JP3113015U - Communication service provision system - Google Patents

Abstract

[PROBLEMS] To provide a communication environment using an optical line such as VDSL in addition to a communication environment using an analog line such as ADSL according to the needs of a tenant, and to meet such needs. Work such as construction required to provide
A relay for connecting a VDSL collective modem communication device 10 connected to an optical cable 5 and either the VDSL collective modem communication device 10 or a metal cable 4 for each individual line in a management room 2 of the collective housing. Device 14, a storage device that stores a contract related information table that can determine whether or not a contract with an optical communication service provider is made for each individual line, and a connection state of relay device 14 based on the contract related information And a server device for executing the writing of the contract related information table via the optical cable 5 on the optical communication service provider side.
[Selection] Figure 1

Description

  The present invention relates to a system for providing various communication services in an apartment house. In particular, in an apartment house, either an ADSL communication service using a metal cable or a VDSL communication service using an optical cable is used. In addition, the present invention relates to a communication service providing system that does not cause a failure such as a decrease in communication speed by realizing a connection state of a line according to the contract contents of a resident of each dwelling unit in the apartment house.

  In recent years, with the progress of high-speed modem communication technology, communication of several M or more, which has been impossible in the past, has become possible, and the Internet can be comfortably used.

  Recently, high speed services of several tens of meters or more have appeared in ADSL which has been widely spread. However, since the communication line between the station and the user's house is a communication line using a metal cable such as a copper wire, there is attenuation due to distance, line disconnection due to various noises, etc., to provide a stable and comfortable high-speed line It was not suitable.

  On the other hand, telephone companies such as NTT (registered trademark) are promoting the laying of optical cables (optical fiber cables) having a significantly large amount of information transmission instead of metal cables.

In order to cope with such circumstances, there has been proposed a construction method in which advanced piping for wiring an optical cable to each dwelling unit is carried out in an apartment house (Patent Document 1).
JP-A-9-217505 (summary, etc.)

  However, in the case of a new building, the above-described measures can be taken, but it may be difficult to perform the above-described construction on an existing apartment house. In addition, even if an optical cable can be wired to each dwelling unit according to the proposal of Patent Document 1, a resident does not necessarily have a contract with an optical communication company and may be wasted.

  In particular, among the services provided by various telecommunications carriers, there are many cases in which contracts are made for services such as ADSL using an analog line, so the above measures may be wasted.

  In light of this situation, the installation of a VDSL collective modem device in the management room of a collective housing, and the construction work for connecting to the VDSL communication service using optical cables for the entire building, is a waste of equipment. It is advantageous to eliminate

  However, even when the VDSL collective modem device is installed, the ADSL communication line and the VDSL communication line cannot be connected simultaneously. That is, when a metal cable for ADSL communication is connected to an individual line via a VDSL collective modem device, there arises a problem that a desired communication speed cannot be obtained due to a problem such as interference. For this reason, the work of switching from the ADSL communication line to the VDSL communication line must be carried out in each apartment house according to the resident's contract status, and there is a problem that a great deal of labor is required.

  Further, in the Internet connection service, a demand for changing from the ADSL service to the VDSL service is concentrated in a short time. For this reason, there also arises a problem that the construction as described above cannot be performed quickly.

  Therefore, the present invention can quickly provide a communication environment using an optical line such as VDSL in addition to an analog line such as ADSL according to a tenant's needs in an apartment house. The purpose is to reduce the work required to provide a communication environment that meets the needs.

The present invention made to achieve the above object is
(1) In the management room of the apartment house,
(1a) While pulling in an individual line connected to a communication device used by a resident of each dwelling unit,
(1b) Pull in both the metal cable and the optical cable laid by the carrier,
(1c) A communication service providing system in which each of the individual lines is connected to either the metal cable or the optical cable according to the contents of a contract between a resident and a communication carrier, and has the following configuration Is also adopted.
(2) The management room has a VDSL collective modem communication device connected to the optical cable.
(3) The management room is provided with a switching device for connecting the individual line to either the VDSL collective modem communication device or the metal cable for each line.
(4) Contract-related information storing optical communication service contract-related information for determining whether or not a contract with a telecommunications carrier providing a communication service using the optical cable is made for each individual line in the management room. An information storage device is provided.
(5) The management room is provided with a connection state control device for switching the connection state of each individual line by the switching device based on the optical communication service contract related information stored in the contract related information storage device. .
(6) Optical communication service contract related information for executing the writing of the optical communication service contract related information to the contract related information storage device via the optical cable to a communication provider providing the communication service using the optical cable. Provide a writing device.

  According to the communication service providing system of the present invention, the VDSL collective modem device is installed in the management room of the collective housing with the above-described configurations (1) to (6). It is possible to carry out wiring work to each dwelling unit every time a resident makes a contract for an optical communication service. In addition, a telecommunications carrier that provides an optical communication service uses the optical communication service contract related information writing device when a contract is established with a user who is a resident of the target apartment house. Predetermined information is transmitted via an optical cable to the contract related information storage device installed in the apartment house. Thereby, the writing of the contract related information in the contract related information storage device can be executed by remote operation. Then, the connection state control device installed at the apartment house reads the information stored in the contract related information storage device at a predetermined timing, and automatically switches the connection state for each individual line by the switching device. Thus, in the system of the present invention, the optical communication service can be quickly opened by remote control without requiring much labor.

  Here, the connection state control device can be used in combination with a control computer provided in the VDSL collective modem device. Of course, a dedicated control device may be installed. The contract-related information storage device can also use a memory (such as a hard disk) of a control computer provided in the VDSL collective modem device. By using the functions of these VDSL collective modem devices, it is possible to smoothly perform writing, updating, etc. of the optical communication service contract related information transmitted from the provider of the optical communication service.

  The connection of the individual line to such an optical communication service environment needs to be matched with the service start time by the contract between the user who uses the individual line and the optical communication service provider. As a method of matching this time, the writing time by the optical communication service contract related information writing device is set as the service start time, and the connection state control device always monitors the update status of the contents stored in the contract related information storage device. Alternatively, it may be programmed to execute a control process in which the switching state is switched by the switching device when the stored contents are updated. However, in such a control process, there is a complexity that it is necessary to control the writing timing of the optical communication service contract related information.

Therefore, the communication service providing system of the present invention may further include the following configuration.
(7) The contract related information storage device stores, for each individual line, information related to a service start time based on a contract with a communication carrier that provides a communication service using the optical cable.
(8) The connection state control device switches the switching time of the connection state of the switching device so that the individual line and the VDSL collective modem device are connected in accordance with the service start time. It is configured to execute the adjustment control process.

  By providing the above-described configurations (7) and (8), the provider providing the optical communication service stores the information including the service start time as the contract related information storage device of the housing complex where the corresponding user resides. Send it to and write it. By configuring in this way, the connection state control device searches the stored contents of the contract related information storage device at a predetermined timing, and from this search result, the individual line on which the contract of the optical communication service is established, and the service The start time is read out and stored in a memory or the like in a reserved form, and the connection state is switched by the switching device when the time comes. As a result, the communication environment can be quickly prepared at the service start time without complicated management.

Here, in the system of the present invention, not only the optical communication service environment but also the analog communication environment can be always provided. Therefore, it is preferable to further include the following configuration.
(9) The switching device is constituted by a relay.
(10) The connection state control device determines whether or not the optical cable has become incapable of communication due to a power failure or some other failure, and when it is determined that the communication has been disabled, the contract related information storage is performed. Regardless of the information related to the optical communication service contract written in the device, it is also configured to execute a failure countermeasure control process for switching the switching device to a state where each individual line and the metal cable are connected. .

  In this way, by switching the switching device to a relay and switching so that the analog line side and the individual line are connected in the event of a power failure, even if the communication service by the optical communication service environment cannot be received, the analog line The communication service by the line can be made ready. Therefore, it is possible to secure a telephone communication network when a failure occurs. Even if the speed is lower than that of optical communication, it is possible to use the Internet by the ADSL service, so that it is possible to eliminate an unexpected situation where the user cannot receive the communication service.

In addition, when the configurations (9) and (10) described above are employed, it is desirable to further include the following configurations.
(11) If the failure is resolved after the failure countermeasure control process is executed, the connection state control device provides a communication service using the optical cable based on the contents stored in the contract related information storage device. And a recovery control process for switching the switching device so that the individual line and the VDSL collective modem device are connected to each other. Being.

  By adopting the configuration (11) in this way, when the failure countermeasure control process is executed and the line is switched, the recovery control process is executed when the failure is resolved. As a result, after the failure recovery, the optical communication service according to the original contract state can be received. In addition, no effort is required for the construction.

Moreover, in the communication service providing system of the present invention described above, it is desirable to further include the following configuration.
(12) The connection state control device determines whether or not there is an individual line in which the contract with the communication carrier providing the communication service using the optical cable has been canceled in the storage contents of the contract related information storage device, and the contract is canceled. The individual line thus configured is configured to execute contract termination control processing for switching control of the switching device so that the individual line and the metal cable are connected.

  By providing the configuration (12), when the resident changes, a separate work for providing a communication service environment according to the contract status of the new resident becomes unnecessary.

  According to the present invention, in an apartment house, in addition to a communication environment using an analog line such as ADSL, a communication environment using an optical line such as VDSL can be quickly provided according to the needs of the resident. Moreover, since the connection state required for providing the communication environment according to these needs can be switched by remote operation, it is possible to provide a quick service and the effect of not requiring labor for that is exhibited. .

  Moreover, in addition to the effects as described above, there is no problem such as a decrease in communication speed for ADSL users, and a comfortable communication environment according to individual demands is provided for residents of apartment houses. Can do.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings.

[Description of system configuration]
A configuration of a communication service providing system including a VDSL modem apparatus with a built-in line switching function according to an embodiment of the present invention is shown in FIGS. The present embodiment can provide a high-speed Internet connection environment.

  As shown in FIG. 1 to FIG. 3, the communication service providing system 1 as an embodiment includes individual lines 3 a to 3 c connected to communication devices used by residents of each dwelling unit in a management room 2 of an apartment house. At the same time, both the metal cable 4 laid by the telephone company and the optical cable 5 laid by the optical communication service provider are drawn in, and depending on the contents of the contract between the resident and the communication provider, each individual line 3a, etc. It is designed to be connected to either the metal cable 4 or the optical cable 5 and has the following characteristics.

  First, in the management room 2, a VDSL collective modem communication device 10 connected to the optical cable 5 and a terminal board 20 are installed. The metal cable 4 is drawn into the VDSL collective modem device 10 via the terminal board 20. Individual lines 3a and the like from each dwelling unit are also drawn into the VDSL collective modem device via the terminal board 20. The terminal board 20 is the same as the terminal board 20 conventionally used for branching a telephone line to each dwelling unit.

  The VDSL collective modem device 10 includes a VDSL collective modem 11, an optical / electrical converter 12, a control computer 13, and a relay device 14 that are the main body of the VDSL collective modem device 10. The VDSL collective modem device 1 is configured such that control signals input via the optical cable 5 and the optical / electrical converter 12 are input to the control computer 13 and data such as Internet information is input to the VDSL collective modem 11. Has been. The VDSL collective modem 11 converts the input data into an analog signal. The relay device 14 has a number of relay contacts 14a corresponding to the number of dwelling units in an apartment house equipped with the system of the present embodiment.

  As shown in FIG. 1, a VDSL modem 31 is installed in the dwelling unit of user A who receives the VDSL service provided by the optical communication service provider. The telephone set 32 and personal computer (personal computer) 33 used by the user A are connected to the VDSL modem 31.

  On the other hand, as shown in FIG. 2, an ADSL modem 35 is installed in the dwelling unit of the user B who receives the ADSL service via the analog line. The telephone set 36 and the personal computer 37 used by the user B are connected to the ADSL modem 35.

  Further, as shown in FIG. 3, only the telephone 39 is installed in the dwelling unit of the user C who uses only the telephone.

  First, a connection state for the user A will be described. For user A, as shown in FIG. 1, the metal cable 4 from the office is connected to the VDSL collective modem 11, and the individual line 3 a from the user A's dwelling unit is also connected to the VDSL collective modem 11. Similarly, the relay contact 14a of the relay device 14 is switched to ON. As a result, data such as the Internet received via the optical cable 5 is converted into an analog signal by the VDSL collective modem 11 in the management room 2, and is transmitted to the user A's home via the relay device 14 and the terminal board 20. Input to the VDSL modem 31. As a result, the user A can use the personal computer 33 for using the Internet in the VDSL environment. As for the telephone line, the signal reaching the terminal board 20 by the metal cable 4 is input to the individual line 3a of the user A after passing through the relay device 14 and the VDSL collective modem 11. The signal output from the telephone 32 of the user A is transmitted in the order of individual line 3a → terminal board 20 → relay device 14 → VDSL collective modem 11 → relay device 14 → terminal board 20 → metal cable 4.

  Next, the connection state for the user B will be described. For user B, as shown in FIG. 2, by turning OFF relay contact 14b of relay device 14, metal cable 4 and individual line 3b of user B can be connected without going through VDSL collective modem 11. Connecting. As a result, data such as the Internet and telephone communication signals received by the ADSL service using the analog line are not transmitted via the VDSL collective modem 11 but only via the relay device 14 and the terminal board 20 to the user B. To the ADSL modem 35 in the home. Thereby, the user B can use the Internet in an ADSL environment. Further, since the VDSL collective modem 11 is not used, problems such as a decrease in communication speed when using the Internet do not occur.

  In addition, a connection state for the user C will be described. For user C, as shown in FIG. 3, by turning OFF relay contact 14c of relay device 14, metal cable 4 and individual line 3c of user C can be connected without going through VDSL collective modem 11. Connecting. Thereby, the user C can use the telephone set 39 as usual.

  In the present embodiment, ON / OFF switching of the relay contact 14a and the like of the relay device 14 as described above is automatically controlled by the control computer 13 provided in the VDSL collective modem device 10. Below, the structure etc. which this embodiment employ | adopts about this point are demonstrated based on FIGS.

  As shown in FIG. 4, the control computer 13 includes a microcomputer 41 having a CPU, ROM, RAM, and the like, and includes a storage device 42 for storing management data in a rewritable manner. Further, the control computer 13 is configured to be able to input / output signals to / from the VDSL collective modem 11, the optical / electrical converter 12 and the relay device 14 via the input / output port 43.

  Next, data written to the storage device 42 of the control computer 13 in order to execute the control process of the present embodiment will be described. As shown in FIG. 5, this data is stored in the storage device 42 as a contract related information table 43 for storing a user ID, a telephone number, a VDSL service start date, and a switching completion flag for each individual line 3a. ing.

  Next, equipment on the optical communication service provider side in the present embodiment will be described. As shown in FIG. 6, a server device 51 is provided on the optical communication provider side. The server device 51 is configured by a computer system. The server device 51 includes a storage device 52 for storing management information. As shown in FIG. 7, the storage device 52 stores a user information table 53 as management information. In the user information table 53, management information such as an ID, an address, a telephone number, a switching device ID, and a VDSL service start date for each user is written. Here, the switching device ID is an ID assigned to each VDSL collective modem device 10. In the present embodiment, one ID (for example, T00000001) is assigned to the VDSL collective modem apparatus 10 of the collective housing having the system configuration described above.

  Next, an overall flow of work in the communication service providing system of the present embodiment will be described with reference to FIG. As shown in the figure, in providing this service, the VDSL collective modem device 10 is installed in an apartment house such as an apartment or an apartment (S10). Next, a subscription contract for the VDSL service is concluded with the user who lives in the housing complex where the VDSL collective modem device 10 is installed (S20). Then, a user ID is given to a user who has decided to subscribe to the VDSL service (S30), a service start date is determined (S40), and input to the user information table 53 is executed (S50).

  The server device 51 periodically executes the control process shown in FIG. 9 in order to start the VDSL service for the subscriber. This control process is periodically executed to read newly input data in the user information table 53 (S110). Subsequently, based on the switching device ID of the read information, the VDSL collective modem device 10 as the data transmission destination is specified (S120). Then, the corresponding data in the newly input data is transmitted to the VDSL collective modem apparatus 10 specified in S120 (S130). Here, the data to be transmitted is a user ID, a telephone number, and a service start date. Then, it is determined whether or not the data is correctly received on the VDSL collective modem apparatus 10 side (S140). If the data is not correctly received (S140: NO), transmission is executed again (S130). Whether the data has been correctly received can be determined by a response signal from the control computer 13 of the VDSL collective modem apparatus 10 that has received the data. If the data has been received correctly (S140: YES), the VDSL collective modem apparatus 10 In step S150, data indicating normal termination is transmitted. The above processing is repeated until transmission is completed for all the data read in S120 (S160).

  Next, a control process executed by the control computer 13 of the VDSL collective modem apparatus 10 installed in the apartment house will be described. As shown in FIG. 10, when receiving data from the server device 51 (S210), the control computer 13 primarily stores the received data in the memory (S220), and stores the stored data in the server device 51. A reply is made (S230). Then, when data indicating normal termination is received from the server device 51 (S240), the data that is temporarily stored in the memory is written in the contract related information table 43 (S250).

  The control computer 13 of the VDSL collective modem apparatus 10 is further configured to execute the control processing shown in FIG. The control computer 13 periodically executes the control process shown in FIG. When this process is started, first, the contract related information table 43 is referred to (S310). Then, data in which “1” indicating completion is not recorded in the switching completion flag is read (S320). Next, the service start date in the data is compared with the current date, and the telephone number of the data whose current date has reached the service start date is specified (S330). Next, an individual line corresponding to the telephone number is specified from the telephone number (S340), and a relay contact to which the individual line is connected is turned on (S350). For this data, “1” is entered in the column of the switching completion flag (S360). Thereby, the VDSL environment can be provided to the user who has subscribed to the VDSL service on the service start date.

  In the present embodiment, the control computer 13 further executes the following control process. This process is a control process for turning off the relay contact of the relay device 14 when a failure such as a power failure occurs, and is always executed. As shown in FIG. 12, it is determined whether or not a failure such as a power failure has occurred (S410). If it is determined that a failure such as a power failure has occurred (S410: YES), all relays of the relay device 14 The contacts are controlled to be turned off (S420), and all of the switching completion flag fields in the contract related information table 43 are rewritten to “0” (S430). As a result, even when the Internet access by the VDSL service becomes impossible due to a failure such as a power failure, the Internet access via the analog line can be made possible. In addition, since the switching completion flag is reset in the control process when the failure occurs, the VDSL environment is automatically restored to the VDSL service subscriber when the relay control process described above is executed after the failure is resolved. can do.

  The server device 51 executes the following control process when the user information is updated by withdrawal or transfer. In this control process, as shown in FIG. 13, the data updated in the user information table 53 is read (S510), and it is determined whether the reason for the update is withdrawal or transfer (S520). This determination can be easily made by changing the data in the user information table to data with a date that cannot be reached such as “999.

  In the case of renewal due to withdrawal (S530: withdrawal), the VDSL aggregate modem apparatus 10 serving as the data transmission destination is specified based on the information switching apparatus ID read in S510 (S530), and the VDSL aggregate modem apparatus 10 is identified. Then, only the user ID of the corresponding data among the updated data is transmitted (S540), and it is determined whether the data is correctly received based on the response from the VDSL aggregate modem apparatus 10 (S550), If not received correctly (S550: NO), the transmission is executed again (S540). If the data is correctly received, data for instructing deletion of data is transmitted to the VDSL aggregate modem apparatus 10 (S560).

  On the other hand, in the case of update by relocation (S520: relocation), the new / old switching device ID of the information read in S510 is compared, and the VDSL collective modem device 10 of the old ID before relocation and the new ID after relocation are compared. The VDSL collective modem device 10 is specified (S535). Then, the control processing similar to the processing from S540 is executed on the VDSL aggregate modem device 10 of the old ID (S545, S555). Subsequently, the control process similar to the control process after S130 of the control process at the time of new input described above is executed on the VDSL collective modem apparatus 10 of the new ID after the transfer (S630, S640, S650).

  The control computer 13 of the VDSL collective modem device 10 executes the following processing when receiving the above-described deletion instruction accompanying withdrawal or transfer. As shown in FIG. 14, the individual line corresponding to the user ID that has received the delete command is specified (S710), the relay contact to which the individual line is connected is turned off (S720), and the user ID is Data is deleted from the contract related information table 43 (S730). Note that the VDSL collective modem device with the new ID that has received the data with the transfer in the above process has received the user ID, telephone number, service start date, and normal end, so the control process of FIG. 10 is executed. Furthermore, by executing the control process of FIG. 11, the VDSL environment can be provided on the start date at the relocation destination.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be implemented in various modes without departing from the gist of the invention.

1 is a configuration diagram illustrating an entire system of an embodiment. 1 is a configuration diagram illustrating an entire system of an embodiment. 1 is a configuration diagram illustrating an entire system of an embodiment. It is a block diagram of the computer for control in embodiment. It is explanatory drawing of the data in the contract relevant information table memorize | stored in the VDSL collective modem apparatus in embodiment. It is a block diagram of the server apparatus in embodiment. It is explanatory drawing of the data in the user information table memorize | stored in the server apparatus in embodiment. It is a flowchart of the preparation work in embodiment. It is a flowchart of the control process at the time of new input which a server apparatus performs in embodiment. It is a flowchart of the contract relevant information writing process which the computer for control performs in embodiment. It is a flowchart of the service start process which the computer for control performs in embodiment. It is a flowchart of the process at the time of the failure occurrence which the computer for control performs in embodiment. It is a flowchart of the update process which a server apparatus performs in embodiment. It is a flowchart of the withdrawal process which the computer for control performs in embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Communication service provision system 2 ... Management room 3a-3c Individual line 4 ... Metal cable 5 ... Optical cable 10 ... VDSL collective modem communication apparatus 11 ... VDSL collective modem 12 ... Optical / electrical converter 13 ... Control computer 14 ... Relay device 14a-14c ... Relay contact 20 ... Terminal board 31 ... VDSL modem 32 ... Telephone 33 ... Personal computer 35 ..ADSL modem 36 ... Telephone 37 ... Personal computer 39 ... Telephone 41 ... Microcomputer 42 ... Storage device 43 ... Contract related information table 51 ... Server device 52 ... Storage Device 53 ... User information table

Claims (5)

(1) In the management room of the apartment house,
(1a) While pulling in an individual line connected to a communication device used by a resident of each dwelling unit,
(1b) Pull in both the metal cable and the optical cable laid by the carrier,
(1c) A communication service providing system in which each of the individual lines is connected to either the metal cable or the optical cable according to the contents of a contract between a resident and a communication carrier, and has the following configuration Communication service providing system characterized by adopting
(2) The management room has a VDSL collective modem communication device connected to the optical cable.
(3) The management room is provided with a switching device for connecting the individual line to either the VDSL collective modem communication device or the metal cable for each line.
(4) Contract for storing optical communication service contract related information for determining whether or not a contract with a communication provider providing communication service using the optical cable is made for each individual line in the management room A related information storage device is provided.
(5) The management room is provided with a connection state control device for switching the connection state of each individual line by the switching device based on the optical communication service contract related information stored in the contract related information storage device. .
(6) Optical communication service contract related information for executing the writing of the optical communication service contract related information to the contract related information storage device via the optical cable to a communication provider providing the communication service using the optical cable. Provide a writing device. The communication service providing system according to claim 1, further comprising the following configuration.
(7) The contract related information storage device stores, for each individual line, information related to a service start time based on a contract with a communication carrier that provides a communication service using the optical cable.
(8) The connection state control device switches the switching time of the connection state of the switching device so that the individual line and the VDSL collective modem device are connected in accordance with the service start time. It is configured to execute the adjustment control process. The communication service providing system according to claim 1, further comprising the following configuration.
(9) The switching device is constituted by a relay.
(10) The connection state control device determines whether or not the optical cable has become incapable of communication due to a power failure or some other failure, and when it is determined that the communication has been disabled, the contract related information storage is performed. Regardless of the information related to the optical communication service contract written in the device, it is also configured to execute a failure countermeasure control process for switching the switching device to a state where each individual line and the metal cable are connected. . The communication service providing system according to claim 3, further comprising the following configuration.
(11) If the failure is resolved after the failure countermeasure control process is executed, the connection state control device provides a communication service using the optical cable based on the contents stored in the contract related information storage device. And a recovery control process for switching the switching device so that the individual line and the VDSL collective modem device are connected to each other. Being. The communication service providing system according to any one of claims 1 to 4, further comprising the following configuration.
(12) The connection state control device determines whether or not there is an individual line in which the contract with the communication carrier providing the communication service using the optical cable has been canceled in the storage contents of the contract related information storage device, and the contract is canceled. The individual line thus configured is configured to execute contract termination control processing for switching control of the switching device so that the individual line and the metal cable are connected.

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