JPH05153207A - Codeless telephone set - Google Patents

Abstract

PURPOSE:To realize multiple people calls which simultaneously use plural slave units more than the number of radio units incorporated in a master unit with the master unit being left as it is by providing the radio units having a transmission/reception frequency relation which is the same as that for the master unit for the slave units. CONSTITUTION:The radio unit for master unit is incorporated in the slave unit 11 in addition to the radio unit for slave unit. The slave unit 11 receives a radio wave F2 from the slave unit 12, demodulates it into sound, synthesizes it with sound input from a microphone in the slave unit itself 11 in a sound part based on the control of a control part and transmits it to the master unit 10 by a frequency F1. On the other hand, the slave unit 11 receives and demodulates the radio wave of a frequency f1 from the master unit 10, synthesizes it with sound input from the microphone of the slave unit 11 itself in the sound part and transmits it to the slave unit 12 by a frequency f2. The slave unit 11 synthesizes demodulation sound from the master unit 10 and the salve unit 12 in the sound part and outputs it from a speaker. Thus, the sound of a user in the salve unit 11 is synthesized with sound which is received/ demodulated from the other slave unit 12 and it is transmitted. Thus, the multiple people calls which simultaneously use the plural slave units can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone having a plurality of cordless handsets, in which a plurality of cordless handsets can be connected to one parent device.

[0002]

2. Description of the Related Art FIG. 3 shows an example of the construction of a conventional cordless telephone handset. In FIG. 3, 1 is a wireless unit,
2 is a control unit that controls the wireless unit 1 and the audio unit 3 based on the operation of the operating unit 5, 5 is a wireless device for a slave unit in the wireless unit 1, 8 is a speaker driven by the output of the audio unit 3, and 9 is A microphone that inputs a voice and outputs the voice to the voice unit 3 is an antenna connected to the wireless unit 1.

Next, the operation of the above conventional example will be described. When the user of the slave unit generates a voice toward the microphone 9, the output of the microphone 9 is sent to the voice unit 3, and the control unit 2 controls the wireless unit 1 so that the antenna 7 wirelessly outputs voice. (Not shown) is transmitted at the upstream frequency F, and the voice from the master unit is received by the antenna 7 at the downlink frequency f, the audio circuit 3 is driven by the control of the control unit 2, and the speaker 8 outputs the signal from the master unit. The message is generated by voice.

Thus, the radio unit 1 transmits to the master unit at the upstream frequency F and receives the downlink frequency f transmitted from the master unit. The master unit also has the same configuration, but the wireless unit 1 transmits f to the slave unit and receives F from the slave unit.

As described above, even in the cordless telephone of the above conventional example, transmission and reception between the slave unit and the master unit are performed at different frequencies, and one master unit communicates with a plurality of slave units. It can be carried out.

[0006]

However, in the above configuration, the maximum number of slaves that can be used at the same time is determined by the number of radios with built-in masters. There is a problem that it is difficult to add a radio with a built-in base unit.

The present invention solves the problems of the prior art as described above, and provides an excellent cordless telephone capable of increasing the number of slave units that can be simultaneously used while the master unit remains in the existing state. With the goal.

[0008]

In order to achieve the above object, the present invention provides a slave unit with a radio having the same transmission / reception frequency relationship as that of the master unit so that radio waves from other slave units can be transmitted. The device receives and demodulates it, synthesizes it with the voice input from the microphone, and transmits it to the parent device by the wireless device provided in the child device.

[0009]

Therefore, according to the present invention, the slave unit having the radio unit for the master unit demodulates the transmissions from the other slave units, synthesizes them, and retransmits them, thereby simultaneously using the slave units. It has an effect that a multi-party call can be realized.

[0010]

FIG. 1 shows the construction of a cordless telephone handset according to an embodiment of the present invention. In FIG.
Reference numeral 1 is a wireless unit, and 2 is a control unit that controls the wireless unit 1 and the voice unit 3 by operating the operation unit 4. 2 in radio section 1
One wireless device is provided, 5 is a wireless device which is a second wireless means for transmitting and receiving to and from another slave device, and 6 is a first wireless device which is transmitting and receiving to and from the master device. It is a radio.

The slave radio unit 5 transmits to the master unit (not shown) at the upstream frequency F and receives the downlink frequency f transmitted from the master unit. Further, the master unit radio 6 transmits at the frequency f and receives at the frequency F. In addition, 7
Reference numerals a and 7b are antennas respectively connected to the wireless device 5 for the child device and the wireless device 6 for the parent device.

Next, the operation of the first embodiment will be described with reference to the operation explanatory diagram of FIG. In FIG. 2, 1
Reference numeral 0 is a master unit connected to the central office line, and has only one master unit radio. Reference numeral 11 is a slave unit of the embodiment shown in FIG.
12 is a conventional slave unit. First, while the master device 10 and the slave device 11 are talking on the up frequency F1 and the down frequency f1,
To call the child machine 12. An upstream frequency F2 and a downstream frequency f2 different from the upstream frequency F1 and the downstream frequency f1 are used between the slaves 11 and 12.

The handset 11 receives the radio wave (F2) from the handset 12 and demodulates it into a voice, and under the control of the control part 2, the voice part 3 synthesizes the voice input from the microphone 9 of the handset 11 itself. And transmits to the base unit 10 at the frequency F1, and on the contrary receives and demodulates the radio wave of the frequency f1 from the base unit 10, and the voice unit 3 synthesizes it with the voice input from the microphone 9 of the handset 11 itself. 12
To the frequency f2. In the slave unit 11, the audio unit 3 synthesizes the demodulated voices from the master unit 10 and the slave unit 12, and the speaker 8 is used.
Output to.

As described above, according to the above-described embodiment, by providing the slave unit with the radio having the same transmission / reception frequency relationship as that for the master unit, the existing master unit is used as it is and the slave unit is simultaneously used. A multi-party call can be realized.

In the above embodiment, the case where the master device 10 has only one master wireless device has been described, but it may have a plurality of master wireless devices.

In addition, the case where the total number of the slaves 11 is one and the number of the slaves 12 is two has been described as an example. However, the number of slaves may be further increased, or a plurality of slaves may be constituted by only the slaves 11. It goes without saying that it is good.

[0017]

As is apparent from the above-described embodiment, the present invention provides a slave unit with a radio unit for the master unit, and receives the voice of the user of this slave unit and other slave units.・ By synthesizing and transmitting the demodulated voice, it is possible to realize multi-party call using multiple slaves at the same time.

Further, even if the cordless telephone set is added to the existing cordless telephone in the same manner as the conventional cordless telephone, the number of cordless handsets that can be used at the same time can be increased and the system function can be improved relatively easily. Can be made

[Brief description of drawings]

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

FIG. 2 is an operation explanatory diagram of the cordless telephone according to the embodiment of the present invention.

FIG. 3 is a block diagram of a cordless telephone handset of the related art.

[Explanation of symbols]

 1 wireless unit 2 control unit 5 wireless device for slave device 6 wireless device for master device 10 master device

Claims (3)

[Claims] 1. A cordless telephone comprising a master unit and a plurality of slave units, wherein at least one slave unit has a first wireless means for transmitting and receiving data to and from the master unit, and another slave unit. Second wireless means for transmitting and receiving data between them, the first wireless means receiving and demodulating the radio wave transmitted from the parent device, and the other child device via the second wireless means. And a second wireless unit that receives and demodulates a radio wave transmitted from the other slave unit, and transmits the received radio wave to the master unit via the first wireless unit. 2. A signal obtained by receiving and demodulating a radio wave from a parent device or another child device is combined with an audio signal input to the child device to be combined with the second wireless means or the first wireless device. The cordless telephone according to claim 1, wherein the cordless telephone is transmitted to the other slave or the master via wireless means. 3. The cordless telephone according to claim 1, wherein the first and second wireless means perform transmission / reception by transmitting and receiving carrier waves of different frequencies.