JPH07177205A - Telephone set - Google Patents

Abstract

PURPOSE:To reduce a radical tone to a telephone call opposite part when the handset is put earlier. CONSTITUTION:A control part 1 turns ON an origination source 17 for a signal other than audible tones during a telephone call. When the handset 8 is put closer to the telephone set main body in order to put the handset on at the same time of the early on-hook operation of the handset, the microphone 10 in the handset picks up a nonaudible tone and when this picked-up signal is detected, by a nonaudible signal detection part 18, a muting circuit 19 is controlled through the control part 1 to lower transmission sound volume. Consequently, the radical tone generated when the handset 8 is put back on the telephone set main body is attenuated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone device, an extension telephone of a private branch exchange, and a telephone directly connected to a central office exchange, and more particularly to a telephone for reducing an extreme sound at the end of a call.

[0002]

2. Description of the Related Art FIG. 4 shows a schematic block diagram of a conventional telephone.

In FIG. 4, 1 is a control unit for controlling the entire telephone set, 2 is an incoming call detection unit connected between lines L1 and L2 connected to an office line or PBX extension, and a detection signal at the time of incoming call is a control unit. 1 has been notified. Reference numeral 3 denotes a dial sending unit which is serially inserted in the line L, which sends a dial pulse according to a command from the control unit 1 and forms a DC loop. Reference numeral 4 is a DC loop holding circuit unit connected between the lines L1 and L2, 5 is a DC signal cutting capacitor, 6 is a call transformer connected between the lines L1 and L2, and 7 is a side tone control connected to the call transformer 6. Hybrid part (HY
B), and this hybrid unit 7 has a handset 8
The receiver 9 and the microphone 10 are connected via the reception amplification section 11 and the transmission amplification section 12.

Reference numeral 13 designates a power source section for converting electric energy from the office line or the PBX extension line into a power source for internal control of the telephone,
Reference numeral 14 is a speaker connected to the hybrid unit 7 and the control unit 1 via the amplification unit 15, and 16 is a monitoring unit that monitors the state of the hook switch and the key input.

Next, the operation of the above conventional example will be described.
First, the case of an incoming call will be described. When an incoming call signal arrives, the incoming call signal is detected by the incoming call detection unit 2, and the incoming call signal is transmitted to the control unit 1. The control unit 1 causes the speaker 14 to ring through the speaker amplification unit 15 to generate a ring tone. When a telephone user or the like who has sensed the ringing sound from the speaker 14 picks up the handset 8 to turn on the hook switch, a signal for answering the incoming call is transmitted from the monitoring unit 16 to the control unit 1. As a result, the control unit 1 turns on the contact of the dial sending unit 3, forms a DC loop through the DC loop holding circuit unit 4, and sends a response signal to the station line or PBX extension line.

When the call circuit is formed by turning on the contact of the dial sending unit 3, the voice signal from the office line or the PBX extension, the contact of the dial sending unit 3 and the capacitor 5, the call transformer 6, the hybrid unit. 7. The data is transmitted to the receiver 9 in the handset 8 via the telephone amplification unit 11.

The transmission signal from the own telephone is the handset 8
The signal is input from the microphone 10 inside, and is transmitted to the office line or the PBX extension line via the contacts of the transmission amplification unit 12, the hybrid unit 7, the call transformer 6, the capacitor 5, the dial transmission unit capacitor 5, and the dial transmission unit 3.

Next, the call origination will be described. Monitoring unit 1
Upon receiving the off-hook information from the control unit 6, the control unit 1 controls the dial transmission unit 3 to form a DC loop, and the station or the PBX.
Send a line capture signal to. Next, when key information is input from the monitoring unit 16 to the control unit 1, the control unit 1 controls the dial sending unit 3 to send the dial information to the local line or P
Send to BX. When the station or the PBX side responds, the call state is established, and the exchange of voices for transmission and reception is the same as when receiving a call.

At the time of ending the first call, the on-hook information is transmitted from the monitoring section 1 to the control section 1, and the control section 1 turns off the contact of the dial sending section 3.

As described above, the above-mentioned conventional telephone is capable of making and receiving a call and ending the call.

[0011]

However, in the above-mentioned conventional telephone, since the communication path is connected until the hook switch is turned on at the end of the call by the user, the moment the handset 8 is placed on the telephone body, There is a problem that a sound of contact between the handset 8 and the main body of the telephone before the hook switch is turned on is input from the microphone 10 of the handset 8 and is transmitted to the other party as a radical sound.

The present invention solves such a conventional problem, and an object of the present invention is to provide an excellent telephone which can reduce the excessive sound to the other party at the end of the call due to the handset pioneering.

[0013]

In order to achieve the above object, the present invention provides a handset which is connected to a central office line or a PBX extension line, and a handset which is connected to a communication circuit of the main body of a telephone and has a receiver and a microphone. A telephone provided with the telephone body, which is provided in the telephone body and operates when a call is established; and an audible non-audible signal source, which is provided in the telephone body and picked up by the microphone when the handset approaches the telephone body. An audible non-audible signal detecting means for detecting an audible non-audible signal, and a mute means connected to the microphone transmission path for attenuating the microphone transmission volume based on a detection signal output from the audible non-audible signal detecting means. It is configured to include.

[0014]

Therefore, according to the present invention, by detecting that the handset approaches the main body of the telephone during a call,
It is possible to reduce the excessive sound to the other party at the end of the call due to the handset pre-emptive.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a configuration according to an embodiment of the present invention.

In FIG. 1, the same parts as those in FIG. 4 are designated by the same reference numerals, and the description of the structure thereof will be omitted.

That is, according to the present embodiment, the audible non-audible signal transmission source 17 controlled by the controller 1 and the output signal from the microphone 10 picked up through the microphone 10 when the handset 8 is brought close to the telephone body. A non-audible signal detection unit 18 for detecting a non-audible signal is provided inside the telephone body, and the mute circuit unit 1 controlled by the control unit 1 is further provided.
A transmission voice path connecting the transmission amplification unit 12 and the hybrid unit 7 is newly provided.

Next, the operation of the above embodiment will be described.
In this embodiment, the operation from the incoming call to the call state and the operation from the outgoing call to the call state are the same as those in the above-mentioned conventional example, and therefore description thereof is omitted.

Hereinafter, with reference to FIG. 1, FIG. 2 and FIG. 3, an explanation will be given of the ending operation of the call from the talking state by the first call.

FIG. 2 shows a timing chart in the embodiment of the present invention. The non-audible signal source 17 and the non-audible signal from the stand-by state to the call state, the end call operation by the user's first call, and the stand-by state. FIG. 6 is a timing diagram regarding control of the detection unit 18, the dial transmission unit 3, and the transmission mute circuit unit 19.

At the point a in FIG. 2, the contact point of the dial sending unit 3 in FIG. 1 is turned on, and a direct current loop is formed to establish a call state. Simultaneously with the call state, the control unit 1 turns on the audible non-audible signal source 17 of the telephone body of FIG. 1, and monitors the on-hook operation in which the handset 8 is placed on the telephone body, that is, the call-ending operation by the user's first call. Is started by the non-audible signal detection unit 18.

The call state at this time will be described with reference to FIG.
The telephone sound from the office line or the PBX extension is transmitted to the receiver 9 in the handset 8 via the contacts of the dial sending unit 3, the capacitor 5, the call transformer 6, the hybrid unit 7 and the telephone amplifying unit 11.

In addition, the transmission of voice is performed from the microphone 10 in the handset 8 through the transmission amplifier unit 12, the mute circuit unit 19, the hybrid unit 7, the call transformer 6, the condenser 5, and the contact point of the dial transmission unit 3 to the local line. Or, it is transmitted to the PBX extension line.

At this time, the mute circuit section 19 is off, and there is no loss in the mute circuit section 19.

When the handset 8 is approached to be placed on the main body of the telephone by the end of the call after the call ends and the call start operation is started, the non-audible signal generated from the non-audible signal source 17 is generated by the microphone in the handset 8. The non-audible signal is detected by the non-audible signal detection unit 18 from the output signal from the microphone 10, and the detection signal is output to the control unit 1. Upon receipt of this signal, the control unit 1 immediately turns on the mute circuit unit 19 to mute the call. This state is point b in the timing chart of FIG. Also, at this point, the contact point of the dial sending unit 3 is in the ON state and the communication path is still connected, so the sound picked up by the microphone 10 is
It is transmitted to the central office line or the PBX extension line. However, since the mute circuit unit 19 is muted, the excessive sound generated by the contact of the handset 8 at the moment when the handset 8 is placed on the telephone body is reduced. Then, when hooked on at point c in FIG. 2, all the controls are turned off and a standby state is set.

FIG. 3 is a timing chart when an attempt is made to end the call by the user's first call from the call state, but when the user thinks of it, the call is resumed, and then the call is ended by the user's first call. Is shown.

Point d in FIG. 3 is a state in which the audible signal detection unit 18 detects the call-end operation by the user's first call from the talking state, and the control unit 1 turns on the mute circuit unit 19.
At point e in FIG. 3, when the user forgets it, the mute is released. This series of operations has no problem in practical use because the mute is released when the handset is brought close to the user's face without thinking about the end of the call. In addition, points f and g in FIG.
Regarding the point, the operation is similar to the points b and c in FIG.

As described above, according to the above embodiment, when the handset 8 is placed on the side of the telephone main body due to the end of the call by the user during the call, the non-audible signal source 17 in the telephone main body 17 is placed. Inaudible signal from handset 8
The microphone is picked up by the internal microphone, and the non-audible signal detection unit 18 detects the non-audible signal from the output signal to mute the voice path of the transmitted voice. Handset 8
Even when picked up by the internal microphone 10, the extreme sound can be reduced, and it is possible to prevent the extreme sound from being transmitted to the other party.

[0029]

As is apparent from the above embodiment, the present invention detects the operation of the handset being on-hook with the main body of the telephone during a call, by detecting the non-audible signal source and the non-audible signal through the microphone of the handset. Since it is configured to monitor by the non-audible signal detection unit and to mute the audio path of transmission when the non-audible signal detection unit detects the non-audible signal, the handset and the telephone body It is possible to reduce the excessive sound caused by contact and prevent the excessive sound from being transmitted to the other party.

Further, in the present invention, since the non-audible signal is used, it can be realized without affecting the call.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of a telephone according to an embodiment of the present invention.

FIG. 2 is a timing diagram for explaining the operation in the embodiment of the invention.

FIG. 3 is a dimming diagram for explaining the operation in the embodiment of the present invention.

FIG. 4 is a schematic block diagram of a conventional telephone.

[Explanation of symbols]

 1 Control Part 2 Incoming Call Detection Part 3 Dial Sending Part 4 DC Loop Holding Circuit Part 5 Capacitor 6 Speech Transformer 7 Hybrid Part 8 Handset 9 Receiver 10 Microphone 11 Receive Amplification Part 12 Transmit Amplification Part 13 Power Supply Part 14 Speaker 15 Speaker Amplification Part 16 Hook switch / key input monitoring section 17 Non-audible signal source 18 Non-audible signal detection section 19 Mute circuit section

Claims (1)

[Claims] 1. A telephone having a telephone body connected to an office line or a PBX extension, and a handset connected to a call circuit of the telephone body and having a receiver and a microphone built therein, the telephone being provided in the telephone body. An audible non-audible signal source that operates when established, an audible non-audible signal detection unit that is provided in the telephone body and that detects the non-audible signal picked up by the microphone when the handset approaches the telephone body, and the microphone. And a mute means for attenuating the speaking volume of the microphone based on a detection signal output from the non-audible signal detecting means.