JP3500832B2 - Cordless parent machine - 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 base unit.

[0002]

2. Description of the Related Art A typical voice path of a conventional cordless master unit capable of connecting a plurality of slave units will be described with reference to FIG.

FIG. 3 is a block diagram of a voice path of a conventional cordless base unit. In FIG. 3, reference numeral 1 is a base unit radio unit,
2 is an analog signal (voice signal) for the cordless cordless handset
A transmitting / receiving amplifier circuit section 3, an amplifier for receiving a cordless cordless handset, and an amplifier for transmitting a cordless cordless handset,
Reference numeral 5 is an interface circuit section for the telephone line.
In the interface circuit section 5, 6 is an amplifier for receiving a telephone line, 7 is an amplifier for transmitting a telephone line,
Reference numeral 8 is an input / output transformer for a telephone line, and 9 is an NCU (network control unit) circuit. Also A
Is a first slave unit, B is a second slave unit, and C is a third slave unit.

The operation of the voice path configured as described above will be described below. Among the above three slave units, when the first slave unit A makes a call, the transmission of the first slave unit A is performed via the master unit wireless unit 1, the amplifier 4, the amplifier 7, the input / output transformer 8 and the NCU circuit 9. Then, it is sent to the telephone line.

The reception of the first cordless handset A is received from the telephone line.
NCU circuit 9, input / output transformer 8, amplifier 6, amplifier 3
And is transmitted to the first slave A via the master wireless unit 1.

[0006]

By the way, when a plurality of cordless handsets are connected to one cordless parent device, it is required that the volume is uniform regardless of which one of the cordless handsets is used.
However, the gain of the child device itself and the efficiency of the speaker of the child device are not constant.

Therefore, in the above configuration, the second
Even if the child device B and the third child device C are used, since the same voice path as that of the first child device A is used, if the child devices to be used are different, a difference in volume occurs between the child devices. There is.

[0008] Therefore, an object of the present invention is to provide a cordless master unit which can obtain a uniform volume even if the slave unit used is different.

[0009]

A cordless master unit according to the present invention comprises a master unit radio unit for communicating with a slave unit, an interface circuit unit connected to a telephone line, and an attenuation amount for each slave unit.
A storage unit for storing, connected intermediate the said base unit radio section and the interface circuit unit, transmitting also a certain handset
Is the volume of the received voice for the slave unit read from the storage unit.
It is provided with an attenuator circuit for controlling the attenuation amount .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is a master unit radio section for communicating with a slave unit, an interface circuit section connected to a telephone line, a master unit radio section and an interface circuit. Since it has an attenuator that is connected in the middle of each unit and attenuates the transmission or reception with a unique attenuation for each handset, the call volume is attenuated by an appropriate amount for each handset. The volume can be made uniform without depending on the machine.

According to a second aspect of the present invention, a base unit radio unit for communicating with a handset unit, an interface circuit unit connected to a telephone line, and an intermediate unit between the base unit radio unit and the interface circuit unit. , And a variable amplifier circuit that amplifies the transmission or reception with a specific amplification amount for each slave unit, so that by amplifying the call volume by an appropriate amplification amount for each slave unit, The volume can be made uniform without depending on.

FIG. 1 shows an embodiment of the present invention.
1 to 2 will be described. In addition, in FIG. 1 and FIG.
The same components as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

(Embodiment 1) FIG. 1 is a block diagram of a voice path of a cordless base unit according to Embodiment 1 of the present invention.

In FIG. 1, 13 is an attenuator circuit as an attenuator that attenuates the received voice to the cordless slave unit by a variable attenuation amount, and 14 is an attenuator circuit as an attenuator circuit that attenuates the speech to the cordless slave device by a variable attenuation amount, Reference numeral 15 is a CPU (central processing unit) that controls the attenuation amounts of the attenuator circuits 13 and 14, 16 is a memory as a storage unit that stores the attenuation amount of each cordless slave unit, and 17 is the attenuator circuits 13 and 14 and the CPU 15
And a memory 16 is a volume switching circuit. The gain of the entire part except the volume switching circuit 17 is constant.

The operation of the cordless master unit configured as described above will be described below. During a call from the first cordless handset A, the transmission of the first cordless handset A passes through the base unit radio section 1 and the amplifier 5, and after being attenuated by the attenuator circuit 14, a multiplier 2 and an input / output transformer 8 are provided. It is sent to the telephone line via the NCU circuit 9.

At this time, the attenuation amount of the transmitted speech of the first slave device A is read from the memory 16 to the CPU 15, and the CPU 15 controls the attenuator circuit 14 so that the read attenuation amount for the first slave device A is obtained. Then, the transmission volume is adjusted to be suitable for the first slave A.

The reception of the first cordless handset A is passed through the NCU circuit 9, the input / output transformer 8 and the amplifier 6 from the telephone line, and after being attenuated by the attenuator circuit 13, the amplifier 4 and the master unit radio section 1 are received. Through the first slave unit A.

At this time, the attenuation amount of the reception of the first slave unit A is read from the memory 16 to the CPU, and the CPU 15 controls the attenuation amount of the attenuator circuit 13 in accordance with the first slave unit A.

In the case of the other second cordless handset B and the third cordless handset C as well, the attenuation amount is set in accordance with each cordless handset, and the transmission / receiving volume of the cordless base unit is adjusted. , The transmission / receiving volume of all the slaves A, B, C can be made uniform.

(Second Embodiment) FIG. 2 is a block diagram of a voice path of a cordless base unit according to a second embodiment of the present invention.

In the present embodiment, unlike the first embodiment, the attenuator circuit does not perform a variable amount of attenuation, but on the contrary, a variable amplification circuit 20 for reception and a variable amplification circuit 21 for transmission are provided. Each slave A in the memory 16
A unique amplification amount is stored for each of B and C. That is, the volume switching circuit 19 of the present embodiment is composed of the variable volume amplification circuits 20, 21, the CPU 15 and the memory 16.

The operation of the cordless master unit configured as described above will be described below.

During a call from the first handset A, the transmission of the first handset A is amplified by the base station radio unit 1, the amplifier 4, and the variable amplification circuit 21, and then the amplifier 7, the input / output transformer 8, and the NCU. It is sent to the telephone line through the circuit 9.

At this time, the amplification amount of the speech of the first slave unit A is read from the memory 45 to the CPU 15, and the CPU 15 sets the amplification amount of the variable amplifier circuit 43 to the amplification amount according to the first slave unit A. In addition, the reception of the first cordless handset A is received from the telephone line through the NCU circuit 9, the input / output transformer 8 and the amplifier 6, and after being amplified by the variable amplifier circuit 20, is transmitted through the multiplier 3 and the master unit radio unit 1 to the first unit. 1 is sent to the slave A.

At this time, the amplification amount of the received voice of the first slave unit A is read from the memory 16 to the CPU 15, and the CPU 15 adjusts the amplification amount of the variable amplifier circuit 42 to the first slave unit A.

Similarly, in the case of the other second cordless handsets B and the third cordless handsets C, the amplification amount peculiar to each cordless handset is set and the transmission / receiving volume of the cordless master unit is adjusted. It is possible to make the transmission and reception volumes of all the handsets uniform.

[0027]

According to the present invention, when a plurality of cordless slave units are connected to one master unit, a uniform volume can be maintained without depending on the slave units.

[Brief description of drawings]

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

FIG. 2 is a block diagram of a voice path of a cordless base unit according to the second embodiment of the present invention.

FIG. 3 is a block diagram of a voice path of a conventional cordless base unit.

[Explanation of symbols]

13 Attenuator circuit 14 Attenuator circuit 15 CPU 16 memory 17 Volume switching circuit

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Claims (2)

(57) [Claims] 1. A master unit radio unit for communicating with a slave unit, an interface circuit unit connected to a telephone line, a storage unit for storing an attenuation amount for each slave unit, the master unit wireless unit and the unit. Connected in the middle of the interface circuit section, the volume of the transmission or reception of a certain handset is described above.
Set the amount of attenuation for the slave unit read from the memory.
A cordless master unit that is equipped with an attenuator circuit for controlling . 2. A base unit radio unit for communicating with a handset unit, an interface circuit unit connected to a telephone line, a storage unit for storing an amplification amount for each handset unit, the base unit radio unit and the unit. Connected in the middle of the interface circuit section, the volume of the transmission or reception of a certain handset is described above.
Set the amplification amount for the slave unit read from the memory.
A cordless base unit having a variable amplification circuit for controlling .