JPS62219794A - Radio circuit connecting device - Google Patents

Abstract

PURPOSE:To widely respond to a business phone, by connecting the output of the sound detection circuit to the press-to-talk control circuit of the second connecting terminal. CONSTITUTION:A start up detection circuit 31 which detests the outgoing of the business phone starts up a radio communication equipment 40, and also, connects the SP terminal of the radio communication equipment 40 to a reception amplifier 22, by switching a switch circuit 32. In a transmission time, the transmission sound of the business phone is detected by a sound detection circuit 23, and the press-to-talk PT circuit of the radio communication equipment 40 is started up, then a signal which generates a communication state, is sent out. In an incoming from the radio circuit to the business phone, a call is confirmed by a monitor speaker 33, and a response is performed by operating the corresponding circuit button of the business phone, and after that, the call by a press-to-talk system is performed by the same operation as in an outogoing time. In this way, a business work can be efficient without operating separately the business phone and the radio communication equipment.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a wireless line connection device that enables connection between an administrative wireless communication device used in times of disaster, etc., and a business phone other than its dedicated phone. Regarding. Here, a business phone refers to a telephone exchange device that interconnects a plurality of office lines and a plurality of extension lines, and each extension telephone housed in this telephone exchange device.

[Conventional technology]

Wireless communication devices are installed in town and village offices, etc. as a means of communication when telephone communication is difficult or unavailable, or as a means of communication with areas where telephone communication is not possible. This wireless communication device is used, for example, as part of disaster prevention administration when communication means such as telephones are cut off due to a disaster.

On the other hand, business phones have come to be used as standard telephone exchange equipment in town and village offices.

In such situations, a connection can be made that connects a business phone, which is a separate device, to a wireless communication device, activates the wireless communication device in the same way as making a call from a business phone, or allows the business phone to receive an incoming call from a wireless line. equipment has been requested.

Conventionally, a connection device has been developed that enables connection between a specific private branch exchange device (-48V) and a wireless communication device, but this device is exclusive to this private branch exchange device and cannot be connected to a general business phone. I couldn't do it.

[Problem that the invention seeks to solve]

In this way, conventional connection devices that connect telephone exchange equipment and wireless communication equipment are incompatible dedicated devices, and the circuit configuration is a wire logic circuit mainly using wire spring relays. At the same time, the number of control lines also increased. Furthermore, since the connection was made using the roughing method, the connection was troublesome.

The present invention has been made in view of these conventional problems, and it is an object of the present invention to provide a wireless line connection device that is made into an electronic circuit, is smaller and lighter, and can be widely used in general business phones.

[Means for solving problems]

The present invention connects a first connection terminal that connects to a trunk circuit of a business phone, a second connection terminal that connects to a wireless communication device, and a call audio signal from the business phone to a wireless line, so that a call from the wireless line can be made. a circuit for transmitting a signal for activating the wireless communication device to the second connection terminal in response to a call signal arriving at the first connection terminal, in a wireless line connection device comprising means for connecting an audio signal to a business phone; and a voice detection circuit that detects that the level of the call voice signal from the business phone arriving at the first connection terminal is equal to or higher than a predetermined value, and the output of the voice detection circuit is connected to the second connection terminal. It is characterized by being connected to the press talk control circuit.

It is preferable to include an incoming call detection circuit that detects an incoming call from a wireless line arriving at the second connection terminal and outputs it as a connection request signal to the first connection terminal.

The signal for activating the wireless communication device is preferably a signal for activating the power source of the wireless communication device.

Preferably, the signal that activates the wireless communication signal is a signal that sets the wireless communication device to an off-hook state.

Preferably, the wireless communication device is a device connected to a disaster prevention wireless communication network.

[For production]

INDUSTRIAL APPLICABILITY The present invention can be connected to a connector between a general business phone and a wireless communication device.

In the case of a simplex call using the press talk system, first, activation of the business phone is detected, each circuit is operated, and the level of the call audio signal from the business phone is detected. Based on this detection output, the voice switch circuit means for switching between the transmitting channel and the receiving channel is configured to activate the pre-talk control circuit of the wireless communication device when the transmitting channel is set. Ru.

Furthermore, switching between simplex (half-duplex communication mode) and duplex (full-duplex communication mode) wireless communication is performed by selecting whether or not to automatically operate the voice switch circuit means using the wireless state detection means. It can be carried out.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of the present invention. In Figure 1, trunk circuit 1 of a business phone
0 is connected to the input of the transmitting amplifier 21, the output of the receiving amplifier 22, and the trunk activation detection circuit 31. The output of the transmission amplifier 21 is connected to the transmission circuit via the audio detection circuit 23 and the MIC terminal of the wireless communication device 40 . The first output of the voice detection circuit 23 is transmitted to the wireless communication device 4
The second output is connected to the first input of the receiving amplifier 22 through the PT terminal of 0 to a pre-talk (PT) control circuit. A second input of the receiving amplifier 22 or a monitor speaker 33 is connected to the sp terminal of the wireless communication device 40 via the switch circuit 32 . The switching signal input terminal of the switch circuit 32 is connected to the trunk activation detection circuit 3.
1 output is connected. In addition, the trunk activation detection circuit 3
The power supply [ON J signal of each circuit is taken out from the output of 1. The transmitting amplifier 21, the receiving amplifier 22, and the voice detection circuit 23 constitute the voice switch circuit means 20.

This embodiment is an example of a wireless line connection device applied to connection between a wireless communication device and a business phone using the press talk method.

When making a call from a business phone (extension phone) to a wireless line, the outgoing signal from the business phone is sent to the trunk circuit 1.
0 to the trunk activation detection circuit 31. Trunk activation detection circuit 31 that detected a business phone call
turns on the power of each circuit and starts the wireless communication device 40. Further, the switch circuit 32 is switched to connect the sp terminal of the wireless communication device 4o and the receiving amplifier 22.

At the time of transmission, the voice detection circuit 23 detects the transmitted voice of the business phone, and the press talk (PT) of the wireless communication device 40 is detected.
Sends a signal to activate the circuit and put it into a transmitting state. The audio signal is sent to the wireless communication device 40 via the transmission amplifier 21.
is sent to the transmitting circuit.

The reception amplifier 22 is controlled so as not to operate when the level of the call voice signal from the business phone detected by the voice detection circuit 23 is above a predetermined value, and to operate when the level is less than a predetermined value. Therefore, the receiving amplifier 22 operates in a state where no voice is being transmitted, and the received voice is transmitted to the business phone via the trunk circuit 10.

A voice switch circuit means 2 comprising such a transmitting amplifier 21, a receiving amplifier 22, and a voice detecting circuit 23.
0 allows stable operation through voltage comparison and enables good communication.

In the case of an incoming call from a wireless line to a business phone, the call is confirmed by the monitor speaker 33 and answered by operating the corresponding line button on the business phone.

After that, you can make a call using the press talk method in the same way as when making a call.

The wireless line connection device of the present invention, the trunk circuit IO of the business phone, and the wireless communication device 40 are connected by a connector method. Therefore, its versatility can be greatly improved.

FIG. 2 is a block diagram showing a second embodiment of the present invention.

In this example, the wireless communication method is simplex (half-duplex communication mode).
or duplex (full-duplex communication mode), and if it is a simplex wireless communication method, the voice switch circuit means shown in the first embodiment is used. Features.

In FIG. 2, a control circuit 34, a trunk activation detection circuit 35, and an incoming call detection circuit 36 are connected to the trunk circuit IO of the business phone. Wireless communication 1) The device 50 includes:
An incoming call detection circuit 36 and a wireless state detection circuit 37 are connected via a switching control circuit 60. The audio switch circuit means 20 are inserted between the trunk circuit 10 and the switching control circuit 60 via switch circuits 38, 39. The switch circuits 38 and 39 switch whether the voice switch circuit means 20 is inserted into the communication path or bypassed. The control output of the control circuit 34 connected to the trunk activation detection circuit 35 and the radio state detection circuit 37 is connected to the switching signal input terminal of the switch circuit 39 and to the audio switch circuit means 20. Further, a power "on" signal for each circuit is extracted from the output of the trunk activation detection circuit 35. A wireless telephone MSt61 of the wireless communication device 50 is connected to the switching control circuit 60.

When making a call from a business phone to a wireless line, a call signal from the business phone is input to the trunk activation detection circuit 35 via the trunk circuit 10. The trunk activation detection circuit 35 that detects the business phone call turns on the power of each circuit. At this time, the wireless state detection circuit 37
The state of the wireless communication device 50 is detected, and the control circuit 34 determines whether connection is possible.

If connection is not possible, a busy tone (BT) is sent to the business phone.

If the connection is possible, the control circuit 34 connects to the wireless state detection circuit 3.
7, the activation signal for the wireless communication device 50 is sent out. The wireless status detection circuit 37 also receives a dial tone (PDT) from the wireless communication device 50 and sends it to the business phone via the control circuit 34 and trunk circuit 10. The business phone confirms this dial tone (PDT) and dials the other party's number to establish a connection.

To switch the transmission/reception mode, the state of the signal received by the radio state detection circuit 37 (simplex or duplex) is detected, and in the case of simplex, the switch circuits 38 and 39 are connected to the voice switch circuit means 20 side, and the communication path is switched. voice switch circuit means 20 of
and performs communication using the press talk method shown in the first embodiment. During duplex operation, the switch circuits 38 and 39 are switched to bypass the voice switch circuit means 20.

By using a photocoupler for detecting the state of the wireless state detection circuit 37, it is possible to avoid an influence on the wireless communication device 50.

In the case of an incoming call from the wireless line to the business phone, the incoming call detection circuit 36 detects it and sends an incoming call indication signal to the business phone via the trunk circuit 1°.

The trunk activation detection circuit 35 detects the response of the business phone (off-hook, pressing the line capture button), the wireless status detection circuit 37 detects the type of incoming call (simplex, duplex, = simultaneous),
The control circuit 34 sets a corresponding communication path.

In addition, while using the wireless communication device 5o from a business phone,
When the wireless telephone 61 housed in the wireless communication device 5o is taken off-hook via the switching control circuit 60, the call is forcibly switched from the business phone to the wireless telephone 61.

〔Effect of the invention〕

As explained above, the wireless communication connection device of the present invention enables connection between a business phone and a wireless communication device, and can expand the communication functions of the business phone. Therefore, since there is no need to operate the business phone and the wireless communication device separately, the operation is simple and the efficiency of administrative work can be improved.

Further, the wireless communication connection device of the present invention has compatibility with which it can be connected to a general business phone, and also has the versatility of being able to automatically set a simplex or duplex call path depending on the wireless state.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention. FIG. 2 is a block diagram showing a second embodiment of the present invention. lO...Trunk circuit, 20...Audio switch circuit means, 21...Transmission amplifier, 22...Reception amplifier, 23...Audio detection circuit, 31.35...Trunk activation detection circuit , 32.38.39... Switch circuit, 33... Monitor speaker, 34... Control circuit, 3
6... Incoming call detection circuit, 37... Radio status detection circuit,
40.50...Radio communication device, 6o...Switching control circuit, 61...Radio telephone.

Claims (6)

[Claims] (1) A first connection terminal that connects to the trunk circuit of the business phone, a second connection terminal that connects to a wireless communication device, and a call audio signal from the business phone that connects to a wireless line, and a call audio signal from the wireless line. a circuit for transmitting a signal for activating the wireless communication device to the second connection terminal in response to a call signal arriving at the first connection terminal; , a voice detection circuit that detects that the level of the call voice signal from the business phone arriving at the first connection terminal is equal to or higher than a predetermined value, and the output of the voice detection circuit is connected to the second connection terminal. A wireless line connection device characterized in that it is connected to a press talk control circuit. (2) Claim 1, which includes an incoming call detection circuit that detects an incoming call from a wireless line arriving at the second connection terminal and outputs it as a connection request signal to the first connection terminal. Wireless line connection device. (3) The wireless line connection device according to claim (1), wherein the signal for activating the wireless communication device is a signal for activating the power source of the wireless communication device. (4) The wireless line connection device according to claim (1), wherein the signal for activating the wireless communication signal is a signal for setting an off-hook state of the wireless communication device. (5) The wireless line connection device according to claim (1), wherein the wireless communication device is a device connected to a disaster prevention wireless communication network. (6) The wireless line connection device according to claim (5), wherein the wireless communication device is a device that can establish a line connection using a PB signal arriving at the first connection terminal.