JPS59119954A - Switching device of telephone circuit - Google Patents

Abstract

PURPOSE:To provide the functions of calling and call out a subscriber of the remote side, etc. with no intervention of a handset to a facsimile terminal having a telephone set containing a loud speaking function, by enabling the facsimile terminal to control the working and release of a switch circuit via a control circuit. CONSTITUTION:A telephone circuit 10 is set outside a facsimile terminal 20, and a telephone circuit 30 is shared by the circuit 10 and the terminal 20. When a call is given from the telephone of the remote side, a signal current flows through a route of the circuit 30, a switch contact 22, a capacitor, a rectifier 13, contacts rl2 and HS1, a tone ringer circuit 11, the rectifier 13 and a switch contact 22'. Then the circuit 11 works to produce a ringing tone. When a handset is picked up, the contact HS1 opens to cut off the circuit 11. Then switches SH2 and SH3 are closed to form circuits of telephone receivers T and R. Thus the talking is possible with the remote side subscriber, and the contacts 22 and 22' are switched to the FAX side with facsimile reception to obtain a FAX reception state.

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 non-audience voice reception.

Prior Art and Problems A facsimile terminal is equipped with a telephone, and when transmitting a fax, the telephone calls the other party, and in response, the facsimile terminal of the other party becomes ready to receive data and then begins transmission. 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 changeover switch, but some telephones are built into the facsimile machine. In addition to the usual handset and handset, 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 switches to the sound amplification side by operating a telephone key called a speaker inch, and returns to the non-audience 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 as described above, by devising the control relay of the switching circuit, it is possible to call the other party without picking up the handset, or to receive an amplified call after a Fasox transmission. It is easy to automatically switch to

OBJECTS OF THE INVENTION The present invention focuses on the above points, and makes a call to a facsimile terminal having a telephone with amplification function without going through a handset by devising a switching control circuit.

It attempts to provide various functions such as receiving a call and calling the other party after sending a fax.

Composition of the Invention The present invention relates to a circuit switching device for a telephone that is connected to a telephone line together with a facsimile terminal and has a function of amplified reception, in which a contact point and amplification system are installed in parallel to a hook inch of the telephone to close a loop to the telephone line. a switching circuit having a circuit switching contact to the device, a circuit for controlling the operation and recovery of the switching circuit, and a circuit for notifying the facsimile terminal whether the switching circuit is in operation or in recovery; This feature is characterized in that the operation and recovery of the switching circuit can be controlled through the switch, and this will be explained in detail below with reference to the illustrated embodiment.

Embodiment of the Invention The drawing shows 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 and a transmitter T, a tone ringer circuit 11 that rings a bell, and a hook inch H3+ that is linked to the off-hook and on-hook of the handset. H3a, etc., but this device also includes a loudspeaker amplifier 12 for loudspeaker reception, and a speaker S.
P, a relay RL for switching, a speaker switch spsw, etc. Di is dial-in contact, D
S is a shunt contact when dialing, L is an inductance that constitutes a hybrid, and 13 is a full-wave rectifier circuit.

Press the speaker switch spsw to close it, then press All (!
It is a self-recovery type that opens when the flip-flop circuit I4 opens and provides an input to the clock terminal CK of the flip-flop circuit I4. Flip-flop circuit 14
changes the Q output to 1 every time human power is applied to the clock terminal CK.
``0'', ``1'', etc., and performs a so-called binary operation.Also, when there is an input to the reset terminal R, the Q output is set to ``0''.
“Forcibly reset to ”.

The Q output of flip-flop 14 drives relay RL via inverter 17. This relay RL has transfer contacts rβ+, rl12 and a meter contact rβ3, contact r7!1 is inserted into the circuit of the transmitter T and speaker SP, and the contact rl! 2 is connected in parallel with the foot switch H32, and the contact rl13 is connected in parallel with the hook switch H33. The illustrated state is in standby for non-audience reception, and relay RL
is turned off, and its contact r7!1 is connected to the transmitter T side. Also, since the hand center (not shown) is on-hook, the hook switch H3+ is closed and the calling signal is
- It is designed to be guided to the ringer circuit 11.

When you take the handset off the hook in this state, hook switch H8l opens and H32°H33 closes.
Sent between telephone line 30.

A closed loop is formed including handsets T and R, which is detected by the exchange and a dial tone is returned. In this state, if a dial (not shown) is operated, the contact Di turns on and off, and the other party's telephone is called. The reset terminal of the flip-flop circuit 14 is connected to the output terminal of a NiHOR gate 15, and one input of this OR gate is connected to a pulse generation circuit consisting of a switch H34 and an RC circuit, and the other input is connected to a pulse generation circuit through an inverter 16. Communication switch 2
1 is connected. Further, in the present invention, a communication line 41 for informing the terminal 2o of the state 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 phone, one line 3
0, switching contact 22, capacitor C (1, rectifier 13, contact γj22, H3+, 1-) A signal current flows through the path of ringer circuit 11, rectifier 13, and switching contact 22', and tone ringer circuit 11 operates to produce a ringing sound. When the handset is picked up, hook switch H3+ opens, disconnecting tone ringer circuit 11, and hook switches H32 and H3 open.
3 is closed and sent, forming a circuit for receivers T and R. This makes it possible to talk to the other party, and in the case of facsimile reception, the contacts 22 and 22' are switched to the facsimile side and the facsimile reception state is established. The call to the other party's phone is as described above.
These are the sending and receiving operations of distant lightning.

When receiving a loudspeaker, close the speaker switch spsw. As a result, the Q output of the flip-flop 14 becomes "1", the output of the inverter 17 becomes L (low) level, and therefore the relay RL is energized to switch the relay contact r12 to the speaker side and close the relay contact rβ3. At this time, the remaining relay contacts rβ1 are 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 loudspeaker mode when making a call instead of when receiving a call from the other party/Sendset 1-
It is possible to make on-footer transmissions while leaving the camera in place. This is relay contact rl+, r (13 is hook switch H32, H
It is clear from the fact that 33 is substituted.

The procedure for this on-hook communication is as follows.

First, when the speaker switch spsw is turned on and the flip-flop 14 is turned on, the relay RL is driven and the contact rjl! 2. rβ3 closes. In this state, the contact Di opens and closes intermittently to dial the number of the other party), and the facsimile terminal of the other party responds by dialing 2100.
When a Hz CHD is returned (when automatically received), a continuous beeping sound of 2100 Hz is output from the speaker SP.

When the operator hears this continuous tone, he switches the switch 22, 22' of the terminal 20 to the fax side, thereby starting transmission. At this time, the communication switch 21 is also closed, and the ON information of this switch 21 is led to the reset terminal of the flip-flop 14 through the inverter 16 and the OR gate 15, thereby resetting the flip-flop 14. This makes it possible to turn off relay RL and automatically return telephone circuit 10 to a standby state without amplification. Thus, according to this circuit, fax transmission can be started by simply pressing the speaker switch spsw without picking up the telephone.

The state of the switching circuit is always notified to the facsimile terminal 20 via the communication line 41. Furthermore, the facsimile terminal 20 can set and reset the flip-flop 14 using the control line 42 to operate and restore the switching circuit, that is, the relay RL and its contacts.

Therefore, if the switching circuit of the facsimile terminal is restored at the end of the communication, for example, the facsimile terminal activates it to enter the loudspeaker receiving state.
You can do things like broadcast audio from the other party's phone.

This is effective for notifying the receiving party of the completion of reception, and for communicating with them if there is any information. This 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.
Both are easy to do.

Incidentally, the resetting of the flip-flop 14 is also performed by turning off the hook switch HSa, that is, by turning off the hook of the hand center. 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 receiver will be placed on the receiver.

This can be done with R. Also speaker switch spsw
By operating again, the flip-flop is 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. Note that the contacts 22 and 22' are network control contacts that connect either the telephone circuit 10 or the facsimile terminal 20 to the telephone line 30, so even after the end of the call by the terminal 20, the handset can be off-hook or the speaker switch can be switched off. 5PS
If you operate W to enter the loudspeaker reception state, and in this state switch the contacts 22 and 22' to the telephone circuit 10 side, the line with the other party will be maintained, allowing you to have a meeting with the other party after sending and receiving FANOX, etc. can be done. 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 to receive a call, then touch the contact 22.
22' may be switched to the telephone circuit 10 side.

Effects of the Invention As described above, according to the present invention, the speaker switch s
The control line 42 from the psw and facsimile terminal creates an off-hook state for loudspeaker reception, and this state can be released by pressing the communication switch, etc., so on-hook calling and on-hook communication of the terminal are possible, and when terminal communication ends, Advantages such as being able to call the operator in a loudspeaker reception state are obtained.

[Brief explanation of drawings]

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 receiver, RL is a relay for the amplification/non-address switching circuit, γl is its contact, spsw is a switch that controls the operation and recovery of the switching circuit, and 14 is the same. Flip-flop, 20 is a facsimile terminal, 41 is a circuit for notifying the state of the switching circuit, H3
“is Fusokuisoji. Applicant Minoru Aoyagi, Fujitsu Limited Representative Patent Attorney

Claims (1)

[Claims] In a circuit switching device for a telephone that is connected to a telephone line together with a facsimile terminal and has a loudspeaker reception function, there is a contact that is installed in parallel with the hook switch of the telephone to close the loop to the telephone line, and a circuit switching contact for the loudspeaker. a switching circuit, a circuit for controlling operation and recovery of the switching circuit, and a circuit for notifying a facsimile terminal whether the switching circuit is in operation or in recovery; , a telephone circuit switching device characterized in that recovery can be controlled.