JPH04159842A - Telephone set - Google Patents

Abstract

PURPOSE:To enable a calling subscriber to call a called subscriber even when the called subscriber does not hold the handset of his telephone set having no speech receiving loudspeaker function by producing a calling sound by utilizing the PH signal sound of the telephone set of the called subscriber while the called subscriber is talking with another subscriber. CONSTITUTION:A handset 1, telephone line 2, hook switch 3, push-button dial 4, switch 5, PB/RGT conversion circuit 6, switch 7, tone ringer 8, amplifier 9, and loudspeaker 10 are provided corresponding to a telephone line 101. When a calling PB signal sound is inputted from a calling subscriber waiting for the termination of the speech of the called subscriber with another subscriber, the PB signal sound is inputted to the PB/RGT conversion circuit 6 through the switch 5. When the calling signal is detected by means of the circuit 6, a calling signal is produced and outputted to the loudspeaker 10 from a tone ringer 8 after the signal is amplified by means of the amplifier 9. Therefore, a calling subscriber waiting for the termination of the speech of the called subscriber with another subscriber can easily call the called subscriber by issuing the PB signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to telephones, and particularly to telephones without a speaker receiving function.

[Conventional technology]

A conventional telephone without a speaker function has a handset 23 corresponding to a telephone line 103, as shown in FIG.
, a telephone circuit 24, a hook switch 25, a push button dial 26, a tone ringer 27, an amplifier 28, a speaker 29, and the like.

When the phone is not in use, the hook switch 25
is open, and when a call is received, a ringing signal is input via the telephone line 103, and the tone ringer 27 generates a predetermined ringing tone from the ringing signal and sends it to the amplifier 28.
Output to. This ringing tone is amplified by the amplifier 28 and outputted by the speaker 29. When the answerer picks up the handset 23 due to this ringing tone, the hook switch 2
5 is closed and the telephone circuit 24 is connected to the telephone line 103,
The call begins.

During a call, the other party's voice can be heard from the handset 23, and if the other party's telephone is a push-button dial telephone that dials using a PB signal tone, the PB signal tone can be heard when the other party presses the push button.

[Problem to be solved by the invention]

In the above-mentioned conventional telephones, when a person on a telephone call without a speaker-receiver function wants to wait for the other party by lifting the handset, the party being waited for must always hold the handset. I need to be there. In this case, the waiting time becomes long, and even if the party who is made to wait tries to call the party who is making him wait, the other party's voice is not heard until the party who is making him wait takes off the handset. They have the disadvantage of not being able to hear and respond to calls.

Furthermore, even if the person who is being made to wait takes off the handset or is forced to disconnect the phone, the person who is being made to wait will not be able to know this and will not be able to proceed smoothly. The disadvantage is that it is not possible to resume the call.

[Means for solving the story]

The telephone of the present invention is a telephone that does not have a speaker receiving function, and when a call is being made with the other party, it reproduces and outputs a PB signal tone for calling sent from the other party via the telephone line. means.

〔Example〕

Next, the present invention will be explained with reference to the drawings. FIG. 1 is a block diagram of a first embodiment of the present invention. As shown in FIG. 1, in this embodiment, corresponding to the telephone line 101,
Handset 1, telephone circuit 2, hook switch 3, push 12 button dial 4, switch 5, P B /
The device includes an RG'r conversion circuit 6, a switch 7, a tone ringer 8, an amplifier 9, and a speaker 10.

In FIG. 1, the functions of the handset 1, telephone circuit 2, hook switch 3, push button dial 4, tone ringer 8, amplifier 9, speaker 10, etc. are the same as in the conventional example shown in FIG. 3. . The switch 5 is a switch that receives the output of the push button dial 4 and opens only when the push button is pushed up to prevent the PB signal sound from going around to the tone ringer 8.
The /RGT conversion circuit 6 is a circuit that detects the received PB signal tone and generates a calling signal. Also, switch 7
operates in conjunction with the hook switch 3, and when the hook switch 3 is in the open state, it is in contact with the a contact side,
In the open state, it is in contact with the 5th node side.

When the telephone is not in use, the hook switch 3 is open, the switch 5 is open, and the switch 7 is in contact with the a contact. When receiving a call, a calling signal input from the telephone line 101 is input to the tone ringer 8 via the a contacts of the switch 5 and the switch 7. In the tone ringer 8, a ringing tone is generated from the ringing signal, and this ringing tone is input to an amplifier 9, amplified, and sent to a speaker 10 for output.

When the answerer picks up the handset 1 due to the ringing tone, the hook switch 3 engages and the telephone circuit 2 switches to the telephone line A10.
1, the switch 7 is brought into contact with the B contact side in conjunction with the operation of the hook 3, and a call is started and the call state is entered.

The configuration diagram shown in FIG. 1 shows a state in which a telephone call is in progress.
When a ringing PB signal tone is input via
The signal tone is input to the PB/RGT conversion circuit 6 through the switch 5, and the PB signal tone is detected in the PB/RG1 conversion circuit 6 to generate a calling signal. This PB signal sound is transmitted to the tone ringer 8 via the b contact side of the switch 7.
However, in the tone ringer 8, a ringing tone is generated from the ringing signal and inputted to the amplifier 9,
The signal is amplified in amplifier 19 and outputted from speaker lO. Therefore, during a call, the other party who is kept waiting can easily call the other party who is kept waiting by making a call using the PB signal.

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

As shown in FIG. 2, this embodiment includes a telephone line 102, a handset 11, a telephone circuit 12, a hook switch 13, a pushbutton dial 14, and a switch 1.
5, PB signal detection circuit 16, PB/RG'T
``Conversion circuit 17, switch 18, tone ringer 19
, a speaker volume 20 , an amplifier 21 , and a speaker 22 .

The PB signal detection circuit 16 is a circuit that detects the PB signal sound and sends a control signal to the speaker volume 20. The speaker volume 20 is normally controlled and adjusted by the user to adjust the gain of the amplifier 21 and output from the speaker 22. When the control signal from the PB signal detection circuit 16 is input, the gain of the amplifier 21 is controlled to increase the amount of W of the ringing tone. It has a function. Therefore, by calling the other party using the PB double signal,
You can call the person who is making you wait.

Note that the operations of other components are the same as in the first embodiment described above.

This embodiment has the advantage that even if the volume of the speaker volume 20 is turned down, it is possible to make a call at a high volume by controlling the PB signal sound from the other party.

〔Effect of the invention〕

As explained above, the present invention is applied to a telephone that does not have a speaker receiving function, and is capable of receiving P from the other party during a call.
By emitting a ringing tone using the H signal tone, even if the receiver and receiver are separated, the caller can easily receive a call from the other party, making it possible to have a smooth conversation.

[Brief explanation of the drawing]

1 and 2 are block diagrams of first and second embodiments of the present invention, and FIG. 3 is a block diagram of a conventional example. In the figure, 1, 11.23... handset, 2
．． 12, 24...--Telephone circuit, 3, 13.25-
-・・・Hook switch, 4.14.26・・・・
・Push button dial, 5°7, 15.1.8...
...Switch, 6,17...PB/RGT conversion circuit, 8, 1.9.27...Tone ringer, 9°21.28...Amplifier, to, 22.
29...Speaker, 16...PB signal detection circuit, 2o...Speaker volume.

Claims (1)

[Claims] A telephone set without a speaker receiving function is characterized by comprising means for reproducing and outputting a ringing PB signal tone sent from the other party via a telephone line during a conversation with the other party. A telephone set.