JPH08116565A - Mobile communication network connection system for on-premises electronic exchange - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] When connecting a private branch electronic exchange to a public network, it is possible to use the line of one mobile phone from multiple extensions without the need for a wired line connection. To realize the mobile communication network connection system. [Structure] Between the private branch exchange 10 and the mobile phone 30,
An analog line control unit 21 that controls communication with a local line trunk 14 accommodated in a private branch exchange, a mobile phone control unit 22 that controls communication with a mobile phone, and an analog line control unit and a mobile phone control unit control Control unit 23
A mobile phone connection device 20 including an antenna coupling part 24 for coupling the output from the mobile phone to an antenna and a power supply part 25 for supplying power to each part and the mobile phone, and the private branch exchange as the mobile phone connection device. Then, it connects to the mobile phone and connects to the public network via the mobile communication network.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication network connection system for a private electronic exchange for connecting a private electronic exchange to a mobile communication network.

With the progress of communication technology and semiconductor technology, it has become possible to obtain inexpensive semiconductors that can be used at radio frequencies, and mobile phones have come to be used in a wide range.

It is desired to expand the range of use of the mobile phone by linking the mobile phone with the private branch exchange and connecting to the mobile communication network.

[0004]

2. Description of the Related Art FIG. 18 is a diagram for explaining a conventional example. In the figure, 100 is a public network, 200 is a mobile communication network, and 10
Is a private branch exchange (hereinafter referred to as PBX), T11 to T
1n is a telephone housed in the PBX 10, T21 to T2n
Is a telephone housed in the public network 100, 30A to 30C are mobile telephones, PC is a personal computer, and F is a facsimile. LA and LB are the public network 100 and P.
It is a wired line that connects the BX 10.

The figure shows the PB originally installed in the area A.
An example in which X10 is moved to the installation location B is shown. The equipment used is the same, only the installation location is changed.
Further, in the figure, the personal computer PC and the facsimile F can be connected to the mobile communication network 200 via a mobile phone (here, the mobile phone is connected via 30A, but any mobile phone is also possible). Communication network 200
It is also possible to communicate with any terminal connected to the mobile communication network 200 and any terminal accommodated in the public network 100 connected via the mobile communication network 200.

[0006]

The PBX 10 is connected to the public network 1
To connect to 00, it is necessary to connect between them by a wired line LA. For example, when the PBX 10 in the area A is relocated to the area B, it is necessary to connect the PBX 10 and the public network 100 with the wired line LB, construction of connection change is required, and the telephone number is changed due to the change of the installation location. It may change.

Further, although communication by a personal computer PC and a facsimile F is possible via the mobile phone 30A, these are connected one-to-one and can be used alone.

According to the present invention, when connecting a private branch exchange to a public network, one mobile phone can be used from a plurality of extensions without requiring a connection by a wired line. Try to realize.

[0009]

FIG. 1 is a block diagram for explaining the principle of the present invention. Reference numeral 10 in the figure is a central control unit 1.
1, a main memory 12, a network 13, an office line trunk 14, and a line circuit 15, and T1 is P
A telephone accommodated in the BX 10, 30 is a communication circuit 31, a control unit 32, a transmission unit 33, a reception unit 34, and a DUP (Duplexer).
The mobile phone includes a transmitter 35, a transmitter 36, a receiver 37, and a power supply unit 38.

Further, 20 is provided according to the present invention, and is a portable telephone connection device for connecting the PBX 10 and the portable telephone 30, and an analog line control unit 21 and a portable telephone 30 for controlling communication with the office line trunk 14 of the PBX 10. A mobile phone control unit 22, which controls communication with the mobile phone, an analog line control unit 21, a control unit 23 which controls the mobile phone control unit 22, an antenna coupler 24 which couples the output from the mobile phone 30 to an antenna, and a power supply for each unit. Power supply 2
It is composed of 5.

The mobile phone connection device 2 is provided with such means.
0 uses the line control function of the mobile phone 30 to
The mobile telephone connection device 20 is a telephone T1 housed in
The public network 100 is connected via.

[0012]

Operation FIG. 2 is a sequence diagram (1) for explaining the operation of the present invention. According to the first aspect of the present invention, when the telephone housed in the PBX 10 makes a call to the public network 100, the telephone line special number is dialed to capture the telephone line trunk 14, and the mobile telephone connecting device 20 connected to the telephone line trunk 14 Activates the mobile phone 30, and the mobile phone 30 establishes a wireless link. Then, from the telephone T1 to the mobile communication network 20
0 or the telephone number of the partner telephone accommodated in the public network 100 is dialed, and after the partner terminal responds, a connection is established and a call is made with the public network 100 via the mobile communication network 200.

FIGS. 3, 4, and 5 are sequence diagrams (2), (3), and (4) for explaining the operation of the present invention. FIG. 3 shows the case of disconnecting a call from the telephone set T1 accommodated in the PBX 10. 4 is a sequence of incoming calls from the mobile communication network 200. A call received at the mobile phone 30 connected to the central line trunk 14 of the PBX 10 is accommodated in the PBX 10 via the central line trunk 14. FIG. 5 shows a sequence for terminating a call from the mobile communication network 200, and FIG.

In claim 2, the office line trunk 14 of the private branch exchange 10 of claim 1 is replaced with the office line trunk 14a corresponding to the ISDN interface, and the portable telephone connecting device 2
0 analog line controller 21 to ISDN line controller 21
By replacing it with a, two mobile phones 3 corresponding to the 2B + D information channels B1 and B2 of the ISDN line
It becomes possible to connect 0A and 30B and talk.

In claim 3, the mobile phone connection device 20
Is mounted on the trunk line trunks 14 and 14a of the PBX 10, and it is possible to make the entire system economical and reduce the installation space.

In claim 4, the portable telephone connection device 20
A display device is provided on the display to indicate that the mobile phone 30 is in use. This display makes it possible to prevent the mobile phone 30 being used from being removed.

In claims 5 to 10, the display management data D3, the charging rate data D4, the charge management data D5, the contract condition management data D6, the line blocking data D7, and the removal regulation are stored in the main storage device 12 of the private branch exchange 10. Data D
8. Connection management data D9 and mobile phone charge data D10 are provided, and connection management and operation management of the PBX 10 are performed according to the respective data.

According to the eleventh and twelfth aspects, an external interface 39 for reading the contents of the memory 32A connected to the control unit 32 of the mobile phone 30 is provided, and when an incoming call is received on the central line trunk 14 connected to the mobile phone 30, Memory 32
The telephone number of the calling side telephone written in A is read out through the external interface 39, and the receiving side telephone T
1 is provided, and the mobile phone connection device 2 is provided with the mobile phone charge data D10 for accumulating the call charge when a call is made using the mobile phone connection device 20 in the PBX 10.
Accurate charge management can be performed by reading the call charge when making a call using 0 from the memory 32A through the external interface 39 and accumulating the call charge in the mobile phone charge data D10 of the PBX 10.

[0019]

FIG. 6 is a block diagram for explaining an embodiment (1) of the present invention. The figure is an embodiment corresponding to claim 1,
Reference numeral 10 in the figure is the same as the PBX described in the principle diagram.

Reference numeral 20 is a mobile phone connection device,
A mobile phone holder (shown as a holder in the figure) 20A is provided so that the mobile phone 30 and the mobile phone connection device 20 can be mechanically held and installed.

In the present invention, control of a wireless line such as establishment of a wireless link is performed by the control unit 3 (not shown) of the mobile phone 30.
2 runs. A coupler 24B for coupling the radio output signal from the mobile phone 30 to the antenna and a booster 24A for powering up the output are provided.

FIG. 7 shows a transmission processing flowchart of the embodiment of the present invention. The operation of the embodiment will be described below in accordance with STEP of the flowchart (hereinafter referred to as S). S1: The telephone T11 (whose telephone number is 111) housed in the PBX10 goes off-hook, so that the PBX1
0 detects an outgoing call.

S2: The telephone T11 is a special number for calling to the office line trunk 14 to which the mobile telephone 30 is connected, for example, "8".
The PBX 10 receives the dial "8" and activates the trunk line trunk 14.

S3: Control unit 2 of mobile phone connection device 20
When the mobile phone 3 detects a call through the analog line controller 21, the mobile phone controller 22 is activated to bring the mobile phone 30 into the outgoing call state to establish a wireless link.

S4: The start completion is notified to the central line trunk 14. S5: The PBX 10 detects the activation of the mobile phone 30. S6: Dial "4441111" from the telephone T11
When (DP or PB is good), PBX10
Converts this dial "4441111" into a PB signal and sends it out.

S7: The mobile phone connection device 20 sends a dial "4441111" through the mobile phone 30. S8: The mobile communication network 200 calls the telephone T21 having the telephone number “4441111” accommodated in the public network 100.

S9: The call state is established by the response from the telephone T21 of the other party. S10: When the call ends, the disconnection from the telephone T11 on the PBX 10 side is detected, and the disconnection notification is given to the mobile phone connection device 20.

S11: The mobile phone connection device 20 detects the disconnection notice from the central line trunk 14, disconnects the mobile phone 30, and releases the wireless link. FIG. 8 shows an incoming call processing flowchart of the embodiment of the present invention. In this case, the telephone number of the mobile phone 30 is set to "0302221111", and when an incoming call arrives at the mobile phone 30, it is set so as to reach the telephone T11 (phone number 111) via the trunk line trunk 14 of the PBX 10.

Here, the telephone number "0302211111" of the mobile telephone 30 is dialed from the telephone T21 of the public network 100. With this dial, the mobile phone 30 is called from the mobile communication network 200. This mobile phone 3
The incoming call to 0 is detected by the mobile phone controller 22 of the mobile phone connecting device 20, and the incoming call is notified to the office line trunk 14 via the analog line controller 21. The central control device 11, which has detected the incoming notification, calls the telephone T11. Then, in response to the response from the telephone T11, the analog line controller 21 detects a response signal, and the mobile telephone controller 22
The response control of the mobile phone 30 is performed to enter the call state.

After the call, the telephone T11 is disconnected,
The mobile phone connection device 20 detects the disconnection signal, and the mobile phone control unit 22 controls the disconnection of the mobile phone 30 to end the call.

By the processing described with reference to FIGS. 7 and 8, the telephone T11 does not need to be aware of the mobile telephone 30 and simply dials the calling special number to the trunk line trunk 14 and the other party's telephone number to open the mobile communication network 200. Through this, a telephone call with a subscriber connected to the public network 100 becomes possible.

In this way, by connecting the PBX 10 and the public network 100 via the mobile phone 30, the PB
Even if X10 is relocated, the construction of the wired line is not required and the subscriber number will not be changed.

FIG. 9 is a block diagram for explaining an embodiment (2) of the present invention. The drawing is an embodiment utilizing the configuration of claim 1. An area for managing the states of the office line trunks 14 and 14A is provided in the main storage device 12 of the PBX 10 in the figure, and the trunk control data D1 and the detour control data D2 designating the detour destination are written therein. . Where P
Telephone T1 housed in BX10 is a trunk line trunk 14A.
From the trunk line 14A when calling from the public network 100 to the public network 100.
If it cannot be used due to all troubles, all uses, etc., the call is automatically sent via the station line trunk 14 side and connected to the public network 100 via the mobile communication network 200.

Further, FIG. 9 shows a detouring process when making a call from the telephone set T11 housed in the PBX 10. On the contrary, when an incoming call comes from the mobile communication network 200, the PB
Station line trunk 14 connected to the X10 mobile phone 30
The voice guidance data corresponding to the telephone T11 connected to the telephone is provided, and the telephone T21 of the public network to the mobile telephone 30 is provided.
When the mobile phone 30 is removed from the mobile phone holder 20A when the phone number “0302221111” is dialed, the mobile phone 30 receives the call, and when the mobile phone 30 is attached to the mobile phone holder 20A, An announcement machine (not shown) receives an incoming call via the trunk line trunk 14, notifies the user of the mobile phone 30 of the telephone number, and provides guidance to redial the call so that a cheap wire line can be used. You can make a call.

FIG. 10 is a block diagram for explaining an embodiment (3) of the present invention. The figure shows an embodiment in which communication is carried out using an ISDN interface. The office line trunk 14 for analog lines in the PBX 10 described in FIG. 2 is used as the office line trunk 14a for ISDN, and the analog line control unit in the mobile phone connection device 20. By changing 21 to an ISDN line control unit 21a compatible with ISDN, it becomes possible to perform communication with the ISDN interface.

At this time, the ISDN interface 2B +
Corresponding to the information channels B1 and B2 of D, two mobile phones 30A and 30B can be connected. FIG. 11 is a block diagram for explaining the embodiment (4) of the present invention. The drawing shows an embodiment corresponding to claim 3. In the electronic exchange, the function of each unit for performing the exchange process is mounted on the printed board unit. In the embodiment (4), the analog line control unit 21, the mobile phone control unit 22, the control unit 23 of the mobile phone connection device 20 described in FIG.
The booster 24A and the coupler 24B are mounted on the same printed circuit board unit as the central line trunk 14.

With such a configuration, power is supplied to the portable telephone connection device 20 from the PBX 1 (not shown).
It is possible to use the power supply on the 0 side, the power supply unit 25 in the mobile phone connection device 20 can be reduced, and the overall economy and the installation space of the mobile phone connection device 20 can be reduced.

Although the connection between the PBX 10 and the portable telephone connection device 20 is described as an analog interface in FIG. 11, the ISDN interface in FIG. 10 can be similarly configured.

FIG. 12 is a block diagram for explaining an embodiment (5) of the present invention. The drawing shows an embodiment corresponding to claims 5 and 6. The configuration shown is the control unit 2 of the mobile phone connection device 20.
3 is provided with a lamp L as a display device, and the main storage device 12 of the PBX 10 is provided with display management data D3.

When the mobile phone connection device 30 detects a call from the PBX 10 or an incoming call to the mobile phone 30, the lamp L connected to the control unit 23 is turned on,
When each disconnection is detected, the lamp L is turned off.

Since the display of the lamp L as described above makes it possible to confirm that the mobile phone 30 connected to the mobile phone connection device 20 is in use, the mobile phone holder 20 is in use.
The removal from A can be prevented.

Further, in the display management data D3 of the PBX 10, when the mobile phone 30 is removed from the mobile phone holder 20A, it is recorded that there is no connection, and the lamp L of the phone T11 (here, a multifunctional phone) is turned on. To do. Telephone T
Reference numeral K in 11 denotes a key for sending a dial, and H denotes a handset for making a call. Furthermore, when the mobile phone 30 is connected and in use, the lamp L of the phone T11 is used.
Lights up. By such a lighting display of the telephone set T11, it is possible to know whether or not the station line trunk 14 can be used.

FIG. 13 is a block diagram for explaining an embodiment (6) of the present invention. In the figure, the charging rate data D4 for writing the mobile phone charging rate and the wire line charging rate and the charge management data D5 are written in the main storage device 12 of the PBX 10. Telephone T11 housed in PBX 10 with this configuration
When you make a call from and make a call, the call charge for each line used is calculated for each telephone T1i, and the line charge (denoted as wire use in the figure) and mobile phone line charge (Fig. (Indicated as medium mobile usage fee). It is possible to temporarily increase the number of lines by connecting the privately owned mobile phone 30 to the PBX 10. By adopting such a configuration, the privately owned mobile phone 30 can be used in a company where the individual works. , PBX10, when used for business, it is possible to charge the call charge to the company.

FIG. 14 is a block diagram for explaining an embodiment (7) of the present invention. The figure shows an embodiment corresponding to claim 7. The operator of the mobile communication network 200 is not limited to NTT,
Multiple businesses are providing services. In addition, the fees vary depending on the contract conditions. Therefore, the contract condition management data D6 for recording such contract condition management data D6 is provided in the PBX 10.

In this embodiment, the mobile telephone 3 of the operator A and the contract condition A (for example, no regulation) is installed in the office line trunk 14A.
0A is connected, and the contract condition B (for example, only available on Saturday, Sunday and weekday nights) is used by the operator A for the trunk line trunk 14B.
Mobile phone 30B of the contract line A is connected to the trunk line 14C by the business operator B.

When the telephone line transmission special number "8" is dialed from the telephone T11 of the PBX 10, the central control unit 1
Reference numeral 1 refers to the contract condition management data D6 to capture and transmit any of the station line trunks 14A to 14C to which the available and cheapest mobile phone 30i is connected. By such processing, the call charge can be reduced.

FIG. 15 is a block diagram for explaining an embodiment (8) of the present invention. The figure shows an embodiment corresponding to claims 8 and 9. In the figure, the PBX 10 is provided with line blocking data D7 and removal restriction data D8.

Here, when the mobile phone 30 is connected to the mobile phone connecting device 20, the mobile phone connecting device 20 is connected.
When the mobile phone 30 is removed from the mobile phone connection device 20 by registering the line blocking data D7 as "connected" by notifying the PBX 10 of "connected" via the office line trunk 14 from , "No connection" is notified, and the line blocking data D7 is registered as "No connection", whereby the station line trunk 14 is automatically blocked. In this state, when the telephone line is transmitted from the telephone T11, the use is prohibited by referring to the line blocking data D7.

Further, the PBX 10 is provided with the removal regulation data D8 for writing the regulation for removing the mobile telephone 30 and the data for managing whether or not the mobile telephone 30 is connected. The presence / absence of the restriction of removal from the telephone T11 of the PBX 10 is registered here. Then, the mobile phone connection device 20
By notifying the PBX 10 that the mobile phone 30 has been connected to the PBX 10 via the mobile phone connection device 20, the removal regulation data D8 is set to "connection present". In this state, if the PBX 10 is notified that the mobile phone 30 is removed from the mobile phone holder 20A of the mobile phone connection device 20 without performing the release setting of the removal restriction data D8, the alarm device 16 is activated. By doing so, an alarm can be generated and the mobile phone 30 can be prevented from being stolen.

FIG. 16 is a block diagram for explaining an embodiment (9) of the present invention. The figure shows an embodiment corresponding to claim 10. In the figure, the PBX 10 is provided with connection management data D9.

In the connection management data D9, the mobile telephone 30 is registered as the transfer destination of the telephone T11 housed in the PBX 10. Then, from the mobile phone connection device 20, P
The BX 10 is notified whether or not the mobile phone 30 is connected, and is registered in the connection management data D9.

When there is an incoming call to the telephone set T11, the central control unit 11 refers to the connection management data D9 at the incoming call to the telephone set T11, and when the mobile telephone 30 is connected, the incoming call process to the telephone set T11 is performed. When the mobile phone 30 is not connected, the transfer is performed to the mobile phone 30 registered as the transfer destination. With such a configuration, it becomes possible to make an incoming call to a designated terminal depending on the detached state of the mobile phone 30.

FIG. 17 is a block diagram for explaining the embodiment (10) of the present invention. The drawing shows an embodiment corresponding to claims 11 and 12. The configuration shown in FIG.
An external interface (indicated by INF in the drawing) 39 for reading the contents of A is provided, and the PBX 10 is provided with mobile phone charge data D10 for accumulating the usage charge of the mobile phone 30.

In this structure, when an incoming call arrives at the mobile phone 30, the telephone number of the originating telephone T21 written in the memory 32A of the mobile phone 30 is read out via the external interface 39, and a trunk line trunk is sent to the PBX 10. Transfer via 14

The PBX 10 passes through the line circuit 15
Transfer this data to the telephone T11 and
The telephone number of the source telephone T21 is displayed on the display DPY (here, a multifunction telephone).

Further, in the PBX 10, it is also possible to regulate the incoming call by the telephone number of the transmission source telephone T21 taken out from the memory 32A of the portable telephone 30. Furthermore, when a call is made using the mobile phone 30, when the call is completed, the mobile communication network 200 notifies the call charge for the call. Therefore, accurate call management can be performed by taking out the call charges notified from the mobile communication network 200 and written in the memory 32A via the external interface 39 and accumulating them in the mobile phone charge data D10 of the PBX 10.

[0057]

According to the present invention, by providing a portable telephone connecting device for connecting and controlling a portable telephone to the central line trunk of the private electronic exchange, it becomes possible to connect the private electronic exchange and the mobile communication network. It is possible to use the line of one mobile telephone from a plurality of telephones accommodated in the private branch exchange.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the principle of the present invention.

FIG. 2 is a sequence diagram (1) for explaining the operation of the present invention.

FIG. 3 is a sequence diagram (2) for explaining the operation of the present invention.

FIG. 4 is a sequence diagram (3) explaining the operation of the present invention.

FIG. 5 is a sequence diagram (4) for explaining the operation of the present invention.

FIG. 6 is a block diagram illustrating an embodiment (1) of the present invention.

FIG. 7 is a flowchart of a call origination process according to the embodiment of this invention.

FIG. 8 is an incoming call processing flowchart of the embodiment of the present invention.

FIG. 9 is a block diagram illustrating an embodiment (2) of the present invention.

FIG. 10 is a block diagram illustrating an embodiment (3) of the present invention.

FIG. 11 is a block diagram illustrating an embodiment (4) of the present invention.

FIG. 12 is a block diagram illustrating an embodiment (5) of the present invention.

FIG. 13 is a block diagram illustrating an embodiment (6) of the present invention.

FIG. 14 is a block diagram illustrating an embodiment (7) of the present invention.

FIG. 15 is a block diagram illustrating an embodiment (8) of the present invention.

FIG. 16 is a block diagram illustrating an embodiment (9) of the present invention.

FIG. 17 is a block diagram illustrating an embodiment (10) of the present invention.

FIG. 18 is a diagram illustrating a conventional example.

[Explanation of symbols]

 10 PBX 11 Central control device 12 Main storage device 13 Network 14, 14A to 14C, 14a Station line trunk 15 Line circuit 16 Alarm device 20 Mobile phone connection device 20A Mobile phone holder part 21 Analog line control part 21a ISDN line control part 22 Mobile phone Telephone control unit 23, 32 Control unit 24 Antenna coupler 24A Booster 24B Coupler 25, 38 Power supply unit 30, 30A to 30C Mobile phone 31 Calling circuit 32A Memory 33 Transmitter 34 Receiver 35 DUP 36 Transmitter 37 Receiver T1, T11 to T1n, T21 to T2n Telephone L lamp K key H Handset DYP display PC Personal computer F Facsimile 100 Public network 200 Mobile communication network D1 Trunk control data D2 Detour control data D3 Display tube Processing data D4 Charge rate data D5 Charge management data D6 Contract condition management data D7 Line blocking data D8 Removal restriction data D9 Connection management data D10 Mobile phone charge data LA, LB Wired line

Claims (12)

[Claims] 1. A connection system for connecting a private branch exchange and a mobile communication network, wherein an analog line control unit for controlling communication with a station trunk accommodated in the private branch exchange and communication with a mobile phone. A mobile phone control unit that controls, a control unit that controls the analog line control unit and the mobile phone control unit, an antenna coupling unit that couples an output from the mobile phone to an antenna, and each unit and the mobile phone. A mobile phone connection device having a power supply unit for supplying power is provided, and the private branch exchange is provided by the mobile phone connection device.
A mobile communication network connection system for a private electronic switch, which is connected to a mobile phone and is connected to a mobile communication network and a public network. 2. The mobile communication network connection system for a private electronic exchange according to claim 1, wherein the analog line control unit is an ISDN line control unit. system. 3. The mobile communication network connection system for a private electronic exchange according to claim 1 or 2, wherein the mobile phone connection device is mounted on a trunk line trunk of the private electronic exchange. Mobile communication network connection system for electronic exchanges on the premises. 4. The mobile communication network connection system for a private branch exchange according to claim 1 or 2, wherein the mobile phone connection device is provided with an indicator for displaying that the mobile phone is in use, and the control section is the When it detects that the mobile phone is in use,
3. A display is made on the display unit.
A mobile communication network connection system for a private branch exchange as described. 5. The mobile communication network connection system for a private branch exchange according to claim 1 or 2, wherein display management data for recording a usage state of the trunk line trunk is provided in a main memory of the private branch exchange. The mobile communication network connection of a private branch exchange according to claim 1 or 2, wherein the use status of the trunk is recorded as the display management data, and the information is displayed on a multi-function telephone housed in the private branch exchange. system. 6. The mobile communication network connection system for a private branch electronic exchange according to claim 1 or 2, billing rate data recording a mobile phone billing rate and a wired line billing rate in a main storage device of the private branch electronic exchange, and for each telephone set. The fee management data for accumulating the cable line usage fee and the mobile phone usage fee is provided, and the fee for using the station line trunk to which the mobile phone is connected is independent of the fee for using the wired line. 3. The mobile communication network connection system for a private branch exchange according to claim 1, wherein the charge management data is recorded and managed for each telephone and each trunk line trunk. 7. The mobile communication network connection system for a private electronic exchange according to claim 1 or 2, wherein contract condition management data for recording a business operator operating a mobile phone system and contract conditions is stored in a main storage device of the private electronic exchange. 2. The station line trunk to be used is selected by referring to the contract condition management data when making a call from a telephone housed in the private branch exchange through the station line trunk. 2. A mobile communication network connection system for a private branch exchange according to 2. 8. The mobile communication network connection system for a private branch electronic exchange according to claim 1 or 2, wherein the main memory of the private branch electronic exchange is provided with line blocking data for managing blocking of the branch trunk. An abnormality detection unit for detecting an abnormality of the mobile phone connection device is provided in the mobile phone connection device, and when the abnormality detection unit detects an abnormality of the mobile phone connection device, an abnormality occurrence is recorded in the line blockage data, and the trunk line trunk is recorded. 3. The premises according to claim 1, wherein when the abnormality detecting unit stops detecting an abnormality, the abnormality record of the line block data is erased and the block of the office line trunk is released. Mobile communication network connection system for electronic exchanges. 9. The mobile communication network connection system for a private electronic exchange according to claim 1 or 2, wherein the main storage device of the private electronic exchange is provided with removal restriction data for managing removal of the mobile phone, and the removal restriction data is added to the removal restriction data. 3. The mobile communication network connection system for a private branch exchange according to claim 1, wherein an alarm is output from an alarm device of the mobile phone connection device when the mobile phone is removed during registration of removal regulations. . 10. The mobile communication network connection system for a private electronic exchange according to claim 1, wherein the main storage device of the private electronic exchange is provided with connection management data for managing the connection of the mobile phone, and the connection of the mobile phone is provided. In the meantime, when an incoming call arrives at the telephone corresponding to the trunk line trunk, the incoming call processing to the telephone is performed, and the mobile telephone is not connected,
3. The mobile communication of the private branch exchange according to claim 1, wherein, when an incoming call is received at the telephone corresponding to the trunk line trunk, a calling process to the mobile telephone is performed with reference to the connection management data. Network connection system. 11. The digital mobile phone is provided with an external interface for reading out the contents of the memory, and when an incoming call is received on a trunk line trunk connected to the mobile phone, the telephone number of the received calling side telephone is set to the receiving side telephone. A mobile communication network connection system for a private branch electronic exchange, characterized by being displayed on. 12. The mobile communication network connection system for a private branch electronic exchange according to the preceding paragraph, wherein the private branch electronic exchange is provided with mobile phone charge data for accumulating a call charge sent through the external interface, and the mobile phone. A call charge when a call is originated from the office line trunk connected to the mobile telephone, is read from the memory of the digital mobile phone via the external interface,
12. The mobile communication network connection system for a private electronic exchange according to claim 11, wherein the data is stored in mobile phone charge data of the private electronic exchange.