JPH04245749A - Key telephone set with connecting external apparatus - Google Patents

Abstract

PURPOSE:To offer an external apparatus connecting key telephone set capable of automatically opening a main wire or automatically responding to the main wire without operating the key telephone set and easily attaining response and communication operation based upon the automatic opening/response. CONSTITUTION:The external apparatus connecting key telephone set including a master device 1 for system control, voice lines 2 for transmitting analog voice to the master device 1, data lines 3 for executing data communication and power supply, a speaking part 7 for executing speaking, a data transmitting/ receiving part 5 for transmitting/receiving data, and a control part 6 is also provided with a connection terminal 9 for connecting an external apparatus 10, interlocking change-over switch 8 for switchably connecting the voice lines 2 to the speaking part 7 and the terminal 9, a DC suppling part 13 for supplying the DC of the data lines 3 to the terminal 9, and a DC detecting part 14 connected between the DS supply part 13 and the terminal 9 to detect a DC flow and send the detecting information to the control part 6.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an external device button telephone, and more particularly to a circuit configuration of an external device connection button telephone to which an external device is connected.

0002

2. Description of the Related Art As shown in FIG. 2, a conventional external device connection key telephone includes a key telephone 4, and a main device connected to the key telephone 4 by a voice line 2 and a data line 3.
It is connected to the. The button telephone 4 includes a control section 6. The control section 6 is connected to the data line 3 via the data transmission/reception section 5. The audio line 2 is connected to the communication section 7 through one contact of two interlocking changeover switches 8, and is connected to a connection terminal 9 for connecting an external device 10 through the other contact. Further, the button 11 provided in the button telephone 4 is connected to the control unit 6 through a signal line b, and is connected to control the changeover switch 8 through a signal line a of the control unit 6.

[0003] Now, when the control unit 6 sends a central line acquisition signal to the main unit 1 via the data transmitting/receiving unit 5 and the data line 3, the main unit 1 connects the central line 12 to the audio line 2. The communication section 7 communicates with the office line 12 via the changeover switch 8. Next, when the button 11 is pressed down, the signal line b receives the signal, and the signal line a switches the selector switch 8 to the connection terminal 9 side, connecting the external device 10 (for example, a computer) to the central office line 12 and communicating. .

0004

[Problems to be Solved by the Invention] The above-described conventional external device connection button telephone does not have a means for detecting that the external device 10 has terminated communication with the central office line 12. There is a problem in that if the station line 12 is not released, the station line 12 will continue to be captured. Further, even if the external device 10 has a central office line acquisition function, there is a problem in that the central telephone 12 must be acquired by the key telephone 4 and the external device 10 must be connected by pressing the button 11.

[0005] Therefore, an object of the present invention is to provide an external device connection button that can automatically open or automatically answer a central office line without operating a button telephone, and that can easily perform response and communication operations. The purpose is to provide telephones.

[0006]

[Means for Solving the Problems] According to the present invention, there is provided a main device for system control, an audio line for communicating analog audio to the main device, a data line for communicating data and supplying power, and a telephone line for communicating analog audio to the main device. An external device connection button phone that includes a telephone communication section for transmitting and receiving data, a data transmission and reception section for transmitting and receiving data, and a control section consisting of a microcomputer. between the direct current supply section and the connection terminal; There is obtained an external device connection button telephone set, which is characterized in that it has a direct current detection section that detects the flow of direct current and sends the detection information to the control section.

[0007]

[Function] According to this external device connection button telephone, when the external device terminates communication with the central office line, the central office line can be automatically released without operating the button telephone, and the incoming call is received by the button telephone. If a facsimile, computer, headset, etc. is used as an external device, the answer can be automatically answered by operating the external device without operating the key telephone. do.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an external device connection button telephone according to the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an external device connection button telephone according to the present invention. In this embodiment, the same parts as in FIG. 2 will be described with the same reference numerals. The button telephone 4 is connected to the main unit 1 by a voice line 2 and a data line 3. A control section 6 consisting of a microcomputer is connected to a data transmitting/receiving section 5.
It is connected to data line 3 via. audio line 2
is connected to the communication unit 7 through one contact of two interlocking changeover switches 8, and is connected to a connection terminal 9 for connecting an external device 10 through the other contact.

Further, the output section of the DC supply section 13 connected to the data line 3 is connected to the connection terminal 9 via the DC detection section 14.
is connected to. The detection output of the DC detection section 14 is connected to the signal line c.
The output signal line a of the control unit 6 controls the changeover switch 8.

[0010] Now, when the external device 10 closes the DC supplied from the DC supply unit 13 while the communication unit 7 is in communication with the central office line 12 via the changeover switch 8, the audio line 2 and the main device 1, this The DC detection unit 14 detects the flow of DC and notifies the control unit 6 through the signal line c. When the control section 6 switches the changeover switch 8 from the communication section 7 to the connection terminal 9 side using the signal line a, the external device 10 enters a state of communication with the office line 12.

Next, when the external device 10 opens the DC connection, the DC detection unit 14 detects the stoppage of the DC flow, and notifies the control unit 6 of the stoppage of the DC connection via the signal line c. The changeover switch 8 is switched and connected from the connection terminal 9 to the communication part 7 side by the signal line a. At the same time, when the communication end data is transmitted to the main device 1 via the data transmitting/receiving section 5 and the data line 3, the main device 1 releases the connection between the office line 12 and the audio line 2, and the office line 12 is in the closed state. to open.

Further, when the external device 10 responds in the incoming call state, the DC detection section 14 detects the response and notifies the control section 6 through the signal line c. The control section 6 switches and connects the changeover switch 8 from the communication section 7 to the connection terminal 9 side using the signal line a. At the same time, when response data is transmitted to the main device 1 via the data transmitting/receiving section 5 and the data line 3, the main device 1 connects the central office line 12 and the audio line 2, and the external device 10 enters a state of communication with the central office line 12. .

[0013]

Effects of the Invention As described above with reference to the embodiments, according to the external device connection button telephone of the present invention, a direct current supply section and a direct current detection section are added to a conventional button telephone connected to an external device, and the direct current detection section By configuring the control unit to control the changeover switch according to the output of
When an external device ends communication with the central office line, the central office line can be automatically released without operating a key telephone. .

[0014] Furthermore, when there is an incoming call on the button telephone,
By answering the external device without operating the button telephone,
It can respond automatically, and when external devices such as a facsimile, computer, or headset are used, it has the effect of facilitating response and communication operations using these devices.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of an embodiment of an external device connection button telephone according to the present invention.

FIG. 2 is a circuit block diagram showing an example of a conventional external device connection button telephone.

[Explanation of symbols]

1 Main device 2 Audio line 4 button telephone 5 Data transmission/reception section 6 Control section 7　Telephone section 8 Selector switch 9 Connection terminal 10 External equipment 12　Publication line 13 DC supply section 14 DC detection section

Claims (1)

[Claims] [Claim 1] A main device that controls the system;
A control unit consisting of an audio line for communicating analog audio to the main device, a data line for communicating data and supplying power, a communication section for making telephone calls, a data transmitting and receiving section for transmitting and receiving data, and a microcomputer. An external device connection button telephone set comprising: a connection terminal for connecting an external device; a changeover switch that is interlocked to switch and connect the audio line to the talking section and the connection terminal under the control of the control section; a DC supply unit that supplies DC from the data line to the connection terminal; a DC detection unit that is located between the DC supply unit and the connection terminal and detects the flow of DC and sends the detected information to the control unit; An external device connection button telephone set, characterized in that it has a button.