JP2750940B2 - Key telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone apparatus that allows a cordless telephone to be used in addition to a wired telephone as an extension telephone.

[Prior art]

A key telephone device that allows a cordless telephone to be used as an extension telephone has been considered. In this cordless button telephone device, in order to make full use of a plurality of telephone lines accommodated in a cordless telephone handset, it is necessary to provide radio base units in the main unit for the number of accommodated telephone lines. is there. FIG. 2 shows an example of the configuration of this cordless button telephone device.
1 is a main unit, and 2a to 2n are cordless telephone handsets. In the case of this example, the main device 1 can accommodate three telephone lines, and in this example, the main device 1 accommodates three telephone lines with full capacity. That is, three telephone lines 3 ₁ , 3 ₂ , and 3 ₃ are connected to the central office circuit and the switching unit 4 of the main device 1. Then, the main unit 1, the three with respect to the office line circuit and the exchange unit 4 radio master station 5 _1, 5 _2, 5 ₃ are connected. For these wireless base stations 5 ₁ to 5 _3, common transmitting and receiving antenna 6 is provided, the distributor mixer 7 ₁ between the transmitting and receiving antenna 6 and the wireless base station 5 ₁ to 5 _3, 7 ₂ , 7 ₃ are provided. Controller 8 of the main apparatus 1 has a CPU, data between a control unit for controlling the office line circuit and the exchange unit 4 and the wireless base unit 5 ₁ to 5 _3, and the wireless master station 5 ₁ to 5 ₃ A data transmission / reception unit for transmitting / receiving data. Cordless telephone handsets 2a-2n have transmitting / receiving antennas 9a-9n
Each of the slave units 2a to 2n is a wireless master station of the main device 1.
5 _1, 5 to and from the _2, 5 ₃ either is coupled via a wireless line. The cordless telephone subunits have the same internal circuits, but different ID numbers (identification numbers) are set, and the cordless telephone subunits 2a to 2n are identified in the above-mentioned wireless line formation. It has been made. Then, between the wireless base station and the cordless phone extension master station is in a state of being connected by wireless, each cordless telephone handset, via either a telephone line 3 _1, 3 _2, 3 ₃ stations You can make a line call. Therefore, in the case of this example, a central office telephone call can be simultaneously performed by three cordless telephone handsets. In addition, when one of the wireless master stations is not used, a hold transfer between cordless telephone handsets and an extension intercommunication can be performed via the vacant wireless master station. But,
As described above, at the most busy time when office calls are simultaneously made by three cordless telephone handsets, there is no vacant radio master station. Therefore, the as shown by the dotted line in Figure 2, it is necessary to further comprise a wireless base station 5 ₄ and the distribution mixer 7 _4.

[Problems to be solved by the invention]

By the way, in the key telephone device, not all of the maximum number of telephone lines that can be accommodated are always always actually accommodated. For example, in the above example, up to three telephone lines can be accommodated. In some cases, only one or two telephone lines are accommodated. In such a case,
Of the three wireless master stations, the master station that is not used is provided in the main device 1, and accordingly, it is wasted, and
The user increases the cost burden for the wireless master station that is not used. In addition, even when the maximum number of telephone lines that can be accommodated is actually accommodated, some users may not need the functions of hold transfer and extension intercommunication during the busiest hours. However, as described above, in consideration of the hold transfer at the busiest time and the inter-extension call, when the (main phone number that can be accommodated + 1) wireless master stations are provided in the main apparatus 1 in advance, this user for, in advance one radio master station ₄ is provided a thing of the unnecessary, and correspondingly the cost burden increase. Therefore, only the minimum number of wireless master stations are first mounted on the main unit,
A method of mounting a wireless master station on the main device as necessary can be considered. However, in this case, the master station and the distribution mixer are installed in the main unit. However, construction and the like are difficult due to the structure and electrical characteristics of the cordless telephone device according to the wireless standard, and the cost is also reduced. Disadvantageous. Further, the method of providing a large number of wireless master stations in the main device 1 has a problem that it is not preferable because of mutual interference and attenuation in the distribution mixer. SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a key telephone apparatus in which the addition of a wireless communication path can be performed with a simple construction, and the interference and attenuation between wireless master stations can be reduced.

[Means for Solving the Problems]

A key telephone apparatus according to the present invention accommodates at least one telephone line and at least one telephone line.
A main device having two wired telephone connection terminals and a wireless master station; a plurality of cordless telephone handsets capable of communicating and transmitting data via a wireless line with the wireless master station; A control circuit connected to the connection terminal for transmitting / receiving a call signal and transmitting / receiving data to / from the main device, and enabling a call / data transmission to / from the cordless telephone handset via a wireless line. And a connection wireless device including a wireless transmission / reception circuit.

[Action]

In order to add a wireless communication channel, the connection wireless device may be connected to a connection terminal of a wired telephone of the main device. Therefore,
It is only necessary to mount the required minimum number of wireless master stations on the main unit.

【Example】

FIG. 1 is a block diagram of an embodiment of a key telephone apparatus compatible with a cordless telephone according to the present invention. In this example, two telephone lines are accommodated, and the same number of radio base stations as the accommodated telephone lines are provided in the main device.
This is an example in which the connected wireless device is connected to the main device instead of the wired telephone so that the hold transfer and extension intercommunication at the busiest time can be performed. Reference numeral 10 denotes a main unit, a line circuit and switching unit 11, two wireless master stations 12 ₁ and 12 ₂ , distribution mixers 13 ₁ and 13 _2, and a wired telephone connection terminal 14a for connecting a wired telephone. , 14b and extension circuit 1
5a, 15b, a data transmitting / receiving circuit 16, and controlling these,
For example, a control circuit 17 including a microcomputer (hereinafter, referred to as a CPU), a DC power supply 18, and a power separation filter 19 are provided. 51 is a transmitting / receiving antenna. Then, the extension circuits 15a and 15b are connected between the connection terminal S of the wired telephone connection terminals 14a and 14b to the extension communication line and the office line circuit and the exchange unit 11. Wired telephone connection terminal 1
The connection terminal D to the data line in 4a and 14b is connected to the data transmission / reception circuit 16. Further, a voltage from a DC power supply 18 is supplied to a connection terminal D connected to the data line via a power separation filter 19 in order to supply power to a connection wireless device 20 described later. The office line circuit and the switching unit 11, according to the control of the control circuit 17,
Connection between telephone lines and extension telephones (external call), connection between extension telephones (extension call), etc. The telephone lines 3 ₁ and 3 ₂ are connected to the line circuit of the main unit 10 and the switching unit 11.
Connected to. Then, a plurality of cordless telephone handset 30a~30n is provided as an extension phone in this example, between the wireless base station 12 _1, 12 _2, is adapted radio channel is formed. In addition, instead of the wired telephone, the connection wireless device 20 is connected to the wired telephone connection terminal 14a via a communication line 41S and a data line 41D. The connection work of the connection wireless device 20 to the wire telephone connection terminal 14a is similar to the connection work of the wire telephone and is simple. Cordless telephone handset 30a-3
0n can form a wireless line with the connection wireless device 20. The connection wireless device 20 includes a hybrid circuit 21, a wireless transmission / reception circuit 22, a control circuit 23 including a CPU, a data transmission / reception circuit 24, a power separation filter 25, a constant voltage circuit 26, and a transmission / reception antenna 27. The communication line 41S is connected to the wireless transmission / reception circuit 22 via the hybrid circuit 21. Data line 41D is data transmission / reception circuit 2.
Connected to 4. The DC voltage superimposed on the data line 41D is applied to the constant voltage circuit via the power separation filter 25.
The power supply voltage Vcc of the connection wireless device 20 is obtained from the constant voltage circuit 26. The control circuit 23 exchanges data with the data transmission / reception circuit 24 and exchanges data with the wireless transmission / reception circuit 22 to perform various controls. The cordless telephone handsets 30a to 30n have exactly the same configuration, and include a transmission / reception antenna 31, a radio transmission / reception circuit 32, a telephone 33, a transmitter 34, amplifiers 35 and 36, and a control circuit including a CPU. 37, a function button switch 38 connected to the control circuit 37, and a display circuit 39 having a display for display. Reference numeral 40 denotes a rechargeable battery such as a nickel-cadmium battery. Now, in a state where both the wireless master stations 12 ₁ and 12 ₂ are not used, for example, when a function button switch 38 is used to make a call to the office line in the cordless telephone handset 30a, the control circuit 37 controls the wireless transmitting / receiving circuit 32. And transmitting / receiving antenna 31
An outgoing request is issued to the main unit 10 via the wireless communication channel (wireless control channel). Radio master station 12 ₁ for example of the main device 10 receives this, performs establishment of radio communication channels between the cordless phone extension master station which issued the calling request, sends a call request data to the control circuit 17. The control circuit 17 performs a connection with the wireless base station 12 ₁ for example, telephone line 3 ₁ controls the office line circuit and the exchange unit 11 on the basis of the outgoing request. Accordingly, thereafter, the dial operation is performed by the cordless phone extension master station 30a, if the response is the other party, it is possible to office line call through the telephone line 3 ₁ This cordless telephone handset 30a. Then, the same time, the other through the wireless base station 12 ₂ 1
An office line call can be made via the telephone line 32 by _two cordless telephone handsets. In the case of an incoming call, on the contrary, the control circuit 17 of the main device 10 sends the incoming request data to the free wireless master station. Then, by establishing a wireless communication channel between the wireless base station and one of the cordless telephone slaves, an incoming call response by the cordless telephone slave becomes possible. As described above, the office line call through the _two telephone lines 3 ₁ and 3 ₂ by the cordless telephone handset is performed by the radio base stations 12 ₁ and 12 _2.
Can be done via Then, for example, a cordless telephone handset 30a is wireless base station 12 ₁
In office line call state through the telephone line 3 ₁ via, and,
Telephone line cordless phone handsets 30b via the wireless master station 12 ₂
3 when in a curve call state through _2, and the cordless phone extension master station 30b is a central office line hold operation will be described when transferring calls call to the cordless phone extension master station 30n. In this case, since the radio base stations 12 ₁ and 12 ₂ are in use, it is not possible to make a transfer call through these radio base stations. However, in this example, a transfer call can be made due to the presence of the connection wireless device 20. That is, the cordless telephone handset 30b performs a hold operation,
If you enter the extension number corresponding to the cordless phone extension master station 30n, wireless base station 12 ₂ receives the control information and the extension number information of the pending and sends it to control circuit 17. The control circuit 17
While performing the office line holding operation, the data transmission / reception circuit 16 sends the extension number information to the connected wireless device 20 via the data line 41D. In the connection wireless device 20, the data transmission / reception circuit 24 receives this, and the control circuit 23 controls the radio transmission / reception circuit 22,
A call is made to the cordless telephone handset 30a, and the response of the cordless telephone handset 30n establishes a wireless communication channel. The information of the response of the cordless telephone handset 30n is sent from the data transmission / reception circuit 24 of the connection wireless device 20 to the main device 10 via the data line 41D, and the control circuit 17 of the main device 10 receives the information via the data transmission / reception circuit 16 In response to this, the office line circuit and exchange
11, by controlling the extension circuit 15a, the wireless master station 12 ₂ and the extension circuit
15a is connected to form an extension communication path. This allows
Extension intercommunication between the cordless telephone handset 30b and the cordless telephone handset 30n becomes possible. Then, when the cordless telephone handset 30n performs the operation of the office line response, the information is sent to the main device 10 via the connection wireless device 20, so that the control circuit 17
Connecting the extension circuit 15a and the telephone line 3 ₂ controls the office line circuit and the exchange unit 11. Therefore, cordless telephone handset
By 30n, allowing the central office line call via the transferred telephone line 12 _2. As described above, the transfer call and the extension intercommunication are performed. When one of the wireless master stations 12 ₁ and 12 ₂ is vacant,
It is also possible to make a transfer call via the vacant wireless master station and to make an extension intercommunication. If there is an incoming line or an outgoing line during the extension intercommunication via the wireless master station, the main device 10 performs the incoming line or the outgoing line via the connecting wireless device 20. You can also do so. If another connection wireless device is connected to the wired telephone connection terminal 14b, it is possible to make an inter-extension call between two cordless telephone handsets that are not in a central office call when the two telephone lines are busy. is there. In addition, a wired telephone may be connected to the wired telephone connection terminal. Of course, the wired telephone can be used to perform a local line call, a transfer call with a cordless telephone handset, and an extension intercommunication as in a normal key telephone device. It goes without saying that you can do it. In the above example, the same number of wireless master stations as the number of telephone lines accommodated are provided in the main unit.In the main unit, the minimum number of wireless master stations smaller than the maximum number that can be accommodated is included. Of course, it is also possible to add the wireless stations by first mounting the wireless communication device and connecting the connection wireless device to the wired telephone connection terminal as appropriate.

【The invention's effect】

As described above, in the present invention, the wireless master station can be added by connecting the connected wireless device to the main device instead of the wired telephone, so that the wireless master station can be added in the main device. Wireless connection can be expanded by simpler connection work. For this reason, the necessary minimum number of wireless master stations may be initially mounted on the main device, so that the cost of the initially mounted key telephone device can be reduced. In addition, since the connection is not made via the distribution mixer at the time of expansion, there is no interference with other wireless master stations and no attenuation in the distribution mixer, so that high quality communication can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of a key telephone apparatus according to the present invention, and FIG. 2 is a diagram showing an example of a configuration of a cordless key telephone apparatus. 3 ₁ , 3 ₂ ; Telephone line 10; Main unit 11; Office line circuit and switching unit 12 ₁ , 12 ₂ ; Wireless master stations 14a, 14b; Wired telephone connection terminals 15a, 15b; Extension circuit 17; Control circuit 20; Connection Wireless devices 30a-30n; cordless telephone handset

Claims (1)

(57) [Claims] An apparatus for receiving at least one telephone line, having at least one wired telephone connection terminal,
A main device including a wireless master station; a plurality of cordless telephone handsets capable of communicating and transmitting data via a wireless line between the wireless master station; and the main device connected to the wired telephone connection terminal, A control circuit for transmitting and receiving call signals and data transmission to and from the cordless telephone handset, and a wireless transmission / reception circuit capable of transmitting and receiving calls and data via a wireless line. A key telephone device comprising: a connection wireless device;