JP4402344B2 - Button telephone system, button telephone apparatus and program - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a key telephone system, and more particularly to a key telephone system in which a plurality of key telephone devices are connected via a data communication network.
[0002]
[Prior art]
Conventionally, a key telephone system configured by connecting a plurality of key telephone devices has been proposed (see, for example, Patent Document 1). FIG. 11 shows a configuration example of a conventional button telephone system, in which a master button telephone apparatus 81 and a slave button telephone apparatus 85 are connected via a signal line 89. The master button telephone device 81 is connected to lines 91 and 92 and accommodates a plurality of telephones 84, and the slave button telephone device 85 controlled by the master button telephone device 81 is connected to a line 93. And a plurality of telephones 88 are accommodated.
[0003]
The master button telephone device 81 is provided with a line switching switch 83 between the lines 91 and 92 and the control unit 82, and the slave telephone device 85 is provided between the line 93 and the control unit 86. A line switching switch 87 is provided. These switches 83 and 87 are connected to each other by lines 94 to 96, and by switching the switches 83 and 87, the lines 91 to 93 can be used by any of the button telephone devices 81 and 85. It has become.
[0004]
When a call operation on the telephone 88 is notified from the control unit 86 via the signal line 89, the control unit 82 confirms the availability of the lines 91 and 92, and when the line 92 is available, the switch 83 of the line 92 is used. Is switched to the switch 87 side, and the switch 87 is switched via the signal line 89 to notify that the line 95 and the telephone set 88 are connected.
Thereby, a call using the line 92 is realized from the telephone 88.
[0005]
The applicant has not yet found prior art documents related to the present invention by the time of filing other than the prior art documents specified by the prior art document information described in this specification.
[Patent Document 1]
JP-A-7-322314
[0006]
[Problems to be solved by the invention]
However, in such a conventional key telephone system, it is possible to check an empty line among lines connected to the master button telephone device and the slave button telephone device and use the empty line in response to a call operation on the telephone. Thus, there is a problem that it is impossible to designate a line of another button telephone device intended by the user at the time of a call operation.
In such a button telephone system, each button telephone device is located at a remote location, and these devices are connected via a data communication network whose calling cost is lower than that of the public telephone network, and from any button telephone device to another button phone. When making a call to a remote party near the device location, use a line connected to another button telephone device by connecting the key phone devices using a communication path formed via a data communication network. Thus, call costs can be reduced.
[0007]
Therefore, in order to realize such a call, it is necessary to designate a line of another button telephone device at the time of the call operation. In the conventional button telephone system, the line of the other button telephone device at the time of the call operation. There is no function to specify, and the free line is automatically selected from each line connected to each button telephone device. There is also a possibility that the line of the button telephone apparatus arranged in a different remote place may be selected, and the call cost may increase.
The present invention is to solve such a problem, and among the lines accommodated in each button telephone apparatus, a desired line of another button telephone apparatus can be easily set according to a user's call operation. It is intended to provide a key telephone system, a key telephone device and a program that can be specified.
[0008]
[Means for Solving the Problems]
In order to achieve such an object, a button telephone system according to the present invention includes one or more telephones and a main apparatus for connecting a line from the telephone network, accommodating the telephone and exchanging and connecting the telephone to the line. It consists of a plurality of button telephone devices, each of which has the main device of these button telephone devices to perform call control by exchanging control data via a data communication network and to form a communication path by exchanging voice data. , A button telephone system for realizing a call using a line of another button telephone device by using the communication path, the main device of the button telephone device being a telephone Outside line button Storage means for storing line management information indicating correspondence between lines and lines of other button telephone devices; Outside line button Depending on the operation, the line management information in the storage Outside line button And a control means for requesting a call using the line to another button telephone apparatus connected to the line via the data communication network.
[0011]
With these line management information, Outside line button On the other hand, a plurality of lines of other key telephones that are line candidates used for the call may be associated, or Outside line button The call operation set in the line management information of another button telephone device may be associated with the call operation.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a button telephone system according to a first embodiment of the present invention.
This key telephone system is composed of a plurality of key telephone devices 10A, 10B to 10N. Each of these button telephone devices 10A to 10N connects one or more telephones such as a key telephone 2 or an IP telephone terminal 3 to a line from a telephone network 51 such as a public telephone network or an ISDN network, It has a main apparatus 1 that accommodates an IP telephone terminal 3 and exchanges and connects these telephones to the line.
[0013]
The main devices 1 of the key telephone devices 10A to 10N are connected to each other via a data communication network 52 formed of an IP network such as the Internet, and exchange control data via the data communication network 52. The call control is performed by using voice packet technology such as VoIP (Voice over IP) by exchanging voice data, and the line of another button telephone device is used by using the call. Make a call.
[0014]
FIG. 2 shows a configuration example of the button telephone apparatus. The main apparatus 1 is connected to the telephone network 51 via the telephone line 53 and is connected to the data communication network 52 via the communication line 54. The key telephone 2 is accommodated via the extension transmission path 20 and the IP telephone terminal 3 is accommodated via the data communication path 30 such as a LAN.
The main device 1 includes a telephone network connection unit 11, a data communication network connection unit 12, an IP telephone terminal connection unit 13, a key telephone connection unit 14, a switch 15, a data / voice conversion unit 16, a control unit 17, and a storage unit 18. Is provided.
[0015]
The telephone network connection unit 11 is a circuit unit that controls termination of the telephone line 53 from the telephone network 51. The data communication network connection unit 12 is a circuit unit that controls termination of the communication line 54 from the data communication network 52. The IP telephone terminal connection unit 13 is a circuit unit that connects the IP telephone terminal 3 via the data communication path 30. The key telephone connection unit 14 is a circuit unit that connects the key telephone 2 via the extension transmission line 20. The switch 15 is a circuit unit that exchanges and connects the paths of the telephone network connection unit 11, the key telephone connection unit 14, and the data / voice conversion unit 16. The data / voice conversion unit 16 is a circuit unit that mutually converts voice packets on the data communication network connection unit 12 side and voice data on the switch 15 side.
[0016]
The control unit 17 has a computer (hardware resource) including a microprocessor such as a CPU and its peripheral circuits, and is a functional unit that controls each unit of the main device 1 by executing a predetermined program. The storage unit 18 is a circuit for storing various data used for control by the control unit 17 in addition to the line management information 18A indicating the correspondence between the call operation on the key telephone 2 and the IP telephone terminal 3 and the line used for the call. Part. The control unit 17 is provided with call control means 17A for performing calling processing and incoming call processing for the key telephone 2 and the IP telephone terminal 3 as functional means. This functional means is realized by cooperating the hardware resource and the program.
[0017]
The recording medium 19 is a recording medium such as a CD-ROM or a flexible disk, and stores a program for realizing various processes in the control unit 17 including the call control means 17A.
The program recorded in the recording medium 19 is read by the main device 1 and stored in the storage unit 18 as needed during initial operation or maintenance after the installation of the key telephone device, and is stored in the storage unit 18. Realize processing. The program received from the data communication network 52 or the telephone network 51 instead of from the recording medium 19 may be used. In this case, the program is received by the control unit 17 via the data communication network connection unit 12 or the telephone network connection unit 11 and stored in the storage unit 18.
[0018]
When the key telephone 2 makes a call via the telephone network 51, the control unit 17 connects a path between the telephone network connection unit 11 and the key telephone connection unit 14 via the switch 15. A voice signal (voice data) from the telephone network 51 side is converted into voice data by the telephone network connection unit 11 and transmitted to the button telephone 2 via the switch 15, the key telephone connection unit 14 and the extension transmission path 20. The The voice data from the key telephone 2 is input to the telephone network connection 11 via the extension line 20, the key telephone connection 14 and the switch 15, where it is converted into a voice signal (voice data) and converted to the telephone network. 51 is transmitted.
[0019]
On the other hand, when the IP telephone terminal 3 makes a call via the data communication network 52, the path between the data communication network connection unit 12 and the IP telephone terminal connection unit 13 is connected by the control unit 17. Then, the voice packet from the data communication network 52 side is transmitted to the IP telephone terminal 3 through the data communication network connection unit 12, the IP telephone terminal connection unit 13 and the data communication path 30. Voice data from the IP telephone terminal 3 is transmitted to the data communication network 52 side via the data communication path 30, the IP telephone terminal connection unit 13, and the data communication network connection unit 12.
[0020]
When the key telephone 2 makes a call via the data communication network 52, the voice packet from the data communication network 52 side is input to the data / voice conversion unit 16 via the data communication network connection unit 12 to be voice data. Converted to Then, the voice data is transmitted to the key telephone 2 via the switch 15 and the key telephone connecting unit 14. The voice data from the key telephone 2 is input to the data / voice converter 16 via the key telephone connector 14 and the switch 15 and converted into voice packets. Then, the data is transmitted from the data communication network connection unit 12 to the data communication network 52 side.
[0021]
On the other hand, when the IP telephone terminal 3 makes a call via the telephone network 51, a voice signal (voice data) from the telephone network 51 is output as voice data from the telephone network connection unit 11 and passes through the switch 15. Are input to the data / voice converter 16 and converted into voice packets. Then, the voice packet is transmitted to the IP telephone terminal 3 via the IP telephone terminal connection unit 13. Voice packets from the IP telephone terminal 3 are input to the data / voice conversion unit 16 and converted into voice data. And it inputs into the telephone network connection part 11 via the switch 15, and is transmitted to the telephone network 51 side as an audio | voice signal (audio | voice data).
[0022]
Further, when the telephone network 51 and the data communication network 52 are relay-connected, a voice signal (voice data) from the telephone network 51 is output as voice data from the telephone network connection unit 11, via the switch 15. Are input to the data / voice converter 16 and converted into voice packets. Then, the voice packet is transmitted from the data communication network connection unit 12 to the data communication network 52 side. Voice packets from the data communication network 52 side are input to the data / voice conversion unit 16 via the data communication network connection unit 12 and converted into voice data. Then, the voice data is input to the telephone network connection unit 11 via the switch 15 and transmitted to the telephone network 51 side as a voice signal (voice data).
[0023]
FIG. 3 is a block diagram showing the configuration of the IP telephone terminal.
The IP telephone terminal 3 is provided with a data communication unit 31, a voice processing unit 32, a terminal control unit 33, a display unit 34, an operation unit 35, and a storage unit 36.
The data communication unit 31 is a circuit unit that performs packet communication with the main apparatus 1 via the data communication path 30. The voice processing unit 32 is a circuit unit that mutually converts voice packets and voice signals exchanged by the data communication unit 31 and outputs various signal sounds such as ringtones. The terminal control unit 33 includes a microprocessor such as a CPU and its peripheral circuits, and reads a predetermined program to control each unit.
[0024]
The display unit 34 is a circuit unit that displays various types of information using an LCD or LED. The operation unit 35 is a circuit unit that detects user operations using dial keys and various function keys. The storage unit 36 is a circuit unit that stores programs executed by the terminal control unit 33 and various information necessary for the processing.
The key telephone 2 has the same configuration as the IP telephone terminal 3 in FIG. 3 except that it has a data transmission unit that performs extension transmission with the main device 1 instead of the data communication unit 31. Detailed description here is omitted.
[0025]
In the above, the case where the telephone network connection unit 11, the switch 15, the data / voice conversion unit 16, the key telephone connection unit 14, and the key telephone 2 are provided as an example of a configuration for performing a call using the telephone network 51. As described above, when a voice packet call using the data communication network 52 is performed instead of the call network 51, the above-described configurations are not essential, and a configuration without these configurations may be used. Further, when making a call using the data communication network 52 with the key telephone 2, the telephone network connection unit 11 may not be provided.
The present invention also relates to a call control using a line of another button telephone device at the time of making a call, and each button telephone device includes one or more telephones, that is, a key telephone 2 or an IP telephone terminal 3. Just do it.
[0026]
FIG. 4 shows an external view of the telephone. The telephone is provided with a handset 41, a screen display unit 42, and various buttons. In addition to the dial key 43, the various buttons include an external line button 44, an internal line button 45, and a hold button 46 provided corresponding to the external lines 1 to 4. In particular, each of the outside line buttons 44 is provided with an outside line lamp such as an LED, and the state of each outside line is displayed. In addition, a cursor button 47 for operating the display contents of the screen display unit 42, a determination button 48 for determining selection, and a return button 49 for returning the display contents to the original are provided.
As described above, the IP telephone terminal 3 may be a telephone dedicated to a telephone call or may be an information communication terminal such as a personal computer having a telephone call function.
[0027]
Next, the operation of the button telephone system according to the first embodiment will be described with reference to FIG. 5, FIG. 6, and FIG. FIG. 5 is an example of setting of line management information in each key telephone apparatus. FIG. 6 is an explanatory diagram showing the correspondence between the call operation based on the line management information of FIG. 5 and the line, and FIG. 7 is a sequence diagram showing the call operation of the button telephone system according to the present embodiment.
Below, of the two button telephone devices 10A and 10B that accommodate the IP telephone terminals 3A and 3B, the line of the button telephone device 10A is used in response to a call operation from the IP telephone terminal 3B of the button telephone device 10B. An example of the case will be described.
[0028]
When the telephone network 51 is a public telephone network, one communication path is formed for each physical telephone line. When the telephone network 51 is an ISDN network, two telephone calls are made for each physical telephone line. A path (channel) is formed. When performing an IP call on the data communication network 52, one or more communication paths (channels) are virtually formed for each physical communication line according to the communication band.
In the present invention, a speech path realized by such a physical speech line or communication line and used for a call is generically called a line. Also, in a call operation at a key telephone or an IP telephone terminal, a line used for a telephone call with a telephone outside the key telephone system in order to distinguish it from an extension telephone call with the key telephone or the IP telephone terminal in the key telephone system. Is called an outside line, and is assumed to be provided as an outside line button on the telephone as shown in FIG.
[0029]
Here, each of the key telephone devices 10A and 10B is provided with two lines, that is, a line 1 and a line 2, and two external lines, that is, an external line 1 and an external line 2, respectively. In each of the key telephone devices 10A and 10B, the telephone line 53 is terminated by the telephone network connection unit 11 of the main devices 1A and 1B to form lines 1 and 2. Further, the data communication network connection unit 12 of each main apparatus 1A, 1B terminates the communication line 54 from the data communication network 52 to form one or more lines and exchanges control data for call control with each other. To do.
[0030]
In each of the key telephone devices 10A and 10B, the line management information 18A indicating the correspondence between the external lines 1 and 2 and the lines 1 and 2 is stored in advance in the storage unit 18 of the main apparatuses 1A and 1B. In the example of FIG. 5, as the line management information of the key telephone device 10A, the lines 1 and 2 of the button telephone device 10A are associated with the external line 1, and the line 1 of the button telephone device 10B is associated with the external line 2. ing. Further, as the line management information of the button telephone device 10B, the lines 1 and 2 of the button telephone device 10B are associated with the external line 1, and the lines 1 and 2 of the button telephone device 10A are associated with the external line 2. . When a plurality of lines are associated with one external line, one free line is selected from these lines randomly or with a predetermined priority.
[0031]
In such an operating environment, when a call operation using the external line 2 is performed at the IP telephone terminal 3B, the button telephone system operates as shown in FIG.
First, when the handset of the IP telephone terminal 3B is off-hooked by the user and the external line 2 button is pressed, the off-hook operation is detected and notified to the main apparatus 1B (step 100), and the external line 2 button is pressed. Is detected and notified to the main apparatus 1B (step 101).
In response to this, a dial tone (DT) is output from the main apparatus 1B to the IP telephone terminal 3B (step 102), and the subsequent dialing operation of the destination telephone number by the user is detected and notified to the main apparatus 1B. (Step 103), the call operation for the outside line 2 is completed.
[0032]
In the main apparatus 1B, the call control unit 17A of the control unit 17 receives a call operation of the external line 2 from the IP telephone terminal 3B, and refers to the line management information 18A of the storage unit 18 to determine the line corresponding to the external line 2 Confirm (step 104).
In this case, as shown in FIG. 5, since the lines 1 and 2 of the key telephone device 10A are associated with the external line 2, the main device 1B is connected to the main device 1A of the key telephone device 10A. Then, a call request specifying the lines 1 and 2 is transmitted (step 105). This call request is received by the data communication network connection unit 12 of the main apparatus 1A from the data communication network connection unit 12 of the main apparatus 1B via the data communication network 52.
[0033]
In the main apparatus 1A, the call control means 17A of the control unit 17 accepts the call request, returns a call confirmation to the transmission source main apparatus 1B (step 106), and the line 1 specified by the call request is sent. , 2 are selected randomly or with a predetermined priority (step 107).
Here, when the line 2 is selected, the call control means 17A controls the telephone network connection unit 11 to transmit a call setting message using the line 2 to the partner telephone 6 (step 108). In response to the call message (step 109), the call message is transmitted to the main apparatus 1B (step 110). As a result, the call control means 17A of the main apparatus 1B outputs a ringing tone to the IP telephone terminal 3B (step 111).
[0034]
Thereafter, when a response message is transmitted from the other party telephone 6 in response to a response operation at the other party telephone 6 (step 112), the call control means 17A of the main apparatus 1A controls the telephone network connection unit 11 to control the line 2 (Step 113), and a response message is transmitted to the main apparatus 1B (step 114).
The main apparatus 1B controls the data communication network connection unit 12 in response to the response message to form a call (VoIP) connected to the call using the line 2 of the main apparatus 1A (step 115). The call is connected to IP telephone terminal 3B (step 116).
As a result, a call between the IP telephone terminal 3B and the partner telephone 6 using the line 2 of the main apparatus 1A is established.
[0035]
As described above, the line management information is previously associated with the line management information for the call operation on the telephone, and the corresponding line is referred to by referring to the line management information according to the call operation. After confirming and making a call request specifying the line to another button telephone device corresponding to the line, it is easy to specify the line of the other button telephone device desired by the user when making a call can do.
Thus, for example, when a call is made to a destination close to the area of another button telephone device installed in a remote place, it is possible to easily make a call by designating a line of the other button phone device. Call costs can be reduced by connecting the communication lines such as the Internet, which is cheaper than the public telephone network. Further, not only the call cost but also a line necessary for the call can be selected based on the line type and the line bandwidth.
[0036]
Next, the operation of the button telephone system according to the second embodiment of the present invention will be described with reference to FIG. 8, FIG. 9, and FIG. FIG. 8 shows a setting example of line management information in each key telephone apparatus. FIG. 9 is an explanatory diagram showing the correspondence between the call operation based on the line management information of FIG. 8 and the line, and FIG. 10 is a sequence diagram showing the call operation of the button telephone system according to the present embodiment.
In the first embodiment described above, the case where the line of another key telephone device is associated with the call operation has been described. In the present embodiment, a case will be described as an example in which a call operation set in another key telephone device is associated with the call operation.
[0037]
In each of the key telephone devices 10A and 10B, the line management information 18A indicating the correspondence between the external lines 1 and 2 and the lines 1 and 2 is stored in advance in the storage unit 18 of the main apparatuses 1A and 1B. In the example of FIG. 8, as the line management information of the key telephone apparatus 10A, the lines 1 and 2 of the button telephone apparatus 10A are associated with the external line 1, and the external line 1 of the button telephone apparatus 10B is associated with the external line 2. ing. Further, as the line management information of the button telephone device 10B, the external line 1 is associated with the lines 1 and 2 of the button telephone device 10B, and the external line 2 is associated with the external line 1 of the button telephone device 10A.
[0038]
In such an operating environment, when a call operation using the external line 2 is performed at the IP telephone terminal 3B, the button telephone system operates as shown in FIG.
First, when the handset of the IP telephone terminal 3B is off-hooked by the user and the outside line 2 button is pressed, the off-hook operation is detected and notified to the main apparatus 1B (step 130), and the outside line 2 button is pressed. Is detected and notified to the main apparatus 1B (step 131).
In response to this, a dial tone (DT) is output from the main apparatus 1B to the IP telephone terminal 3B (step 132), and the subsequent dialing operation of the destination telephone number by the user is detected and notified to the main apparatus 1B. (Step 133), the call operation for the outside line 2 is completed.
[0039]
In the main apparatus 1B, the call control unit 17A of the control unit 17 receives a call operation of the external line 2 from the IP telephone terminal 3B, and refers to the line management information 18A of the storage unit 18 to determine the line corresponding to the external line 2 Confirm (step 134)
In this case, as shown in FIG. 5, since the outside line 1 of the key telephone device 10A is associated with the outside line 2, the outside line 1 is designated to the main device 1A of the button telephone device 10A. A call request is transmitted (step 135). This call request is received by the data communication network connection unit 12 of the main apparatus 1A from the data communication network connection unit 12 of the main apparatus 1B via the data communication network 52.
[0040]
In the main apparatus 1A, the call control means 17A of the control unit 17 accepts the call request, and returns a call confirmation to the main apparatus 1B as the transmission source (step 136). Since the outside line 1 is specified in the call request, the lines 1 and 2 of the button telephone apparatus 1A are confirmed as the corresponding lines with reference to the line management information 18A in the storage unit 18 (step 137). ) A free line is selected from these lines 1 and 2 at random or with a predetermined priority (step 138).
Here, when the line 2 is selected, the call control means 17A controls the telephone network connection unit 11 to transmit a call setting message using the line 2 to the partner telephone 6 (step 139). Thereafter, it operates in the same procedure as steps 109 to 116 in FIG. 7, and a call between the IP telephone terminal 3B and the partner telephone 6 is established using the line 2 of the main apparatus 1A.
[0041]
As described above, in the line management information, the call operation set in the other button telephone device is associated with the call operation, so that the common association among the plurality of button telephone devices can be used. Therefore, the common line environment can be easily used, and the setting work of line management information in each key telephone apparatus can be greatly reduced.
For example, when the same user uses a plurality of button telephone devices 10A and 10B together, there is a case where the same line environment as that of the outside line 1 used in the button telephone device 10A is desired to be used in other button telephone devices 10B. In such a case, as described above, the same line environment as that of the original button telephone apparatus 10A can be easily obtained by associating the outer line 2 button of the button telephone apparatus 10B with the outer line 1 button used in the original button telephone apparatus 10A. It can be used for network management information setting work can be greatly reduced.
[0042]
Further, when the line environment of the button telephone apparatus 10A changes, the line management information of the button telephone apparatus 10A is changed, and the new line environment is used without changing the line management information in the other button telephone apparatus 10B. This can greatly reduce the work of setting line management information.
[0043]
In each of the above-described embodiments, a case has been described in which a call path (channel) formed by the telephone line 53 of the telephone network 51 accommodated in each button telephone apparatus is used as a line and associated with a call operation. However, the line to be associated at this time is not limited to the communication path formed by the telephone line 53. For example, in addition to the communication path formed by an analog telephone line or ISDN line, the communication line 54 of the data communication network 52 is used. A speech path virtually formed using a voice packet communication technology such as VoIP may be associated with the call operation.
Further, in each of the above-described embodiments, a case where the association between each call operation and the line in the line management information is commonly used in each telephone accommodated in each button telephone apparatus will be described as an example. However, the present invention is not limited to this, and line management information may be provided for each telephone so as to be set individually, and a detailed service according to each user's request can be provided.
[0044]
【The invention's effect】
As described above, the present invention performs call control by exchanging control data between a plurality of button telephone devices via a data communication network, and forms a communication path by exchanging voice data. A button telephone system that realizes a call using a line of another button telephone device by using the communication path. Outside line button Stores line management information indicating the correspondence between lines and lines of other key telephone devices. Outside line button Depending on the operation, the line management information in the storage Outside line button The line corresponding to is confirmed, and other button telephone devices that connect the line are requested to make a call using the line via the data communication network. Can make a call by designating a line of another desired button telephone apparatus.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a key telephone system according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a button telephone device.
FIG. 3 is a block diagram showing a configuration of an IP telephone terminal.
FIG. 4 is an external view of a telephone.
FIG. 5 is a setting example of line management information in the first embodiment of the present invention;
FIG. 6 is an explanatory diagram illustrating a correspondence relationship between a call operation and a line according to the first embodiment of this invention.
FIG. 7 is a sequence diagram showing a call operation in the first embodiment of the present invention.
FIG. 8 is a setting example of line management information in the second embodiment of the present invention;
FIG. 9 is an explanatory diagram showing a correspondence relationship between a call operation and a line in the second embodiment of the present invention.
FIG. 10 is a sequence diagram showing a calling operation in the second embodiment of the present invention.
FIG. 11 is an explanatory diagram showing a conventional button telephone system.
[Explanation of symbols]
10A, 10B,..., 10N ... button telephone apparatus, 1 ... main apparatus, 11 ... telephone network connection section, 12 ... data communication network connection section, 13 ... IP telephone terminal connection section, 14 ... button telephone connection section, 15 ... switch 16 ... Data / Voice conversion unit, 17 ... Control unit, 17A ... Call control means, 18 ... Storage unit, 18A ... Line management information, 19 ... Recording medium (program), 2 ... Key phone, 20 ... Extension transmission line, DESCRIPTION OF SYMBOLS 30 ... Data communication path, 3 ... IP telephone terminal, 31 ... Data communication part, 32 ... Voice processing part, 33 ... Terminal control part, 34 ... Display part, 35 ... Operation part, 36 ... Memory | storage part, 41 ... Handset, 42 ... Screen display section, 43 ... Dial key, 44 ... Outside line button, 45 ... Extension button, 46 ... Hold button, 47 ... Cursor button, 48 ... Enter button, 49 ... Return button, 51 ... Telephone network, 52 ... Data communication network, 3 ... telephone line, 54 ... communication line, 6 ... the other phone.

Claims (3)

A plurality of button telephone devices each including one or more telephones and a main device for connecting the line from the telephone network and accommodating the telephone and exchanging and connecting the telephone to the line. The device performs call control by exchanging control data via a data communication network, forms a communication path by exchanging voice data, and uses the communication path to connect another button telephone device line. A button telephone system that realizes a call using
The main device of the key telephone device is:
Storage means for storing line management information indicating an association between an external line button provided on the telephone and a line of another button telephone device;
In response to the operation of the external line button on the telephone, the line corresponding to the external line button is confirmed from the line management information of the storage unit, and a call using the line is made to another button telephone apparatus connecting the line And a control means for requesting via the data communication network. The button telephone system according to claim 1,
The key management system according to claim 1, wherein the line management information is associated with a plurality of lines of other key telephones that are line candidates used for the call to the external line button. The button telephone system according to claim 1,
In the line management information, a call telephone operation set in line management information of another button telephone device is associated with the external line button.

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