JPH0294853A - Incoming p processing method for cordless telephone set - Google Patents

Abstract

PURPOSE:To allow other slave set to use a control channel, to send a call request signal to a master set and to bring the state into the calling state by leading the signal to a call channel for a slave set only specified by an identification code, ringing a call tone and making a control channel receptible. CONSTITUTION:When a master set receives a call signal from a telephone circuit, an incoming request signal including a call channel designation signal is sent through a control channel together with an identification code ID1-1 of a slave set 1-1. The slave set 1-1 identifies its own code, and returns an incoming reply signal with the identification code ID1-1 added thereto to the master set through the control channel. The master set receiving the signal switches the channel into the designated call channel and switches the call channel into the control channel in the receiving a ring reply signal from the slave set 1-1 to prepare the monitor of a call request through the control channel from other slave set. When the operator of other slave set listens to the ring of a call tone of the slave set 1-1 or the master set, the power switch is turned on and the handset is hooked off, then the slave set can form a channel with the telephone circuit.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an incoming call processing method for a cordless telephone.

[Conventional technology]

A cordless telephone consists of a base unit and one or more handsets.When the base unit connected to a telephone line receives an incoming call signal, a specific handset is connected to the telephone line via a wireless line, and the call line is connected to the base unit. When making a call, the slave unit sends a call signal from the base unit to the telephone line via the wireless line. The wireless line has a control channel (1 to 2 channels) and multiple communication channels (several 10 channels), and the former is used for handset and
The latter is used for the connection between base units, and for ringing and talking. Technical standards for cordless telephones are stipulated by radio regulations.

The present invention relates to an incoming call processing method, and a conventional method will be explained with reference to FIG.

FIG. 4 shows the processing procedure for an incoming call request signal to a handset as a sequence diagram between a specific handset 1-1, a general handset 1-2, and a base. In this sequence diagram, signals from the control channel and the communication channel are shown separately.

In a cordless telephone, as long as the handset is turned on, it is in a standby state in which it is ready to receive control channels.

Now, when the base unit receives a calling signal from the telephone line, the base unit uses a control channel to send out an incoming call request signal including a communication channel designation signal together with an identification code IDI. This identification code LD1 is a common code for this cordless telephone.

The specific handset 1-1 sends the incoming call response signal to the handset's identification code [D
1-1 and sends back using the control channel. The base unit receives this signal and switches to the designated communication channel. On the other hand, handset 1-2 receives the incoming call request signal, switches to the designated communication channel, and enters the receiving state.

After transmitting the incoming call response signal, the handset 1-1 switches to the designated communication channel, and upon confirming that the designated communication channel is vacant, transmits a channel switching completion signal. When the base unit receives the channel switching completion signal, it sends out a ring tone signal. Handset 1-1
．． 1-2 starts ringing the ringing tone upon receiving the ringing tone signal.

However, handset 1-2 does not generate any sound as shown by the dotted line,
It is also possible to display a confirmation display for the ringtone.

Here, when the operator of handset 1-2 learns from the ringing sound or the confirmation display that there is an incoming call on the telephone line and goes off-hook, the off-footer signal is identified by the identification code 101-2.
is attached and sent to the base unit.

The base unit closes the telephone line loop and sends the voice circuit ON signal to the speech channel with an identification code IDl-2 attached. Handset 1-2 identifies identification code IDI2, turns on the audio circuit, and establishes a communication path with the base unit. On the other hand, handset 1
-1 stops ringing and enters the standby state when there is an audio circuit ON signal. Here, the audio circuit ON signal is a signal instructing connection of a path between the transmitter/receiver and the wireless transceiver in the handset. The route is cut off until the call is established.

[Problem to be solved by the invention]

When the cordless telephone is not receiving a call, the handset is in a standby state in which it can receive a control channel. This situation will be explained below. Usually, the handset is a handy type,
Since it is designed to operate on batteries, it is conceivable to use it by turning off the power switch, considering that the battery will be consumed even in standby mode. Same cordless phone
When the phone is used at home or in the same store, the ringing tone of a specific handset or base unit can be heard, so even the operator of the handset with the power switch turned off can hear the incoming call.

Therefore, it would be possible to turn on the power switch and go off-hook, but since it is unknown which channel the call processing channel is, it is not possible to switch the call channel.
Response processing is not possible. As a result, as a slave unit, the power switch must be kept on at all times, resulting in the disadvantage that battery consumption cannot be avoided.

An object of the present invention is to provide an incoming call response method that can eliminate the above-mentioned drawbacks and minimize battery power consumption.

[Means to solve the problem]

In the present invention, the base unit connected to the telephone line has at least one
In a cordless telephone that is connected to multiple handsets via a wireless line with one control channel and multiple call channels, when the base unit receives a ring signal from the telephone line, the handset's identification code is transmitted. This is used to guide one handset to a communication channel and perform a ringing process, while also making it possible to receive signals from other handsets using a control channel. Specifically, the base unit switches between the call channel and the control channel in a time-sharing manner during the ringing process using the call channel for a specific handset, monitors the control channel, and monitors the control channel. When receiving a call request signal using a control channel, guide the handset to the same communication channel as the communication channel in which the ringing process is being performed;
The ringing stop process and the incoming call response process are performed at the same time.

[Effect]

The base unit uses a communication channel to perform ringing processing with a certain slave unit. The other handsets are in a standby state for the control channel or are powered off, regardless of the communication channel.

When the operator hears the ring tone on another handset or base unit, turns on the power switch, and sends a call request signal to the base unit using the control channel, the base unit will connect the call channel and the control channel. Since the switching is performed in a time-division manner, the call request signal can be received. Therefore, it is possible to bring other handsets into the talking state in the subsequent steps.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sequence diagram showing the procedure of the present invention, and FIG. 2 is a block diagram showing the outline of the apparatus.

First, an outline of the apparatus used in this method will be explained. The base unit 10 is connected to the telephone line vA1, and the children a20(1) to 20 (
N). In the main unit 10, line relay 2. Dial sending circuit 3. Passing through 2-4 wire conversion circuit 4,
A route leading to the wireless transceiver 5 is formed, and the various routes are controlled by a control unit 6. IDROM7 has main unit 10.
Identification code ID common to handset 20 (11 to 20 (N))
I is registered. The common parts 29 of the slave units 20(1) to 20(N) all have the same configuration, and only the IDROM 28 is different.

However, IDROM2B (11 to 2 B (N)) has an I
It is registered to include the same common identification code ID1 as DROM7.

Handset 23. The transmitter 24 is connected to the wireless transceiver 16 by an audio circuit switch 25 and communicates wirelessly with the antenna 8 of the base unit 10 via the antenna 21 . The control unit 26 controls the wireless transceiver 22.

The identification code unique to the handset is registered in the IDROM 28. The dial/function button section 27 can be operated in the same manner as a normal telephone operation.

The incoming call processing method according to the present invention will be explained below with reference to the sequence diagram shown in FIG. In this example, handset 1-1. Handset 1-
2 is shown as a representative, but none of them are specific. When the base unit receives a paging signal from the telephone line, it sends an incoming call request signal including a call channel designation signal to handset 1-1.
It is transmitted using the control channel together with the identification code IDl-1.

At this time, there is also a method in which the base unit 10 sounds a ring tone.

Handset 1-1 identifies its own code, attaches the incoming call response signal with identification code IDl-1, and sends it back to machine m using the control channel. The base unit receives this signal and switches to the designated communication channel. After transmitting the incoming call response signal, the handset 11 switches to the designated communication channel, and upon confirming that the designated communication channel is vacant, transmits a channel switching completion signal. When the m device receives the channel switching completion signal, it sends out a ring tone signal.

When the handset 1-1 receives this ringing tone signal, it starts sounding the ringing tone.

When the base unit receives the ringing response signal from the handset 1-1, it switches from the previous call channel to the control channel and prepares to monitor call requests from other handsets using the control channel.

Then, after a certain period of time, the communication channel is switched to the designated communication channel again and a ring tone signal is sent out. Receiving this signal, handset 1-1 resends the ringing response signal and continues ringing. Repeated operations like this are performed on the base unit and slave unit 1.
-1 interval. The time-division operation of the base unit is, for example, a control channel period of 1.1 seconds and a communication channel period of 0.3 seconds, and most of the time is monitoring of call requests from other slave units.

If the operator of another handset hears the ring tone of the handset 1-1 or the base unit, the power switch will turn off even if the handset is in standby mode or even if the power switch is turned off. If you turn on and go off-hook, this handset can form a communication path with the telephone line. This procedure will be explained. When handset 1-2 goes off-hook, a call request signal is sent to handset 1-2.
The identification code IDl-2 of 2 is attached and sent to the base unit via the control channel. The base unit sends a call response (2) signal via the control channel with an identification code ID1-2 including the same call channel designation signal as the call channel on which the ringing process is being performed. Handset 1-2 switches to the designated communication channel, but waits for a ringing stop signal sent from the base unit without starting transmission. After switching to the designated call channel, the base unit sends a ringer stop signal. When the handset 1-1 receives this signal, it stops ringing and returns to the standby state. On the other hand, the handset 1-2 turns on the audio circuit using the switch 25 shown in FIG. 2 and sends a channel switching completion signal. When the base unit receives this channel switching completion signal, it closes the DC loop, and the slave m1-2 enters a talking state.

Note that although the handset 1-1 is a general handset without any special configuration, the power must be turned on in order for the base unit to emit a ring tone. Also, while the ringer is ringing, handset 1-1
When the base unit goes off-hook to answer a call, the next time it receives a ringing signal, it sends an off-hook signal and turns on the audio circuit, and when the base unit receives the off-hook signal,
Closes the DC loop of the telephone line to establish a talking state.

Since the present invention relates to an incoming call processing method, the outgoing call processing follows the steps in the sequence diagram shown in Figure 3, although no special explanation will be given. Note that the call response (1) signal here is
This is a signal in a different format from the call response (2) signal in the case of FIG.

〔Effect of the invention〕

As described above, in the present invention, the base unit guides only the slave unit specified by the identification code to the call channel, and at the same time enables reception of the control channel while setting the call tone operation. Therefore, the other slave units can use the control channel to send a call request signal to the base unit and put the slave unit into a talking state according to the procedure described in the embodiment. Normally, other handsets are turned off, and after hearing the ringtone,
Since the power can be turned on and off-hook to make a call, the power consumption of the cordless handset battery can be reduced.

As described above, the base unit may be capable of simultaneously receiving the communication channel and the control channel. One possible way to force simultaneous processing is to prepare two sets of transmitters and receivers in the base unit, but in the present invention, the operation of the base unit is switched between the communication channel and the control channel in a time-sharing manner, thereby solving the problem. are doing.

The present invention can also be applied to a case where an extension call such as an extension hold transfer is answered on behalf of another handset when the transferee is not present and only the ringer sounds. It will be done.

[Brief explanation of drawings]

Fig. 1 is a sequence diagram of an embodiment of the present invention, Fig. 2 is a schematic block diagram of the cordless telephone according to the embodiment, Fig. 3 is a sequence diagram of call processing, and Fig. 4 is a sequence diagram of a conventional example. be. 1--telephone line, 2--line relay 3--dial output path, 4--2-4 line conversion circuit, 5. 22-m-wireless transmitter/receiver, 6. 2G-control unit, 7
, 28--ID ROM, 8.21-antenna, 20-handset, 23--telephone receiver, 24--transmitter, 25--switch, 27-dial/function button section.

Claims (1)

[Claims] 1. A cordless telephone in which a base unit connected to a telephone line is connected to a plurality of slave units via a wireless line having at least one control channel and a plurality of communication channels. When the base unit receives a ringing signal from the line, it uses the identification code of the handset to guide one handset to the communication channel to perform ringing processing, and also uses the control channel from other handsets. An incoming call processing method for a cordless telephone, characterized in that the cordless telephone is capable of receiving received signals. 2. The base unit switches between the call channel and the control channel in a time-sharing manner during the ringing process using the call channel for a specific handset, monitors the control channel, and monitors the control channel from other handsets. When receiving the used call request signal, the handset is guided to the same communication channel as the one in which the ringing process is being performed, and the ringing stop process and the incoming call answering process are performed simultaneously. An incoming call processing method for a cordless telephone according to claim 1.