JPH02124667A - Telephone set - Google Patents

Abstract

PURPOSE:To start smooth talking by providing an identification circuit identifying whether or not a PB signal received in the speaker reception state is a control signal. CONSTITUTION:When a PB signal is received via a telephone line l1, a PB reception circuit 2 converts a received PB signal into a code, and transfers the result to an identification circuit 5 via a PB reception signal line l3 and a speaker reception switch S2. The identification circuit 5 identifies whether or not the inputted code represents control to a changeover circuit 6 and the changeover circuit 6 is controlled via a switching control line l5 when the code represents the control, a sound volume adjusting device output signal line l4 is disconnected to connect a voice signal line l2 to an amplifier circuit 7. Since the opposite voice is listened to from a speaker 8 at a maximum sound volume independently of the adjustment of a speaker sound volume adjusting device 4, a caller is called.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a telephone set, and particularly to a telephone set that uses a PB double signal and has a speaker receiving function.

[Conventional technology]

Conventionally, with this type of telephone, after the called party answers the call, during the wait time until the person the caller wants to talk to comes to the telephone, the caller puts the speaker in listening mode and listens for the answer of the person he wants to talk to. It is possible to use the speaker to confirm and then start the conversation.

[Problem to be solved by the invention]

The reason for this is that the conventional telephones mentioned above have the ability to adjust the volume of the speaker, but the caller wants to reduce the volume of the hold tone received from the other party's telephone when the caller is listening on the speaker. If you turn down the speaker volume with
At this time, there is a drawback that even if the other party answers, the caller cannot hear the other party's voice from the speaker, making it difficult to start the call smoothly.

[Means to solve the problem]

The telephone of the present invention includes a PB receiving circuit that receives a PB double signal from the other party during a call, an identification circuit that identifies whether or not the received PB double signal control signal is in a speaker listening state, and an identification circuit for the identification circuit. and means for making the call when the result is determined to be a control signal.

〔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, the first embodiment has telephone circuit 1 and PB
The receiving circuit 2 is connected to the telephone line 11, the speaker receiver switch S1 is connected to the stain disconnection circuit 1 through the audio signal line 12, and the receiver 3 is connected to the speaker receiver switch Sl.
The speaker volume adjuster 4 is connected to the contact T1 of the speaker receiver switch Sl, and the speaker receiver switch S2 is connected to the PB receiver circuit 2 through the PB receiver signal line 13. The identification circuit 5 is connected to contacts 1 and 3 of the speaker receiver switch S2,
The switching circuit 6 is a contact 'l'2 of the speaker receiver switch SL.
, the volume adjuster output signal all<<, the system beaker volume adjuster 4 is connected to the identification circuit 5 by the switching control line 15, the amplifier circuit 7 is connected to the switching circuit 6, and the speaker 8 is connected to the switching circuit 6. It is connected to the amplifier circuit 7.

Telephone circuit 1 transmits and receives call signals via telephone line ll.

The speaker receiver switches S1 and 82 are interlocked, and when normally the speaker receiver switch is not used, the contact Tl side of the speaker receiver switch S1 is closed, and the contact T3 of the speaker receiver switch S2 is closed.
is open. At this time, if a call is in progress, the other party's voice can be heard from the receiver 3, and the identification circuit 5 is separated from the PB receiving circuit 2 to prevent malfunctions caused by the FB double signal issued by the own terminal.

Next, when performing speaker reception, the contact T2 side of the speaker reception switch Sl is closed, and the contact T3 of the speaker reception switch 82 is closed. When the PB multiple signal is not received via the telephone line 111, the FB receiving circuit 2 and the identification circuit 5 do not operate, and the switching circuit 6 connects the volume adjuster output signal line 14 to the amplifier circuit 7. At this time, the other party's voice can be heard through the speaker 8, and the volume of the speaker 8 can be adjusted using the speaker volume adjuster 4.

Here, when receiving the PB double signal via telephone line 1h,
The PB receiving circuit 2 converts the received FB signal code into P
The signal is transferred to the identification circuit 5 via the B reception signal line 13 and the speaker reception switch S2. The identification circuit 5 identifies whether the input code is a control for the switching circuit 6, and if it is a control, controls the switching circuit 6 via the switching control line 15,
The volume adjuster output signal line 14 is disconnected and the audio value line 12 is connected.
is connected to the amplifier circuit 7. At this time, regardless of the adjustment of the speaker volume adjuster 4, the voice of the other party can be heard at the maximum volume from the speaker 8, so that the caller can be called.

When the call is resumed, the speaker receiver switch 5it82 is returned to its original position so that the receiver 3 can be used, and the identification circuit 5 is disconnected from the PB receiver circuit 2, returning to the initial state.

FIG. 2 is a block diagram of a second embodiment of the invention. As shown in FIG. 2, in the second embodiment, a telephone circuit 1 and a PB receiving circuit 2 are connected to a telephone line 11, and a speaker receiving switch Sl is connected to a stain disconnection circuit 1 through an audio signal line 12. Then, the receiver 3 is set to the speaker receiver switch S1.
The speaker volume adjuster 4a is connected to contact T1 of
is connected to the contact T2 of the speaker receiver switch SL, the speaker receiver switch S2 is connected to the 9PB receiver circuit 2 through the PB reception signal line 13, and the identification circuit 5 is connected to the contact T2 of the speaker receiver switch S1. The display control circuit 6a is connected to the identification circuit 5, and the amplifier circuit 7a is connected to the volume adjuster output signal line 14a, the beaker volume adjuster 4a, and the ringer output signal line 15a. The speaker 8 is connected to the display control circuit 6a, the speaker 8 is connected to the amplifier circuit 7a, and the display 9 is connected to the display control circuit 6a.
It is connected to the.

In FIG. 2, when a control PB multiplied signal is received from the other party while the speaker is listening, a display control circuit 6a is sent to an amplifier circuit 7 via a ringing tone output signal line 15a under the control of an identification circuit 5.
The display device 9 is operated at the same time as outputting a ringing tone to the terminal a. The caller can be called by this ejection sound and the display on the display 9.

In the second embodiment, since not only the ringing tone but also the display 9 is displayed, there is an advantage that it is possible to make a call more easily even when the surrounding noise is large.

〔Effect of the invention〕

As explained above, the present invention allows the caller to be called by sound or display by controlling the FB signal from the other party even if the speaker volume is turned down using the speaker volume adjuster while the speaker is receiving a call. This has the effect of facilitating smooth operation of the telephone.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a first embodiment of the invention, and FIG. 2 is a block diagram of a second embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Telephone circuit, 2... PB receiving circuit, 3... Receiver, 4.4a... Speaker volume adjuster, 5... Identification circuit, 6... Switching circuit, 6a...- display control circuit,
7, 7a...Amplification circuit, 8...Speaker, 9...
Display device s A'l...Telephone line, 12...Audio signal line, 13...PB reception signal line, A! 41Ai4a・
...Volume adjuster output signal line, l...Switching control line, 1
lia...Ring tone output signal line s J *82...
Speaker receiver switch, '11, r[, l 'r3・
··contact. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] A PB receiving circuit that receives a PB signal from the other party during a call, an identification circuit that identifies whether or not a PB signal received during a speaker listening state is a control signal, and the identification result of the identification circuit is a control signal. and means for making a call when it is determined that.