JP2918357B2 - External transfer method for cordless telephones - 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 comprising a master unit connected to a telephone line and a plurality of slave units each connected by a wireless line. Relates to an external line transfer method between the slave units.

[0002]

2. Description of the Related Art In a conventional cordless telephone including one master unit and a plurality of (for example, two) slave units, a specific hold operation is performed during an external call by any of the slave units, and thereafter, a certain hold operation is performed. There is also a type having an external line transfer system that can take a reserved external line also in the slave unit.

In this type of cordless telephone, two wireless units are mounted on a base unit.

FIGS. 3 and 4 show the electrical configuration of the master unit and the slave unit of the above-mentioned conventional cordless telephone.

[0005] That is, a master unit A11 shown in FIG. 3 has a first wireless unit 51 including a first receiving unit 511 and a first transmitting unit 512, and a second wireless unit 521 including a second transmitting unit 522. Two wireless units of two wireless units 52 are mounted.

In the drawing, reference numeral 53 denotes a control unit for controlling the operation of the whole base unit A11, reference numeral 54 denotes an operation unit for inputting dial numbers and the like and setting of various modes, and reference numeral 55 denotes an earpiece incorporated in a handset. Reference numeral 56 denotes a microphone incorporated in the handset, and reference numeral 57 denotes the first wireless unit 51.
A first antenna connected to the second wireless unit 52
Are connected to the second antenna.

[0007] The slave unit B11 shown in FIG.
1, a transmission unit 62, a control unit 63 for controlling the operation of the whole handset B11, an operation unit 64 for inputting dial numbers and the like and setting various modes, an earpiece 65 incorporated in a handset, a microphone 66 incorporated in a handset , An antenna 67 connected to the receiving unit 61 and the transmitting unit 62. In addition, since the child device B12 has the same configuration, only the reference numeral is given here.

Next, an example of the operation of the cordless telephone having the above configuration will be described.

The first wireless unit 51 of the master unit A11 and the slave unit B11
Are in a connected state and an outside line call is in progress.

At this time, when a specific hold operation is performed on the slave unit B11, the control unit 63 transmits the master unit A via the transmission unit 62.
At 11, a signal indicating that a specific hold operation has been performed is transmitted.

The base unit A11 receives this signal via the antenna 57 at the first receiving section 511 of the first radio section 51 and sends it to the control section 53.

The control unit 53 places the master unit A11 itself in an outside line hold state based on the signal indicating the specific hold operation, then drives the second wireless unit 52, and the second wireless unit 52 causes the slave unit B12 to operate. And the second wireless unit 52 and the slave unit B12
Are connected. Further, control unit 53 transmits a signal indicating that it is in the outside line hold state from second wireless unit 52 to slave unit B12. As a result, a display indicating that the external line is on hold is displayed on the slave unit B12.

That is, at this time, two communication channels are used, a communication channel for connecting the first wireless unit 51 and the slave B11 and a communication channel for connecting the second wireless unit 52 and the slave B12.

In this state, for example, when the slave unit B12 takes an outside line, the slave unit B12 sends the second wireless unit 5 of the master unit A11.
2, a signal to the effect of taking an outside line is transmitted. Control unit 5
3 is a first radio unit 5 based on the signal to take the outside line.
1 transmits a signal indicating the end of the outside line holding state to the slave unit B11, and returns the slave unit B11 to the standby state.
Further, based on the signal indicating that the outside line is taken, control unit 53 cancels the outside line holding state of base unit A11 itself, and connects the outside line to second wireless unit 52. As a result, the slave unit B12 and the outside line enter a talking state.

[0015]

As described above, in a conventional cordless telephone provided with a plurality of slave units, when the above-described external line transfer method is employed, the base unit has a wireless communication unit corresponding to the number of slave units. Parts had to be mounted. Therefore, there has been a problem that the parent machine itself becomes large and the cost increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an external line transfer of a cordless telephone which enables transfer between a plurality of slave units by mounting only one wireless unit in the master unit. It is to provide a method.

[0017]

In order to solve the above-mentioned problems, a cordless telephone according to the present invention employs an external line transfer system in which a base unit connected to a telephone line and each base unit are connected by a wireless line. In a cordless telephone including a plurality of handset units, a single wireless unit is mounted on the base unit so that the base unit and each of the handset units are connected by one call channel. Then, when one handset performing a call with an outside line performs a specific hold operation, the master unit puts the outside line on hold, and then sequentially assigns this one call channel to each handset in a time-division manner. When another call is made to release the hold in this state, the hold state is released and the other handset is disconnected from the other handset when the time assigned to the call channel is reached. In which speech path and is to be formed.

[0018]

The cordless telephone according to the present invention is configured such that one wireless unit is mounted on the base unit so that the base unit and each of the slave units are connected by one call channel.

Then, when one of the slave units during a call with the outside line performs a specific holding operation, the master unit puts the outside line on hold,
This one communication channel is sequentially and repeatedly assigned to each slave unit by time division. In other words, each slave unit is shown to be in an outside line hold state in a time sharing manner.

In this state, if another slave unit performs a hold release operation, when the call channel reaches the time allotted to this slave unit, the master unit releases the hold state of the external line, and also releases the external line. And another slave unit,
Make a call.

[0021]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 are block diagrams showing the electrical configuration of the parent device and the child device of the cordless telephone according to the present invention. However, the present embodiment exemplifies a case in which the number of slave units is two.

In FIG. 1, a master unit A1 includes a single radio unit 8 including a reception unit 1 and a transmission unit 2, a control unit 3 for controlling the operation of the whole master unit A1, input of dial numbers and the like, and various modes. An operation unit 4 for setting, an earpiece 5 incorporated in the handset, a microphone 6 incorporated in the handset,
It comprises an antenna 7 connected to the receiving unit 1 and the transmitting unit 2. Although not shown, the master unit A1 has functions inherent to the telephone, such as a speech network circuit, a hook switch, and an incoming call detection circuit.

In FIG. 2, slave unit B1 includes a receiving unit 11,
The transmission unit 12 and the control unit 1 that controls the operation of the entire slave unit B1
3. Operation unit 14 for inputting dial numbers and setting various modes, earpiece 1 incorporated in handset
5. Microphone 16 incorporated in handset, receiver 1
1 and an antenna 17 connected to the transmission unit 12. In addition, since the child device B2 has the same configuration, only the reference numeral is given here.

Next, an external line transfer function in the cordless telephone having the above configuration will be described. However, this external line transfer function is mainly realized by the control unit 3 of the master unit A1 and the control units 13 and 23 of the slave units B1 and B2, and each has a configuration including software operating on a microcomputer. I have.

It is assumed that the radio unit 8 of the master unit A1 and the slave unit B1 are in a connected state, and an outside line call is in progress. At this time, the slave unit B
When the specific hold operation of 1 is performed, a signal indicating that the specific hold operation has been performed is transmitted from the control unit 13 to the master unit A1 via the transmission unit 12.

The master unit A 1 receives this signal at the receiving unit 1 of the radio unit 8 via the antenna 7 and sends it to the control unit 3.

Based on the signal indicating the specific hold operation, the control unit 3 sets the master unit A1 itself in the outside line hold state, and sets the slave unit B
1 is temporarily terminated. Therefore, the slave unit B1
Are on standby on the control channel.

Next, the master unit A1 calls the slave unit B1 and the slave unit B2 alternately on the control channel again. Specifically, a signal for calling the slave B1 is transmitted, and if there is no response from the slave B1, a signal for calling the slave B2 is transmitted next. If there is no response from the slave unit B2, the slave unit B
1 is transmitted. Such an operation is repeatedly performed.

Then, during the repetition of the above operation, for example, when there is a response from the slave unit B1, the master unit A1 transmits a signal for calling the slave unit B2 having no response again. When slave unit B2 responds to the call signal, master unit A1 tunes the transmission / reception frequency to the specified communication channel included in the transmitted signal. Similarly, the slave units B1 and B2 enter the reception state by adjusting the reception frequency to the communication channel specified in the call signal.

Thereafter, master unit A1 transmits a signal for instructing slave unit B1 to display an outside line hold state and to send a hold tone to slave unit B1 using this call channel. Upon receiving this, the slave unit B1 transmits a response signal to the master unit A1 for a predetermined period of time, stops, and displays an outside line hold state and sends a hold sound.

Next, the base unit A1 transmits a signal for instructing the display of the outside line hold state and transmission of the hold sound to the handset unit B2 using the same call channel. Receiving this, the slave unit B2 transmits a response signal to the master unit A1 for a predetermined time and stops, and displays an outside line hold state and sends a hold sound.

The master unit A1 and the slave units B1 and B2 repeat this operation thereafter. In other words, the child device B1 and the child device B2 alternately use the same transmission / reception frequency in a time-sharing manner to maintain communication with the parent device A1 and to transmit that the external line is in a hold state.

If, for example, an operation of taking an outside line is performed by the slave unit B2 while the fact that the external line is in the hold state is transmitted by repeating the above operation, when the slave unit B2 has reached the time to respond, the slave unit B2 Transmits a signal to the effect that an outside line is taken to master unit A1.

Upon receiving this signal, master unit A1 first transmits a signal indicating the end of the outside line holding state to slave unit B1. Receiving the end signal, handset B1 shifts from the previous call channel to a standby state on the control channel. Further, master unit A1 next transmits a signal to the slave unit B2 to constantly use the current call channel. Receiving this signal, handset B2 constantly outputs radio waves at the transmission frequency of the communication channel and constantly receives radio waves at the reception frequency of the communication channel.

Thereafter, master unit A1 releases the outside line holding state and connects the outside line to radio unit 8. Thereby, the slave unit B
No. 2 is in a state where external line communication is possible.

That is, an external line transfer from the slave unit B1 to the slave unit B2 has been performed.

[0038]

According to the outside line transfer system of the cordless telephone according to the present invention, when one of the slave units performing a call with an outside line performs a specific holding operation, the master unit puts the outside line on hold and then executes the one call. Channels are sequentially and repeatedly assigned to each slave unit in a time-division manner. In this state, if another slave unit performs a hold release operation, the hold state is set when the time assigned to the call channel is reached. Since it is released and a communication path between another slave unit and an outside line is formed, even when the master unit has only one wireless unit,
External line transfer from one slave to another slave is enabled. In addition, since the master unit only needs to have one wireless unit, it is possible to reduce the size and cost of the master unit.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a base unit of a cordless telephone according to the present invention.

FIG. 2 is a block diagram showing an electrical configuration of a slave unit of the cordless telephone according to the present invention.

FIG. 3 is a block diagram showing an electrical configuration of a base unit of a conventional cordless telephone.

FIG. 4 is a block diagram showing an electrical configuration of a slave unit of a conventional cordless telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving part 2 Transmitting part 3 Control part 8 Radio part A1 Master B1, B2 Slave

Claims (1)

(57) [Claims] 1. A cordless telephone comprising a master unit connected to a telephone line and a plurality of slave units each connected by a wireless line.
By mounting one wireless unit, the master unit and each of the slave units are formed so as to be connected by one call channel, respectively, and one slave unit during a call with an outside line performs a specific holding operation. After the parent unit puts the outside line on hold, the one communication channel is sequentially and repeatedly assigned to each of the slave units in a time-division manner, and in this state, another slave unit performs a hold release operation. And when the time assigned to the call channel is assigned to itself, the hold state is released to form a call path between another slave unit and the outside line. Transfer method.