JP3480686B2 - 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, and more particularly, to a cordless telephone when a parent terminal makes a call in a wireless TA capable of registering an analog cordless telephone, a digital cordless telephone, or a cordless cordless handset. The present invention relates to a cordless telephone characterized by the above configuration.

[0002]

2. Description of the Related Art In a cordless telephone, a digital cordless telephone, or a wireless TA capable of registering a cordless cordless handset, normal operation is performed by using electric power supplied from the outside. FIG. 5 is a block diagram showing a typical example of a conventional cordless telephone.
0 is a power supply switching circuit 41, an auxiliary power supply 42, a wireless control unit 4
4, master unit control unit 45, handset 46, ringer 47,
The keypad 48 and the like are used, and in the event of a power failure, it operates using power supplied from an auxiliary power source built in or externally attached to the master unit. In addition, cordless telephones that do not have an auxiliary power supply realize a telephone call by using the power supply supplied from the network, which is limited to the telephone call function.

That is, the following two methods are conceivable as methods for guaranteeing a telephone call at the time of power failure by the conventional method. (1) The main unit is provided with a telephone function, and the electric power supplied from the network is used to guarantee a call. At this time, the base unit must be equipped with a handset and a keypad, and must have the function of making a call only with the base unit (the wireless part does not work). (2) Auxiliary power supply is used to supply power to the base unit in the event of a power outage, thereby guaranteeing a call by the handset (the wireless part also operates).

FIG. 6 shows the configuration of the base unit according to the conventional example shown in (1). The base unit according to this example has a handset and a keypad, but does not have an auxiliary power source. Therefore, if the external power supply is stopped during a power failure, the power source switching circuit 41
The power supplied from the network is supplied to the master unit control unit 45 by the function of, and at the same time, the power supply to the wireless control unit 44 is stopped. At this time, that is, when a call is made by the power supplied from the network at the time of power failure, the handset 46 is put in the off-hook state, the connection destination number is input from the keypad 48,
Talk after answering the connection destination, and then handset 4 after the call ends
A general procedure is to hook 6 on hook.

FIG. 7 shows the configuration of the base unit according to the conventional example shown in (2). Since the base unit according to this example does not have a handset and a keypad, when the supply of external power is stopped during a power failure, the power supply switching circuit 41 causes the auxiliary power source 42 to supply power to all parts of the base unit. Is supplied. In this case, even when there is a power failure, a call is made and a call is made using the slave unit, as in normal times.

[0006]

As described above, in order to guarantee the telephone call at the time of power failure by the method (1),
The base unit must have a handset and keypad. However, with this method, a cordless telephone that uses a cordless cordless handset for a normal call must have a handset and a keypad that are rarely used, just in case of a power failure.

In the method (2), the wireless control unit must always be supplied with power even when there is a power failure, and a large capacity auxiliary power supply is installed to ensure a sufficient talk time during a power failure. It is necessary to increase the cost and weight.

[0008]

SUMMARY OF THE INVENTION The present invention comprises an auxiliary power supply,
It consists of a wireless controller, a master unit that has a handset, or an earphone (speaker) that replaces the handset, and a removable microphone, and a cordless cordless handset. By connecting an earphone (speaker) and a microphone to the master unit, power supply to the wireless control unit is started, and after wirelessly connecting to the slave unit, a call is made using the keypad of the cordless slave unit.
When the connection destination is ringing or busy, the connection with the slave unit is disconnected and the power supply to the wireless control unit is stopped. The connection destination is a telephone call using the handset of the base unit.

According to the first aspect of the present invention, an auxiliary power supply for connecting to a network and ensuring operation during a power failure, and a wireless control that is normally powered by an external power supply and is powered by the auxiliary power supply during a power failure Part, a base unit having a handset,
In the cordless telephone consists cordless handset that comes with the base unit, during operation in said auxiliary power, when the standby state stops power supply to the radio control unit, of the Ha <br/> Ndosetto the detection of the off-hook state to start power supply to the radio control unit to operate the wireless control unit performs transmission and reception of the connection information with the network by the calling procedure of the co <br/> Doresuko machine, network when the destination is or busy calling a signal from, by cutting the connection with the cordless handset
The stops power supply to the radio control unit, the call with the connected is a cordless telephone and performing in the handset base unit has, using the cordless handset in a normal call, the base handset In a cordless telephone system that does not use a keypad, it is possible to effectively use electric energy during a power failure, and it is not necessary to provide a keypad in the base unit only to guarantee operation during a power failure.

According to the second aspect of the present invention, an auxiliary power supply for connecting to a network and ensuring operation during a power failure, and a wireless control that is normally powered by an external power supply and is powered by the auxiliary power supply during a power failure a Department, the base unit having an earphone microphone jack for plugging an earphone microphone plug earphone and microphone are connected, a cordless telephone consists cordless handset that comes with the base unit, before
During operation in the serial auxiliary power, when the standby state stops power supply to the radio control unit, the off-hook operation by plugging the earphone microphone plug to the earphone microphone jack of the base unit, to the radio controller To start feeding
The wireless control unit is operated, performs transmission and reception of the connection information between the network and by the calling procedure of the cordless handset, when the connection destination by a signal from the network is or in a busy call, the <br /> to disconnect from the cordless handset to stop power supply to the radio control unit, the call connection destination a cordless telephone, which comprises carrying out in earphone and microphone connected to said master unit Therefore, not only is it possible to effectively use electric energy during a power outage and it is not necessary to provide a keypad on the master unit, but an earphone microphone set instead of a handset may be connected only during a power outage.

[0011] The invention of claim 3, said using stop timer as a means of determining when to stop power supply to the radio control unit receives a signal that the connection destination ringing or busy from the network Sometimes start the stop timer,
3. The cordless telephone according to claim 1 or 2, wherein power supply to the wireless control unit is stopped when the timer expires. In the invention of claim 1 or 2, the power supply to the wireless control unit is stopped. Since it is performed when the stop timer expires, prompt re-calling is possible before the timer expires.

[0012] A fourth aspect of the present invention, as a call means a connection destination, a cordless telephone that uses a speaker and a microphone instead of the handset, claim 1
In the present invention, the base unit does not need to be equipped with a handset, and the handset or earphones (speakers) and microphones instead of the handset may be connected to the base unit only during a power failure.

[0013]

According to the invention of claim 5 , when it is connected to a network,
In general, an auxiliary power supply to guarantee operation during a power failure and a normal
Power is supplied from an external power source during a
The incoming wireless control unit and incoming call detection that detects incoming calls from the network.
A base unit having an output means and a switch for detecting off-hook
And a cordless cordless handset attached to the base unit.
Off-hook operation of the master unit in case of power failure
Wireless connection with the cordless cordless handset to
Sometimes said incoming call detecting means incoming detected in a cordless telephone, characterized in that even if off-hook operation of the master unit performed not connect operation of the cordless handset,
When you receive an incoming call, you do not need to connect the cordless handset because you do not need to dial the cordless handset and do not call up the cordless handset.Therefore, the auxiliary power is not consumed and the battery of the cordless handset is not consumed. Is used effectively.

When the invention of claim 6 is connected to a network,
In general, an auxiliary power supply to guarantee operation during a power failure and a normal
Power is supplied from an external power source during a
Powered wireless controller and off-hook switch
It is composed of a base unit that has a
It is a cordless phone that is made up of
Wireless connection with the cordless handset by hook operation
It was carried out, to dial from the radio connection after the cordless handset, and the cordless handset Niteko device disconnection information originating detects the handset disconnection information at the master unit, the master unit to the radio control unit in cordless telephone, characterized by stopping the power supply, by transmitting from the cordless handset disconnection information to the base unit, without performing wasteful handset connection after dialing completion, the radio control unit power supply at the master unit Since it can be stopped, the auxiliary power supply can be used effectively.

[0016] The invention of claim 7, handset disconnection information transmission operation is a cordless telephone, characterized in that an operation to turn off the handset, in the invention of claim 6, the power of the slave unit Since the operation is turned off when the handset is turned off, the battery of the handset can be used effectively, and the connection of the handset is turned off by the same operation as usual, so that the operation is unified without the user getting lost.

[0017] The invention of claim 8, wherein the detecting means slave machine cutting information, a means for radio waves from the cordless handset received in the master unit detects that the weakened than the threshold value A cordless phone,
The invention of claim 6 has the same characteristics as in claim 7 .

[0018] The invention of claim 9, slave machine cutting information, said possible a cordless telephone according to claim 6, wherein a digital data received from the cordless handset, in the invention of claim 6 , When the dial data stored in the phonebook is specified on the cordless handset, after the specified dial data is transmitted from the cordless handset, the disconnection data is sent immediately to enable the connection termination operation. Therefore, it is possible to effectively use the auxiliary power supply of the master unit and the battery of the slave unit used for radio connection.

When the invention of claim 10 is connected to a network,
Both have an auxiliary power supply to guarantee operation during a power failure, and a
Power is supplied from an external power source at all times, and from the auxiliary power source during a power failure
The wireless control unit that receives power and the switch that detects off-hook
A base unit with a switch and multiple cordless children attached to the base unit
Consists machine, the off-hook operation of the master unit during a power failure, performs a wireless connection with the cordless handset, a cordless telephone for performing dial from the radio connection after the cordless handset, the cordless handset is available multiple connections so,
The wireless control unit may include all the cordless slave units or one of the cordless slave units.
Wherein characterized by calling the cordless handset parts, when a plurality of the slave unit connectable to a cordless telephone, wherein the call all handsets, or a portion of the handset
In addition , since multiple slave units are called without specifying a slave unit that is close to the user, the user can use it by connecting the nearby slave units among the called slave units, which is convenient. It improves the sex.

[0020]

1 is a block diagram of a first embodiment of the present invention. In FIG. 1, a master device 10 includes a power switching unit 11, an auxiliary power supply 12, a wireless power control unit 13, a wireless control unit 14, a master device control unit 15, a handset 16, and a ringer 1.
7 and hook switch 19. The master unit does not need a keypad or dial, but it is of course possible to provide it. The power supply switching circuit 11 determines the presence or absence of an external power supply, and when the power supply from the external power supply is cut off during a power failure, supplies the power from the auxiliary power supply 12 to the master unit. The auxiliary power supply 12 is composed of a primary battery, a secondary battery, or a large-capacity capacitor, and is a power supply that supplies power to the base unit when power is not supplied from the outside. The wireless power control unit 13 controls on / off of power supply to the wireless control unit according to an instruction from the master unit control unit 15, and the wireless control unit 14
It is a circuit that controls the wireless unit of the master unit. Base unit control unit 15
Is a circuit other than the wireless part of the base unit, and I / F with the network,
Performs protocol processing and application processing.

Normally, when the power is supplied from the outside, the power supply switching circuit 11 supplies the power supplied from the external power supply to the entire parent device. At this time, the wireless power control unit 13 operates so as to supply power to the wireless control unit 14 as well, but at the time of power failure, the master unit is in the standby state in the following procedure.

When the power supply from the external power supply is stopped at the time of power failure, the power supply switching circuit 11 supplies the power to the master unit with the auxiliary power supply 1.
Switch to supply from 2. The base unit controller 15
When the power supply from the auxiliary power supply is detected, the wireless power supply controller 13 is instructed to stop the power supply to the wireless controller 14. The wireless power control unit 13 stops power supply to the wireless control unit 14 according to an instruction from the master unit control unit 15. In the standby mode, the master unit control unit 15 operates the I / F and protocol processing unit with the network, and when the call is received from the network, the ringer 1
Ringing 7 indicates an incoming call and the speaker speaks via handset 16.

Next, FIG. 2 shows a flow when the speaker makes a call. The calling procedure according to the present invention will be described with reference to FIGS. By putting the handset 16 in the off-hook state (step S1), the master unit control section 15 sends a dial tone to the handset (step S2). At the same time, the parent device controller 15 instructs the wireless power controller 13 to supply power to the wireless controller 14 (step S).
3).

When power is supplied and the radio control unit 14 starts operating, a call is possible with the slave unit, and the speaker performs a calling process by the normal calling procedure using the slave unit (step S).
4). After that, when the master unit receives a signal indicating that the connection destination is being called by the network (step S5), the master unit controller 15 sends a ringing tone to the handset 16 (step S6), and at the same time, the wireless controller 14 is notified of the slave unit. Is instructed to disconnect the call (step S7).

When the call with the slave unit is disconnected, the master unit control unit 15 instructs the wireless power supply control unit 13 to stop the power supply to the wireless control unit 14, and then the wireless power supply control unit 1
3 stops the power supply to the wireless controller 14 (step S8). When the connection destination is a telephone call, a telephone call can be made using the handset 16 (step S9). When the call ends, the speaker returns to the initial state by putting the handset in the on-hook state (step S10).

In step S5, if the connection destination is busy, the master unit controller 15 sends a busy tone to the handset 16 (step S11) and disconnects the call with the slave unit. It issues an instruction to the wireless controller 14 (step S12). After that, the wireless power control unit 13 stops the power supply to the wireless control unit 14 (step S13), and the speaker puts the handset in the on-hook state,
It returns to the initial state (step S14).

As described above, the power supply to the wireless control unit is limited only during the calling process, and the power supply to the wireless control unit is stopped during the call and standby, so that the master unit Power consumption can be reduced.

In the first embodiment, the power supply to the radio control unit 14 after the calling process is turned off after confirming that the call is being made or busy, but as the second embodiment, the call is made again. In order to make a call promptly, it is possible to use a timer and cut off the power supply to the wireless control unit 14 after the expiration.

The flow at this time is shown in FIG. By putting the handset 16 in the off-hook state (step S21), the master unit control section 15 sends a dial tone to the handset (step S22). At the same time, the parent device control unit 15 checks the state of the wireless control unit 14 (step S23), and if the wireless control unit is not supplied with power, the wireless power supply control unit 13 supplies power to the wireless control unit 14. Instruct to supply (step S24).

When the wireless controller 14 starts operating, a call is possible with the child device, and the speaker uses the child device to perform a calling process according to a normal calling procedure (step S25). After that, when the base unit receives the signal that the network is calling the connection destination,
The base unit controller 15 sends a ringing tone to the handset 16 (step S27), and at the same time, instructs the wireless controller 14 to disconnect the call with the handset (step S28).

When the call with the slave is disconnected, the master controller 15 activates the wireless controller disconnect timer (step S2).
9). When the connection destination is a telephone call, a telephone call can be made using the handset 16 (step S30). When the call ends, the speaker returns to the initial state by putting the handset in the on-hook state (step S31). When the wireless control disconnect timer expires during the call or after the call ends, the master control unit 15 instructs the wireless power control unit 13 to stop the power supply to the wireless control unit 14,
After that, the wireless power control unit 13 stops the power supply to the wireless control unit 14.

When the connection destination is busy, the master unit control unit 1
5 sends a busy tone to the handset 16 (step S32), and instructs the wireless controller 14 to disconnect the call with the handset (step S33). When the call with the slave is disconnected, the master controller 15 activates the wireless controller disconnect timer (step S34), and the speaker returns to the initial state by putting the handset in the on-hook state (step S35). .

When the wireless control disconnect timer expires after the call ends, the master controller 15 instructs the wireless power controller 13 to stop the power supply to the wireless controller 14, and then the wireless power controller 13 Stops the power supply to the wireless controller 14.

In the second embodiment, since the power supply to the radio control unit is stopped by the expiration of the timer, it is possible to make a quick call again before the expiration of the timer.

FIG. 4 is a block diagram of the third embodiment of the present invention. In the third embodiment, in addition to the ringer 17 ringing at the time of an incoming call in the first and second embodiments, an incoming call detection unit 20 for detecting an incoming call from the network is provided, and the master unit control unit receives this signal. Recognize that there is an incoming call. In the power failure state, connection to the child device is not performed and the user waits for off-hook. When the user inserts the plug of the earphone / microphone into the earphone / microphone jack 22 (with a plug insertion detection switch) of the base unit, the switch for detecting this is turned on, which causes the base unit control unit 15 to recognize it as off-hook, and And connect the voice to the earphone microphone. At this time, the off-hook is detected, but since it is known from the incoming call detection that it is not the calling operation, the dial operation is not necessary and the connection to the child device is not performed. Needless to say, a speaker or the like can be used instead of the earphone of the earphone microphone.

When making a call during a power failure, the user sets the earphone / microphone jack (with a plug insertion detection switch) 22 of the parent device.
When the plug of the earphone microphone is inserted, the switch for detecting the plug is turned on, whereby the base unit control unit 15 recognizes that it is off-hook and captures the line. On the other hand, power is supplied from the auxiliary power source to the wireless unit, all the slaves are called all at once to be in an incoming state, and only the slaves for which the user has performed a response operation are connected. This is for dialing from the child device. The user dials from the child device. At this time, the telephone directory data can be designated. The master unit receives the dial data from the slave unit and sends out a predetermined (pulse or tone) dial to the line. After dialing, the user presses the on-hook button to disconnect the slave unit. The master unit receives the data for disconnecting from the slave unit and disconnects from the slave unit. At this time, the sound of the line and the sound of the earphone microphone are mutually connected. This is because of the call.

Whether the call is originating or terminating, the user who has ended the call pulls out the earphone microphone plug from the earphone microphone jack, the switch is turned off, and the parent machine disconnects the line by on-hook.

In the above description, the on-hook button is pressed on the child device to indicate that the dialing has been completed on the child device, and this is transmitted to the parent device by the data to disconnect the connection with the child device. An electric field strength detection unit 21 for detecting the strength of the electric wave from the slave unit in the master unit by performing an operation to turn off the power in
By providing the radio wave from the slave unit by providing the above, the master unit can determine that the dialing by the slave unit is completed.

Further, when the telephone book data is designated, the dial data can be transmitted when the transmission of the data in the telephone book to the master unit is completed, and therefore, without waiting for the user's instruction,
The handset may immediately perform on-hook processing.

[0040]

By applying the present invention, the following effects can be expected in the operation during a power failure. (1) In a cordless telephone system that uses a slave unit during a normal call and does not use a master unit, there is no need to provide a keypad to the master unit only to guarantee operation during a power failure.

(2) Since power is supplied to the radio control section only when a call is made, power consumption can be reduced in the event of a power failure and long-time operation using an auxiliary power source can be guaranteed.

(3) The keypad of the handset is used to enter the destination telephone number, but the calling procedure is the same as the calling procedure from the normal handset, so a special handset is required. Without
Any child device that can be registered in the parent device can be used.

(4) According to the invention of claim 1, in the cordless telephone system which uses the handset during normal communication and does not use the handset and keypad of the base unit, the battery energy during power failure can be effectively used. In addition, it is not necessary to equip the main unit with a keypad only to guarantee the operation at the time of power failure.

(5) According to the second aspect of the present invention, not only the battery energy during a power failure can be effectively used and it is not necessary to equip the master unit with a keypad, but the earphone microphone set which replaces the handset is powered off. You only have to connect at the time.

(6) According to the third aspect of the invention, since the power supply to the wireless control unit is stopped by the expiration of the stop timer, it is possible to promptly call again before the expiration of the timer.

(7) According to the invention of claim 4, it is not necessary to always have a handset in the base unit, and it is possible to talk by inserting the earphone microphone set used in a mobile phone or the like into the base unit. Since the handset only needs to be connected to the base unit in the event of a power failure, the footprint of the base unit does not increase.

[0047]

( 8 ) According to the invention of claim 5 , when an incoming call is received, the dial operation is not required, so that it is not necessary to connect the slave unit and the slave unit is not called, so that the auxiliary power source is not consumed, Further, since the battery of the child device is not consumed, the battery energy during power failure can be effectively used.

( 9 ) According to the inventions of claims 6 , 7 and 8 ,
By transmitting the disconnection information from the slave unit to the master unit, the wireless unit power supply in the master unit can be stopped without making unnecessary connection to the slave unit after dialing, so that the auxiliary power supply can be effectively used. Also, since the slave unit is disconnected by the same operation as usual, there is an advantage that the user can do it without hesitation and the operability is unified.

( 10 ) According to the inventions of claims 7 and 8 , since the connection is cut off by turning off the power supply of the slave unit, the battery of the slave unit can be effectively used, and further, the dial operation is performed even in the master unit. The end can be detected.

( 11 ) According to the invention of claim 9 , when the dial data stored in the telephone directory is designated by the slave unit, immediately after the designated dial data is transmitted from the slave unit. The connection end operation can be enabled by sending the disconnection data to, and the auxiliary power source of the master unit and the battery of the slave unit used for radio wave connection can be effectively used.

( 12 ) According to the tenth aspect of the present invention, since a plurality of slave units are called without specifying the slave unit in the vicinity of the user, the user is close to the called slave units. It can be used by connecting and operating the cordless handset, improving convenience.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a base unit of a cordless telephone according to the present invention.

FIG. 2 is a flowchart showing the operation of the first embodiment of the cordless telephone of the present invention.

FIG. 3 is a flowchart showing an operation of the second embodiment of the cordless telephone of the present invention.

FIG. 4 is a block diagram showing a third embodiment of the parent device of the cordless telephone of the present invention.

FIG. 5 is a block diagram of a base unit of a conventional cordless telephone.

FIG. 6 is a block diagram of a base unit of a conventional cordless telephone.

FIG. 7 is a block diagram of a base unit of a conventional cordless telephone.

[Explanation of symbols]

10 ... Master, 11 ... Power supply switching circuit, 12 ... Auxiliary power supply, 1
3 ... Wireless power source control unit, 14 ... Wireless control unit, 15 ... Master device control unit, 16 ... Handset, 17 ... Ringer, 19 ... Hook switch, 20 ... Incoming call detection unit, 21 ... Radio wave intensity detection unit, 22 ... Earphone microphone Jack (with plug insertion detection switch).

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04M 1/00 H04M 1/24-1/62 H04M 1/66-1/82 H04B 7/24-7/26 H04Q 7 / 00-7/38

Claims (10)

(57) [Claims] 1. A handset, which is connected to a network and includes an auxiliary power supply for ensuring operation during a power failure, a wireless control unit that is normally powered by an external power supply and is powered by the auxiliary power supply during a power failure, and a handset. a base unit having, in a cordless telephone consists cordless handset that comes with the base unit, during operation in said auxiliary power, when the standby state stops power supply to the radio control unit, the handset the detection of the off-hook state by operating the start the power supply to the radio control unit said <br/> wireless control unit performs transmission and reception of the connection information with the network by the calling procedure of the cordless handset, from the network when the destination is or busy calling in the signal, and disconnects the connection with the call <br/> Doresuko machine stops power supply to the radio control unit, the parent calls the destination the Handose <br/> Tsu the machine has Cordless telephone and performing in. 2. An earphone, which is connected to a network, and which has an auxiliary power source for ensuring operation during a power failure, a wireless control unit which is normally powered by an external power source and is powered by the auxiliary power source during a power failure, a base unit having an earphone microphone jack for plugging an earphone microphone plug microphone is connected, in a cordless telephone consists cordless handset that comes with the base unit, during operation in the auxiliary power, the standby state the stops power supply to the radio control unit, the off-hook operation by plugging the earphone microphone plug to the earphone microphone jack of the master unit, is operated to start the power supply to the radio control unit and the radio controller when performs transmission and reception of the connection information between the network and by the calling procedure of the cordless handset, the connection destination by a signal from the network is at or busy calling To Rutoki, before
Cordless telephone to disconnect from the serial cordless handset to stop power supply to the radio control unit, the call with the destination and performing the connected earphone and microphone in the base unit. Wherein the stop timer when said using stop timer as a means of determining when to stop power supply to the radio control unit, receives the signal with which it is attached ringing or busy from the network Start, and when the timer expires
The cordless telephone according to claim 1, wherein power supply to the wireless control unit is stopped. 4. As a call means a connection destination, a cordless telephone according to claim 1 Symbol placement using a speaker and a microphone instead of the hand <br/> set. 5. When connected to a network and operating during a power failure
Power supply to guarantee the
Powered by the auxiliary power supply in case of power failure
, An incoming call detection means for detecting incoming calls from the network, and
Attached to the base unit and the base unit that has a switch that detects
It is a cordless phone that is composed of cordless handsets.
In case of power failure, the cordless operation can be performed by off-hook operation of the base unit.
Performs wireless connection with the slave unit, the said incoming call detecting means <br/> call detection in the event of a power failure before being off-hook operation of the master unit performed
Cordless telephone, characterized in that does not perform the connecting operation of the serial cordless handset. 6. An operation in case of a power failure while being connected to a network
Power supply to guarantee the
Powered by the auxiliary power supply in case of power failure
And a parent device having a switch for detecting off-hook,
Cordless consisting of cordless cordless handset attached to the machine
A cordless phone, which can be operated by off-hook operation of the base unit during a power failure
Performs wireless connection to the handset, the dial from the cordless handset after wireless connection to the cordless handset Niteko device disconnection information originating detects the handset disconnection information at the master unit,
A cordless telephone characterized in that a master unit stops power supply to the wireless control unit. 7. The cordless operation is performed when the cordless handset disconnection information transmission operation is performed.
The operation for turning off the power of the slave unit.
Cordless telephone set forth in item 6 . Detecting means 8. slave machine cutting information, radio wave from the cordless handset received in the master unit is characterized in that it is a means for detecting that the weakened than the threshold value claim Cordless telephone set forth in item 6 . 9. The cordless telephone according to claim 6 , wherein the cordless handset disconnection information is digital data received from the cordless cordless handset. 10. The system is connected to a network and operates in the event of a power outage.
Auxiliary power supply to guarantee the work
Wireless control that is supplied with power from the auxiliary power supply when power is supplied
And a base unit having a switch for detecting off-hook,
It is composed of a plurality of cordless handset that comes with the master unit, the off-hook operation of the master unit during a power failure, performs a wireless connection with the cordless handset, a cordless telephone for performing dial from the radio connection after the cordless handset , The cordless slave unit can be connected to a plurality of the wireless control unit
All of the cordless handset or part the code,
Cordless telephone, characterized in that it calls the less the child device.