JPH01265627A - Interface device for automobile telephone set for data transmission equipment - Google Patents

Abstract

PURPOSE:To prevent interruption of a line during talking when a data transmission equipment is removed by using a relay circuit so as to connect each signal line of a handset side to a radio equipment side directly if the connection of each signal line of a connector is disconnected. CONSTITUTION:A relay 5d switching the connection of lines for signals TX, RX, HK from a radio equipment 1 between a facsimile equipment 4 and a handset 2 is arranged in an interface 5. Suppose that the equipment 4 is disconnected from the device 5, since the earth side line of a winding L of the connector 5a is disconnected, the relay 5d is turned off and the contacts are thrown to the position of contacts b1, b2. Thus, lines for signals TX, RX, HK for the radio equipment 1 are connected to corresponding lines of the connector 5b. Thus, speech is applied by a prescribed outgoing and incoming operation of the handset 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a car phone interface device of a data transmission device for transmitting data with a car phone.

[Prior Art] Generally, when a car phone is used for facsimile communication, an interface device is installed between the car phone's wireless device 1 and the handset 2, as shown in FIG. 13
A facsimile machine 4 is connected to the InterAce machine 3.

In this case, the interface device 3 usually has JIS-
Connectors 3a and 3b conforming to the C5432 standard are attached, and the wireless device 1. Handsets 2 are connected respectively.

°Also. A connector 3c is attached to the interface device 3, and a connector 4a is attached to the facsimile device 4, and the two are connected through these, so that the connection and disconnection force 5 of each of the above devices can be freely performed.
-' The connectors 3a and 3b have 24 signal lines, and this is one of the 24 signal lines in the interface device 13.

Four signal lines, a hook signal HK, a transmission signal TX, a reception signal RX, and a ground GND, are taken out and connected to the facsimile machine 4 side.

Within the facsimile machine 4, each of the four signal lines is connected to a switch circuit 4b. And the facsimile tribe! ! 4 is not working, the wireless device! The signal lines of the transmission signal TX and reception signal RX are connected to the hook signal H on the 1 side and the handset 2 side.

By operating the handset 2, a car phone call can be made as usual.

Incidentally, the facsimile device 4 may be removed from the interface device 3 side, for example, during maintenance. In this case, remove connector 3c or 4a,
Then, the hook signal 11 disconnects the transmission signal TX and reception signal RX signal lines.

You will no longer be able to operate the handset 2 or make calls.

At that time, use a wireless bag! ! 1 and the handset 2 can be directly connected with a cable, but 1 usually requires a wireless device or interface! ! 3 is installed in the trunk of an automobile, so such connection work is troublesome.

On the other hand, for such cases, the interface equipment fi
3 is provided with a switch for directly connecting the wireless bag Ml and the handset 2, and its interface device fi3 is also installed near the facsimile machine 4. However, in this case, it is troublesome to operate the switch after removing the facsimile device 4.

Furthermore, for example, if the facsimile machine 4 is removed during a call, the line will be disconnected, which is an inconvenience.

As described above, conventionally, when the facsimile device 4 is removed, there have been problems in that the operation for connecting the wireless device 11 and the handset 2 is troublesome, and that the line during one call is disconnected.

Note that this problem is not limited to facsimile machines, but also occurs when various data transmission devices are connected to a car telephone device.

[Objective] The present invention solves the above problems and eliminates the need for other operations when removing a data transmission device.

It is an object of the present invention to provide an interface device for a car phone of a data transmission device in which a line during a call is not disconnected.

[Configuration] In addition, in the present invention, each signal line on the wireless device side and the handset side of a car phone is connected to a data transmission device as necessary using a connector, and the connection by the connector is removed. In this case, the signal lines on the wireless device side and the handset side are directly connected by a relay circuit.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a circuit configuration diagram of an interface device according to an embodiment of the present invention. In FIG. 0, the interface device s includes a connector 5a.

5b is attached, and, although not shown, the wireless device l of the car telephone and the handset 2 are connected as in the case of FIG. Further, a connector 5c is attached to the interface device W5, and a connector 4a is attached to the facsimile device 4, and the connector 5c and the connector 4a are connected by a cable, and the facsimile group ra4 is connected. The connectors 5a and 5b comply with the JIS-C5
It is based on the 432 standard.

A relay 5d is disposed within the interface device 5. Of the 24 signal lines on the connector 5a, that is, the wireless device 1 side, the power supply +V line is connected to the winding of the relay 5d,
1ffL, and the other end is connected to the ground line of the facsimile machine 4 via the connector 5c and the connector 4a. Also, the ground GN on the wireless device 1 side
The D line is connected to the ground line of the facsimile machine 4 via connectors 5c and 4a.

Further, the line of the transmission signal TX on the side of the wireless device l is connected to the common terminal C□ of the relay 5d, the line of the reception signal RX is connected to the common terminal c2, and the line of the hook signal HK is connected to the common terminal C1. Contact a1 on the break side of relay 5d is connected to switch circuit 4b via connectors 5c and 4a.
It is connected to the common terminal C1 of. Also.

Similarly, contacts azta:a of the relay 5d are respectively connected to the common terminal CI#C@ of the switch circuit 4b.

A contact b□ on the make side of the relay 5d is connected to the connector 5b, that is, the transmission signal TX line on the handset 2 side, and is also connected to the contact a4 of the switch circuit 4b via the connectors 5c and 4a. Similarly, the contacts S, b□ of the relay 5d are connected to the reception signal RX and hook signal ■ lines on the handset 2 side, and
They are respectively connected to the contact areas of the switch circuit 4b. The signal lines other than those mentioned above on the wireless bag Nl side are directly connected to the handset 2 side. Also, the contact b4 of the switch circuit 4b. b, is connected to the modem circuit;
Contact b6 is connected to the ground line.

With the above configuration, the power supply ◆V line on the wireless device L side is
A voltage of +12V is supplied from wireless device i. In this state where each device is connected, the above voltage is applied to one end of the winding of the relay 5d, and the other end is applied to the connector 5.
Since it is connected to the earth GND via c and 4a,
Relay 5d turns on. As a result, each contact of the relay 5d is connected to the contacts b to b. Further, when the facsimile machine 4 is not operating, the switch circuit 4b
It is connected to the contacts 84 to 81 side.

As a result, the transmission signal TX and reception signal R on the wireless device 1 side are
The X and hook signal HK lines are connected to the corresponding lines on the handset 2 side through the contacts of the relay 5d, the connectors 5c and 4a, and the switch circuit 4b.

Therefore, the operator uses handset 2 as a wireless bag! ! l
As in the case where the handset 2 is directly connected to the telephone, telephone calls can be made as usual by performing predetermined calling and receiving operations on the handset 2.

In addition, when performing facsimile communication, after discussing with the other party that facsimile communication will be carried out through the above-mentioned telephone call, a predetermined operation is performed on the facsimile machine Wt4. 4 is activated, and the switch circuit 4b is switched to the a4-a side.

Therefore, the transmission signal TX and reception signal RX lines on the wireless device i side are connected to the modem circuit of the facsimile device 4 to enable data transmission, while the hook signal HK line is connected to the ground line and off-hook. The state is maintained. As a result, predetermined facsimile communication is executed.

Next, for maintenance or the like of the facsimile machine 4, the connector 5c or the connector 4a is disconnected, and the facsimile machine! 4 is the interface installation 'R5
Suppose that it is separated from Then.

Since the ground line of the winding of the connector 5a is cut, the relay 5d is turned off, and its respective contacts are
, switch to the side.

As a result, the transmitted signal TX and received signal R on the wireless device l side are
x and hook signal HK lines are connected to corresponding lines on the connector 5b side. Therefore, the operator
Similarly to the above, by performing predetermined calling and receiving operations on the handset 2, it becomes possible to make a call as usual.

As described above, in this embodiment, in the interface device M5, the transmission signal TX, the reception signal RX, and
A relay 5d is provided to switch the connection of each line of the hook signal HK to the facsimile device 14 side and the handset 2 side, and the facsimile device 4 is connected to the interface device 15.
when the connector is connected to.

While connecting each of the above lines to the facsimile machine 4 side,
When the facsimile machine 4 is disconnected.

Each of the above lines is connected directly to the handset 2 side.

This allows you to remove the facsimile machine.

In order to connect the signal line between the wireless device I and the handset 2, the connector connection was changed as in the past.

Other operations such as operating a reswitch become unnecessary.

Furthermore, even if the facsimile machine 4 is disconnected during a call, each of the above lines is instantly connected to the handset 2 side.
The line will no longer be disconnected during a call.

In the above embodiment, the operating power for the relay 5d is supplied from the wireless bag AT side, but it goes without saying that other methods such as supplying it from the facsimile machine 4 side may be used. Although the electromagnetic relay 5d is used to switch the wires, it can also be constructed using a semiconductor circuit.

Further, although the case where a facsimile device is connected to a car telephone has been described, it is obvious that the present invention is similarly applicable to cases where various data transmission devices are used.

[Effects] As described above, according to the present invention, each signal line between the wireless device side and the handset side of a car phone is connected to a data transmission device using a connector as necessary. When the connection by the connector is removed, the signal lines between the two are directly connected by the relay circuit, so when the data transmission device is removed, there is no need to connect the signal lines, and This eliminates the possibility of the line being disconnected during a call.

[Brief explanation of the drawing]

FIG. 1 is a circuit configuration diagram of an interface device according to an embodiment of the present invention, and FIG. 2 is a configuration diagram of a conventional communication system. 1... Wireless device, 2... Handset, 3, 5...
・Ink face device, 3a to 3c, 4a, 5a to 5c
... Connector, 3d... Relay, 4... Facsimile machine, 4b... Switch circuit, ゛

Claims (1)

[Claims] An interface device for a car phone of a data transmission device that is disposed between a radio device of a car phone and a handset, and disconnects a part of the signal line between the two and connects each separated signal line of both to a data transmission device. , comprising a connector for connecting each of the signal lines to the data transmission device as necessary, and a relay circuit for directly connecting each of the separated signal lines when the connection by the connector is disconnected. A car phone interface device for a data transmission device, characterized in that: