JPH03190494A - Cordless telephone system - Google Patents

Abstract

PURPOSE:To call a caller telephone set after the end of talking by allowing a master set to store a number of the caller telephone set and an ID code of a called slave set when the slave set is busy and sending the code to the slave set. CONSTITUTION:Suppose that a slave set 21 is called by, e.g. a telephone set 5 when the slave set 21 is busy, a busy pseudo tone signal is sent to the caller telephone set 5 and when the telephone number is inputted by the operator of the telephone set 5 succeedingly, the telephone number is sent to the master set 1 via a wired line 3 and the master set 1 stores the telephone number (extension number) and the ID code tentatively. When the talking is terminated, the slave set 21 sends a call termination signal to the master set 1, a registration telephone number is displayed on a display section 7 in this case and the call of the telephone set 5 of the telephone number is implemented automatically. Thus, the slave set calls back the caller telephone set after the end of talking.

Description

[Detailed Description of the Invention] Field of Application in the CM Industry] This invention is used within a predetermined area such as a golf course, a construction site, or a factory, and is composed of a plurality of slave units and one or more base units. The present invention relates to a cordless telephone system, and more particularly, to a cordless telephone system in which when a handset during a call is called, the handset calls the calling telephone after the call ends.

[Conventional example] In recent years, cordless telephones have been proposed by various manufacturers as new home appliance products. A cordless telephone consists of a connecting device (i-device) and a handset (slave device) that are connected to a telephone line, and signals such as calls, ID codes, voice communications, etc. are transmitted and received by radio waves between them. Therefore, the connection device is equipped with a radio wave transmitting and receiving function, and the handset also has a built-in radio wave transmitter and receiver. In other words, the other party's voice is converted from an electrical signal to a radio wave signal by the connecting device and sent to the handset. Conversely, a voice signal transmitted by radio waves from the handset is converted from a radio wave signal to an electric signal by the connecting device a, and is transmitted to the other party via the same line.

By the way, the above-mentioned cordless phones come in two types: low power type for home use and low power type for commercial use, but both have a one-to-one correspondence between the base unit and the handset, and it is not possible to use multiple handsets. Can not do it.

Therefore, the base unit may be one, and the slave units may be N (any number), or the base unit may be M (any number), and the slave units may be N.
Cordless telephone systems have been proposed.

[Problems to be Solved by the Invention] However, in the above-mentioned cordless telephone system, when a call is made to a handset that is currently on a call, only a signal indicating that the call is in progress is sent to the caller. , there was no connection with the handset, meaning there was no way to rescue the handset from calling during a call. Therefore, it is necessary for the calling party to perform a calling operation (dial operation) over a period of time, or to perform a calling operation after a predetermined period of time, that is, assuming that the call will end.

This invention was made in view of the above-mentioned problem, and its purpose is to enable the handset to call the calling phone after the call is completed when a call is made to the handset during a call. Our goal is to provide a cordless telephone system.

[Means for Solving the Problems] In order to achieve the above object, the cordless telephone system of the present invention includes a plurality of handsets used within a predetermined area, and a cordless telephone system arranged within the area and connected to the handsets. Call between I
At least one base unit that sends and receives signals such as N-code and voice communication, and an exchange that connects the base unit and the telephone with the same wire are provided, and the base unit is connected to the plurality of slave units. When the called handset is busy, the code of the called handset and the number of the calling telephone are stored, and this number is transmitted to the called handset;
The gist is that the called handset registers the number and calls the telephone with the registered number when the call ends.

[Function] With the above configuration, if there is a call to the handset that is currently talking, the handset that is currently talking and the base unit will not be connected using another communication channel, so the call will not be received from the base unit. A pseudo busy tone signal is output to the calling telephone. At this time, when the telephone number (extension number) is entered on the calling phone, the base unit stores the extension number and the ID code of the called handset, and also calls the caller by ID and frequency management. The extension number is sent to the handset that is currently on the call. Then, the handset during the call momentarily receives the data for that extension number and registers it internally. Thereafter, the call is terminated on the handset, the registered extension number is displayed on the display, and a call is made to that number.

In this way, when the called handset is busy, the extension number of the caller is registered on the handset, and the extension number is called after the call ends, so the calling handset has no trouble resetting the phone. It is not necessary to make the call.

[Example] Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

In FIGS. 1 and 2, a base unit (connection device) 1 is provided in a predetermined area (for example, the grounds of a golf course, etc.), and within that area, cordless telephone system handsets 21, 2zt, ...There are multiple s2Ns. The base unit 1 is connected to an exchange 4 via a wired line (extension) 3, and telephones (for example, extension telephones) 5 and 6 are connected to the exchange 4.

In addition, the base unit 1 has a wireless control function that calls the slave units 21, 2□, ..., 2N, and transmits and receives signals such as ID codes and voice communication over a control channel and a call channel, and is connected to the exchange 4 on the same line. When the called handset is busy, it stores the ID code of the called handset and the number from the caller, and sends the memorized number to the called handset. , ID, and frequency management functions, and among the handsets 21, 2□, . . .

Furthermore, as shown in FIG. 2, the handset 2□.

22, . ing.

As a further supplement, the above cordless telephone system:
A duplex system is adopted, and voice communication including various data transmissions within the voice band is performed.

Next, we will explain the operation of the cordless telephone system with the above configuration in a second manner.
The explanation will be given with reference to a partial view of the main body of the slave device in the figure.

First, it is assumed that when the handset 21 of the ID code (IDOI) is busy, a call is made to the handset 2□ using the telephone 1 (extension number 360) 5, for example. Then, when the telephone 5 calls, the base unit 1 and its telephone 5 are connected in the exchange 4, and the base unit 1 transmits the ID code (100L) of the slave unit 21 via the control channel, There is no response to the ID code from machine 2□.

Therefore, the base unit 1 outputs a pseudo call-in-progress signal indicating that connection with the slave unit 21 is impossible, and a call-in-progress pseudo sound signal is sent to the calling telephone 5. Further, ID and frequency management, that is, a call call on the same radio line, is performed between each unit in the base unit 1, and the frequency (channel used) of the handset 2□ is caught.

Next, the operator of telephone 5 dials the telephone number (extension number 3).
60) is input, this phone number is sent to the base unit 1 via the wired line 3, so the base unit 1 inputs the phone number (extension number 360) and ID code (IDOL).
I will remember the time. Furthermore, base unit 1 transmits the phone number stored in handset 21 using the frequency of the call phone on the wireless line, and handset 2□ momentarily receives the phone number and registers it at - time. It turns out. In addition,
After inputting the number, the on-hook operation of the telephone 5 causes the exchange 4 to disconnect the telephone 5 from the base unit 1.

Subsequently, when the call ends, the handset 21 sends a call termination signal to the base unit 1. At this time, the registered phone number is displayed on the display unit 7 (as shown in the figure), and the number is The telephone 5 is automatically called. That is, signals are exchanged between handset 2□ and base unit 1 for normal wireless connection, automatic dialing of telephone 5 is performed on base unit 1, and a calling signal is sent via exchange 4. extension number 36
Since the message is sent to telephone 5 of No. 0, that telephone 5 will be called.

In this way, when the called handset 2□ is busy,
When the call is terminated, the handset 21
Since the call is made, there is no need for the caller's telephone 5 to perform the call operation again and again.

In addition, in the above embodiment, a case is explained in which a call is made from an extension telephone to the handset 21 during a call, but the same applies even if the call is from another handset or an outside line. It is.

[Effects of the Invention] As explained above, according to the cordless telephone system of the present invention, when a handset is called and the handset is busy, the base unit receives the number of the calling phone and the called party. Memorize the ID code of the handset and IO
1 Send the number memorized by frequency management to the calling handset, and the handset registers the number of the calling telephone, and
Since the phone with the registered number is called after the call ends, the calling optical phone only needs to input the phone number (extension number), and there is no need to call the handset that is currently on the phone again. Moreover, there is an effect that connection with the called slave device can be established in a short time.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram of a cordless telephone system showing one embodiment of the present invention, and FIG. 2 is a schematic partial diagram of a handset used in the cordless telephone system. In the figure, 1 is the base unit, 2ztLt..., 2N is the slave unit (handset), 3 is the wired same line (extension line), and 4 is the exchange. 5.6 is a telephone, and 7 is a display unit (of a slave unit). Patent Determination Fujitsu General Ltd.

Claims (2)

[Claims] (1) A plurality of handsets used within a predetermined area, and at least one base unit located within the area that performs calling, exchanging signals such as ID codes and voice communications with the handsets; , an exchange that connects the base unit and the telephone by a wired same line, and the base unit is configured to control the number of the called handsets when the called handset among the plurality of handsets is busy. The code and the number of the calling telephone are stored, and the number is sent to the called handset, and the called handset registers the number and calls the telephone with the registered number at the end of the call. A cordless telephone system characterized by: (2) The cordless telephone system according to claim 1, wherein the handset is equipped with a display means, and the display means displays the registration number upon completion of the call.