JPH05167523A - Cordless telephone set capable of inter-slave set talking - Google Patents

Abstract

PURPOSE:To attain the talking between slave sets not through a master set by providing a control section applying switching control to a switching section in the case of the connection to an optional slave set so as to connect a slave set connection radio equipment section and a speech circuit to the cordless telephone set. CONSTITUTION:A control section 5 collates a fetched ID code with an ID code set in itself and judges that a reception radio wave comes from other slave set of this cordless telephone set when they are coincident. The control section 5 applies switching control to transmission changeover switches 71, 72 so that an H level switching control signal is outputted through them, for example to make terminals (a)-(c) of the switches 71, 72 connect with each other respectively, thereby setting a speech path for inter-slave set communication. However, when the output of a master set carrier sense section 23 is at an H level, that is, when the master set is busy or called, the control section 5 controls the switches 71, 72 so that they respectively output an L level switching control signal, thereby avoiding disturbance onto the connection to the master set.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a master unit connected to a telephone line, and a plurality of slave units each of which is wirelessly connected to the master unit by a wireless line by a master unit connecting wireless device section. The present invention relates to a cordless telephone, and more specifically, to a cordless telephone that enables a telephone call between handset units without going through a base unit.

[0002]

2. Description of the Related Art In recent years, with the diversification of lifestyles, telephones have become multifunctional, and cordless telephones in particular have been rapidly spreading. In such a cordless telephone,
Some are equipped with a plurality of cordless handsets, and it is possible to talk between the cordless handsets.

In this case, a call between the slaves is always performed via the master. That is, the wireless device unit of the child device always communicates only with the parent device, and by using the wireless device unit in the parent device, the child device can capture the telephone line,
It is possible to talk between handset units.

[0004]

As described above, in the conventional cordless telephone, if the number of wireless device units built in the master unit is not equal to the number of slave units, one wireless unit and one master unit are provided. There is a problem that while the wireless communication with the slave unit is not possible, the other slave units cannot communicate independently with each other, and the usable range of the slave unit is always limited by the master unit with which the slave unit is connected. Also, since the main power source of the parent machine depends on the household power source, when the power failure occurs, the parent machine becomes unusable,
As a result, there was also a problem that the child machine became unusable.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a child without going through the parent machine even if the parent machine is in an unusable state due to a power failure or a telephone line capture by the child machine. It is to provide a cordless telephone that enables telephone calls between machines.

[0006]

In order to solve the above-mentioned problems, a cordless telephone according to the present invention, which is capable of performing inter-slave communication, is a master unit connected to a telephone line and a wireless unit for connecting a master unit. In a device comprising a plurality of slaves, each of which is wirelessly connected to the master by a line, each slave has a slave-connecting wireless device section for connecting a wireless line to any slave. , A switching unit for switching the connection between the communication circuit inside the slave unit and the master unit connection wireless device unit or the slave unit connection wireless device unit, and when connecting to the master unit, switching control of the switching unit. When connecting the master unit connecting wireless device unit and the call circuit, and connecting to an arbitrary slave unit, the switching unit is controlled to switch the slave unit connecting wireless device unit and the call circuit. A control unit to be connected is provided.

[0007]

When the inter-slave call is selected in any slave, the controller of the slave confirms that the slave is unused and then controls the switching of the slave to connect the slave wireless device. Connect the section and the internal communication circuit. After this, the extension calling operation is performed by designating the slave unit to be called. On the other hand, in the called slave unit, when the call is received, the control unit confirms the non-connection with the master unit, and then controls the switching unit to switch between the wireless device unit for connecting the slave unit and the internal communication circuit. Connect. As a result, a communication path is formed between the slaves without going through the master.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an electrical structure of a cordless telephone handset capable of performing inter-handset communication according to the present invention.

In FIG. 1, a transmitting unit (hereinafter referred to as a master unit transmitting unit) 21 of a master unit connecting wireless device unit is provided in an antenna 1 for wirelessly connecting a master unit and other slave units (not shown).
And the output of the transmitting unit (hereinafter referred to as the transmitting unit for slave unit) 31 of the wireless device unit for connecting to the child device and the receiving unit (hereinafter, referred to as the receiving unit for the parent device) 22 of the wireless device unit for connecting to the parent device 22. The input and the input of a receiver (hereinafter, referred to as a receiver for a slave) 32 of the wireless device for connecting a slave are connected to each other.

The input of the transmitter 21 for the master unit is connected to one fixed terminal b of the transmitter switch 71, and the input of the transmitter 31 for the slave unit is the other fixed terminal of the transmitter switch 71. connected to c. In addition, the transmission switch 7
The output of the transmitter 81 of the communication circuit 8 is guided to the movable terminal a of No. 1, and the output of the microphone 9 built in the handset (not shown) is guided to the transmitter 81.

The output of the reception unit 22 for the base unit is connected to one fixed terminal b of the reception changeover switch 72 and the reception data demodulation unit 4 for demodulating the reception data, and the output of the reception unit 32 for the handset unit. Is connected to the other fixed terminal c of the reception changeover switch 72 and the reception data demodulation section 4. The movable terminal a of the reception changeover switch 72 is guided to the reception section 82 of the communication circuit 8, and the output of the reception section 82 is guided to the speaker 10 incorporated in the handset (not shown).

On the other hand, the output of the carrier sense unit 23 for the master unit which detects the presence or absence of the received signal of the receiver unit 22 for the master unit, and the carrier sense unit for the slave unit which detects the presence or absence of the received signal of the receiver unit 32 for the slave unit. The output of 33 is guided to the control unit 5 that controls the operation of the entire slave unit. Further, the output of the received data demodulation unit 4 and the output of the key operation unit 6 for dial operation, mode selection, etc. are led to the control unit 5. The transmission data output from the control unit 5 is guided to the transmitter unit 81, and the switching control signal is guided to the switching control inputs of the transmitter switch 71 and the receiver switch 72. There is.

In the above structure, the control unit 5 includes software operating on a microcomputer.

The cordless telephone of the present invention comprises a plurality of cordless handsets having such a configuration.

Next, in the cordless telephone of the present invention including the cordless handset having the above-mentioned constitution, the operation of the telephone call between the cordless handsets, the operation flowchart of the cordless handset of the transmitting side shown in FIG. 2 and the operation of the cordless handset of the receiving side shown in FIG. This will be described with reference to the flowchart.

When a mode for designating the inter-slave communication and the partner's slave is selected from the key operation section 6 in any slave, the control section 5 indicates, for example, "H" level indicating the inter-slave communication. Signal and a signal designating the partner's handset (steps S1 and S2). By receiving these signals, the control unit 5 uses and does not use the base unit transmission unit 21 and the base unit reception unit 22, and the use and non-use of the base unit transmission unit 31 and the base unit reception unit 32. Determining use (step S
3).

This determination is made by the base unit carrier sense unit 23.
Also, it is determined whether each output of the carrier sense unit for slave unit 33 is the “H” level in use or the “L” level not in use. And either output is "H"
When it is at the level, the control unit 5 determines that the inter-slave communication is impossible (step S8), and returns to the initial state.

On the other hand, when it is determined in step S3 that all the outputs are at the "L" level, the control section 5 first sends, for example, the "H" level switching control signal to the transmitting switch 71 and the receiving switch 72. To control the changeover of the changeover switches 71 and 72, and the terminals ac of the transmission changeover switch 71 and the reception changeover switch 72.
The terminals a to c are connected and the communication path is set to the inter-slave communication (step S4). After that, the control unit 5 sends an ID code (this ID code is a unique code to the cordless telephone) indicating that the call is between the handset units and a designation code (which specifies the partner handset unit). Both are "H"
(It is a binary signal string of “L”) is sent to the transmitter 81.

As a result, the transmission data of the ID code and the designated code is sent to the transmitter 81, the terminals ac of the transmitter changeover switch 71, and the transmitter 31 for the slave unit, and transmitted from the antenna 1 (step). S5).

On the other hand, the control unit 5 of the called slave unit
Always monitors the output of the carrier sense unit 23 for the master unit and the output of the carrier sense unit 33 for the slave unit to determine the reception state of the slave unit. At this time, when the radio waves transmitted from the slave unit are received by the slave unit receiving unit 32 in the standby state in which the outputs of both carrier sense units 23 and 33 are both at the “L” level, the slave unit carrier sensing unit 3
Since the output of No. 3 becomes the "H" level, the control unit 5 receives the "H" level signal and recognizes that the received radio wave is a telephone call between handset units (step S1).
1). At this time, the control unit 5 confirms that the output of the carrier sense unit 23 for the master unit is at the “L” level, and the ID received by the receiver unit 32 for the slave unit and demodulated by the received data demodulation unit 4. The code and the designated code are fetched (steps S12 and S13).

The control unit 5 collates the fetched ID code with the ID code set for itself, and if they match, the received radio wave is from the other handset of the cordless telephone. To judge. Next, the control unit 5 checks whether the fetched designated code is the cordless handset designated code assigned to itself, and if they match, shifts to a cordless handset call (steps S14 and S15).

That is, the control section 5 outputs a switching control signal of, for example, an "H" level to the transmission switch 71 and the reception switch 72, and the respective switches 71,
The switching control of 72 is performed to connect the terminals ac of the transmission switch 71 and the terminals ac of the reception switch 72, and the communication path is set to the inter-slave communication. However, when the output of the carrier sense unit 23 for the base unit is at the "H" level, that is, when the call is being made to or called from the base unit, the control unit 5 causes the changeover switches 71 and 72 to have the "L" level. Output the respective switching control signals to control so as not to hinder the connection with the master unit.

After that, the control section 5 sends a call enable confirmation signal (this signal is a binary signal string of "H" and "L") to the sending section 81, and at the same time, each changeover switch 71. , 72 fixed connection. As a result, the transmission data of the call enable confirmation signal is sent to the transmitter 81, the terminals ac of the transmitter switch 71, and the transmitter 31 for the handset, and transmitted from the antenna 1 (step S16).

On the other hand, in the calling handset, the call enable confirmation signal is received by the handset receiver 32, demodulated in the received data demodulator 4, and then fetched in the controller 5. The control unit 5 confirms by the call enable confirmation signal that the call is enabled (step S6), and fixes the connection of the changeover switches 71, 72. As a result, the telephone call between the child devices is started (step S7,
S17).

The frequency band of the transmission / reception radio waves used in the wireless device for connecting the slave unit is not limited to the frequency band used in the cordless telephone, but may be the frequency band used in other wireless devices.

[0027]

According to the cordless telephone of the present invention, which is capable of performing inter-slave communication, a slave-unit connecting wireless device unit is provided in the slave unit, in addition to the conventionally-provided wireless device connecting unit. As a result, the following various effects are achieved. (1) Since the callable distance is not limited to the base unit and depends on the distance between the handset units, the usage patterns can be diversified. (2) Since the cordless handset does not use household power as the main power source,
Even if the wireless device of the parent device becomes unusable due to a power failure or the like, the child devices can talk with each other. (3) When there are three or more handset units, even if one of the handset units is in a call with the base unit or in a line capturing state and the radio unit of the base unit is used, the remaining handset units remain. You can talk with each other.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electric configuration of a cordless telephone of a cordless telephone capable of making a telephone call between cordless handsets according to the present invention.

FIG. 2 is a flowchart for explaining an operation of a transmitting side child device.

FIG. 3 is a flowchart for explaining an operation of a reception-side child device.

[Explanation of symbols]

 5 control unit 31 transmitter unit for slave unit (transmitter unit of wireless device unit for connecting slave unit) 32 receiver unit for remote unit (receiver unit of wireless device unit for connecting slave unit) 71 transmission switch 72 reception switch

Claims (1)

[Claims] 1. A cordless telephone comprising a master unit connected to a telephone line and a plurality of slave units each wirelessly connected to the master unit by a wireless line by a master unit connecting wireless device unit. The cordless handset is a cordless handset connection radio unit that connects a wireless line to an arbitrary cordless handset, a communication circuit inside the cordless handset and the cordless handset connection radio unit or the cordless handset connection radio unit. And a switching unit for switching the connection between the master unit and the switching unit, switching control of the switching unit to connect the wireless device unit for connecting the parent unit and the call circuit, to connect to any slave unit In this case, a cordless telephone capable of performing inter-slave communication, comprising: a switching unit that controls switching of the switching unit to connect the wireless device unit for connecting the slave unit to the communication circuit.