JPS6322752B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a telephone circuit switching device that performs amplification of a telephone that is connected to a telephone line together with a facsimile terminal and is capable of amplified voice reception, and switches to a non-acoustic voice reception.

Prior Art and Problems A fax machine is equipped with a telephone, and when sending a fax, the telephone calls the other party.
In response to this, the other party's facsimile terminal becomes ready to receive data and starts transmitting. The telephone is generally provided separately from the facsimile machine and is simply connected to the same telephone line together with the facsimile machine via a switch, but some telephones are built into the facsimile machine. In addition to the usual handset and receiver, there are also some that are equipped with a speaker and can receive amplified calls. A telephone equipped with a loudspeaker reception function capable of outputting a received voice from a speaker includes a circuit for switching between loudspeaker reception using the speaker and non-audience reception using a normal handset. This switching circuit is switched to the amplification side by operating a telephone key called a speaker switch, and is returned to the non-amplification side by operating the telephone key again.

In systems where a telephone with a switching circuit and a terminal (facsimile terminal) use a common telephone line, the control relay of the switching circuit can be devised to make it possible to call the other party without picking up the handset, or to receive audible calls after fax transmission. It is easy to automatically switch to

Purpose of the Invention The present invention focuses on such points, and includes:
An attempt is made to improve the switching control circuit to give a facsimile terminal equipped with a telephone with amplification functions various functions such as making a call without going through a handset, receiving a call, and automatically switching to the amplified handset state after fax transmission. It is.

Structure of the Invention The present invention provides switching contacts 22, 2 to the telephone line 30.
2' with a facsimile device,
Speaker switch SPSW is used in circuit switching equipment for telephones with receivers R and T and speaker SP.
The flip-flop 14 is set and reset each time a signal is input from the fax machine or from the facsimile device through the signal line 42, and energizes the relay RL when set and deenergizes the relay when reset. First switching contact of relay
rl ₁ is connected to the transmitter and the loudspeaker amplifier 12 so that when the relay is de-energized, the transmitter is connected to the circuit, and when the relay is energized, the loudspeaker amplifier is connected to the circuit, and the second switching contact
The tone ringer circuit 11 is connected to the circuit when the relay is de-energized and on, by connecting rl ₂ in parallel with the switch HS ₂ , which closes with the off-hook in front of the dial contact Di, and in series with the switch HS ₁ , which opens with the off-hook. This will be described in detail below with reference to the illustrated embodiments.

Embodiment of the Invention The drawings show an embodiment of the present invention, which is a facsimile terminal with a built-in telephone circuit, but for convenience of explanation, the telephone circuit 10 is shown outside the facsimile terminal 20. 30 is a telephone line shared by these. The telephone circuit 10 includes a normal receiver R, a transmitter T, and a tone ringer circuit 1 for ringing a bell.
1. The device is equipped with switch switches HS ₁ to HS ₄ that are linked to the raising (off-hook) and lowering (on-hook) of the handset, but this device also includes a loudspeaker amplifier 12 for loudspeaker reception, a speaker SP, It is equipped with a relay RL and a speaker switch SPSW for switching. Di is dial-in contact, DS is shunt contact when dialing,
L is the inductance that constitutes the hybrid, 1
3 is a full wave rectifier circuit.

The speaker switch SPSW is a self-recovery type that closes when pressed and opens when released, and provides input to the clock terminal CK of the flip-flop circuit 14. The flip-flop circuit 14 changes the Q output to "1", "0", "1", etc. every time an input is input to the clock terminal CK, so to speak.
Performs forward movement. Further, when there is an input to the reset terminal R, the Q output is forcibly reset to "0". The Q output of flip-flop 14 drives relay RL via inverter 17. This relay RL has transfer contacts RL ₁ , RL ₂ and make contacts RL ₃ .
The contact rl ₁ is inserted into the circuit of the transmitter T and the speaker SP, the contact rl ₂ is connected in parallel with the switch HS ₂ , and the contact rl ₃ is connected in parallel with the switch HS ₃ . The state shown is when the relay is on standby for non-address reception.
RL is turned off, and its contact rl ₁ is connected to the transmitter T side. Since the handset (not shown) is also on-hook, the switch _HS1 is closed so that a ringing signal is guided to the tone ringer circuit 11. When you turn off the handset in this state, the switch HS ₁ opens and
Since HS ₂ and HS ₃ are closed, a closed loop including transmitting and receiving handsets T and R is formed with the telephone line 30, which is detected by the exchange and a dial tone is returned.
In this state, if you operate the dial (not shown), the contact will be made.
Di turns on and off, and the other party's phone is called. The reset terminal of the flip-flop circuit 14 is connected to the output terminal of an OR gate 15, and one input of this OR gate is connected to a flip-flop circuit.
A pulse generating circuit consisting of HS ₄ and an RC circuit is connected to the other input, and a communication switch 21 is connected via an inverter 16 to the other input. Furthermore, in the present invention, the terminal 20
A communication line 41 for notifying the status of the switching circuit and a control line 42 for causing the terminal 20 to operate the switching circuit are provided.

In this circuit, when there is a call from the other party's telephone, the line 30, switching contact 22, capacitor C ₀ ,
A signal current flows through the path of the rectifier 13, the contacts rl ₂ , HS ₁ , the tone ringer circuit 11, the rectifier 13, and the switching contact 22', and the tone ringer circuit 11 operates to generate a ringing tone. When the handset is picked up, the hook switch HS ₁ opens and disconnects the tone ringer circuit 11, and the hook switches HS ₂ and HS ₃ are closed and sent.
Form the circuits for handsets T and R. This makes it possible to communicate with the other party, and in the case of facsimile reception, the contacts 22 and 22' are switched to the facsimile side to enter the facsimile reception state. The calling of the other party's telephone is as described above. These are normal sending and receiving operations.

Close the speaker switch SPSW when receiving a loudspeaker. As a result, the Q output of the flip-flop 14 becomes "1", and the output of the inverter 17 becomes L (low).
level and thus relay RL is energized to switch relay contact rl ₂ to the speaker side and close relay contact rl ₃ . The remaining relay contact _rl1 is then switched to the loudspeaker amplifier 12 side to form a power supply path to the amplifier. In this state, the received voice is amplified and output from the speaker SP. If you use the above-mentioned amplification state when making a call rather than when receiving a call from the other party, you can make on-hook calls while leaving the handset on. This means that relay contacts RL ₂ and RL ₃ are switch HS ₂ and HS _3.
It is clear from the fact that .

The procedure for this on-hook communication is as follows. First, turn on speaker switch SPSW and set flip-flop 14, then relay RL
is driven and contacts RL ₂ and RL ₃ close. In this state, when you dial the number of the other party (contact Di opens and closes intermittently) and the other party's facsimile terminal responds and sends back a 2100Hz CED (when receiving automatically), the speaker The continuous beep sound of 2100Hz is output from the SP. When the operator hears this continuous sound, turn the switch 22,2 on the terminal 20.
2' is switched to the fax side, and transmission begins. At this time, the communication switch 21 is also closed,
The ON information of this switch 21 is transmitted to the inverter 16,
The reset terminal of the flip-flop 14 is led through the OR gate 15 to the reset terminal of the flip-flop 14.
Reset. This makes it possible to turn off relay RL and automatically return telephone circuit 10 to a standby state without amplification. In this way, with this circuit, you can turn on the speaker switch without picking up the phone.
Simply press SPSW to start fax transmission.

The state of the switching circuit is constantly notified to the facsimile terminal 20 by the communication device 41. Further, the facsimile terminal 20 is connected to the flip-flop 1 by the control line 42.
Set and reset 4 to switch circuit or relay.
RL and its contacts can be operated and restored.
Therefore, if the switching circuit is restored at the end of the communication, the facsimile terminal can activate the switching circuit to enter the loudspeaker receiving state and broadcast the audio from the other party's telephone. This is effective for notifying the receiving party of the completion of reception and for communicating any matters to be communicated over the phone. The switching circuit may be controlled by the facsimile terminal 20 using its own program, or by the other party communicating by facsimile message and the terminal 20 decoding it, and either can be easily executed.

The flip-flop 14 can also be reset by turning off the switch _HS4 , that is, by turning off the handset. Therefore, if you pick up the handset, even if the telephone is in amplification mode, it will return to the transmitter side, and from then on, the call will be transmitted and the receivers T and R
It can be done with Also speaker switch
By operating SPSW again, the flip-flop will be re-inverted and placed in the reset state, which can be used, for example, to abort a call when the other party does not respond. The contacts 22 and 22' are connected to the telephone line 30 by the telephone circuit 10 or the facsimile terminal 2.
Since this is a network control contact point that connects either one of the
If you operate the SPSW to enter the loudspeaker receiving state and switch the contacts 22 and 22' to the telephone circuit 10 side in this state, the line with the other party will be maintained and you can have a meeting with the other party after sending and receiving a fax. be able to. If you wish to disconnect the line after the communication by the terminal 20 is completed, leave the handset on-hook and do not use the loudspeaker, and then touch the contacts 22, 22'.
It is only necessary to switch to the telephone circuit 10 side.

Effects of the Invention As described above, according to the present invention, the speaker switch SPSW and the control line 42 from the facsimile terminal create an off-hook state in loudspeaker reception.
The state can be canceled by pressing the communication switch, etc., so on-hook calls and terminal on-hook communication are possible, and when the terminal communication is finished, it is possible to enter the loudspeaker state and call the operator. .

[Brief explanation of the drawing]

The drawing is a circuit diagram showing an embodiment of the present invention. In the figure, 10 is a telephone circuit, SP is a speaker, R is a telephone handset, RL is a relay for the loudspeaker/non-speaker switching circuit, RL is its contact, SPSW is a switch that controls the operation and recovery of the switching circuit, and 14 is the same. 20 is a facsimile terminal, 41 is a circuit for notifying the status of a switching circuit, and HS is a switch.

Claims (1)

[Claims] 1. In a circuit switching device for a telephone connected to a telephone line 30 via switching contacts 22, 22' together with a facsimile device and having transmitting and receiving receivers R, T and a speaker SP, signal line 4
A flip-flop 14 is provided, which is set and reset each time a signal from a facsimile device is input through 2, and energizes the relay RL when set and deenergizes the relay when reset. A switching contact rl ₁ is connected to the transmitter and the loudspeaker amplifier 12 so that when the relay is de-energized, the transmitter is connected to the circuit, and when the relay is energized, the loudspeaker amplifier is connected to the circuit; RL ₂ dial contacts
A lock switch that closes with the off-hook in front of Di.
A telephone circuit switching device characterized in that it is connected in parallel with HS ₂ and in series with a switch HS ₁ that opens when off-hook, so that when the relay is de-energized and on-hook, a tone ringer circuit 11 is connected to the circuit. .