JP3469656B2 - Cordless telephone - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a cordless telephone that connects a telephone line by voice.

[0002]

2. Description of the Related Art Commercially available telephones have become more sophisticated, and hands-free telephones have been put on the market that allow users to talk without lifting a handset. Initially, hands-free telephones had to press a button to enter a hands-free call state when there was an incoming call signal, so that both hands were not completely free.
Therefore, a telephone (for example, Japanese Laid-Open Patent Publication No. 2-202255) is conceivable and put on the market, when the called party emits a voice such as "high" at the time of an incoming signal to connect the telephone line and put it in a hands-free call state. ing.

[0003]

Many cordless telephones equipped with a handset wirelessly connected to the base unit and charged by the base unit are commercially available, and there is a demand for mounting a hands-free call function on both the base unit and the handset. . Therefore, considering the case where the handset is placed on the base unit and charged, it is unclear which of the base unit and the handset is in the hands-free call state, which may confuse the user. For this reason, it is preferable to limit the call to only the master unit or the receiver. Further, there are commercially available cordless telephones that are charged with the speaker and the microphone of the handset facing downward. If this handset becomes a hands-free call, a normal call cannot be made. Furthermore, in models that require low cost voice detection circuits, the voice detection circuit of the handset is a circuit dedicated to "high" detection that detects "high" only by the voice level and time. The detection circuit also serves as a "high" voice detection circuit because the voice recognition circuit is capable of recognizing a voice waveform for other voice recognition functions. In such a model, it is clear that the master unit has a higher voice detection performance than the handset while the master unit is being charged, and it is preferable to limit "high" detection to the master unit.

[0004]

The present invention has been made in view of the above points, and is characterized in that a charging detection circuit for detecting that the handset is being charged by the base unit is provided in the base unit or the handset. The control circuit limits the base unit or the handset based on the output of the charge detection circuit and puts it in a call state.

[0005] As an example of limiting the base unit to the call state,
There are the following three methods.

When the handset detects charging, the handset does not send a call start signal to the base unit even if it detects voice.

When the base unit detects that the base unit is being charged, the base unit sends to the handset a charge-in-progress signal notifying that the base unit is being charged,
The handset that receives this signal does not send a call start signal to the base unit even if it detects voice.

When the base unit detects that the base unit is being charged, even if the base unit receives the call start signal, the base unit does not send the notification signal permitting the handset into the call state to the handset.

There are the following two methods as an example of limiting the handset to the call state.

When the base unit detects that the base unit is being charged, the base unit does not enter into a call state even if it detects a voice, and does not send a call start signal for notifying the start of the call of the base unit to the handset.

When the master unit detects that the battery is being charged, the master unit does not connect the microphone and the voice recognition circuit even if it detects an incoming signal.

[0012]

When the receiver is connected to the base unit for charging, the call is limited to only the base unit or the receiver.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is applied to an embodiment of a cordless telephone having a hands-free function and will be described with reference to the drawings. FIG. 1 shows a block diagram of a base unit (1) of the embodiment, and FIG. 2 shows a block diagram of a handset (2).

In the master unit (1) of FIG. 1, (3) is an incoming call detection circuit, which detects an incoming call from the telephone line (4).
Reference numeral (5) is a network circuit, which is connected to the telephone line (4) and performs conversion between a four-line system on the telephone side and a two-line system on the telephone line side. Further, the telephone line (4) and the telephone (1) are also connected and disconnected. (6) is a control circuit, which controls each circuit. Reference numeral (7) is a receiving circuit, which receives a signal from the slave unit via the antenna (8). (9) is a transmission circuit,
Output signals from the network circuit (5) and the control circuit (6) are transmitted to the slave unit via the antenna (8). (1
Reference numerals 0) and 11) are a microphone and a speaker, which are used during a hands-free call on the base unit. The microphone (10) is also a voice input device for recognizing voice. (12) and (13) are microphones (10), respectively
Amplifier circuit for speaker and speaker (11). (14) is a voice recognition circuit, which digitally analyzes the voice signal from the switching circuit (15) to recognize its pronunciation. Then, the result is compared with the specific word designated by the control circuit (6) and the result is returned to the control circuit (6). The switching circuit (15) switches between connecting the network circuit (5) to the microphone (10) and the speaker (11) or to the receiving circuit (7) and the transmitting circuit (9), and voice recognition. The circuit (14) and the microphone (10) are connected and disconnected. (1
6) is a bell that outputs a ringing tone when an incoming call arrives. Reference numeral (17) is a lamp made of an LED for notifying an incoming call. (1
8) is an input means, such as a ten-key pad (19) for inputting at least a telephone number, a hands-free key (20) for making a hands-free call during a call, and an end key (21) for ending a hands-free call. It is equipped with. (22) is a charge detection circuit, which detects the charge of the handset (2). The charge detection circuit (22) is a circuit required in the second to fifth embodiments described later. When the handset (2) is placed on the base unit (1), the battery (not shown) of the handset (2) is charged by the contacts (not shown) and the charging circuit of the base unit. Even when the battery is fully charged, the charging circuit sends a small current to the battery. When the charge detection circuit (22) detects this current, the control circuit (6) determines that the handset (2) is mounted on the master unit (1).

Next, in the receiver (2) of FIG. 2, (2
3) and 24 are a speaker and a microphone for talking on the handset 2. Also, microphone (24)
Is also a voice input device for recognizing voice. (2
Reference numerals 5) and (26) are amplifier circuits for the speaker (23) and the microphone (24), respectively. Reference numeral (27) is a receiving circuit, which receives a signal from the base unit (1) via the antenna (28) and outputs the signal to the speaker (23) via the amplifying circuit (25). (29) is a transmission circuit, and a microphone (2
The signal from 4) and the signal from a control circuit (38) described later are transmitted to the parent device (1) via the antenna (28).
(30) is a voice detection circuit, which is a microphone (24)
The signal "High" is detected by measuring the level above a predetermined level and the time from the signal from. (31) is a bell, which outputs a ringing tone when an incoming call arrives. Reference numeral (32) is a lamp including an LED, which notifies an incoming call. (33) is an input means, such as a numeric keypad (34) for inputting at least a telephone number, a call key (35) for starting a handset call when an incoming call is received, a hands-free key (36) for making a hands-free call during a call, An end key (37) for ending the hands-free call is provided. (38) is a control circuit for controlling each circuit. (3
9) is a charge detection circuit, which detects the charge of the handset (2). The charge detection circuit (39) is a circuit required in the first embodiment described later. When the handset (2) is placed on the base unit (1), the charging circuit of the base unit charges the battery (not shown) of the handset (2). By detecting this current by the charge detection circuit (39), the control circuit (38) can determine that the handset (2) is mounted on the master unit (1). It is also possible to use a detection means for detecting on-hook or off-hook as the charge detection circuits (22) and (39), or to use a mechanical leaf switch or the like.

A first embodiment having the above structure will be described with reference to FIGS. The handset (2) in the first embodiment is a cordless telephone that can be charged only by the base unit (1). 3 is a flowchart showing the operation of the control circuit (6) of the master unit (1), and FIG. 4 is a flowchart showing the operation of the control circuit (38) of the handset (2). When the control circuit (6) of the base unit (1) receives an incoming signal from the incoming detection circuit (3) (Y of A1), it rings the ringing bell (16) (A2) (not shown, but the bell ( 1
When sounding 6), turn on the lamp (17)). At the same time, send an incoming command to the handset (2) (A
3), controlling the switching circuit (15) to control the microphone (1
0) and the voice recognition circuit (14) are connected. When the handset (2) receives the incoming command (Y in a1),
The bell (31) for calling is sounded (a2) (not shown, but when the bell (31) is sounded, the lamp (32) is turned on). Thus, the base unit (1) and the handset (2) are in a state of waiting for the callee's response.

First, when the called party lifts the handset (2) off hook without saying "high" while the handset (2) is charging (Y in a3), or the handset (2) is not charging. If the called party presses the call key (35) at this time (not shown), the control circuit (38) of the handset (2) causes the base unit (1) to send a call start command requesting permission to start the call. (A4). Upon receiving this (Y of A5), the control circuit (6) of the master unit (1) causes the handset (2) to transmit a response command permitting the call (A6), and also the bell (1
The ringing of 6) is stopped (A7) and the receiver circuit (7) or the transmitting circuit (9) is connected to the network circuit (5), and the handset talk mode is set (A8). The control circuit (38) of the handset (2) that has received the response command of step A6 (Y of a5) stops the ringing of the bell (31) (a6) and sets the handset communication mode (a7). As a result, a call can be made while holding a normal handset.

Next, after step A4 and step a2,
When the master unit (1) utters "high", the control circuit (6) detects this through the voice recognition circuit (14) (Y of A9). Then, the control circuit (6) of the base unit (1) receives a call start command for notifying the start of the call, and the handset (2)
(A10). Handset that received this (2)
The control circuit (38) stops the ringing of the bell (31 of (a8)) (a9), and enters a mode for prohibiting a telephone call on the handset (2) (a10). The base unit (1) which has transmitted the call start command in step A10 stops the ringing of the bell (16) (A11) and sets the base unit hands-free call mode such as connecting the speaker (11) to the network (A1).
2). Thereby, the base unit (1) can make a hands-free call.

After step A4 and step a2,
When the handset (2) utters "high", the control circuit (38) detects this through the voice detection circuit (30) (Y of a11). Here, the control circuit (38) checks by the charge detection circuit (39) whether or not charging is in progress (a12).
If the battery is being charged (Y in a12), the process returns to the process after step a2 of waiting for the callee's response via step a8. That is, since the "high" voice detection in the handset (2) is ignored during charging, as a result, the "high" voice detection on the side of the base unit (1) results in the base unit (1). Only hands-free calls can be made.

When the charging is not detected in step a12 (N in a12), the control circuit (3) of the handset (2) is used.
8) causes the base unit (1) to transmit a call start command requesting permission to start a call (a13). We received this (A5
Y), the control circuit (6) of the master unit (1) causes the handset (2) to transmit a response command permitting the call (A6),
The ringing of the bell (16) is stopped (A7) and the receiver circuit (7) and the transmission circuit (9) are connected to the network circuit (5), and the handset communication mode is set (A8). The control circuit (38) of the handset (2) which has received the response command of step A6 (Y of a14) stops the ringing of the bell (31) (a1).
5) Set the handset handsfree call mode (a1)
6). As a result, the handset (2) can make a hands-free call.

As described above, in the first embodiment, when the handset (2) detects that charging is in progress, even if "high" is detected, a call start command requesting permission to start a call is not sent to the master unit (1). Thus, when the handset (2) is mounted on the base unit (1), only the base unit (1) can make a hands-free call. However, if the handset (2) can be charged by a charger (not shown) other than the base unit (1), make a hands-free call with the handset (2) by "high" while charging by the charger. Can not be. The second and third embodiments solve the problem.

A second embodiment will be described with reference to FIGS. 5 is a flowchart showing the operation of the control circuit (6) of the master unit (1), and FIG. 6 is a flowchart showing the operation of the control circuit (38) of the handset (2). FIG. 5 shows steps B1 and B2 added between steps A2 and A3 of FIG. 3, and FIG. 6 shows step a12 of FIG. 4 replaced with step b1. The same numbers indicate the same operation, and the description is omitted.

The control circuit (6) of the master unit (1) rings the bell (16) when an incoming call arrives (A1, A2). Then, the charge detection circuit checks whether or not charging is in progress (B1). If charging is in progress (Y of B1), a charging command indicating that charging is in progress is added to the above-mentioned incoming signal (B2) and transmitted to the handset (2). When the control circuit (38) of the handset (2) receiving this signal detects "high" (a1
1), it is checked whether a charging command is received (b)
1). Similar to the first embodiment, the subsequent process is the handset hands-free call mode if received, and the handset call inhibit mode if no charging command is received.

A third embodiment will be described with reference to FIGS. 7 and 8. 7 is a flowchart showing the operation of the control circuit (6) of the master unit (1), and FIG. 8 is a flowchart showing the operation of the control circuit (38) of the handset (2). FIG. 7 shows a step C1 added between steps A5 and A6 of FIG. 3, and FIG. 8 shows a step c1 added by deleting step a12 from FIG. The same numbers indicate the same operation, and the description is omitted.

When the control circuit (6) of the master unit (1) receives the call start command from the handset (2) (Y of A5), it detects that the charging is detected by the charging detection circuit (22). (Y of c1) To return to step A9,
No response command is sent to the handset (2), and the handset (2) does not become a hands-free call. Then, when the base unit (1) detects "high", the base unit (1)
Is a hands-free call, and the handset (2) uses the bell (3
The ringing of 1) is stopped and the handset hands-free call mode is set.

Compared with the first embodiment, in the second and third embodiments, the handset (2) is charged by a unit other than the master unit (1) in order to detect that the master unit (1) is charging. The handset (2) can make a hands-free call even when it is charged by the device.

[0027] Normally, it is the handset (2) that makes the call. Therefore, while the handset (2) is being charged by the base unit (1), only the handset (2) may be in a hands-free call. This method is shown in the fourth and fifth embodiments.

A fourth embodiment will be described with reference to FIGS. 9 and 10. 9 is a flowchart showing the operation of the control circuit (6) of the master unit (1), and FIG. 10 is a flowchart showing the operation of the control circuit (38) of the handset (2). 9 shows a step D1 added between steps A9 and A10 in FIG. 3, and FIG. 10 shows a step a12 deleted from FIG. The same numbers indicate the same operation, and the description is omitted.

When the control circuit (6) of the master unit (1) detects "high" through the voice recognition circuit (14) (Y of A9), whether or not charging is being performed by the charge detection circuit (22). (D1). If charging is in progress (Y of D1), check whether a call command from the handset is received (A
5). If it is not charging, the base unit becomes a hands-free call. As described above, in the fourth embodiment, when the main unit (1) detects that the main unit is charging, the main unit (1) does not enter into a call state even if it detects a voice, and the main unit (1) makes a call. Since the call start signal notifying the start is not sent to the handset (2), only the handset (2) is in hands-free call.

A fifth embodiment will be described with reference to FIG.
FIG. 11 is a flowchart showing the operation of the control circuit (6) of the parent device (1), which is obtained by adding steps E1 and E2 to FIG. The flowchart showing the operation of the control circuit (38) of the handset (2) is the same as that of FIG. 10 of the fourth embodiment. The same numbers indicate the same operation, and the description is omitted.

When the control circuit (6) of the master unit (1) rings the bell (16) upon receiving an incoming call and the handset sends an incoming command (A1 to A3), whether or not charging is being performed by the charging detection circuit (22). (E1). If it is charging (E
1 Y) Microphone (10) and voice recognition circuit (14)
The switching circuit (15) is controlled so as not to connect (E)
2) If not charging (E1 N) Microphone (1
0) and the voice recognition circuit (14) are connected to control the switching circuit (15) (A4). By this, the base unit (1)
When detecting charging, the microphone (10) cannot detect "high" because it is not connected to the voice recognition circuit (14). Therefore, it is possible to make a hands-free call only with the handset (2).

In the first to third embodiments, when the handset (2) is being charged by the base unit (1) and the base unit (1) is in a hands-free call state, the handset (2) is held. If it raises, it will be a handset call using a handset (2). At this time, the control circuit (6) of the base unit (1) performs an operation of shifting from the handsfree call mode of the base unit to the handset call mode, and the control circuit (38) of the handset (2) moves from the handset call prohibit mode to the handset. The action of transitioning to handset talk mode must be performed. In this respect, in the fourth and fifth embodiments, the control circuit (6) of the master unit (1) does not have to perform the above-mentioned transition operation, and the control circuit (38) of the handset (2) does the hands. Only the transition from free call to handset call is sufficient, and it is possible to quickly transition to the handsfree call of the handset with a simple operation. The fourth and fifth embodiments are similar to the second and third embodiments in the handset (2).
Even when is charged by a charger other than the base unit (1), the handset (2) can make a hands-free call.

12 and 13 are block diagrams of a master unit (1) and a slave unit (2) in the sixth embodiment, and the same circuits as those in FIGS. 1 and 2 are designated by the same reference numerals. .

Then, the voice recognition circuit (1) of the base unit (1)
4) is the output of the receiving circuit (7) and the microphone (10)
Switch (4) for switching the output of the amplifier (12)
The output of 0) is input. In addition, cordless handset (2)
Does not have a voice detection circuit.

FIG. 14 and FIG. 15 show flowcharts of the programs of the main parts relating to the incoming call processing written in the control circuits (6) and (38) of the master unit (1) and the handset (2). The operation will be described.

First, the control circuit (6) of the master unit (1) monitors whether the incoming call detection circuit (3) has detected an incoming call (F).
1). Here, the control circuit (6) of the base unit (1) that has detected the incoming call determines whether or not the handset (2) is being charged based on the charge detection circuit (22), and if it is not being charged, the handset An ON command signal is transmitted to (2) (F2,
3). Upon receiving the ON command signal, the control circuit (38) of the handset (2) drives the bell (31) (f1, 2).
In the control circuit (6) of the parent device (1), after that, the built-in timer is started and the changeover switch (4)
0) to control the amplifier (12) of the microphone (10)
Is output to the voice recognition circuit (14) (master unit voice recognition mode) (F4, 5). That is, the voice recognition circuit (14)
Performs voice recognition on the input voice from the master unit (1) side. This is because the smaller the external noise is, the higher the recognition rate of the voice recognition becomes. Therefore, the base unit (1) that does not drive the bell recognizes the voice.

Then, the voice recognition circuit (14) becomes "high".
When the timer counts 1 second without recognizing, the control circuit (6) of the parent device (1) transmits an OFF command signal and drives the bell (16) (F6, 7, 1).
1, 12). Upon receiving the OFF command signal, the control circuit (38) of the handset (2) stops the bell (31) and turns on the transmission circuit (29) to turn on the microphone (2).
The signal from 4) is transmitted to the main | base station (1) (f4-6).
After that, the control circuit (6) of the parent device (1) starts the timer and then controls the changeover switch (40) to give the output of the receiving circuit (7) to the voice recognition circuit (14). (Handset voice recognition mode) (F13, 14). After that, when the timer measures 1 second without the voice recognition circuit (14) recognizing "high", the control circuit (6) of the parent device (1) stops the bell (16), and Similarly, the ON command signal is transmitted (F14 to 17, 3). In the control circuit (38) of the handset (2), the transmission circuit (29) is turned off by receiving the ON command signal, and then the bell (26) is driven in the same manner as described above (f).
8, 9, 2).

That is, at the time of incoming call, the bells (16) and (31) of the master unit (1) and the handset (2) are alternately driven every second, and the side not driving the bell recognizes the voice. Is the input side for. The reason why the side not driving the bell is the input side for voice recognition is as described above. By the way, when receiving an incoming call, a telephone line (4)
Since the signal of 2 seconds 16H _Z is transmitted at one-second intervals from the generally bell 2 seconds drive, it is controlled at a timing of 1 second pause, in the present invention, provided in the master unit (1) The voice recognition circuit (14) controls the bell as described above to enable voice recognition by both the master unit (1) and the handset (2).

When the voice recognition circuit (14) recognizes a "high" voice in the voice recognition mode of the base unit (1), it transmits a base unit call signal to the handset (2) and switches it. The circuit (15) is controlled to control the handsfree microphone (10) and speaker (11) amplifier (1
2) Connect (13) to the network circuit (5) and close the telephone line (4) (F6, 18-20). As a result, it becomes possible to talk on the master unit (1) side.
The control circuit (3) of the handset (2) that received the call signal from the base unit
In 8), after the standby state (the driving of the bell (31) is also stopped), the process shifts to another process (f3, 12).
When the call end key (21) is operated in the call state, the control circuit (6) of the master unit (1) opens the telephone line (4) and puts it in the standby state, and then shifts to another process. (F3, 12).

When "high" is recognized in the voice recognition mode of the handset (2), the control circuit (6) transmits a handset call signal and controls the switching circuit (15) to receive the reception circuit (7). And the transmission circuit (9) are connected to the network circuit (5), and the telephone line (4) is closed (F1).
5, 22-24). Control circuit (38) of the handset (2)
Upon reception of the handset call signal, will monitor the end call key (37), which allows the handset (2) to talk. When the end key (37) of the handset (2) is operated in the call state of the handset (2), the control circuit (38) of the handset (2) causes the master unit (1) to operate.
The end signal is transmitted, and after the standby state is entered, another process is performed (f10 to 12). Base unit (1)
When receiving the call end signal, the control circuit (6) opens the telephone line (4) and puts it in the standby state, and then shifts to another process (F25 to 27).

By the way, in F2, when it is detected that the handset (2) is being charged, the control circuit (6) of the master unit (1) does not transmit the above-mentioned ON command and OFF command, Drive the bell (16) (F2,
8). Then, by controlling the changeover switch (40), the output of the amplifier (12) of the microphone (10) is given to the voice recognition circuit (14) (F9), and "high" is set only on the master unit (1) side.
Will be detected. When "high" voice recognition is performed, F18 to 21,
Processes 26 and 27 will be performed. That is, while the handset (2) is being charged, only the base unit (1) side performs voice recognition, and when "high" is recognized, the base unit (1) side always performs a hands-free response. I have to.

The present embodiment has an advantage that it requires only one voice recognition circuit and is economical as compared with the above-mentioned embodiments.

[0043]

EFFECT OF THE INVENTION In a cordless telephone set in a call state by the voice of the called party who is receiving a call, it is clear whether the handset is in a call state or the handset is in a call state when the handset is being charged by the handset. Therefore, the user will not be confused. Further, in a cordless telephone in which the microphone of the handset faces downward to charge the handset, the handset is not put into a call state during charging. Furthermore, in a cordless telephone in which the base unit has a voice detection circuit (voice recognition circuit) whose voice detection accuracy is higher than that of the handset, the base unit detects voice during charging.

[Brief description of drawings]

FIG. 1 is a block diagram of a master device according to an embodiment of the present invention.

FIG. 2 is a block diagram of a receiver according to an embodiment.

FIG. 3 is a flowchart of a master unit according to the first embodiment.

FIG. 4 is a flowchart of the handset of the first embodiment.

FIG. 5 is a flowchart of a parent device according to the second embodiment.

FIG. 6 is a flowchart of a receiver according to a second embodiment.

FIG. 7 is a flowchart of a parent device according to a third embodiment.

FIG. 8 is a flowchart of a receiver according to a third embodiment.

FIG. 9 is a flowchart of a parent device according to the fourth embodiment.

FIG. 10 is a flowchart of the handset of the fourth and fifth embodiments.

FIG. 11 is a flowchart of a master device according to a fifth embodiment.

FIG. 12 is a block diagram of a master unit according to a sixth embodiment.

FIG. 13 is a block diagram of a child device according to a sixth embodiment.

FIG. 14 is a flowchart of a parent device according to a sixth embodiment.

FIG. 15 is a flowchart of a child device according to a sixth embodiment.

[Explanation of symbols]

1 base unit 2 handset 3 incoming call detection circuit 6 Control circuit (master unit) 10 microphone (base unit) 14 Voice recognition circuit (base unit) 22 Charge detection circuit (base unit) 24 Microphone (Handset) 30 Voice detection circuit (handset) 38 Control circuit (handset) 39 Charge detection circuit (handset)

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04M 1/60 H04M 1/00

Claims (6)

(57) [Claims] 1. A master unit connected to a telephone line, and a receiver wirelessly connected to the master unit and charged by the master unit, wherein the master unit and the receiver detect voice of a called party. If the circuit and the voice detection circuit recognize voice,
Hands-free call method to switch to hands-free call mode,
A cordless telephone having a receiving means, wherein the voice detecting circuit detects a specific voice of a called party issued when a calling signal is received, and the master unit or the handset can make an outside call. Is equipped with a charging detection circuit that detects that the handset is charging , and the handset is charging
Based on the fact that the charge detection circuit detects that
The voice detection circuit detects a specific voice of the called party when an incoming call arrives
When either of the above, either the master unit or the handset
A cordless telephone having a control circuit for setting a hands-free call state. 2. A cordless telephone set according to claim 1.
Ri, the control circuit of the handset, controls the transmission and reception means so that the handset is sending a call initiation signal to obtain the permission of a call initiation handset based on the output of the voice detection circuit of the handset to the base unit
And, the control circuit of the main unit on the basis of the call initiation signals may handset with the base unit to the handset call state Ru is sent a notification signal to grant to become call state handset
In a cordless telephone that controls the transmitting / receiving means of the master unit and the control circuit of the handset makes the handset in a hands-free call state based on the notification signal, the handset is provided with the fact that the handset is charging.
When the charging detection circuit is detected, the control circuit of the handset prevents the call start signal from being sent to the base unit.
A cordless telephone characterized in that it controls the transmitting and receiving means of the cordless telephone. 3. The cordless telephone according to claim 1,
The control circuit of the receiver controls the transmission and reception means so that the handset is sending a call initiation signal to obtain the permission of a call initiation handset based on the output of the voice detection circuit of the handset to the base unit, before
Serial control circuit of the main unit on the basis of the call initiation signals of the so that the master unit is sent a notification signal to grant that the handset is in a call state with the base unit to the handset call state in the handset
In the cordless telephone that controls the transmitting / receiving means and the receiver's control circuit makes the receiver into a hands-free call state based on the notification signal, the master unit is provided with the fact that the receiver is charging.
When the charge detecting circuit is detected, the control circuit of the master unit is transmitted to charging in a signal indicating that a charging to the handset
To control the transmitting / receiving means of the base unit so that the control circuit of the handset sends the call start signal to the base unit based on the charging signal.
Characterized by controlling the transmitting and receiving means of the handset so that it does not
To co - dress phone. 4. A cordless telephone according to claim 1.
Then, the control circuit of the handset controls the transmitting / receiving means of the handset so as to send a call start signal for requesting permission to start the call of the handset to the base unit based on the output of the voice detection circuit of the handset.
And, so that the control circuit of the main unit on the basis of the call initiation signal is sent a notification signal to grant that the handset is in a call state with the base unit to the handset call state in the handset
<br/> co controls the transmitting and receiving means of the parent unit, the control circuit of the receiver based on the notification signal is a handset to hands-free state - in dress telephone base unit that the handset is in the charging operation Prepared for
When the charge detecting circuit is detected, the control circuit of the master unit sending a master unit to not sending the notification signal to grant that handset also receive the call start signal is a call state handset
A cordless telephone characterized by controlling receiving means . 5. The cordless telephone according to claim 1.
Ri, the control circuit of the master unit sends a call start signal for notifying the call start of the master unit as well as the hands-free state the master unit based on the output of the voice detection circuit of the base unit to the handset
As described above, the control circuit of the handset based on the call start signal controls the transmitting / receiving means of the base unit, and in the cordless telephone that puts the handset into the base unit talking state, the base unit is provided with the fact that the handset is charging. Was
When the charge detection circuit detects, the control circuit of the base unit does not put the base unit into the call state even if there is an input from the voice detection circuit of the base unit, and notifies the start of the call of the base unit. A cordless telephone characterized by controlling a transmitting / receiving means of a master unit so as not to send a signal to a receiver. 6. An incoming call detection circuit for detecting an incoming call signal from a telephone line, a microphone for inputting voice to the voice detection circuit, and a switching circuit for connecting and disconnecting the microphone and the voice recognition circuit. In the cordless telephone, the base unit was provided with the fact that the handset was being charged.
When the charge detecting circuit detects, co according to claim 1, the control circuit of the main unit, characterized in that also detect an incoming signal without connecting the voice recognition circuit and the microphone - dress phone.