JPS61103356A - Key telephone set - Google Patents

Abstract

PURPOSE:To connect a data terminal device to a key telephone set of analog system by providing a data communication line to a master set in addition to a voice channel. CONSTITUTION:When a telephone set B hooks off and a specific number is dialed, its signal is detected by a control circuit 4 of the master set A via a connection line 6. The control circuit 4 actuates a channel switch relay 12 through the detection to change over the channel to the position of data path 10. A switch signal is given also to the telephone set B at the same time to actuate a channel switching relay 14 of the telephone set B thereby switching the channel to a data terminal device 17. When the telephone set B selects a trunk line, a link switch 11 for data path connects the data path of the trunk line selected by the telephone set B and the data path of the telephone set B. Thus, the trunk line is connected directly to a data terminal device 17 without through the channel of the master set A.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a button telephone device with data terminal equipment.

Conventional Structure and Its Problems FIG. 1 shows a typical structure of a four-wire key telephone device currently in use. Further, FIG. 2 shows the configuration of the communication circuit. In FIG. 1, A indicates a main device and B indicates a telephone. l is the central line.

2 is the office line circuit, -3 is the extension circuit, 4 is the control circuit that controls the whole by a microcomputer, 5゜6 is the main unit, the connection line between the telephones, 5 is the communication line, 6 is the control signal and power supply It is a line. 7 of telephone B is the telephone communication circuit, 8
is a control circuit using a microcomputer, 9 is a dial,
This is an input/output circuit for switches such as station line buttons and displays.

In FIG. 2, 1 is a central line DC loop circuit, 2 is a communication transformer, and 3 is a C-MOS link switch.

4 is a DC supply circuit to the telephone set.

Next, the operation of the above conventional example will be explained.

In FIG. 1, telephone B, which is a key telephone device, has a control circuit 8 inside thereof, and operates while transmitting and receiving control signals to and from main device A. For this reason, only a dedicated telephone whose interface is compatible with that of main device A can be connected to the terminal of telephone B, and data terminal equipment such as a personal computer (PC) or FAX can be directly connected instead of the telephone. was impossible. Furthermore, as shown in FIG. 2, since the communication path is designed for the purpose of voice communication, it is of course impossible to transmit digital signals as they are. Also, by using modulation and demodulation signals by modem,
Even if signal transmission of 12,008 PS or less is possible, transmission at higher speeds would be impossible because phase distortion would occur due to the transformer or semiconductor circuit inserted in the circuit.

In this way, if the call control method is an analog method, it is impossible to connect equipment that performs data communication as a terminal of main device A. In order to eliminate this drawback, a method is to digitize all call control. However, considering the purpose of the device, most of the calls are voice calls, and some use data terminal connection functions.1. o For use &′″
However, it was very expensive and lacked economy.

OBJECTS OF THE INVENTION The present invention aims to eliminate the drawbacks of the above-mentioned conventional examples, and provides a button telephone device whose call control method is an analog method.
The purpose is to easily connect data terminal equipment to the terminal.

Structure of the Invention In order to achieve the above object, the present invention provides, in addition to a communication path for voice communication, a second communication path (hereinafter referred to as a data bus) capable of data communication in the main device, and a communication path for voice communication. By providing a switching circuit and a communication path switching circuit and a data terminal device connection terminal inside the telephone, the communication path can be switched from the telephone to the data terminal device by a specific operation on the telephone of the button telephone device, and the data terminal device can be switched from the telephone to the data terminal device. This has the advantage of enabling connection with other data terminal equipment connected to the telephone line or housed within the key telephone device.

DESCRIPTION OF EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to the drawings. In Figure 3, A is the main device;
IB is a telephone. 1 to 9 in the figure are the same as those shown in FIG. 1 of the conventional example. 10 is a data bus newly provided as a second communication path for data communication, and 11 is a link switch using a relay contact or the like.

12 is a communication path switching relay (RA), 13 is its contact (r
a), 14 is a communication path switching relay (R,,) in telephone B
, 15 is its contact (rb), +6 is a data terminal equipment connection terminal, and 17 is a data terminal equipment.

Next, the operation of the above embodiment will be explained.

In Fig. 3, the communication path switching relay (usually inside the main device A)
RA)12. Call path switching relay (R,,) in telephone B
14 is not operating, its contact is on the dotted line side, and has been switched to the normal communication path side. Now, when telephone B dials a specific number using the dial 9 in the 0FF-HOOK state, the dial signal is transmitted via the control circuit 9 to the control circuit 4 in the main device A through the connection line 6 between the telephone B and the main device A. It determines that this specific number is a call path switching signal, and sends a call path switching relay (RA).
) 12 is operated, and the relay contact 13 switches the communication path to the data bus 10 side. At the same time, on the phone B side,
Sends a switching signal Telephone B's communication path switching relay (Ft,)
Operate 14. The relay contact 15 switches the communication path from the telephone B side to the data terminal equipment 17.

When telephone B selects the central office line, the data bus link switch 11 connects the data bus of the central office line selected by telephone B to the data bus with telephone B.

Therefore, the office line is directly connected to the data terminal equipment 17 of telephone B without passing through the communication circuit of main device A.

Similarly, in the case of extension selection, by dialing a specific number, not only the calling side's communication path but also the communication path of the called side's telephone is automatically switched to the data bus side, and communication with the data terminal equipment 17 is automatically switched. Connection is possible.

FIG. 4 shows the interconnection of data terminal equipment between telephone B and another telephone C. FIG. Here, the link switch 11 is a switch that connects any office line to the data terminal equipment 17 and other data terminal equipment 17, but relay contacts 13 and 15 are used to prevent phase distortion and loss in the data bus. There is.

As a result, the data terminal equipment 17 is completely connected to the central office line and the extension line using two lines. Furthermore, even when the communication path is switched to the data terminal device 17 instead of telephone B, the control circuit 8 of telephone B is always connected to main device A, and the operation of telephone B is continued. . In other words, when connected to the data terminal device 17 side, telephone B
is the same as a simple call state, and although voice calls are not possible, all other operations are possible. Therefore, if the communication path is to be returned to its original state and the voice communication is restored, it can be easily achieved by dialing a specific number or performing ON-FOOK.

Activation Effect The present invention has the above-described configuration, and provides the following effects.

Since the data terminal equipment can be housed within the key telephone equipment, (a) By performing a specific operation on the telephone, the office line provided in the key telephone equipment can be directly connected to the data terminal equipment. There is no need to install new lines for the equipment.

(b) Since it has a dedicated data bus, there is no restriction on the transmission speed of data terminal equipment, so high-speed communication is possible.

(C) It is possible to connect data terminal devices to each other using extension lines.

(d) In addition to data terminal equipment, telephone accessory equipment such as answering machines, stand-alone telephones, voice guidance equipment, and other terminals can be easily connected.

(e) It is possible to transmit digital signals without digitizing the call control of the main device.

It has the following advantages.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional 4-wire key telephone device, FIG. 2 is a block diagram of a communication circuit of the same device, FIG. 3 is a block diagram of a key telephone device according to an embodiment of the present invention, and FIG. 4 is a connection diagram between data terminal devices using the extension lines of the same device. Name of agent: Patent attorney Toshio Nakao and 1 other person
1 Figure 3

Claims (2)

[Claims] (1) Each of the main device and the telephone is provided with a voice communication path, another communication path for data communication other than the voice communication path, and a switching circuit for switching between each of the communication paths, and a data terminal device is connected to the telephone. A button telephone device equipped with a terminal. (2) Switching of the switching circuit can be done by operating a specific dial or push button switch on the telephone, making it possible to switch a voice call path to another call path, connect data terminal equipment to a central office line, or connect data terminal equipment to each other. A button telephone device according to claim 1.