JP2010238036A - Communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily change the range of a remote access without making it necessary to perform any complicate setting change. <P>SOLUTION: A PC 20 performs remote access through a portable telephone set 10A, a mobile communication network 30A and the Internet 30B to an enterprise server device 50. When remote access starts, data to which the PC 20 is able to perform remote access are restricted in the enterprise server device 50. In this case, when a voice communication line is connected between the portable telephone set 10A and the portable telephone set 10B, a monitor server device 40 transmits a message to instruct the enterprise server device 50 to increase the access range of the remote access to the enterprise server device 50. When receiving the message, the enterprise server device 50 increases the range of data to which the PC 20 is able to perform remote access. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a technique for changing access authority in communication.

  As an invention for controlling remote access from a terminal, for example, there is an invention disclosed in Patent Document 1. In the present invention, information on a user who is scheduled for remote access and the scheduled remote access time zone of the user are acquired. The user is permitted remote access to the server during this time period, and is not permitted remote access to the server outside this time period.

JP 2008-226058 A

  By the way, a user who performs remote access may need to change the access authority to the server for urgent reasons. In the invention disclosed in Patent Document 1, since remote access is permitted only during a predetermined time period, information necessary in an emergency cannot be obtained from the server. Although it is possible to contact the server administrator and request to change the access authority, in this case, it is necessary to contact the administrator, which is troublesome for the administrator.

  An object of the present invention is to make it possible to easily change the range of remote access without requiring complicated setting changes.

  The communication system according to the present invention includes a connection state of data communication with a predetermined data communication destination and a predetermined voice communication destination in a terminal capable of performing both data communication and voice communication simultaneously. The state storage means for storing the connection state of the voice communication, the connection state of the data communication stored in the state storage means, and the connection state of the voice communication stored in the state storage means indicate connection. A message transmission means for transmitting a message for changing the access range to a predetermined server apparatus, a data storage means for storing data so as to be accessible from the terminal, and the message Receiving means for receiving a message sent by the sending means, and accepting access from the terminal to the data stored in the data storage means And an access range changing unit that changes an access range when the terminal accesses the data stored in the data storage unit according to the content of the message received by the receiving unit. 2 server devices.

In the communication system according to the present invention, the predetermined voice communication destination in the state storage means may be the second server device, and the second server device may establish a voice communication line with the terminal.
In the communication system according to the present invention, there are a plurality of predetermined voice communication destinations with which the terminal performs voice communication, and the state storage means stores a connection state of voice communication for a plurality of voice communication destinations. Also good.

  According to the present invention, the range of remote access can be easily changed without requiring complicated setting changes.

The figure which showed the whole structure of the system which concerns on one Embodiment of this invention. The figure which illustrated the format of the subscriber database. The block diagram which showed the hardware constitutions of the mobile telephone. The block diagram which showed the hardware constitutions of the monitoring server apparatus. The figure which illustrated the format of the monitoring table. The block diagram which showed the hardware constitutions of the company server apparatus 50. FIG. The flowchart which showed the flow of the process which CPU402 performs.

[Embodiment]
(overall structure)
FIG. 1 is a diagram illustrating the overall configuration of a system according to an embodiment of the present invention. In this system, there are a large number of mobile phones, server devices and personal computers (hereinafter referred to as PCs). In order to prevent the drawing from becoming complicated, FIG. 1 shows mobile phones 10A and 10B, a PC 20, and a monitor. Only the server device 40 and the company server device 50 are shown.

  The mobile communication network 30A is a communication network that conforms to, for example, IMT-2000 and uses W-CDMA (Wideband-Code Division Multiple Access) as a communication method. The mobile communication network 30A is a radio base station that performs radio communication with a mobile phone, an exchange connected to the radio base station, an exchange and a gateway exchange connected to a fixed telephone network, and a gateway exchange and the Internet 30B for data communication. It has a gateway server (all not shown) for relaying, a subscriber database 35, and a monitoring server device 40. The mobile communication network 30A is a data communication service that uses a call service or packet communication for a mobile phone 10A or 10B owned by a person who has signed a subscription with a communication carrier that operates the mobile communication network 30A. Provide service. The mobile communication network 30A relays communication performed between the apparatus connected to the Internet 30B and the PC 20 connected to the mobile phone 10A.

The corporate server device 50 is a computer device that functions as a server of a client-server system, and is connected to the Internet 30B and installed in a corporate office. The company server device 50 receives remote access from the PC 20 used by an employee working in the company that owns the server device, stores data sent from the PC 20 used by the employee, and the employee uses the stored data. Send to PC20.
Further, the enterprise server device 50 receives the message transmitted from the monitoring server device 40, changes the authority of remote access from the PC 20 according to the received message, and changes the data accessible by the PC 20.

The mobile phones 10A and 10B (hereinafter, abbreviated as the mobile phone 10 when there is no need to distinguish individual mobile phones in particular) are mobile phones owned by a user (not shown), and the mobile communication network 30A. You can receive various communication services provided by. The mobile phone 10 is a mobile phone that conforms to IMT-2000 and uses W-CDMA as a communication method in the same manner as the mobile communication network 30A, and has a multicall function capable of performing data communication during voice communication. is doing.
In the following description, it is assumed that the cellular phone 10B is used by an administrator of the company server device 50, and the cellular phone 10A is used by employees working in the company that owns the company server device 50.

  The PC 20 is a laptop PC (Persona Computer) used by a user of the mobile phone 10A, and functions as a client of a client-server system. The PC 20 can connect to the mobile phone 10A, and can perform data communication with the enterprise server device 50 via the mobile communication network 30A by using the data communication function of the mobile phone 10A.

  The subscriber database 35 is a database that stores data related to subscribers who have contracted with a communication carrier that operates the mobile communication network 30A to use the mobile communication network 30A. In the subscriber database 35, as illustrated in FIG. 2A, the telephone number of the mobile phone 10 owned by the subscriber, the data communication performed by the mobile phone 10 in association with the name of the subscriber. , The state of voice communication performed by the mobile phone 10, the telephone number of the voice communication connection destination of the mobile phone 10, the data communication destination of the mobile phone 10, and the like are also stored. Note that the information stored in the subscriber database 35 is not limited to the one shown in the figure, and various information relating to subscribers is stored. As for the connection destination and the communication state, these pieces of information are sent from the exchange constituting the mobile communication network 30A and the sent information is stored.

  The monitoring server device 40 is a computer device that monitors communications performed by the mobile phone 10. The monitoring server device 40 acquires data stored in the subscriber database 35 and transmits a message to the company server device 50 based on the acquired data. The data acquired from the subscriber database 35 and the message transmitted to the company server device 50 will be described later.

(Configuration of mobile phone 10)
FIG. 3 is a diagram illustrating a hardware configuration of the mobile phone 10. As shown in FIG. 3, each unit of the mobile phone 10 is connected to the bus 101. Each unit of the cellular phone 10 exchanges data between the units via the bus 101.

The communication unit 108 has a function as an interface for performing wireless communication, and is controlled by a CPU (Central Processing Unit) 102 via an antenna (not shown) connected to the communication unit 108. Wireless communication is performed with the wireless base stations constituting the communication network 30A. The communication unit 108 can perform voice communication and data communication at the same time, and transmits and receives digitized voice signals and data used in data communication.
When the communication unit 108 receives the digitized voice signal or data transmitted from the radio base station, the communication unit 108 outputs the voice signal to the call unit 109 and the data to the CPU 102. When the data output from the CPU 102 is input, the communication unit 108 transmits this data to the radio base station. When the digitized audio signal output from the call unit 109 is input, the communication unit 108 transmits this audio signal to the radio base station.

  The call unit 109 has a microphone and a speaker (not shown). When voice is input to the microphone, the call unit 109 generates a voice signal obtained by digitizing the input voice and outputs the voice signal to the communication unit 108. In addition, when the digitized audio signal output from the communication unit 108 is input to the call unit 109, the audio signal is converted into an analog signal and output to the speaker.

  The interface unit 110 has a function as an interface for performing data communication with the PC 20, and performs communication with the PC 20 via a connected cable under the control of the CPU 102.

The operation unit 106 has a plurality of keys for inputting numeric keys, operation instructions, etc. (not shown). When the user of the mobile phone 10 operates the operation unit 106, a signal indicating the operation content is output from the operation unit 106 to the CPU 102 in accordance with the user operation.
The display unit 107 includes, for example, a liquid crystal display panel (not shown) and a control circuit that performs display control of the liquid crystal display panel. Under the control of the CPU 102, a character and graphic screen, and a menu for operating the mobile phone 10 are displayed. Display the screen on the LCD.
The storage unit 105 is a storage unit that stores data for controlling the mobile phone 10 and the telephone number of the other party with whom the user of the mobile phone 10 makes a call.

  Various programs executed by the CPU 102 are stored in a ROM (Read Only Memory) 103. An initialization program for initializing the IPL (Initial Program Loader), the CPU 102 and each part of the mobile phone, and the mobile phone 10 as a whole. An OS (Operating System) program to be controlled, a program for realizing a data communication function, a voice communication function, and the like are stored. A RAM (Random Access Memory) 104 is used as a work area when the CPU 102 executes a program, and stores data used when the CPU 102 executes the program.

  The CPU 102 controls each part of the mobile phone 10. When the mobile phone 10 is turned on (not shown), the CPU 102 reads the IPL from the ROM 103 and executes it. When the IPL is executed, the CPU 102 reads out and executes an initialization program from the ROM, and initializes the CPU 102 and each part of the mobile phone 10. When the CPU 102 finishes executing the initialization program, the CPU 102 reads out and executes the OS program and various programs from the ROM 508. When the CPU 102 executes the OS program, various functions as a mobile phone are realized, and the mobile phone 10 can perform voice communication and data communication.

(Configuration of the monitoring server device 40)
FIG. 4 is a block diagram illustrating a hardware configuration of the monitoring server device 40. As shown in the figure, each part of the monitoring server device 40 is connected to a bus 401, and various data are exchanged via this bus 401.

The operation unit 406 includes devices for operating the monitoring server device 40 such as a keyboard and a mouse. When these devices are operated by the operator of the monitoring server device 40, the CPU 402 performs various processes in accordance with the performed operations.
The display unit 407 includes a liquid crystal display as a display device, and displays a menu screen for operating the monitoring server device 40, data included in the monitoring server device 40, and the like under the control of the CPU 402.
The communication unit 410 is connected to a communication line that configures the mobile communication network 30A, and functions as an interface when communicating with other devices via the communication line.

The storage unit 405 has a hard disk device as a storage device, and stores an OS program that realizes the function of the operating system in the monitoring server device 40.
In addition, the storage unit 405 stores an application program that realizes in the monitoring server device 40 a function of monitoring communication performed by the mobile phone 10, a function of transmitting a monitoring result to the company server device 50, and the like. The storage unit 405 stores a monitoring table.

The monitoring table is a table in which information related to the mobile phone 10 that performs remote access to the company server device 50 via the mobile communication network 30A is stored.
FIG. 5A is a diagram showing an example of the format of the monitoring table. The user name of the mobile phone 10A, the phone number assigned to the mobile phone 10A, and the company that is the connection destination of the remote access of the mobile phone 10A The IP (Internet Protocol) address of the server device 50, the telephone number that is the other party when changing the access range in the enterprise server device 50, the status of data communication performed by the mobile phone 10A, and the mobile phone 10A Stores voice communication status.
In the monitoring table of FIG. 5A, the telephone number “090” of the mobile phone 10A is associated with the name “Taro” of the user of the mobile phone 10A, that is, the person who can remotely access the corporate server device 50. -aaaa-aaaa "is stored.
In addition, “xxx.xxx.xxx.xxx” is stored as the IP (Internet Protocol) address of the corporate server device 50 that is the connection destination of remote access, and the other party to call when changing the access range in the corporate server device 50 The telephone number “090-bbbb-bbbb” of the mobile phone 10B is stored as the other party telephone number.
As the state of data communication performed by the mobile phone 10A, “connection” is stored when the communication destination of the data communication performed by the mobile phone 10A is the IP address “xxx.xxx.xxx.xxx”. If it is not this IP address, “not connected” is stored.
Further, as a state of voice communication performed by the mobile phone 10A, when the communication destination of the voice communication of the mobile phone 10A is the telephone number “090-bbbb-bbbb”, “connection” is stored, and this phone If it is not a number, “not connected” is stored.

  The ROM 403 stores the IPL. When the monitoring server device 40 is powered on, the CPU 402 reads the IPL from the ROM 403 and starts up. When the IPL is activated by the CPU 402, the OS program stored in the storage unit 405 is executed using the RAM 404 as a work area, and communication for controlling the storage unit 405 and communicating via the mobile communication network 30A or the Internet 30B is performed. Functions and other basic functions as a computer device are realized. Further, when the application program is executed by the CPU 402, the various functions described above are realized.

(Configuration of corporate server device 50)
FIG. 6 is a block diagram illustrating a hardware configuration of the company server device 50. As shown in the figure, each part of the corporate server device 50 is connected to a bus 501, and various data are exchanged via this bus 501.

The operation unit 506 includes devices for operating the corporate server device 50 such as a keyboard and a mouse. When these operators are operated by the operator of the company server device 50, the CPU 502 performs various processes in accordance with the performed operations.
The display unit 507 has a liquid crystal display as a display device, and displays a menu screen for operating the enterprise server device 50, data held by the enterprise server device 50, and the like under the control of the CPU 502.
The communication unit 510 is connected to the Internet 30B, and functions as an interface when communicating with other devices via the Internet 30B.

The storage unit 505 has a hard disk device as a storage device, and stores an OS program that realizes the function of the operating system in the enterprise server device 50. The storage unit 505 stores an application program that realizes a function of authenticating remote access from the PC 20 and a function of changing the authority of remote access from the PC 20 in response to a message transmitted from the monitoring server device 40. ing.
In addition, the storage unit 505 authenticates the login from the PC 20, and the name of the employee working in the company that owns the company server device 50 (name of the owner of the mobile phone 10A) and the user name and password used at the time of login Is remembered. The storage unit 505 stores data that the PC 20 can always access during remote access and data that can be accessed when the access range is changed.

(Operation of the embodiment)
Next, an operation example of this embodiment will be described. In the following description, first, the operation will be described on the assumption that the information shown in FIG. 5A is stored in the monitoring table of the monitoring server device 40.

  First, when an employee A working in a company that owns the company server device 50 performs remote access to the company server device 50, the employee A connects the mobile phone 10A owned by the employee A to the PC 20. Next, in order for the employee A to log in to the company server device 50 on the PC 20, the user name and password of the employee A are input as information used for login, and the input user name and password are transmitted to the company server device 50. An operation is performed. Then, the cellular phone 10A connected to the PC 20 starts data communication, and a connection is established between the PC 20 and the corporate server device 50 via the cellular phone 10A, the mobile communication network 30A, and the Internet 30B. Then, the user name and password input in the PC 20 are sent to the company server device 50 via the mobile communication network 30A and the Internet 30B.

  In the corporate server device 50, when the user name and password are received by the communication unit 510, an authentication operation is performed by the CPU 502 based on these information and the user name and password stored in the storage unit 505. If a pair that matches the pair of the sent user name and password is stored in the storage unit 505, the PC 20 is authenticated and communicates with the company server device 50 to store data in the company server device 50. In addition, data stored in the company server device 50 can be acquired. At this point in time when the user logs in, in the corporate server device 50, data that can be accessed by the PC 20 is limited.

  Here, in the subscriber database 35, as shown in FIG. 2 (b), “connection” is stored as the data communication status of the cellular phone 10A by obtaining information from the exchange relaying the data communication. In addition, the IP address “xxx.xxx.xxx.xxx” of the company server device 50 is stored as a connection destination of data communication. Further, the monitoring server device 40 is notified of the connection destination of this data communication and the telephone number of the mobile phone 10A that has established the connection.

  When such information is received by the communication unit 410 of the monitoring server device 40 (FIG. 7: Step SA1; YES), the CPU 402 searches for information in the monitoring table using the received telephone number as a key. When the same telephone number as the key telephone number is found in the telephone number field, the IP address stored in association with the key telephone number is read out. When the IP address received from the subscriber database 35 matches the IP address read from the monitoring table (step SA2; YES), the CPU 402 sets “connection” to the “data communication state” cell in the monitoring table. Store (step SA3). If the two do not match, “not connected” is stored in the “data communication state” cell of the monitoring table (step SA4).

  Next, when the employee A operates the mobile phone 10A, inputs the telephone number “090-bbbb-bbbb” of the mobile phone 10B, and performs an operation to start a call on the operation unit 106, the CPU 102 performs communication. The unit 108 is controlled to make a call. Since the mobile phone 10 according to the present embodiment has a multicall function, a data communication connection and a voice communication line can be simultaneously established.

  When a call is made at the mobile phone 10A, an incoming signal is transmitted from the mobile communication network 30A to the mobile phone 10B. When the mobile phone 10B receives the incoming signal, the CPU 102 of the mobile phone 10B controls the call unit 109 to generate a ringing tone. When the user of the mobile phone 10B performs an operation on the operation unit 106 in response to the ringing sound, the CPU 102 generates a call response signal. The generated call response signal is transmitted from the mobile phone 10B and received by the mobile communication network 30A.

  When the mobile communication network 30A receives the call response signal, the mobile communication network 30A transmits the received call response signal to the mobile phone 10A. When the mobile phone 10A receives the call response signal, the line is connected and voice communication can be performed between the mobile phone 10A and the mobile phone 10B.

  In the subscriber database 35, as shown in FIG. 2C, “connection” is stored as the voice communication state of the mobile phone 10A, and the telephone number “090” of the mobile phone 10B is connected as the voice communication connection destination. -bbbb-bbbb "is stored. In addition, the monitoring server device 40 is notified of the connection destination of this voice communication and the telephone number of the mobile phone 10A.

  When such information is received by communication unit 410 of monitoring server device 40 (step SA5; YES), CPU 402 searches for information in the monitoring table using the received telephone number of mobile phone 10A as a key. Then, when the same telephone number as the key telephone number is found in the telephone number field, the telephone number “090-bbbb-bbbb”, which is the call destination stored in association with the key telephone number, is read. When the telephone number “090-bbbb-bbbb” received from the subscriber database 35 as the voice communication connection destination matches the telephone number read from the monitoring table (step SA6; YES), the CPU 402 Is stored in the “voice communication state” cell (step SA7). If they do not match (step S6; NO), “not connected” is stored in the “data communication state” cell of the monitoring table (step SA8).

When both the information stored in the “data communication state” cell of the monitoring table and the information stored in the “voice communication state” cell of the monitoring table are “connected” (step SA11; YES). Corresponding to the message for notifying the enterprise server device 50 identified by the IP address stored in the monitoring table to widen the remote access access range and the telephone number used as a key when searching for the telephone number described above The name “Taro Taro” stored with the name is transmitted (step SA12).
When the message and the name are received by the company server device 50, the CPU 502 changes the access range in the remote access of the PC 20 for the PC 20 that has been authenticated with the user name specified by the received name. Then, the PC 20 has no restriction on the data that can be accessed, and the storage unit 505 can access all data stored for the PC that performs remote access.

  Next, when the employee A operates the mobile phone 10A and ends the voice communication, the voice communication line between the mobile phone 10A and the mobile phone 10B is disconnected. Here, in the subscriber database 35, “not connected” is stored as the voice communication state of the mobile phone 10A, and the state shown in FIG. 2B is obtained. The voice communication state and the telephone number of the mobile phone 10A are monitored. The server device 40 is notified.

  When these pieces of information are received by the communication unit 410 of the monitoring server device 40, the CPU 402 determines that the voice communication line has been disconnected (step SA9; YES), and uses the received telephone number as a key in the monitoring table. Search for information in the number field. When the same telephone number as the key telephone number is found, “not connected” is stored in the “voice communication state” cell associated with the telephone number keyed in the search (step SA10).

The CPU 402 starts from the state where both the information stored in the “data communication state” cell of the monitoring table and the information stored in the “voice communication state” cell are “connected”. When the information stored in the “voice communication state” cell becomes “not connected”, a message notifying the end of the voice communication to the enterprise server device 50 identified by the IP address stored in the monitoring table Then, the name “Taro XX” stored in association with the telephone number used as the key in the above-described search is transmitted.
When this message and name are received by the company server device 50, the CPU 502 has logged in the access range of the PC 20 for remote access from the PC 20 that has been authenticated with the user name specified by the received name. Return to the time. Then, the data that can be accessed by the PC 20 is limited, and it becomes impossible to access all data stored in the storage unit 505 for the PC that performs remote access, and only some data can be accessed.

  As described above, in this embodiment, when remote access is made to the corporate server device 50, it is necessary to establish a voice communication line using the multicall function in order to change the access range. Since it is necessary to use a different communication line, it becomes difficult to access data by impersonation. Further, since the access range can be changed without the administrator operating the company server device 50 to change the access range, the administrator's hand is not bothered.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, It can implement with another various form. For example, the above-described embodiment may be modified as follows to implement the present invention, or may be implemented in combination with each modification.

In the embodiment described above, the mobile phone 10A may perform data communication using an APN (Access Point Name).
Specifically, the mobile phone 10A stores an APN that is a character string indicating a connection destination of data communication and a CID that is a number that uniquely identifies this APN in association with each other.
When the CID is designated by the user in the PC 20, and the designated CID is sent to the mobile phone 10A, the APN associated with the sent CID is sent from the mobile phone 10A to the mobile communication network 30A.
In the mobile communication network 30A, the APN is associated with the connection destination IP address indicated by the APN, and the connection destination IP address specified by the APN is specified based on the sent APN. The connection destination specified by the address is connected to the mobile phone 10A. Here, the connection destination specified by the APN is a device that enables communication between a device connected to the Internet 30B and the PC 20, and the PC 20 connected to the mobile phone 10A communicates with a device connected to the Internet 30B. It becomes possible.
Next, when an operation for connecting to the corporate server device 50 is performed on the PC 20, the PC 20 and the corporate server device 50 are connected, and an operation for logging in to the corporate server device 50 is performed and authentication is performed. Data stored in the device 50 can be accessed.

In the aspect of using the APN when performing data communication in this way, a field for storing the APN used when the mobile phone 10A communicates with the enterprise server device 50 in the monitoring table, and the APN are specified. A field for storing a connection state with a connection destination to be connected may be provided.
In this case, when the mobile phone 10A performs data communication using the APN, the APN used by the mobile phone 10A for data communication is sent to the monitoring server device 40. When the sent APN is the same as the APN stored in the monitoring table, the monitoring server device 40 sets the connection state with the connection destination specified by the APN to “connected”.
When the mobile phone 10A is connected to the corporate server device 50, the IP address of the corporate server device 50 that is the connection destination is sent to the monitoring server device 40, and this IP address and the “data communication connection destination” field If the IP address stored in the URL matches, the data communication state is set to “connected”.
When the connection state with the connection destination specified by the APN is stored in the monitoring table, the monitoring server device 40 selects the “connection state with the connection destination specified by the APN”, “data communication state”, and “voice”. When all of the “communication states” are “connected”, a message for notifying the company server device 50 to expand the remote access access range may be transmitted. In addition, when the “connection state with the connection destination specified by the APN” and the “voice communication state” are “connected”, a message for notifying the company server device 50 to widen the remote access access range is displayed. You may make it transmit.
In the embodiment described above, the connection destination of data communication is specified using the IP address, but a domain name may be used instead of the IP address.

  In the above-described embodiment, one telephone number is stored as the telephone number of the other party in the monitoring table. However, the stored telephone numbers may be a plurality of different telephone numbers. Then, if a call is made from the mobile phone 10A to any one of the plurality of telephone numbers and a voice communication line is connected, the access range in the enterprise server device 50 may be changed.

  In the above-described embodiment, the enterprise server device 50 may be connected to a telephone communication network so that a voice communication line can be established between the enterprise server device 50 and the mobile phone 10. According to this configuration, since the enterprise server device 50 receives a call from the mobile phone 10A, it is possible to establish a voice communication line without bothering the administrator at any time zone.

In the embodiment described above, the subscriber database 35 and the monitoring server device 40 are separate bodies, but may be integrated.
In the above-described embodiment, the Internet 30B may be a WAN (Wide Area Network).
Further, in the above-described embodiment, accessible data is limited when the PC 20 logs in, and when voice communication is performed, all data stored in the storage unit 505 for the PC that performs remote access. However, when voice communication is performed, it is not possible to access all data. May be.

10A, 10B ... mobile phone, 101 ... bus, 102 ... CPU, 103 ... ROM, 104 ... RAM, 105 ... non-volatile memory, 106 ... operation unit, 107- ··· Display unit 108 ··· Communication unit 109 ··· Calling unit 110 ··· Interface unit 20 · · · PC 30A · · · Mobile communication network 40 · · · Monitoring server device 401 ... Bus, 402 ... CPU, 403 ... ROM, 404 ... RAM, 405 ... Storage unit, 406 ... Operation unit, 407 ... Display unit, 410 ... Communication unit , 50 ... corporate server device, 501 ... bus, 502 ... CPU, 503 ... ROM, 504 ... RAM, 505 ... storage unit, 506 ... operation unit, 507. .Display unit, 510... Communication unit

Claims (3)

Stores the connection state of data communication with a predetermined data communication destination and the connection state of voice communication with a predetermined voice communication destination in a terminal capable of performing both data communication and voice communication simultaneously. State storage means for
When both the connection state of data communication stored in the state storage unit and the connection state of voice communication stored in the state storage unit indicate connection, a message for changing the access range is determined in advance. Message transmission means for transmitting to the server device;
A first server device comprising:
Data storage means for storing data accessible from the terminal;
Receiving means for receiving the message transmitted by the message transmitting means;
Access accepting means for accepting access from the terminal to the data stored in the data storage means;
A second server device comprising: an access range changing unit that changes an access range when the terminal accesses the data stored in the data storage unit according to the content of the message received by the receiving unit;
A communication system. The predetermined voice communication destination in the state storage means is the second server device,
The communication system according to claim 1, wherein the second server device establishes a voice communication line with the terminal. There are a plurality of predetermined voice communication destinations where the terminal performs voice communication,
The communication system according to claim 1, wherein the state storage unit stores connection states of voice communication for a plurality of voice communication destinations.

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