has issued the emergency call of the other party's response (step S74). ). As a result, a communication path between the communication command room 6 or 7 and the IP telephone terminal 1 that has issued the emergency call through the IP network 4 and the public telephone network 5 using the gateway device 2 as a relay device. The call is formed and a call can be made (step S75).
[0097]
Next, CPU 201 determines whether or not a release completion message based on the on-hook operation in IP telephone terminal 1 has been received (step S76), and when it is determined that the release completion message has not been received, an emergency call is made with gateway device 2. It is determined whether the connection with the IP telephone device 1 has been disconnected due to an overload of the IP network 4 or the like (step S77). If it is determined that the connection between the gateway device 2 and the IP telephone device 1 that has issued the emergency call is not disconnected, the process returns to step S76.
[0098]
When it is determined in step S77 that the connection between the gateway device 2 and the IP telephone device 1 that has issued the emergency call has been disconnected, the CPU 201 determines whether the emergency call, such as the address, name, and telephone number, stored in the memory 211 has been completed. The information of the setting information item is read and passed to the voice synthesis processing unit 209 to be converted into a voice signal. Then, the voice signal of the emergency notification setting information item synthesized by voice is sent to the communication command room 6 or 7 through the public telephone network 5 (step S78). Then, the CPU 201 disconnects the communication path with the communication command room 6 or 7 (step S80).
[0099]
If it is determined in step S76 that the on-hook operation has been performed on the IP telephone terminal 1, the CPU 201 disconnects the communication path through the IP network 4 with the IP telephone terminal 1 (step S79). Alternatively, the communication path with 7 is disconnected (step S80).
[0100]
Then, the CPU 201 waits for an incoming call from the communication command room 6 or 7 via the public telephone network 5 (step S81). It is determined whether or not the incoming call is to the released line (step S82).
[0101]
If it is determined in step S82 that the incoming call has not been received on the once released line used for the emergency call, the CPU 201 executes a normal incoming call processing routine (step S83). The description of this normal incoming call processing routine is omitted.
[0102]
If it is determined in step S82 that the incoming call is to the once released line used for the emergency call, the emergency call stored in the memory 211 including the calling ID for the reverse communication described above is performed. The incoming reverse call is transferred to the IP telephone terminal 1 (step S84). Then, after waiting for the response information from the IP telephone terminal 1 (step S85), and confirming the reception of the response information, the CPU 201 transmits the response of the IP telephone terminal 1 to the communication command room 6 or 7 to which the inverse communication has been sent. Notify (step S86).
[0103]
Accordingly, communication command room 6 or 7 and IP telephone terminal 1 are thus reconnected, and a call is made (step S87).
[0104]
Thereafter, the CPU 201 monitors the end of the call due to the on-hook operation in the IP telephone terminal 1 (step S88). When the end is detected, the CPU 201 communicates with the IP telephone terminal 1 through the communication path through the IP network and through the public telephone network. The communication path to the communication command room is disconnected, the public line is opened, and the process is terminated (step S89).
[0105]
As described above, according to this embodiment, an emergency call can be made through the IP network by inputting the numbers "110" and "119" from the telephone terminal connected to the IP network.
[0106]
In this case, even if the communication path in the IP network is disconnected due to an overload or the like during the emergency call between the communication command room and the telephone terminal, the emergency call is issued. Items necessary for an emergency call, such as the address where the telephone terminal making the call is located, the name of the user (owner), and the telephone number, are read out of the memory by the gateway device 2 and voiced by voice synthesis. Is sent to the communication command room without fail.
[0107]
Further, as described above, the interposition of the gateway device can surely perform the reverse communication to the telephone terminal that has issued the emergency call from the communication command room. In this case, there is an advantage that the hardware configuration of the communication command room does not need to be changed.
[0108]
In addition, when the gateway device 2 calls the communication command room, which is the destination of the emergency call, if the public line to be used is an ISDN line, a telephone terminal is installed as user / user information. Since emergency setting information such as the address, the name of the user (owner), and the telephone number can be sent to the communication control room, equipment in the communication control room can acquire and use the user / user information. If so, transmission of the emergency call setting information by voice synthesis may be omitted in some cases.
[0109]
[Second embodiment]
In the first embodiment described above, when an emergency call is issued from the IP telephone terminal 1, the call setting information is transmitted including the emergency call setting information such as the address, name, and telephone number. . On the other hand, in the second embodiment, instead of sending emergency call setting information such as an address, a name, and a telephone number from a telephone terminal, the gateway device 2 transmits the information in advance to each IP telephone. Registered in the memory corresponding to the address of the terminal 1, if the communication path in the IP network 4 is disconnected during the emergency call, the information stored in the memory is stored in the same manner as described above. , And send it to the destination of the emergency call.
[0110]
That is, in the case of the second embodiment, the system configuration is the same as that shown in FIG. 1, but the following points are different from the first embodiment.
[0111]
In the case of the second embodiment, when the telephone terminal 1 is connected to the IP network 4, the address, the name of the user or the owner, the telephone number, etc., of the telephone terminal 1 are set. The emergency call setting information is registered in the gateway device 2. The gateway device 2 stores the registered emergency call setting information in the emergency call memory in association with the address (telephone number or IP address) assigned to each telephone terminal 1.
[0112]
Then, when receiving the call setting information of the emergency call from the telephone terminal, the gateway device 2 stores the address of the caller telephone terminal included in the call setting information. When the communication path in the IP network is disconnected during the emergency call, the gateway device 2 relies on the telephone address stored in the emergency call memory depending on the stored address. Emergency call setting information such as an address, a name, and a telephone number is retrieved and read, converted into voice information by the voice synthesis processing unit 209, and sent to the communication command room of the report destination. Other configurations and operations are the same as those in the first embodiment.
[0113]
Therefore, in the second embodiment, similarly to the above-described first embodiment, during the emergency call between the communication command room and the telephone terminal, the IP network is not connected due to overload or the like. Even if the communication path in is cut off, the items required for emergency calls, such as the address where the telephone terminal that made the emergency call was placed, the name of the user (owner), and the telephone number, are Is read out from the memory by the gateway device 2 and sent to the communication command room as sound by voice synthesis without fail.
[0114]
Further, as in the first embodiment, it is possible to reliably perform back-to-back communication with respect to the telephone terminal that has issued the emergency call from the communication command room.
[0115]
Also in the case of the second embodiment, when the gateway device 2 makes a call to the communication command room which is the destination of the emergency call, if the public line to be used is the ISDN line, the emergency call is made. The information of items necessary for an emergency call, such as the address where the telephone terminal that made the call is installed, the name of the user (owner), the telephone number, etc., is read from the memory depending on the address, and It can be sent to the communication command room as user information.
[0116]
[Modification]
Note that, instead of the IP telephone terminal 1, an analog telephone terminal may be connected via an adapter for an IP network. In that case, the configuration of the telephone terminal according to the present invention is a combination of an adapter for an IP network and an analog telephone terminal. In this case, in the case of the first embodiment, the IP network adapter has an emergency call setting information memory, and includes the emergency information setting information read from the memory in the call setting information. Is provided. In addition, the function for waiting for back communication is also provided in the adapter for the IP network.
[0117]
It should be noted that the emergency call setting information shown in FIG. 3 is an example, and the telephone number information may be omitted. Further, other information may be added to these pieces of information.
[0118]
【The invention's effect】
As described above, according to the present invention, when an emergency call is made through the IP network, during the emergency call between the emergency call destination and the telephone terminal, the IP network Even if the communication path in is cut off, the emergency call setting information such as the address where the telephone terminal making the emergency call is installed, the name of the user (owner), the telephone number, etc. In the inter-network relay switching device, the data is read from the memory and sent to the destination of the emergency call as voice by voice synthesis without fail.
[0119]
Also, the interposition of the inter-network relay switching device can reliably perform back-to-back communication with the telephone terminal that has issued the emergency call from the emergency call destination. In this case, there is an advantage that the hardware configuration at the emergency call destination does not need to be changed.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an outline of an entire IP telephone system according to an embodiment;
FIG. 2 is a block diagram illustrating a configuration example of an embodiment of an IP telephone terminal;
FIG. 3 is a diagram showing an example of contents stored in an emergency call setting information memory;
FIG. 4 is a block diagram showing a configuration example of a gateway device constituting the inter-network relay switching device.
FIG. 5 is a diagram showing a part of a flowchart for explaining an operation at the time of an emergency call in the IP telephone terminal of the embodiment.
FIG. 6 is a diagram showing a part of a flowchart for explaining an operation at the time of an emergency call in the IP telephone terminal of the embodiment.
FIG. 7 is a diagram showing a part of a flowchart for explaining an operation at the time of an emergency call in the inter-network relay switching apparatus of the embodiment.
FIG. 8 is a diagram showing a part of a flowchart for explaining an operation at the time of an emergency call in the inter-network relay switching apparatus of the embodiment.
FIG. 9 is a diagram showing a part of a flowchart for explaining an operation at the time of an emergency call in the inter-network relay switching apparatus of the embodiment.
FIG. 10 is a diagram showing a part of a flowchart for explaining an operation at the time of an emergency call in the inter-network relay switching apparatus of the embodiment.
[Explanation of symbols]
1 IP telephone terminal
2 Gateway device
3 Gatekeeper device
4 IP network
5 Public telephone network
6,7 Communication command room for emergency calls

Claims (12)

One or more telephone terminals connected to an IP (Internet Protocol) network for transmitting and receiving voice information as packetized data through the IP network;
Connected to the IP network and connected to a public telephone network to perform relay exchange processing of transmission / reception information between the IP network and the public telephone network; An inter-network relay switching device having a function of performing a relay process for an emergency call to a caller,
With
The telephone terminal,
A first storage unit that stores address information on the IP network of the inter-network relay switching device having a function of performing the process for the emergency call, and a setting information for the emergency call;
An input operation unit for receiving an input of a number of a call destination;
When receiving the telephone number of the destination of the emergency call through the input operation unit, the information including the telephone number of the destination of the emergency call and the emergency call setting information read from the first storage unit are included. Means for transmitting the call setting information to the inter-network relay switching device through the IP network using the address information in the first storage unit;
With
The inter-network relay switching device,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, the emergency call setting information included in the call setting information is stored. A second storage unit;
Voice synthesis means,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
During communication with the destination of the emergency call through the public telephone network, when a communication path between the telephone terminal through the IP network is interrupted, the emergency call stored in the second storage unit is disconnected. Means for converting the setting information into voice information by the voice synthesis means, and transmitting the voice information to the destination of the emergency call;
An IP telephone system comprising: One or more telephone terminals connected to an IP (Internet Protocol) network for transmitting and receiving voice information as packetized data through the IP network;
Connected to the IP network and connected to a public telephone network to perform relay exchange processing of transmission / reception information between the IP network and the public telephone network; An inter-network relay switching device having a function of performing a relay process for an emergency call to a caller,
With
The telephone terminal,
A first storage unit that stores at least address information on the IP network of the inter-network relay switching apparatus that has a function of performing the processing for the emergency call;
An input operation unit for receiving an input of a number of a call destination;
When receiving the telephone number input of the destination of the emergency call through the input operation unit, the call setting information including the information of the telephone number of the destination of the emergency call and the address information of the own terminal on the IP network, Means for sending to the inter-network relay switching device through the IP network using the address information in the storage unit of (1);
With
The inter-network relay switching device,
A second storage unit that stores in advance address information on the IP network of each of the telephone terminals connected to the IP network, and emergency call setting information in association with each other;
A third storage unit that stores address information on the IP network of the telephone terminal when receiving call setting information from the telephone terminal;
Voice synthesis means,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
When the communication path with the telephone terminal through the IP network is interrupted during communication with the destination of the emergency call through the public telephone network, the telephone stored in the third storage unit Using the address information of the terminal on the IP network, read out the emergency call setting information stored in the second storage unit, convert the information into voice information by the voice synthesis means, and Means to send to
An IP telephone system comprising: One or more telephone terminals connected to an IP (Internet Protocol) network for transmitting and receiving voice information as packetized data through the IP network;
Connected to the IP network and connected to a public telephone network to perform relay exchange processing of transmission / reception information between the IP network and the public telephone network; An inter-network relay exchange device having a function of performing a process for an emergency call to the other party of the call,
With
The telephone terminal,
A first storage unit that stores at least address information on the IP network of the inter-network relay switching apparatus that has a function of performing the processing for the emergency call;
An input operation unit for receiving an input of a number of a call destination;
When receiving the telephone number input of the destination of the emergency call through the input operation unit, the call setting information including the information of the telephone number of the destination of the emergency call and the address information of the own terminal on the IP network, Means for using the address information on the IP network in the first storage unit to send the address to the inter-network relay switching device via the IP network;
Control means for controlling so as to be able to respond only to an incoming call including information indicating the return of a predetermined emergency call after a communication path through the IP network with the inter-network relay switching device is disconnected. When,
With
The inter-network relay switching device,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, an address on the IP network of the telephone terminal included in the call setting information A second storage unit for storing information;
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
Reverse communication for monitoring the reception of reverse communication from the other party of the emergency call through the public telephone network when the communication path through the IP network with the telephone terminal that has issued the emergency call is disconnected. Monitoring means;
When the reverse monitoring means detects the reception of the reverse communication, the reverse communication is performed by using the address information on the IP network stored in the second storage unit, including information indicating the reverse communication of the emergency report. Means for transferring an incoming call to the telephone terminal that made the emergency call through the IP network;
An IP telephone system comprising: The IP telephone system according to claim 3,
The inter-network relay switching device, when the public telephone network is an ISDN line, sends a predetermined number as a caller number when calling the destination of the emergency call,
The inverse communication monitoring means is an inverse communication from the destination of the emergency call depending on whether or not the information at the time of the incoming call from the destination of the emergency call includes a predetermined number as the caller number. An IP telephone system characterized in that it is determined whether or not it is. A telephone terminal connected to an IP (Internet Protocol) network for transmitting and receiving voice information as packetized data through the IP network,
A storage unit for storing address information on an IP network of an inter-network relay switching device having a function of performing an emergency call process, and emergency call setting information;
An input operation unit for receiving an input of a number of a call destination;
Call setting information including the telephone number information of the destination of the emergency call and the emergency call setting information read from the storage unit when receiving the telephone number input of the destination of the emergency call through the input operation unit Means for using the address information on the IP network in the storage unit to send the address to the inter-network relay switching device through the IP network;
A telephone terminal comprising: A telephone terminal connected to an IP (Internet Protocol) network for transmitting and receiving voice information as packetized data through the IP network,
A storage unit for storing at least address information on the IP network of the inter-network relay switching device having a function of performing processing for an emergency call;
An input operation unit for receiving an input of a number of a call destination;
When receiving the telephone number input of the destination of the emergency call through the input operation unit, the storage unit stores the call setting information including the telephone number information of the destination of the emergency call and the address of the own terminal on the IP network. Means for sending to the inter-network relay switching device through the IP network using the address information on the IP network,
After the communication path through the IP network with the inter-network relay switching device is disconnected, it is possible to respond only to an incoming call including information indicating the return of a predetermined emergency call from the inter-network relay switching device. Control means for controlling so that
A telephone terminal comprising: The telephone terminal according to claim 6,
The telephone terminal according to claim 1, wherein said control means includes means for notifying a user of waiting for counter-transmission of said emergency call. The telephone terminal according to claim 6,
A telephone terminal for transmitting a busy tone to a handset to notify that the call cannot be made when the user performs a call operation while waiting for the back-up of the emergency call; . It is connected to an IP (Internet Protocol) network and connected to a public telephone network, and performs relay exchange processing of transmission / reception information between the IP network and the public telephone network, and is connected to the public telephone network. An inter-network relay exchange device having a function of performing a relay process for an emergency call to a partner of the emergency call to be performed,
The telephone number of the call destination included in the call setting information from the telephone terminal connected to the IP network and transmitting and receiving voice information as packetized data through the IP network is the telephone number of the destination of the emergency call. When, a storage unit for storing emergency call setting information included in the call setting information,
Voice synthesis means,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
During communication with the destination of the emergency call through the public telephone network, when a communication path between the telephone terminal through the IP network is interrupted, the emergency call setting information stored in the storage unit is Means for converting to voice information by the voice synthesis means, and transmitting to the destination of the emergency call,
An inter-network relay switching device comprising: It is connected to an IP (Internet Protocol) network and connected to a public telephone network, and performs relay exchange processing of transmission / reception information between the IP network and the public telephone network, and is connected to the public telephone network. An inter-network relay exchange device having a function of performing a relay process for an emergency call to a partner of the emergency call to be performed,
A first memory which is connected to the IP network and associates address information on the IP network of each of one or a plurality of telephone terminals which transmits and receives voice information as packetized data through the IP network with setting information for emergency call, and stores the first. A storage unit,
A second storage unit that stores address information on the IP network of the telephone terminal when receiving call setting information from the telephone terminal;
Voice synthesis means,
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
When the communication path with the telephone terminal through the IP network is interrupted during communication with the destination of the emergency call through the public telephone network, the telephone stored in the second storage unit Using the address information on the IP network of the terminal, read out the emergency call setting information stored in the first storage unit, convert the information into voice information by the voice synthesis unit, and Means to send to
An inter-network relay switching device comprising: It is connected to an IP (Internet Protocol) network and connected to a public telephone network, and performs relay exchange processing of transmission / reception information between the IP network and the public telephone network, and is connected to the public telephone network. An inter-network relay exchange device having a function of performing a relay process for an emergency call to a partner of the emergency call to be performed,
The telephone number of the call destination included in the call setting information from the telephone terminal connected to the IP network and transmitting and receiving voice information as packetized data through the IP network is the telephone number of the destination of the emergency call. A storage unit for storing address information of the telephone terminal on the IP network included in the call setting information;
When the destination telephone number of the call included in the call setting information from the telephone terminal is the destination telephone number of the emergency call, a call is made to the destination of the emergency call through the public telephone network. Means to relay communication between the destination of the emergency call and the telephone terminal,
Reverse communication for monitoring the reception of reverse communication from the other party of the emergency call through the public telephone network when the communication path through the IP network with the telephone terminal that has issued the emergency call is disconnected. Monitoring means;
When the reverse reception monitoring means detects the reception of the reverse reception, the reception of the reverse reception is performed by using the address information on the IP network stored in the storage unit and including information indicating the reverse transmission of the emergency call. Means for transferring the emergency call to the telephone terminal that has made the call via the IP network;
An inter-network relay switching device comprising: The inter-network relay switching device according to claim 11,
When the public telephone network is an ISDN line, a predetermined number is sent as a caller number when calling the destination of the emergency call,
The inverse communication monitoring means is an inverse communication from the destination of the emergency call depending on whether or not the information at the time of the incoming call from the destination of the emergency call includes a predetermined number as the caller number. An inter-network relay switching device for determining whether or not the switching is performed.

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