JPS62194768A - Telephone exchange system - Google Patents

Abstract

PURPOSE:To attain the talking wherever a mobile telephone set is moved when a terminal equipment for location registration is available by connecting a line controller to a subscriber line just after an exchange and managing the location information of the mobile telephone set centralizingly. CONSTITUTION:A line controller 4 is installed to the same location as an exchange 2 and a wire transmission line 5 to a terminal equipment 6 is drawn together with a subscriber line 3 from the exchange 2. A couple of the wire transmission lines 5 are installed to each terminal equipment 6. A subscriber number is decided to the subscriber line 3, which corresponds one by one to each terminal equipment 6. The line controller is provided with a memory device applying file management corresponding to each mobile telephone set 7 by using the subscriber number of the drawn subscriber line 3, the identification code of the mobile telephone set 7 and the identification code of the terminal equipment 6. The terminal equipment 6 makes the transmission/reception of the identification code of the mobile telephone set 7 with the mobile telephone set 7 in case of connecting the outgoing/incoming call and the transmission/ reception between a circuit connected to the line 9 and the line controller 4 via the line 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention is applied to a telephone switching system of a public telephone network or a private branch exchange telephone network. The present invention allows a telephone user to carry a telephone with him or her, connect the telephone to the telephone network at the destination, and
This relates to a method of using telephones with the same subscriber number.

[Conventional technology]

In a public telephone network or a private branch exchange telephone network, a subscriber number is assigned to a subscriber line accommodated in an exchange connected to the telephone network, and switching connections and billing are performed using this subscriber number. Generally, subscriber lines and subscriber numbers have a fixed correspondence, and changing this correspondence requires changing the wiring inside the switching device.

Therefore, when a telephone user temporarily leaves his or her desk to work or otherwise moves, he or she must use a different subscriber line and telephone set and a corresponding different subscriber number. .

[Problem that the invention seeks to solve]

There is a method for forwarding incoming calls to make this convenient.
Although it is convenient for incoming calls, it places a burden on the destination when outgoing calls involve charges.

There is also a technique in which a separate switch circuit is provided in the subscriber line connection section of the exchange to change the connection of the subscriber line, but this switch circuit is not controlled every time a call is made or received. It is conceivable to control this switch circuit each time a call is sent or received, but this would involve major changes to the existing switching equipment and would not be economically feasible. In addition, the service of carrying a telephone and using the same subscriber number at the destination does not require changing equipment for all subscribers, and is limited to a limited number of subscribers. If this is done within the scope of the above, it will be sufficient to meet that request.

However, in mobile radio communication systems, a system is implemented in which people move around and use the telephone with the same subscriber number, but since it uses radio waves, there is a limit to line capacity, and it is used inside buildings where it is difficult for radio waves to reach. Therefore, it is necessary to equip the mobile telephone with a power supply device and a wireless transmitting/receiving device, which increases the size of the device.

The present invention is an improvement on this, and is characterized by providing a system in which a user can move with a telephone, connect the telephone to the telephone network at the destination, and use it with the same subscriber number. In particular, the aim is to provide a system that is economical in equipment, small in size in mobile equipment, and compatible with existing telephone networks without requiring any changes.

[Means for solving problems]

The present invention provides a telephone switching system in which a subscriber number is assigned to a subscriber line accommodated in an exchange connected to a switching network, and a switching connection is made using this subscriber number. Regarding the subscriber number, the subscriber line is connected to a line control device, and a large number of terminal devices are connected to this line control device via a large number of wired transmission lines, and a plurality of mobile terminals, each of which is assigned the above-mentioned specific subscriber number, is connected to a line control device. The mobile telephone is equipped with a telephone set, and the mobile telephone has a structure that allows it to be detachably connected to any of the terminal devices, and the specific telephone transmits an identification code corresponding to the subscriber number to the line control device via the terminal device. The transmission is automatically transmitted, and the line control device is characterized by comprising means for automatically connecting the wired transmission line to the corresponding subscriber line in accordance with the identification code received from the wired transmission line. do.

At the same time as the switching connection, billing can be performed using the subscriber number.

[Effect]

The mobile telephone automatically transmits an identification code corresponding to its subscriber number onto the line. This can be sent when a new connection is made to the line, or when there is a request from the line to send an identification code. The line control device receives the identification code sent from the mobile telephone, stores the wired transmission path to which the telephone with that subscriber number is connected, and assigns this wired transmission path to the exchange for that subscriber number. Connect to the subscriber line.

Therefore, a user of a specific subscriber number can carry a telephone while moving, connect it to a terminal device at the destination, and use the telephone with the same subscriber number. The incoming call arrives at the mobile phone. Also, no matter where you use the service, you will be billed for that subscriber number.

Since only specific subscriber numbers are connected to the line controller switching equipment, there is no need to make major changes to the existing switching network equipment. Furthermore, since the mobile telephone is connected to the exchange via a wired transmission line, it can be an extremely small telephone equipped with a circuit for transmitting and receiving an identification code.

Telephones can use the power supplied from the exchange, so they do not require a separate power supply except for special purposes.

Also, unlike when using radio waves, there is no need for a device that transmits a signal with large power or a device that receives a signal with a small electric field.

〔Example〕

FIG. 1 is a system configuration diagram for explaining the present invention in detail. 1 is a public telecommunications network, 2 is a local exchange (LS) that accommodates general users or a private branch exchange (PABX) that accommodates only users within a company, 3 is a subscriber line from the exchange to the user, and 4 is a line control device, 5
is a wired transmission line of a line control device that is fixedly connected to a terminal device by wire, 6 is a terminal device, 7 is a mobile telephone, 8 is a general telephone housed in an exchange, and 9 is a terminal device 6 and a mobile telephone 7 It is a wired transmission line that connects the

The line control device 4 is usually a local exchange or a private branch exchange 2.
It will be installed in the same station building where . A wired transmission line 5 to a terminal device 6 is connected to the line control device 4 along with a subscriber line 3 from the exchange 2.

A pair of this line transfer path 5 is installed for each terminal device 6. Further, a subscriber number is determined for the subscriber line 3, and this corresponds to the mobile telephone 7 on a one-to-one basis. If there are a plurality of subscriber lines 3 (0), there are also n mobile telephones 7,
The number of terminal devices 5 is m.

The line control device 4 files the subscriber number of the subscriber line 3, the identification code (PID) of the mobile phone 7, and the identification code of the terminal device 6 connected to the mobile phone 7 for each mobile phone 7. Equipped with a storage device for management. Also, based on that data, subscriber line 3 on the exchange side
and the wired transmission line 5 on the terminal device 6 side, an interface circuit for processing incoming and outgoing calls to the subscriber line 3, and an identification code between each terminal device 6. It includes an interface circuit for transmitting and receiving signals as well as transmitting and receiving signals for incoming and outgoing calls.

The wired transmission line 5 utilizes a local transmission line or in-house wiring that connects the circuit control device 4 and the terminal device 6. Direct current, voice, digital signals or dial (PB) signals are transmitted to this.

The terminal device 6 is attached to strategic points on a desk or wall in an office, a rest room, or a wall in a hallway. When making and receiving calls, the terminal device 6 includes a circuit for transmitting and receiving an identification code of the mobile phone 7 to and from the mobile phone 7 and a circuit for connecting to the wired transmission path 9 through the wired transmission path 5. It has a circuit for transmitting and receiving the identification code of the mobile telephone 7 and transmitting and receiving signals to and from the line control device 4.

The mobile telephone a7 moves with a user who changes locations or leaves his/her seat, and is connected to a terminal device at the destination using a connector. Its shape is that of a small, portable telephone, and its operating parts include a hook switch and dial button for making and answering calls, as well as a receiver, which corresponds to a small speaker, and a transmitter, which corresponds to a microphone. It is also equipped with a cable and connector for connection to a terminal device.

The mobile telephone 7, like a normal telephone, can make a call to any subscriber in the communication network, for example the telephone 8, by turning off the hook switch and dialing the number of the other subscriber. In addition, the terminal device 6
If the identification code included in the incoming call signal matches the own identification code, the bell rings and the user can respond by turning off the hook switch.

In FIG. 1, a plurality of mobile telephones 7 can be connected to one terminal device 6. Mobile telephones 7 with different subscriber numbers may be connected to one terminal device 6.

FIG. 2 is a block diagram showing an example of the mobile telephone 7. As shown in FIG. Connector 71 connects the telephone line and data line to terminal device 6. The telephone line is input to a 2-wire/4-wire conversion circuit 81 via a switch 72, and then inputted to a receiver 73. On the other hand, the data signal on the data line is transmitted to the control circuit 77.
is input. The output of the transmitter 74 is connected to the switch 72 via a 2-wire 4-wire converter 1 negative circuit 81. Control circuit 77
The data signal from is input to the data transmitting/receiving circuit 80. Further, the power superimposed on the data line is separated by a data transmitting/receiving circuit 80 and supplied to a stabilized power supply circuit 82.

Control circuit 77 is constituted by a microprocessor and operates according to the contents of program memory 79.

Signals from dial button 75 and hook switch 76 as well as signals from PID memory 78 of mobile telephone 7 are also input to control circuit 77 .

FIG. 3 is a block diagram showing an example of the terminal device 6. As shown in FIG. The maximum number of connectors 61 for connection to the mobile telephone 7 is three in parallel, and connects a telephone line and a data line. The audio signal of the telephone line from the connector 61 is outputted to the two-wire wired transmission line 5 via the line relay 64.

Further, the data signal on the data line is input to the control circuit 67. A control signal from the control circuit 67 is input to the data transmitting/receiving circuit 62 . Data signals from data transmitting/receiving circuit 62 are transmitted to mobile telephone 7 via connectors 51a-c. A control signal transmitter/receiver 65 and a line relay 64 for opening and closing the DC loop are connected to the control circuit 67, which transmits and receives control signals to and from the line control device 4 and also opens and closes the DC loop. The purpose of opening and closing the DC loop is to notify the line control device 4 of the connection or disconnection of the wired transmission line when the mobile phone connects or disconnects. This means that there are two transmission paths from the terminal device 6 to the line control device 4.
This is an example of a wire system.

This transmission line can also transmit and receive control signals using a 4'A type transmission line and a modem, and in this case, a modem is provided. Alternatively, an optical fiber or a PCM transmission line may be used, and in that case, corresponding equipment will be installed. Also, a program memory 69 for the control circuit 67 composed of a microprocessor, a temporary memory memo 1J68 for identification code, and a dial signal transmitter 66
is connected to the control circuit 67. The power supply circuit 63 obtains a stabilized power output from a battery or a commercial power source, and superimposes it on the data line in the data transmission/reception circuit 62 to supply power to the connected mobile telephone 7 .

Figures 8 and 9 show other embodiments of mobile telephones and terminal equipment.

In the above example, the mobile telephone 7 and the terminal device 6 were explained as separate devices, but a control signal transmitter/receiver 65 and a dial signal transmitter 66 are added to the mobile telephone 7, and a wired transmission path such as a data transmitter/receiver circuit is set. - The release signal circuit can be omitted. In this case, the terminal device can have a simple structure of only a two-wire modular connector if it is a two-wire interface.

FIG. 8 is a block diagram of a mobile telephone having the above configuration. Compared to the mobile telephone 67 described in FIG. 2, a dial signal transmitter 101, a control signal transmitter/receiver 102, and a power supply circuit 103 are added, and the data transmitter/receiver circuit 80 is omitted.

The operations of each part are similar to those described for the mobile telephone 7 and the terminal device 6. FIG. 9 is a configuration diagram of the terminal device in this configuration. It has a simple configuration with only the connector 110.

FIG. 4 is a block diagram showing an example of the line control device 4. As shown in FIG. This is connected to a local exchange or private branch exchange 2. The plurality of subscriber lines 3 are accommodated in a line switching device 41 composed of a matrix switch, and are also accommodated in parallel in a central office line interface circuit 46. The control circuit 44 establishes an outgoing connection to the exchange 2 via the office line interface circuit 46 by closing the DC loop. In addition, in the case of an incoming call, the central office line interface circuit 4
6 detects an incoming signal such as 1611 z from the exchange 2 and inputs it to the control circuit 44 .

The m wired transmission lines 5 connected to the plurality of m terminal devices 6 are accommodated in the line switching device 41 similarly to the subscriber line 3, and the terminal device interface circuit 4
2 are also accommodated in parallel. The interface circuit 42 of the terminal device 6 detects the blockage of the DC loop from the terminal device 6, receives the identification code from the mobile phone a7, and sends it to the control circuit 44. Further, the control circuit 44 also controls the interface circuit 42 of the terminal device 6 in the case of an incoming call.
It sends an incoming call signal to the terminal device 6 and also sends out the identification code of the calling mobile telephone 7.

Thereafter, in response to a response from the mobile telephone 7, blockage of the DC loop of the terminal device 6 is detected and a response is detected. Regarding the blockage detection of the DC loop of the terminal device 6, this is an example when the subscriber wire 3 uses a two-wire transmission line, and when using a four-wire transmission line, digital transmission line, or optical fiber, etc. , the control signal transmitted using the modem will be detected. Further, in this case, the line switching device 41 is also provided with a device such as a modem.

The line switching device 41 accommodates a signal trunk 43 that includes a signal generation circuit that generates various service tones and a dialing signal transmission/reception circuit, generates various control signals and service tones, and transmits them to the terminal device. Send to 6.

The subscriber storage file 45 of the control circuit 44 of the circuit control device 4 contains the subscriber number of the subscriber line 3, the identification code of the mobile telephone 7 corresponding thereto, and the number of the terminal device 6 to be connected, or the like. Wired transmission line 5 to be connected
The identification number of the terminal device 6 is stored, and when a call is received, it is read out and the terminal device 6 to which the terminal device 6 has been moved is searched.

In order to accumulate the latest information on the terminal device 6 at the destination, when the mobile phone 7 moves or changes its location, when the location registration operation is performed from the nearest terminal device 6, the contents of the file 45 are saved. Update.

A procedure for transmitting a call request signal from the mobile telephone 7 and performing location registration processing will be explained.

Here, a case where the wired transmission line 5 is a two-wire transmission line will be taken as an example.

FIG. 5 is an explanatory diagram of the sequence of location registration processing. When the hook switch 76 of the mobile phone 7 is turned off,
The control circuit 77 of the mobile telephone 7 transmits a call request signal containing an identification code, which is a uniquely assigned identification number, via a data line. As a result, the switch 72 is closed to establish a wired transmission path with the terminal device 6. This call request signal is received by the terminal device 6 in the receiving state, and its identification code is temporarily stored. Further, after setting the wired transmission path, the terminal device 6 closes the DC loop on the wired transmission path 5 side. Thereafter, the identification code of the mobile telephone 7 temporarily stored is sent to the line control device 4, and at the same time, a dial tone is sent to the mobile telephone 7 to enable sending of a dial signal. The mobile phone 7 that received the dial tone receives the location registration information input by the user for location registration, such as a special dial signal (for example, "*").
The terminal device 6 temporarily stores the dial.

After receiving the identification code, the line control device 4 checks the identification code in a storage file 45 that manages the identification code, and if it is a registered identification code, sends out a confirmation signal. The location registration information (special dial) signal from the terminal device 6 is received and temporarily stored.

When the line control device 4 translates the special dial and confirms that it is a location registration, for example that the first digit is "*", the line control device 4 inputs the identification number of the wired transmission line 5 currently connected to the identification code management file 45. Remember.

When these location registration processes are completed, the line control device 4 sends out a location registration completion tone, and when the user who listens to this tone goes on-hook, the terminal device 6 processes the end of the call and opens the DC loop to control the line. Device 4 is restored.

FIG. 6 is an explanatory diagram of a calling sequence when calling any telephone 8 in the communication network.

This differs from the location registration sequence in that the user inputs the dial of any telephone 8 in the communication network in the same manner as a regular telephone instead of the location registration information. In FIG. 6, the sequence up to the point where the line control device 4 receives the dial signal is the same as the location registration sequence in FIG.

The line controller 4 translates the dialing signal, and when the first digit of the dialing signal is, for example, "O", the mobile telephone 7
The subscriber number of the subscriber line 3 corresponding to the identification code of is searched from the identification code file 45, and the subscriber number of the subscriber line 3 corresponding to the identification code of
After closing the flow loop and receiving the dial tone from exchange a2, the dials after the first "0" are sent to exchange 2. Further, after sending the dial signal, a ringback tone (RBT) is sent to the mobile telephone 7. After detecting the response from the exchange 2, the subscriber line 3 and the wired transmission line 5 are connected.

After that, the call is made just like a regular phone call.

FIG. 7 is an explanatory diagram of an incoming call sequence from an arbitrary telephone 8 in the communication network 1 to the mobile telephone 7. In FIG. This is an incoming call sequence in the case where the person carrying the mobile telephone 7 performs location registration every time he moves and changes terminal equipment.

When the incoming call signal 1611z is received from the exchange 2 in FIG. The number of the wired transmission line 5 connected to the terminal device 6 whose location is registered by the telephone 7 is stored in the identification code file 4.
Search from 5. An incoming call signal and an identification code are sent from the wired transmission line 5.

The terminal device 6 detects the incoming call signal from the line control device 4, receives the identification code, and temporarily stores it.

The terminal device 6 calls the mobile telephone 7 via the data line using the temporarily stored identification code. The bell ringing signal continues to be sent until there is a response.

When the user answers by turning off the hook switch 76 of the mobile telephone [7, the mobile telephone 7 sends a response signal to the terminal device 6 via the data line and closes the switch 72. When the terminal device 6 receives the response signal, it turns on the line relay 64 on the wired transmission line 5 side to close the DC loop.

When the line control device 4 detects this response, it connects the subscriber line 3 and the wired transmission line 5, closes the DC loop on the subscriber line 3 side, and responds. After that, the call will be made just like a regular phone call.

In the example shown in FIG. 8 in which the mobile telephone 7 and the terminal device 6 are integrated, the sequence is such that the transmission and reception of signals between the mobile telephone 7 and the terminal device 6 is omitted.

〔Effect of the invention〕

As explained above, by connecting a line control device to the subscriber line immediately after the exchange and centrally managing the location information of mobile telephones, mobile telephones can be used anywhere there is a terminal device that can register their location. Even if you move to , you can still make calls. Furthermore, even if the location changes due to desk rearrangement, etc., if there is a terminal device in the new location, the location can be registered there, thereby eliminating the need for wiring work for changing telephones.

In the scheme of the invention, the mobile device is small and inexpensive.

Moreover, the replacement equipment only requires adding additional equipment to a part of the equipment, and does not require large-scale equipment changes.

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram explaining the present invention in detail. FIG. 2 is a block configuration diagram showing an example of the configuration of a mobile telephone. FIG. 3 is a block configuration diagram showing an example of the configuration of a terminal device. FIG. 4 is a block configuration diagram showing an example of the configuration of a line control device. FIG. 5 is an explanatory diagram of the location registration sequence. FIG. 6 is an explanatory diagram of the transmission sequence. FIG. 7 is an explanatory diagram of the incoming call sequence. FIG. 8 is a block configuration diagram showing an example of the configuration of a mobile telephone including the functions of a terminal device. FIG. 9 is a diagram showing an example of the configuration of a terminal device portion in the case of a mobile telephone including terminal device functions. 1... Public telephone network, 2... Local exchange or private branch exchange, 3... Subscriber line, 4... Line control device, 5...
...Wired transmission line, 6... Terminal device, 7... Mobile phone, 8... Telephone, 9... Wired transmission line, 41
. . . Line switching device, 42 . . . Terminal device interface, 43 . . . Signal trunk, 44 . . Control circuit, 45 . ...Connector, 62...Data transmitting/receiving circuit, 63...Power supply circuit, 64...Line relay, 65...Control signal transmitting/receiving device, 66...
Dial signal transmitter, 67... control circuit, 68...
Temporary storage memory, 69...Program memory, 71.
...Connector, 72...Switch, 73...Telephone receiver, 74...Telephone transmitter, 75...Dial button, 76
...Hook switch, 77...Control circuit, 78...
・PID memory, 79...Program memory, 8o・
...Data transmission/reception circuit, 81...2-wire 4-wire conversion circuit,
82... Stabilized power supply circuit, 91... Connector, 92
... Line relay, 93 ... 2-wire 4-wire conversion circuit, 9
4...Telephone receiver, 95...Transmitter, 96...Dial, 97...Hook switch, 98...Control circuit,
99... PID memory, 100... Program memo IJ, 101... Dial signal transmitter, 102...
Control signal transmitter/receiver, 103...Power supply circuit, 110
···connector. Patent applicant: Nippon Telegraph and Telephone Corporation Representative: Patent attorney: Naotaka Ide ・′! 41 Figure ＾ 5 Mouth contact 2 Mouth gland wisdom] 弯 1-644 Terminal handle 6 Mobile phone 7 claw 6 Figure 2
6 Talk about moving 7y117 group

Claims (2)

[Claims] (1) In a telephone switching system in which a subscriber number is assigned to a subscriber line accommodated in an exchange connected to a switching network, and exchange connections are made using this subscriber number, multiple specified subscribers among the above subscriber numbers Regarding the number, the subscriber line is connected to a line control device, and a number of terminal devices are connected to the line control device via a number of wired transmission lines, and a plurality of mobile telephones each having the above-mentioned specific subscriber number assigned are connected to the line control device. The mobile phone has a structure that allows it to be detachably connected to any of the above terminal devices, and the specified telephone automatically transmits an identification code corresponding to the subscriber number to the line control device via the terminal device. The line control device is characterized by comprising means for automatically connecting the wired transmission line to the corresponding subscriber line in accordance with the identification code received from the wired transmission line. Telephone exchange system. (2) Claim No. 3 (2) Billing based on subscriber number
Telephone switching system described in section 1).