JPS63158945A - Radio transfer telephone system - Google Patents

Abstract

PURPOSE:To enable communication to be performed over a wide range, by connecting the titled system to a telephone line and the radio equipment of a base station, and enabling a call between a mobile radio station and a telephone set to be performed. CONSTITUTION:From an input terminal on one side of the titled system, a call signal from the telephone line is inputted through a capacitor, a resistor 3, diodes 4 and 5, and constant voltage diodes 6 and 7. And when the call signal is inputted, a pulse corresponding to the call signal operates a photocoupler from the output of a comparator 8, then, the call signal is detected. Now, in a case when a change-over switch 12 is connected to an automatic start side, the output of an IC14 is set at a high level, and the output of an FFIC16 is set at a low level, and an FFIC17 waits the completion of the output pulse of an FFIC15. During a waiting time, the pulse produced by a multi-IC18 being operated at the leading edge of the output pulse of the IC14 turns ON a TR20 via an IC19, and produces a press-to-talk signal, and performs transmission from the radio equipment of the base station to a mobile radio equipment.

Description

[Detailed Description of the Invention] As shown in Fig. 3, the connection method for this device is such that the base station radio and the telephone are ready-made and do not require any modification.

Connect the base station radio to the microphone terminal with a special cable,
Connect to the speaker terminal with a speaker cable.

In addition, the telephone line is connected from the rosette terminal with a parallel cable.

The schematic configuration of this device is as shown in FIG. 4, and will be explained below.

When the changeover switch is set to the automatic start side, when a telephone ring tone (161K) is input from the telephone line, the ring signal detection circuit detects the ring signal and generates a line connection signal via the automatic/manual switching circuit. The circuit creates a line connection signal (line on signal).

By closing relay (A), the telephone line is connected.

When a telephone line is connected, the voice of the telephone is transmitted through the base station radio, or the voice from the speaker terminal of the base station radio that has received the radio waves transmitted by the mobile station is transmitted to the telephone line. A call (one-way call switching method) is started by inputting the number.

Switching of the relay (B) during a call is done by inputting the voice during a call to a silent time timer circuit that determines the end of a passage of one episode via an audio signal filter,
When the voice control method (box method) switches the relay (B), the other party of the call can start speaking.

To end the call, the telephone side hangs up the receiver, and the off-hook signal (400) h) from the telephone am is waveform-shaped via an off-book signal filter.

After further determination by the line disconnection determination circuit, relay (A) is opened to disconnect the telephone line.

Also, when the selector switch is set to the manual start side.

The telephone line is not automatically connected by a telephone ringing signal, and the person at the base station can confirm the wireless communication path in advance.After picking up the receiver and connecting the telephone line, the manual start switch must be pressed once. By turning it on, a conversation begins between the mobile station and the telephone side (calling side).

Further, if the base station makes a call, calls the called party, connects the telephone line, and then turns on the manual start switch once, a conversation between the mobile station and the called party is started.

If the person at the base station does not want to join the conversation, put the base station handset back.

The detailed configuration is as shown in FIG. 5, and the base station radio in the illustrated embodiment described below is an example of a personal radio.

An overvoltage suppressing element varistor (1) is provided at the input terminal connected to the rosette terminal of the telephone line by a parallel cable to protect the device from an unexpected overvoltage.

From one input terminal, capacitor (2), resistor (3),
Diode (4), (5), constant voltage diode (6)
, (7) to input the calling signal from the telephone line.

When there is no calling signal, the constant voltage diode (6) is cut off, so the output of the comparator (8) does not output a pulse, but when the calling signal is input, the output of the comparator (+1) A pulse corresponding to a calling signal (161k) operates a photocoupler (9), and the calling signal is detected by a monomulti IC (11) and a counter IC (1G) that determine accurate pulse width. When the telephone line is disconnected (relay (A) is open), a photocoupler (9) provides electrical insulation between the telephone line and this machine. When the selector switch (!2) is set to the automatic start side, the Blip Prop (hereinafter simply referred to as F, F) IC (14) is activated via the IC (13) that determines this.
Set the output to high level, and then connect the mono multi-IC (1
5), F and F are activated by the rising edge of one of the output pulses.

Set the output of IC (16) to low level, F, F, IC
(17) is released from the reset state, and the mono multi-IC (1
5) The end of the other output pulse is F, F, IC (1
7) waits, within this waiting time, F, F, I C(1
4) A monomulti IC (
The pulse generated by step 18) turns on the transistor (20) via the IC (19), creates a PTT (press talk) signal, and transmits it from the base station radio to the mobile station radio, thereby transmitting the signal to the mobile station radio. The communication route is secured.

When the output pulse from the mono multi IC (15) ends, the output of one of the F, F, and IC (17) becomes high level at the rising edge of this pulse, and the mono multi IC (44).

(27) and (30) are released from the reset state, and the other low level output is inverted by rc (21) to turn on the transistor (22), close the relay (A) and turn on the telephone line. The 1 line on LED (light emitting diode) is lit. When the telephone line is turned on, the voice input from the speaker of the base station radio that receives the radio waves transmitted from the mobile station is output to the telephone line via the line transformer T1, and the telephone conversation begins. . On the other hand, this audio is transmitted through the operational amplifiers (23), (24), (
25) and the surrounding resistors and capacitors, the signal passes through nine audio signal filters and operates a comparator (26).

The output pulse of the comparator (26) is
2)) If the audio signal input to (9) is interrupted for more than the time set by the resistor (29) and capacitor (28) (approximately 2 to 3 seconds), the signal will be interrupted for the time set by the mono multi-IC (30).
An oscillation circuit made up of ICs (31), (32), and (33) and surrounding resistors and capacitors outputs a switching signal sound to the line transformer T1. At this time, Mono Multi I
With the output pulse of C (27), a pulse is output from the monomulti IC (37) and the transistor (38) is turned on.

To prevent the comparator (26) from outputting a pulse due to a switching signal sound or momentary noise. At the rising edge of the end of the monomulti tc (30) pulse, F, F, and IC (34) operate,
IC (35), transistor (36) on one output
Relay (B) by the audio signal switching circuit composed of.

At the same time as switching to the side that inputs the phone's audio, press F.

F, the other output of IC (34), IC (19)
, creates a PTT signal through the transistor (20), and f
The voice from the first talk line is input to the microphone terminal of the base station radio via relay (C), and the voice is switched to transmission on the telephone side.

When the telephone side finishes a section of the story, a similar signal flow occurs,
This time, the mobile station's audio is switched to the side where it is input from the speaker 1 terminal, and the mobile station starts transmitting, so the mobile station's audio is output from the speaker 1 terminal to the telephone line, which repeats 0 or more times. Thus, a one-way call is made.

If the selector switch (!2) is on the manual start side.

The calling signal of the telephone line is not output after IC (13), and only by turning on the manual start switch once, IC (13) outputs a pulse, and as mentioned above, relay (A
) is closed and the line is turned on.

When the telephone call ends and the telephone receiver hangs up, an off-hook signal (4001k) is input from the telephone line.

This signal is detected by an off-hook signal filter consisting of operational amplifiers (39), (40), (41) and surrounding resistors, capacitors, etc., and a pulse is output by a comparator (42), and a monomulti IC ( 43).

Determine the accurate pulse of 400 wires using mono multi ICs (43) and (44), input it to counter IC (45),
This pulse is generated once during off-hook signal oscillation, and the IC (4
6), the intermittent cycle of the off-hook signal by the monomulti ICs (47) and (48) is determined, and the IC (49)
The counter IC (5G) counts pulses for several seconds through the IC (51), and the line-off pulse is F.

F, output to IC (16). For this reason, F, F, IC (
The output of IC (16) becomes high level, and IC (17) is reset, so that one high level output becomes IC (17).
21), turning off the transistor (22),
Relay (A) is opened and one line is turned off. Also, F.

F.1. Monomulti IC (52), which is activated by the rising edge of the output pulse of C (16), outputs a pulse for a set time and outputs a pulse to F, F, IC (1) via IC (53).
4).

(34) and return the device to its initial state.

At the same time, the transistor (54) outputs a reset signal to return the base station radio to its initial state.

The other output of the counter IC (45) counts the initial continuous oscillation signal (400Hz) of the off-hook signal and sends the line-off pulse to F, F via the IC (51).
, to the IC (16) to turn off the line and return the device and the base station radio to their initial states, as described above.

Note that the audio signal also passes through an off-book signal filter,
A pulse is output from the comparator (42).

Since the above-described waveform shaping and line determination circuit does not operate, malfunctions such as line disconnection due to voice during one call do not occur.

Automatic start and manual start operations are indicated by each LED.
The IC (13) makes a determination based on this.

By turning on the reset switch once.

When the telephone line is disconnected and the machine is forcibly returned to its initial state, the ICs (55) and (56) perform the same operation as a reset switch when the machine is powered on.

The PTT switch is used to forcibly transmit radio waves from the base station radio.

As described above, a conversation can be made between the mobile station and the caller (or callee), but the callee (or caller) can also join in on the base station's phone or operate the base station radio. It is also possible to make calls, and if two units are used, it is possible to communicate between distant mobile stations using the telephone line in the middle, and the communication range as a mobile radio telephone is wide. Moreover, since it can be applied to all radio equipment, its range of use is very wide.

[Brief explanation of the drawing]

1 and 2 show examples of how this device is connected, FIG. 3 shows how to connect this device, FIG. 4 is a block diagram of this device, and FIG. 5 shows an embodiment of the present invention. It is a circuit diagram.

Claims (1)

[Claims] (1) By connecting a telephone line and a base station radio (hereinafter simply referred to as a base station) to this device, communication between a mobile radio station (hereinafter simply referred to as a mobile station) and a telephone is possible. A wireless transfer telephone device that is capable of making calls. (See Figure 1) (2) The mobile station is automatically called by a calling signal from the calling party (hereinafter simply referred to as the calling party), and a call is started. The wireless transfer telephone device according to item 1. (3) In response to a calling signal from the calling side, the receiver of the base station is picked up, the mobile station is manually called, and a conversation is started between the calling side and the mobile station. The wireless transfer telephone device according to item 1 or 2. (4) Calling the other party (hereinafter simply referred to as the called party) from the base station phone (calling party), manually calling the mobile station, and starting a conversation between the called party and the mobile station. A wireless transfer telephone device according to any one of claims 1 to 3, characterized in that: (5) The wireless transfer telephone device according to any one of claims 1 to 4, characterized in that a communication can be made between three parties: a mobile station, a call originator, and a call recipient. (6) If you use two units of this device, you can connect mobile stations across the country.
Alternatively, the wireless transfer telephone device according to any one of claims 1 to 5, characterized in that a call can be made between four parties by adding a calling party and a receiving party. (See FIG. 2) (7) The wireless transfer telephone device according to any one of claims 1 to 6, characterized in that the communication method is a one-way call switching (press talk) method. (8) When the voice on the telephone side is interrupted for a certain period of time, the telephone side enters the receiving state, and then when the mobile station finishes speaking, it returns to the transmitting state.It is a switching control (box) method using an audio signal. A wireless transfer telephone device according to any one of claims 1 to 7. (9) Claims 1 to 8, characterized in that when the telephone conversation ends and the telephone receiver is returned, the telephone line is automatically disconnected and the base station radio is also returned to its initial receiving state. A wireless transfer telephone device according to any of the above. (10) Wireless transfer according to any one of claims 1 to 9, characterized in that the wireless device to be connected can be applied to various types of wireless devices such as personal radio, amateur radio, business radio, simple radio, etc. Telephone device. (11) The wireless transfer telephone device according to any one of claims 1 to 10, wherein the telephone to be connected can be applied to various terminal telephones such as analog, digital, dial, and push telephones.