JP2955908B2 - Cordless telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base unit for accommodating a plurality of telephone lines (hereinafter referred to as "outside lines") and a radio transmitting / receiving unit, and a plurality of base units connected to the base unit via these radio transmitting / receiving units and the radio line. The present invention relates to a cordless telephone device including a handset.

[0002]

2. Description of the Related Art Conventionally, this kind of cordless telephone device has
When an incoming call arrives on an external line, the base unit transmits a start request signal to the relevant mobile unit via a control channel of the wireless transmission / reception unit to call the relevant mobile unit. When the response signal is returned from the slave unit, the slave unit is switched to a communication channel in the same wireless transmission / reception unit, an incoming call signal is transmitted to the slave unit via the communication channel, and the slave unit is called. Also,
If an incoming call signal has already been transmitted via the communication channel and an incoming call arrives on another external line while the slave unit is being called, the incoming call signal is transmitted to the corresponding slave unit via the same wireless transmission / reception unit. In this case, of course, not only for a new incoming call, but also for a child device that is already calling, the call channel is shifted from the communication channel to the control channel and activated, and then an incoming call signal is transmitted via the communication channel. Like that. In this way, when there are a plurality of incoming calls via the same wireless transmitting / receiving unit, if one of the calling sub-units responds to this, the call shifts to a call via the same wireless transmitting / receiving unit, and the other sub-unit calling is , The wireless communication unit is switched to another wireless transmission / reception unit to shift to the control channel, and then the incoming call signal is retransmitted via the communication channel.

[0003]

In the conventional cordless telephone apparatus described above, if another incoming call arrives during an incoming call, the already called handset is shifted to the control channel. However, there is a disadvantage that the process is interrupted, and processing control of the apparatus becomes complicated. In addition, there are a plurality of factors of incoming calls in the same wireless transmitting / receiving unit, and when one responds, the remaining incoming call is switched to another wireless transmitting / receiving unit for processing. Has occurred.

[0004]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a method for determining whether a terminal is a called handset for receiving an incoming call when another incoming call does not occur. Activating means for transmitting an activation request signal designating the same communication channel from the wireless transmission / reception unit to all the mobile devices in the normal state regardless of whether the mobile device is in the normal state or not. In the case where a new incoming call different from the above incoming call occurs due to congestion after sending out the incoming call signal, the same radio transmitting / receiving unit as the incoming call is sent to the new target called handset. And a congestion termination control means for transmitting a new incoming signal via a communication channel ,
When receiving a response signal for each incoming call after sending a new incoming call signal by the congestion incoming call control means,
Wireless that determines whether there is an available communication channel and determines that it is empty
No transmission / reception unit and communication channel and no new incoming call signal sent
Line transmission / reception unit and predetermined radio transmission / reception unit among communication channels
And first call control means for forming a call between the answering slave and the corresponding incoming call via the call channel .
If all the radio transceivers are in use when the response signal for each incoming call is received after the new incoming call signal is transmitted by the congestion incoming call control means, the priority of the call and the incoming call is determined in advance. After performing a comparison based on the lower-level call or the incoming call and suspending the call, the wireless communication unit and the communication channel are opened, and the wireless communication unit and the answering slave unit communicate with each other via the opened wireless communication unit and the idle communication channel. And a second call control means for forming a call with the incoming call.

[0005]

When an incoming call has occurred and no other incoming call has arrived, an activation request signal designating the same communication channel is transmitted from the wireless transmission / reception unit to all the slave units in the normal state, And, if a new incoming call different from the above-mentioned incoming call occurs after sending out the incoming call signal, a new incoming call signal is sent out via the same radio transmitting / receiving unit and a communication channel, and a new incoming call signal is sent out . when receiving the response signal for each incoming after call signaling, the free
Judge whether there is a wireless transmission / reception section and an idle communication channel, and
Radio transmission / reception unit and communication channel determined to be new
The radio transmitting / receiving unit that transmitted the signal and the call channel
With the answering slave via the fixed wireless transceiver and call channel
A call with the corresponding incoming call is formed. As a result, a call is established between the answering slave and the incoming call via , for example, an idle wireless transmission / reception unit and an idle call channel.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a cordless telephone device according to the present invention. The apparatus main unit 1 and a plurality of sub-terminal 3 ₁ which is composed of a to 3 _y, base unit 1 and each slave with the master unit 1 has a plurality of external line L ₁ ~L _n is accommodated 3 are connected by radio channel with ₁ to 3 _y.

[0007] In FIG 1, base unit 1, external interface 11 ₁ to 11 _n, the cross point 1 is communication channel
2. Wireless transmission / reception units (hereinafter, RF units) 13 _{1 to} 13 _x for performing wireless communication with each slave unit, a CPU 14, a PB dialer 15 for generating a push button dial signal, an IDROM 16 for storing an ID number of a master unit, RAM1
7, a hook switch 18, a key unit 19, a PB receiver 20 for receiving a PB signal coming from an outside line, a line signal detection unit 21 for detecting an outside line signal such as a dial tone, and a voice recording / reproducing unit for recording and reproducing a voice signal. 22, a tone holding circuit 23, a tone ringer 24 for generating various tones, and the like. Here, the external line interface 11 in the base unit 1 includes a loop for detecting an external line loop and reversal, a reversal detection circuit 11a, an incoming call detection circuit 11b, a communication circuit 11c, and a transistor Q for closing the external line loop. It is configured.

The handset 3 includes an RF unit 31, a CPU 32 for performing wireless communication with the base unit 1, an IDROM 33 for storing an ID number of the handset, a key unit 34, and a tone ringer 35 for generating various tones. It is configured.

Next, a schematic operation of the cordless telephone device configured as described above when an incoming call is received will be described with reference to an operation sequence diagram of FIG. Here, as an incoming call to this device,
There is an incoming call to each external line, an incoming call that is generated when one handset calls another handset, and a toaphone incoming call that comes through an interface (not shown). , Toaphone incoming, and extension incoming. Now, if the incoming A state, for example, outside line call, etc. without coming into another is detected, the master unit 1 uses the RF unit 13 ₁ for example, the unit 1
Via 3 ₁ control channel (control ch) to all the idle handset 3 transmits an activation request. When a response signal to the activation request is received from the slave unit 3 via the control channel, all the idle slave units 3 are switched to the same communication channel (talk channel).

[0010] Thereafter, base unit 1, to the traffic channel sub-terminal 3 ₁ example corresponding through which is switched to transmit the incoming A data (incoming call signal). The incoming A data is received by the slave unit 3 _1, as a result, the sub-terminal 3 CPU 32 tone ringer 35 is driven by external ringtone ₁ is released from the speaker 37. When an extension incoming call is made from one handset to another handset during such an outside line incoming call, the base unit 1 detects this as incoming call B, and at this time, the same RF unit 1
Incoming B data generated incoming A data and new the via 3 ₁ traffic channel is transmitted to the slave side. Then the response operation to the incoming A in the sub-terminal 3 ₁ is performed, the incoming A response data is transmitted, the master unit 1 to perform the switching of the traffic channel and return the call channel data to the child machine 3 ₁ At the same time, the RF unit is switched. When receiving over the communication channel of the RF unit 13 ₂ is switched the response signal from the slave unit 3 ₁ to the transmitted traffic channel data, and sends the A call command to the handset 3 _1, in the child machine 3 ₁ external call through the RF unit 13 ₂ is performed. Incidentally, RF unit 13 transmits the speech channel data over the communication channel to the handset 3 _{1
In the case of} switching to ₂ and making an outside line call via this unit 132, it may be possible to return to the control channel and then shift to the outside line call. That, RF in this case, the process returns to RF unit 13 ₂ of the control channel, further handset
By sending A call command to the handset 3 ₁ through the communication channel with connecting to the speech channel of the unit 13 _2, shifts to external calls via the RF unit 13 _2.

[0011] Thus, the sub-terminal 3 when an external call is initiated via the RF unit 13 ₂ in _1, sub-terminal 3 to be again incoming B data through the traffic channel of the base unit 1 RF unit 13 ₁ Send to ₂ . After that, child unit 3
Response operation to an incoming B in ₂ is carried out, the incoming B response data is transmitted, the main unit 1 sends back the B call command to the handset 3 _2, in the results handset 3 _2, RF unit 13 ₁ An extension call is made via the.

[0012] Thereafter, when the intercom call is detected in the main unit 1, and detects it as the incoming C, when the RF unit vacant this time is not, according to the sub-terminal 3 ₂ Toahon calls than internal calls since it is a higher priority, and sends the call disconnection signal to the handset 3 ₂ by interrupt the extension call with display this fact, RF unit 13
Leave ₁ empty. Thereafter, the main unit 1, as well as to perform the switching to the speech channel by sending a start request signal via the control channel to the idle handset, a speech channel is switched to the sub-terminal 3 ₃ to be intercom call The incoming C data is transmitted via the When handset 3 ₃ responds to this call, handset 3 ₃ via RF unit 13 ₁
Intercom call is made.

Next, FIG. 3 is a flowchart showing the operation of the CPU 14 in the base unit 1, and a detailed operation at the time of an incoming call will be described with reference to this flowchart. When an incoming call such as an incoming incoming call from the outside or an incoming incoming call is detected, it is determined in step 300 whether or not any of the plurality of RF units indicates an operating state during the incoming call. In this case, if there is no incoming RF unit, it is determined in step 301 whether or not there is a free RF unit.
If there is an F unit, an incoming call signal is transmitted to the target handset via this unit (step 302). That is, in this case, as described above, all the idle slave units are connected to the same communication channel, and an incoming call signal is transmitted to the target calling slave unit via this communication channel. If there is an incoming RF unit ("Y" in step 300)
), An incoming call signal is transmitted to the target handset via the communication channel of this unit (step 303).
In this case, the first incoming call does not return to the control channel and is not processed, so that interruption of the ring tone is prevented. In this case, there are a plurality of incoming factors in the incoming RF unit (2
One).

If there is no incoming RF unit and there is no vacant RF unit, the priority of the call via the currently used RF unit and the incoming call are compared in step 304, If the priority of the call via the RF unit in the middle is lower, a call disconnection signal is transmitted to the corresponding handset to disconnect the call,
A call disconnection display is performed (step 306). Then, the in-use RF unit is opened to make it an empty unit (step 307), and the process proceeds to step 302 to execute this empty R unit.
An incoming call signal is transmitted to the target handset via the communication channel of the F unit. In this way, when a call is interrupted by a low-priority handset, a message indicating that the call has been cut off is displayed to inform the operator of the reason for the call cutoff, and the volume of the ringtone that follows is reduced. In order to reduce the number, the mute control of the ringtone is performed in the parent device or the child device. If the priority of the incoming call is lower than the priority of the call through the in-use unit and is determined to be “N” in step 304, the call is invalidated (step 305).

In this way, the incoming call signal is transmitted to the slave through the RF unit, and as a result, the incoming response operation is performed in the slave (step 308), and this response signal is detected by the CPU 14. In this case, the CPU 14
Determines in step 310 whether there is only one incoming factor among the RF units in the incoming operation, and if there is only one incoming factor, shifts to a call using this same RF unit ( At the same time as step 311), if there is any incoming call to the other handset, the other handset is connected to the control channel to release the wireless connection (step 312). If a plurality of incoming factors are received in the same RF unit, that is, an incoming call to an outside line and an incoming call to an extension are performed via the same RF unit, the determination in step 310 is “N”. Step 31 determines whether there is a unit
Judge at 4. If there is a vacant RF unit, the call is shifted to a call using this RF unit (step 315). In this way, if there are a plurality of incoming factors in the incoming call unit, the call in response to the incoming call is made via another RF unit, and the unanswered incoming call in the incoming RF unit is left as it is. The interruption of the ring tone at the machine can be prevented.

Next, when there are a plurality of incoming factors in the incoming RF unit and there are no other free RF units, the priority between the call via the active RF unit and the incoming call to be answered is determined. The determination is made in step 316. In this case, if the priority of the call via the in-use RF unit is lower, then the priority of this call and another incoming cause in the incoming RF unit is determined in step 317. If another incoming factor in the incoming RF unit has a lower priority ("N" in step 317), a call is made to be answered using this incoming RF unit (step 311). The unanswered incoming call, which is another incoming call factor with a lower rank, is canceled. That is, in step 312, the other handset, which is the called handset due to another incoming cause, is connected to the control channel and is released.

On the other hand, if the other incoming factors in the incoming RF unit are higher than the priority of the call through the busy RF unit ("Y" in step 317), the answering call is transmitted through the busy RF unit. RF in use to make
A call disconnection signal is transmitted to the slave unit of the unit to terminate the call, and at this time, a call disconnection display is performed (step 318). Then, the in-use RF unit is released to make it an empty unit (step 319), and the flow shifts to step 315 to shift to a response call through the call channel of this empty RF unit.

As a result of comparing the priorities of the call through the RF unit in use and the incoming call to be answered, the call through the RF unit in use has a higher priority. ”, The priority order of the incoming call to be answered and another incoming call is determined in step 320 in the incoming RF unit, and the incoming call to be answered is subject to a higher priority. If the answer is low, it is determined that the response is impossible (step 321). If the incoming call to be answered is of higher priority, the incoming call
A response call is made using the F unit (step 31).
1) At this time, an unanswered incoming call which is another incoming call factor having a lower priority is released. That is, in step 312, the other handset, which is the called handset due to another incoming cause, is connected to the control channel and is released.

[0019]

As described above, according to the present invention, when an incoming call occurs and no other incoming call arrives, the same radio channel is transmitted from the radio transmitting / receiving unit to all the slave units in the normal state. And transmits an incoming call signal to the slave unit via the communication channel,
While sending a new incoming call signal If this after sending the incoming call signal to the receiving different new incoming occurs through the same radio transceiver and call channel, after the new call signaling
If a response signal for each incoming call is received
Judgment of the transmission / reception section and available communication channel
The determined radio transmitting / receiving unit and communication channel and a new incoming call signal
Out of the radio transmitting / receiving unit and the communication channel that transmitted
Compatible with answering handsets via wireless transceiver and communication channel
Since the call with the incoming call is formed , if the incoming call arrives in duplicate, it is possible to prevent interruption of the ring tone sent from the slave unit and to simplify the processing control.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a cordless telephone device according to the present invention.

FIG. 2 is a sequence diagram showing an operation of the device.

FIG. 3 is a flowchart showing the operation of the above device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base unit 3 Slave unit 11 Outside line interface 11b Incoming call detection circuit 11c Communication circuit 12 Cross point 13, 31 Wireless transmission / reception unit (RF unit) 14, 32 CPU 15 PB dialer 16, 33 IDROM 19, 34 Key unit 24, 35 Tone ringer Q Transistor

Continuation of front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 7/26 H04M 1/00

Claims (2)

(57) [Claims] 1. A base unit accommodating one or more telephone lines and having a plurality of wireless transmission / reception units, each connected to the wireless transmission / reception units by a wireless line based on a multi-channel system including a control channel and a plurality of communication channels. In a cordless telephone device composed of a plurality of handset units, if an incoming call occurs in a state where no other incoming call has occurred, it is in the normal state regardless of whether or not this handset is the called target handset unit. Activating means for transmitting an activation request signal designating the same communication channel from the wireless transmission / reception unit to all the mobile units, and transmitting an incoming call signal to the called target mobile unit via the communication channel In addition, if a new incoming call different from the incoming call occurs due to congestion after the transmission of the incoming call signal, the same wireless transmission / reception as the incoming call is performed to the called handset of the new incoming call. Parts and congestion reception control means for sending a new incoming call signal through the speech channel, the after new incoming call signal sending by the width輳reception control means
When a response signal for each incoming call is received, an idle wireless transceiver
And whether there is a free communication channel
Transmits the new incoming call signal with a radio transmitting / receiving unit and a communication channel.
Outgoing radio transmitting / receiving unit and communication channel
Answers incoming calls with the answering handset via the transceiver / communication channel
A first call control means for forming a call with the cordless telephone device. 2. The wireless communication system according to claim 1, wherein when a response signal for each incoming call is received after the congestion incoming call control unit sends out a new incoming call signal , all radio signals are received.
If the transceiver is in use, the call and
Call based on call priority and
If there is an incoming call, interrupt it, and then
A cordless telephone comprising: a second communication control means for establishing a call between the answering handset and the incoming call via a wireless transmission / reception unit and an idle communication channel, while releasing the communication unit and the communication channel. apparatus.