JP2615967B2 - Telephone - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone used for a key telephone device or a single telephone.

BACKGROUND ART FIG. 4 shows a plan view of a conventional telephone, in which reference numeral 40 denotes a handset provided with a transmitting microphone 40a and a receiving speaker 40b for performing an off-hook call, and reference numeral 41a denotes a transmitting side of the handset 40. Microphone for on-hook communication provided separately from microphone 40a, 41b is handset 4
A speaker for on-hook communication, which is provided separately from the speaker for reception 40b of 0, and a microphone mute key for turning on and off the microphone 41a for on-hook communication.

In the above conventional example, when the microphone mute key 42 is pressed during an on-hook call, the microphone 41a for the on-hook call is turned off, and when the microphone mute key 42 is pressed again in this state, the microphone 41a for the on-hook call is turned off. Turn on.

Therefore, the caller can interrupt the transmission during the on-hook call by operating the microphone mute key 42 during the on-hook call.

Problems to be Solved by the Invention However, in the above-mentioned conventional key telephone apparatus, transmission during on-hook communication can be interrupted, but transmission during on-hook communication by the handset 40 cannot be interrupted. .

In particular, a high-sensitivity microphone 40a has been used in recent years for the transmitting microphone 40a of the handset 40, and even if the microphone 40a of the handset 40 is manually interrupted when the transmitting is temporarily interrupted, the high-sensitivity microphone 40a is used. There is a problem that sound leaks to the side.

Incidentally, in order to solve the above problem, a mute key for interrupting the transmission during the on-hook call by the handset 40 may be separately provided, but in this case, the number of keys on the telephone increases. is there.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a telephone capable of interrupting off-hook communication by a handset without increasing the number of keys.

Means for Solving the Problems In order to achieve the above object, the present invention sets a microphone of a handset in a mute state in an off-hook call state with one key, and sets a microphone for on-hook call in a mute state in an on-hook state. It is something to set.

Operation According to the present invention, with the above-described configuration, it is possible to interrupt transmission during off-hook communication by the handset using one key, and also to interrupt transmission during off-hook communication and on-hook communication. The number does not increase.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a telephone according to the present invention, and FIGS. 2, 3 (a) and 3 (b) are flow charts for explaining the operation of the key telephone apparatus of FIG. In this embodiment, the one used for the key telephone apparatus is shown.

On the right side of FIG. 1, reference numeral 1 denotes a handset for performing off-hook communication, and the handset 1 includes a speaker 1a for receiving and a microphone 1b for transmitting. 2a
Is a speaker for on-hook communication provided separately from the speaker 1a of the handset 1, and 2b is a microphone for on-hook communication provided separately from the microphone 1b of the handset 1.

On the left side of FIG. 1, 4 turns on the microphone 1b of the handset 1 and the microphone 2b for on-hook communication,
Microphone mute key for turning off, 5 is a monitor key for performing on-hook communication, 6 is operation state of microphone mute key 4, monitor key 5, and an incoming signal for on-hook communication from a main device (not shown). And a central processing unit (CPU) 7 for performing control as described later by a control signal such as an incoming signal for a normal off-hook call, a two-line call line with the main device, a speaker 1a or 2a, and a microphone 1b. Or 2b
This is a communication circuit for performing 2-wire to 4-wire conversion between the two.

In this button telephone apparatus, the on-hook incoming call or the normal off-hook incoming call on the receiving side can be selected by a key operation of the calling side telephone. In this case, the main unit transmits an incoming signal to that effect to the receiving side telephone. Is configured to be transmitted to.

Reference numeral 8 denotes an analog switch for selectively outputting the voice signal of the call partner from the call circuit 7 to the speaker 1a of the handset 1 or the on-hook speaker 2a, and 9 denotes a voice signal of the call partner to the speaker 1a of the handset 1. An amplifier for amplifying, 10 is an amplifier for amplifying an audio signal of the other party to the on-hook speaker 2a, 11 is an amplifier for amplifying an audio signal from the microphone 1b of the handset 1, and 12 is an amplifier for amplifying the audio signal from the microphone 2b for on-hook communication. It is an amplifier that amplifies an audio signal.

13 is a mute analog switch for interrupting transmission from the microphone 1b of the handset 1, 14 is an mute analog switch for interrupting transmission from the microphone 2b for on-hook communication, and 15 is a switch of the handset 1. An analog switch for selectively transmitting a voice signal from the microphone 1b or the microphone 2b for on-hook communication to the other party, and these analog switches 8, 13, 14, and 15 are controlled by the CPU 6 as described later. You.

In FIG. 1, a key for designating an on-hook call of the telephone on the receiving side, a key for dialing, and other circuits necessary for the telephone are not shown.

Next, with reference to FIG.
Will be described.

In step 21, it is determined whether an incoming signal for on-hook communication or an incoming signal for normal off-hook communication is input from the main device at the time of an incoming call, and if an incoming signal for on-hook communication is input, step 22 is performed. Proceed to
If an incoming call signal for off-hook communication is input, the flow branches to step 27 and subsequent steps.

In step 22 (during on-hook communication), the analog switches 8, 13, 14, and 15 are controlled so that a communication path is formed by the on-hook communication speaker 2a and the microphone 2b. The telephone does not ring and the handset 1
An on-hook call can be made to a person located near the telephone without waiting for the off-hook of the telephone.

When the mute key 4 is pressed in this state, the process proceeds from step 23 to step 24, in which the mute analog switch 14 is turned off so that the transmission from the microphone 2b for on-hook communication is interrupted. Therefore, the caller of this telephone can interrupt the transmission during the on-hook call by operating the mute key 4 during the on-hook call.

When the mute key 4 is pressed again in this mute state, the process proceeds from step 25 to step 26,
The mute analog switch 14 is turned on so that the mute state is released. Therefore, the caller of this telephone can set and release the mute state each time the mute key 4 is operated during the on-hook call.

On the other hand, in step 27 (off-hook call), a ringing tone is generated by, for example, an on-hook communication speaker 2a (a ringing tone generating circuit and the like are not shown). If the handset 1 is off-hook during this ringing, steps 28 to 29 are performed.
To the speaker 1a and the microphone 1b of the handset 1.
Analog switch 8 so that a communication path by
Control 13,14,15.

Therefore, the caller of this telephone is the handset 1
Allows the user to communicate with the other party.

When the mute key 4 is pressed in this state, the process proceeds from step 30 to step 31, and the mute analog switch 13 is turned off so that the transmission from the microphone 1b of the handset 1 is interrupted. Therefore, by operating the mute key 4 during the off-hook call, the caller of this telephone can completely interrupt the transmission during the on-hook call without shielding the microphone 1b of the handset 1 with the hand.

When the mute key 4 is pressed again in this mute state, the process proceeds from step 32 to step 33,
The mute analog switch 13 is turned on so that the mute state is released. Therefore, the caller of this telephone can set and release the mute state each time the mute key 4 is operated during the on-hook call.

Further, in the on-hook communication routine shown in steps 22 to 26, when the monitor key 5 is depressed, as shown in FIG. 3 (a), the process proceeds from step 31 to step 32, and from step 29 to step 33 described above. Proceed to the indicated off-hook call routine. Similarly, when the monitor key 5 is depressed in the off-hook communication routine, the process proceeds to the on-hook communication routine as shown in FIG. 3 (b).

Therefore, according to the above-described embodiment, the off-hook telephone call and the on-hook telephone call can be selected on the receiving telephone.

In the above embodiment, the telephone used for the key telephone apparatus has been described. However, it is needless to say that the present invention can be applied to a single telephone directly connected to the office line.

In this case, the incoming signal for the on-hook call is not input from the main device at the time of the incoming call, so that the on-hook call of the called telephone cannot be selected from the calling telephone.
The microphone 1b of the handset 1 can be set to the mute state by the mute key 4 in the off-hook call state, and the microphone 2b for the on-hook call can be set to the mute state by the mute key 4 in the on-hook state. Key 5
Allows the user to select between off-hook and on-hook calls.

Effect of the Invention As described above, the present invention uses one key to
Since the microphone of the handset is set to the mute state in the off-hook call state and the microphone for the on-hook call is set to the mute state in the on-hook state, the transmission of the handset during the off-hook call can be performed without increasing the number of keys. You can stop talking.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a telephone according to the present invention, and FIGS. 2, 3 (a) and 3 (b) are flow charts for explaining the operation of the key telephone apparatus of FIG. FIG. 4 is a plan view showing a conventional telephone. 1 ... handset, 1a ... off-hook call speaker (first speaker), 1b ... off-hook call microphone (first microphone), 2a ... on-hook call speaker (second speaker), 2b ... On-hook call microphone (second microphone), 4 ... Mute key, 5 ... Monitor key, 6 ... Central processing unit (CP
U), 8,13,14,15 …… Analog switches.

Claims (3)

(57) [Claims] A handset having a first microphone and a first speaker for making an off-hook call with a call partner, a second microphone and a second microphone for making an on-hook call with the call partner. A telephone set comprising: a second speaker; and a key for setting the first microphone to a mute state in an off-hook state and setting the second microphone to a mute state in an on-hook state. 2. The telephone according to claim 1, further comprising a key for selecting an off-hook call and an on-hook call. 3. An off-hook communication is selected according to an off-hook communication incoming signal and an on-hook communication incoming signal from the main unit, respectively.
The described telephone.