JPS6324725A - Cordless telephone system with selective calling - Google Patents

Abstract

PURPOSE:To receive an incoming call at a remote place without being confused, by enabling individual telephone sets to be called selectively in another service area. CONSTITUTION:In a case a telephone set A is positioned in the service area of the master device l7a of a telephone set B, the caller of the master device 17 of the telephone set A sets a switch 10 at an outgoing side, and performs a dial operation for the master device l7a of the service area where the telephone set A is positioned. An incoming side recognizes the incoming call by an incoming/response detection circuit 3, and responds from an incoming response circuit 4. The master device 17 on the outgoing side selects its own ID containing part 9, and sends its ID to lines L1 and L2 because the switch 10 is connected to the outgoing side. The master device l7a on the incoming side sends a signal to an ID sending control part 6, and sends a received ID. So that the switch 10 is connected to the incoming side, the ID is sent to a slave set call unit 11. and is sent from a transmitter/receiver unit 13 with a call signal. The telephone sets A and B identify the ID, and the telephone A rings a bell, while the telephone set B does not.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a wireless communication system, particularly a cordless telephone, in which a plurality of wireless channels are shared by a plurality of parent devices each connected to a plurality of telephones, and the present invention relates to This invention relates to a system that uses weak radio waves to communicate between each telephone and its opposing parent device.

(Prior art and its problems) This type of conventional system uses a portable telephone,
It consists of a parent device that is connected to the telephone via a wireless line and to the exchange via a wired line. Furthermore, this phone and the parent device connected to it usually have a specific affiliation relationship, and the phone can communicate with other parent devices other than that specific parent device even if they are installed within a short distance where wireless communication is possible. communication was not possible even if there was a telephone other than that particular telephone in a particular combination from that particular parent device, even if there was a telephone within a short distance where wireless communication was possible. .

By removing this restriction and changing the system sequence so that any parent device can be used, the scope of use can be greatly expanded. There is still a problem with billing, so there is room for consideration in giving freedom indiscriminately, but this is permissible within a limited number of establishments, such as within a company. This marks the first time that the flexibility of cordless phones has expanded. In this way, telephone A can leave the parent device CE-A that it manages and make calls to other parent devices CE-N as well.

However, at this point, it was possible to make a call, but not to receive a call. This means, for example, that phone A is normally the parent device CE.
This is because, when a call arrives at the wired number of the parent device CE-A, such as number 10, the telephone A is called.

Similarly, if phone A is connected to CE, which is the parent device of phone B,
-B is within the service area, and when a call arrives at CE-B's telephone number 20, telephone B is called.

Therefore, phone A is connected to CE-B, which is the parent device of phone B.
You cannot receive calls even if you are within the service area. Furthermore, even if this restriction is somehow lifted so that the parent device CE-B of the telephone 81B that calls number 20 calls all telephones within the service area of the parent device CE-B, the external Even if a telephone, for example B, brought in from another country answers, the content is one that should be answered by the owner of telephone A, and this will only confuse the user.

(Object of the Invention) In order to eliminate these problems, the present invention makes it possible to selectively call individual telephones to telephones located in other service areas, thereby making it possible to receive calls at distant locations without confusion. To provide a cordless telephone system capable of selective calling, which expands the range of use of conventional cordless telephones.

(Structure and operation of the invention) The present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a block diagram of a parent device for implementing the present invention, and this parent device is connected to an exchange and attempts to communicate with each other. In Fig. 1, ■ is the telephone line L+, Lz, 2 is a dial circuit, 3 is an incoming call/response detection circuit, 4 is an incoming call response circuit for notifying the receiving side of an incoming call, 5 is a signal decoder, and 6 is a 7 is a reception ID register that temporarily stores the incoming ID signal; 8 is an ID setting unit that sets an ID number; 9 is a self-ID that stores its own ID number.
Storage compartment, 10 is a calling/receiving switch, 11 is a handset calling unit, 12 is a hybrid, 13 is a wireless transmitting/receiving unit, 14 is a telephone A, 15 is a handset for sending and receiving calls, 16 is a telephone B, and 17 is a telephone A The parent device 17a indicates the parent device of telephone B.

General call initial phone number 100 (corresponding handset ID = 10)
A case will be described in which a call is made from phone number 200 (corresponding handset ID = 20 = phone B) from phone number 200 (number = telephone number A) via an exchange.

When telephone A attempts to make a call, the parent device 17 (see FIG. 1) receives this signal and captures the lines L+ and Lx. When the line is available, the operator operates the dial on telephone A to call the number 200, and the master device 17 receives this signal and operates the dial circuit 2 to call the number 200. On the other hand, the parent device 17a on the receiving side also has the same block configuration as shown in Figure 1, and the device (No. 200) receives this signal and detects the incoming call (circuit 3), which closes the DC loop and detects the incoming call. The incoming call response circuit 4 responds to the sending side. Upon receiving this response, the calling side knows that the call has arrived through the incoming call/response detection circuit 3, and based on this information, the ID sending control unit 6 uses its own ID.
D storage section 9 is selected and an attempt is made to send the ID number to line 1, but since switch 10 is not on the calling side, the self ID is not sent. The parent device 17a on the receiving side issues an incoming call response, but since no ID signal is sent, it uses its own ID (
20) and call telephone B. Knowing that telephone aB has its own ID (number 20), a call is made and a conversation begins. The flow of these operations is shown in FIG.

This is the same as the example of receiving a call at a moving destination, but phone A receives a call from phone B's parent device 1.
7a will be described with reference to FIGS. 1 and 4.

If telephone A is known to be within the service area of telephone B's parent device 17a, telephone A's parent device 17a
The caller turns the switch 10 to the calling side and dials the number 200 to the parent device 17a in the service area where telephone A is located. As in the previous case, the receiving side of the parent device 17a numbered 200 detects the incoming call through the incoming call/response detection circuit 3, and responds from the incoming call response circuit 4 to the parent device ff 17 number 100 that the call has arrived. Having received this response, the parent device 17 on the originating side selects its own ID storage section 9, and since the switch 10 has been previously set to the originating side, it sends this ID (No. 10) to the lines L + and L z. Receiving side master device 17a which received this ID recognizes that the ID signal has been sent through signal decoding section 5, and temporarily stores this ID in reception ID register 7.

At the same time, a signal is sent to the ID sending TA control section 6 to send out the received ID (No. 10). Since the switch 10 is on the receiving side, this ID is sent to the handset calling unit 11 and sent from the transmitting/receiving unit 13 together with the calling signal.

Telephones A and B, which received this calling signal, identify the ID and learn that the identification number is number 10 for telephone A, so telephone A rings the bell and telephone B does not ring the bell. The recipient who hears the ringing of the bell establishes a conversation with the caller who is within the communication area of the parent device 17 of telephone A. The flow of these operations is shown in FIG.

The above describes an example in which a call is made from the parent device 17, but
A similar purpose can also be achieved by, for example, dialing a telephone number from the calling telephone and then inputting the ID number of the called telephone from a dial button.

(Effects of the Invention) As described above, the present invention allows you to immediately respond to incoming calls addressed to you at your destination, whereas with conventional cordless phones, you could only make calls using another master device.
It is now possible to receive a call, and this incoming call is sent from the I
Since the bell rings when D is identified, selective call reception is possible, and there is an advantage that the call can be made quickly with the desired called party without the inconvenience of intermediary calls by other people.

[Brief explanation of drawings]

Fig. 1 is a connection layout diagram showing one embodiment of a parent device and a telephone for realizing the present invention, Fig. 2 is a flowchart showing an example of operation during a general call according to the present invention, and Fig. 3 is a movement diagram according to the present invention. Flowchart showing an example of incoming call operation at the destination, No. 4
The figure is a system diagram for explaining the configuration and operation of the present invention. l...Telephone line, 2...Dial circuit, 3...
Incoming call/response detection circuit, 4... Incoming call response circuit, 5...
- Signal decoding unit, 6... TD sending control unit, 7... Reception ID register, 8... ID setting unit, 9.
...Self ID storage unit, 10...Calling/incoming call switching unit, 11...Slave unit calling unit, 12...Hybrid, 13...Wireless transmitting/receiving unit, 14...
・Telephone A, 15... Handset for making and receiving calls, 16
...Telephone B, 17.17a... Parent device. Ha 2 prisoners 4 prisoners

Claims (1)

[Claims] (1) In a cordless telephone system in which a plurality of telephones and a plurality of sets of parent devices connected to the plurality of telephones via a wireless line and connected to an exchange via a wired line share a plurality of wireless channels, one of the parent devices is A call is made by attaching an identification number (ID) unique to the called telephone via a parent device on the calling side, and the parent device on the receiving side receives the ID signal when the call arrives by wire via the exchange. , by attaching the ID signal and calling the called telephone, it is possible to designate and call one telephone among a plurality of telephones within the service area of one parent device. A cordless telephone system that allows selective calling.