JPH0575684A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To prevent a size of a slave set from being increased even when hand-free talking is made available for the slave set by using a hand-free means of the master set so as to attain hand-free talking between both the master set and the slave set. CONSTITUTION:A master set 1 is provided with a hand-free circuit 9 comparing a transmission signal and a reception signal so as to attenuate the transmission signal or the reception signal, a voice path changeover circuit 18 connecting the hand-free circuit 9 to a microphone 8 and a speaker 7 and a main control circuit 19 controlling the connection to the hand-free circuit 9 when a hand-free signal from the slave set is received. That is, when the hand-free key of the slave set is operated and a hand-free signal is sent, the master control circuit 19 of the master set 1 controls the voice path changeover circuit 18 to connect a reception circuit 3, a transmission circuit 4, the hand-free circuit 9 and a network circuit 5. Thus, the hand-free talking is implemented by the slave set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone device which enables a so-called hands-free call in a handset.

[0002]

2. Description of the Related Art In recent years, a cordless telephone device disclosed in, for example, Japanese Patent Laid-Open No. 26423/1990 has become widespread, and at the present time, it has become extremely multifunctional.

As one of the multi-functionalization, there is a so-called hands-free call disclosed in, for example, Japanese Patent Application Laid-Open No. 58-162157, so that the hands-free call can be made by both the master unit and the slave unit. Is required to do so.

[0004]

By the way, in a hands-free call, because a microphone and a speaker are housed in the same case, howling is generated, and therefore transmission and reception cannot be performed at the same time as in a normal handset. A device for comparing the speech signal with the reception signal and attenuating the transmission signal or the reception signal is provided.

As described above, when hands-free communication is performed by both the master unit and the slave unit, it is necessary to provide the attenuating device on both the master unit and the slave unit. It was not preferable for a child machine that requires miniaturization due to its nature.

[0006]

A cordless telephone apparatus according to the present invention comprises means for sending a signal input from a microphone to the slave unit as a transmission signal and means for outputting a received reception signal to a loud speaker. And a means for transmitting a hands-free signal, the master unit comparing the transmission signal with the reception signal and attenuating the transmission signal or the reception signal, and the hands-free means as a transceiver or Provided with means for selectively connecting to the microphone and loudspeaker, and means for controlling the connection means so that the handsfree means and the transceiver are connected when a handsfree signal from the slave is received. Is.

[0007]

Since the present invention is configured as described above, the hands-free means of the base unit enables hands-free communication between both the base unit and the handset.

[0008]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of the master unit (1),
(3) is a receiving circuit for receiving a signal from the slave unit (2),
(4) is a transmission circuit for transmitting a signal to the slave unit (2).
(5) is a network circuit connected to the telephone line (L) and includes a connection circuit for connecting and disconnecting the telephone line (L).
Reference numeral (6) is a handset, and reference numerals (7) and (8) are a loudspeaker and a microphone for making a hands-free call. Reference numeral (9) is a hands-free circuit for preventing howling at the time of hands-free, and is a transmission attenuation circuit (10) for attenuating a transmission signal and a reception attenuation circuit (1) for attenuating the reception signal.
1), a level comparison circuit (12) for comparing the signal levels of the transmission signal and the reception signal before being attenuated, and the transmission attenuation circuit (10) and the reception attenuation circuit based on the output of the comparison circuit (12) The attenuation control circuit (13) controls the attenuation amount of (11). The hands-free circuit (9) is a well-known technique as disclosed in, for example, Japanese Unexamined Patent Publication No. S58-162157, and a description thereof will be omitted here.

Reference numeral (14) is a hook detection circuit for detecting on-hook and off-hook of the handset (6), (15) is a numeric keypad (16), a key circuit including a hands-free key (17), and (18) is a reception circuit (3). ) And transmission circuit (4), network circuit (5), loudspeaker (7) and microphone (8), hands-free circuit (9), handset (6) under the control of the main control circuit (19). The voice path switching circuit to be connected to each other is connected to each circuit in the following combinations.

Handset (6) → Network circuit (5) Loudspeaker (7) and microphone (8) → Hands-free circuit (9) → Network circuit (5) Receiving circuit (3) and transmitting circuit (4) → Network Circuit (5) Reception circuit (3) and transmission circuit (4) → hands-free circuit (9) → network circuit (5) The above head number corresponds to the control command from the main control circuit (19), and The terminals of the circuits not described in the above combinations of connections are open.

Reference numeral (19) is a main control circuit composed of a microprocessor for controlling the master unit (1) as a whole.

FIG. 2 shows a block diagram of the slave unit (2),
(20) is a receiving circuit for receiving a signal from the base unit (1),
Reference numeral (21) is a transmission circuit for transmitting a signal to the master unit (1). Reference numeral (22) is an earpiece speaker connected to the amplifier (23), (24) is a loudspeaker speaker connected to the amplifier (25), and (26) is a signal from the receiving circuit (20) for the earpiece speaker ( 22) or a loudspeaker (24) for loudspeaker. (27)
Is a microphone connected to the transmitting circuit (21). A hands-free call can be made by combining the loudspeaker (24) and the microphone (27).
(28) is a key circuit including a numeric keypad (29), a call key (30), an off key (31) and a hands-free key (32), and (33) is a control circuit composed of a microprocessor, which is a slave unit (2 ) It controls the whole.

Next, the operation of the above configuration will be described.

First, when the handset (6) is off-hook for an incoming call from an outside line, the main control circuit (19) controls the voice path switching circuit (18) to connect the handset (6) and the network circuit (5). Connecting.

The hands-free key (1) on the base unit (1) side
7) is operated, and when the main control circuit (19) detects it, the main control circuit (19) causes the audio path switching circuit (1).
8) is controlled to connect the loudspeaker (7) and the microphone (8), the hands-free circuit (9), and the network circuit (5) in this order. As a result, a hands-free call can be made on the base unit (1) side. When the hands-free key (17) is operated again, the main control circuit (1
In 9), the connection is released and the line is released, so that the call can be ended.

Next, in response to an incoming call from an outside line, the call key (30) of the slave unit (2) is operated, and when this is detected by the control circuit (33), the control circuit (33) causes the incoming call response signal. And the speaker switching circuit (26) is controlled so as to be on the side of the receiving speaker (22). The main control circuit (19) of the base unit (1) which receives the incoming call response signal controls the voice path switching circuit (18) to connect the receiving circuit (3), the transmitting circuit (4) and the network circuit (5). To do. When the cut key (31) is operated, the control circuit (33) of the slave unit (2) transmits a cut signal to the master unit (1), and the main control circuit of the master unit (1) which receives the cut signal. In (19), the connection is released and the line is released, so that the call can be ended.

The hands-free key (3) of the child device (2)
2) is operated, and when the control circuit (33) detects this, the control circuit (33) transmits a hands-free signal and controls the speaker switching circuit (26) so as to be on the loudspeaker (24) side. . The main control circuit (19) of the parent device (1) which has received the handsfree signal controls the voice path switching circuit (18) so that the reception circuit (3) and the transmission circuit (4) and the handsfree circuit (9). ), And the network circuit (5). As a result, a hands-free call can be made in the child device (2). As described above, when the cut key (31) is operated, the slave unit (2)
The main control circuit (19) of the master unit (1), which receives the cut-off signal, transmits the cut-off signal to the master unit (1), releases the connection and releases the line, and thus the call ends. can do.

[0019]

As described above, according to the present invention, it is possible to make a hands-free call by both the master unit and the slave unit by the hands-free unit of the master unit without providing the hands-free unit in the slave unit. Therefore, even if the handset is provided with the hands-free call function, the handset does not become large.

[Brief description of drawings]

FIG. 1 is a block diagram of a base unit of a cordless telephone device of the present invention.

FIG. 2 is likewise a block diagram of a child device.

[Explanation of symbols]

 1 Master unit 2 Slave unit 7 Loudspeaker 8 Microphone 9 Hands-free circuit 18 Voice path switching circuit 19 Main control circuit 24 Loudspeaker 33 Control circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Kato 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. A master unit having a transceiver connected to a telephone line, and a slave unit wirelessly connected to the master unit, wherein the slave unit is connected to the telephone line via the master unit. In the cordless telephone device, a means for transmitting a signal input from a microphone as a transmission signal to the slave unit, a means for outputting a received reception signal to a loud speaker, and a means for transmitting a hands-free signal. Provided to the master unit, a hands-free means for comparing a transmission signal and a reception signal and attenuating the transmission signal or the reception signal, and the hands-free means are selectively connected to the transceiver or a microphone and a loud speaker. And a means for controlling the connecting means so that the handsfree means and the transceiver are connected when a handsfree signal from the slave unit is received. Dress phone equipment.