JP3195505B2 - Cordless telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone having a mischievous sound-reducing sound transmitting means, and more particularly to an operation at the end of a call.

[0002]

2. Description of the Related Art There has been known a telephone set which, when a prank call is received, emits a mischievous repulsion sound to a caller to make the caller uncomfortable and not to be reminded of making a prank call again. A conventional cordless telephone that emits such a mischievous tone will emit a mischievous tone during a call with a cordless handset, and the telephone will be cut off when it is charged.

[0003]

It is more effective to transmit the mischievous sound until the other party gives up and hangs up. However, in the above-described conventional cordless telephone, the mischievous tone during a cordless handset call is cut off when the cordless handset is turned on. Waiting for the other party to hang up while talking on the cordless handset is inconvenient and wastes the battery of the cordless handset. Therefore, the conventional cordless telephone has a problem that it is difficult to effectively send out the mischievous sound.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide a cordless telephone which continues to emit a mischievous tone until the other party hangs up, even if the cordless handset is turned on. Is to do.

[0005]

SUMMARY OF THE INVENTION A cordless telephone according to the present invention is a cordless telephone comprising a master unit having a loudspeaker and a mischievous sound emitting means, and a cordless receiver which is charged on the master unit. When the cordless handset is charged to the base unit during mischievous sound transmission from the base unit to a line and a cordless handset,
Switching to output the mischievous repulsion sound output to the cordless handset to the main unit loudspeaker and continuing the output to the line, terminating the communication of the cordless handset, and in this state, the base unit is busy. When a sound is detected, the call is terminated and a standby state is established.

[0006]

According to the cordless telephone of the present invention, when a cordless handset emits a mischievous tone during a call, if the cordless handset is charged to the base set, the mischievous tone is emitted until the other party hangs up. Therefore, no trouble is required, the battery of the cordless handset is not wasted, and it is possible to make the other party think that it is useless to make a prank call.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cordless telephone according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a base unit of a cordless telephone according to an embodiment of the present invention. In the figure, reference numeral 1 denotes an RF module for performing wireless communication with a slave unit, which amplifies and demodulates an RF (Radio Frequency) signal from an antenna and MSK modem 2
Alternatively, the signal is output to the compressor IC 4, and the signal from the MSK modem 2 or the compressor IC 4 is modulated into an RF signal, further amplified, and output to the antenna.

The MSK modem 2 is a microcomputer 3
And the RF module 1 modulate and demodulate the signal by the MSK method (minimum shift keying). The compressor IC 4 prevents leakage of line noise during a call by muting a signal exchanged between the RF module 1 and the speech IC.

The speech IC 5 mainly performs a switching operation between the line side and the receiver side, and switches signals communicated between the loudspeaker 6, the line, the RF module 1 and the microcomputer 3. The microcomputer 3 operates according to a signal from the MSK modem 2 or the speech IC 5 and outputs a digital signal to the MSK modem 2.
Control. The charge detection circuit 7 outputs to the microcomputer 3 a signal indicating whether or not the cordless handset is on-charged.

In the above configuration, a command output by performing any operation in the slave unit is taken into the microcomputer 3 via the RF module 1 and the MSK modem 2. The microcomputer 3 determines which operation has been performed by which child device, and the MSK modem 2 and the RF
An instruction is issued to the slave unit as a command via the module 1.

The audio signal output from the slave unit is R
The signal is transmitted to the loudspeaker 6 or the line via the F module 1, the compressor IC 4 and the speech IC 5.
This transmission path is provided by the micro computer 3 for the speech IC.
5 is determined. Conversely, a voice signal from the line or a beep sound generated by the microcomputer 3 is output to the loudspeaker 6 via the speech IC 5 when not communicating with the slave unit, and is output to the compressor during communication with the slave unit. It is output to the slave via the IC 4 and the RF module 1.

Next, the operation at the time of sending out the mischievous repulsion sound will be described with reference to the flowchart of FIG. If it is determined that the call is a prank call during communication, the operation of step S1 is performed by key operation, and a mischievous sound is sent out to the line. Next, step S
At 2, it is determined whether the cordless handset (the handset placed on the base set of the base unit) is on-charged. If so, the process proceeds to step S3, and if not, step S4. Move to

In step S3, the microcomputer 3
Beep sound (mischief rejection sound) from line and loudspeaker 6
And the process moves to step S5. In step S4, a beep sound (mischievous repulsion sound) from the micro computer 3 is output to the line and the cordless receiver, and the process proceeds to step S5.

In step S5, a busy tone (BUS
It is determined whether or not (Y TONE) is detected. If a busy tone is detected, the process proceeds to step S6, and if no busy tone is detected, step S2 is repeated. Step S6
Then, the call ends and the apparatus enters a standby state.

[0015]

According to the cordless telephone of the present invention,
Even if a cordless handset is turned on by sending a mischievous tone to a prank call, the mischief can be effectively eliminated because the mischievous tone is continued to be emitted until the other party hangs up.

[0016] Further, after the on-charge, the mischievous repulsion sound is louder than the speaker of the base unit, so that it is not necessary to communicate with the cordless handset, and the consumption of the battery of the slave unit is suppressed.

Furthermore, if the other party hangs up while the mischievous sound from the main unit speaker is louder, the busy sound is detected and the system enters a standby state, so that the trouble is saved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing an operation of the cordless telephone.

[Explanation of symbols]

 Reference Signs List 1 RF module 2 MSK modem 3 Microcomputer 4 Compressor IC 5 Speech IC 6 Loudspeaker 7 Charge detection circuit

Claims (1)

(57) [Claims] 1. A cordless telephone comprising: a base unit provided with a loudspeaker and a mischieving / sound emitting unit; and a cordless handset which is charged on the base unit, wherein a mischief is transmitted from the base unit to a line and a cordless handset. When the cordless handset is charged on the base unit during transmission of the repulsion sound, switching is performed so that the mischief rejection sound output to the cordless handset is output to the base unit loudspeaker and output to the line is continued. A cordless telephone which terminates communication with the cordless handset and terminates the call and enters a standby state when the master unit detects a busy tone in that state.