JP4679326B2 - Communication system and communication method - Google Patents

Description

The present invention relates to a communication system and a communication method corresponding to a communication addressed to a user of a communication terminal such as a fixed telephone or a personal computer, and more particularly to the communication method addressed to the user. The present invention relates to a communication system and a communication method for notifying a fact.

  If a call is made to a fixed telephone installed in a home or office in the absence of a user, it cannot be answered directly. If an answering machine is installed in such a case, the message of the person who made the call can be recorded. The recorded content can be heard by the user calling from outside. However, in the answering machine, if the person who made the call does not leave a message, the telephone number of the person cannot be known and cannot be redone.

  There is a number display service as a service for displaying the telephone number of the other party who has made a call on the display unit of the telephone. In the case of subscribing to the number display service, even if a person who makes a call does not leave a message, the telephone number is recorded in the telephone as an incoming call history. Therefore, when the user returns from the outside to the place where the fixed telephone is placed, the user can confirm the telephone number that has been called and make a return call.

  However, if the user is away from home, the fact of the incoming call cannot be confirmed for the other party who has not left a message on the telephone. Therefore, there is a problem that a user cannot take a timely response from the outside of a person who has made a call due to an urgent requirement but did not leave a message for some reason. Therefore, when the user does not return to the place where the fixed telephone is installed for a long time, such as going out for a long time, there is a possibility that a great inconvenience may occur for the user.

  Incidentally, a first proposal has been made to send an e-mail to a destination registered in advance when a call is made (for example, see Patent Document 1). In the first proposal, when a user calls a specific destination such as a police station or a fire station designated in advance, the registered message is transmitted to the registered e-mail destination. It has become. For example, suppose you call “110” (police station) with a telephone. In this first proposal, if you have registered in advance a specific partner, such as a relative, that you would like to contact other than the police station, when you make an emergency call to the police station, you will be sent an email to that effect. Done.

  In the first proposal, automatic transmission of an e-mail is performed to other necessary destinations triggered by the caller of the caller. Therefore, it is impossible to cope with the problem that occurs when a telephone call is made to the telephone set when the user goes out.

Therefore, a second proposal has been made in which information on the caller is notified to the called party by e-mail so that the call occurrence status can be confirmed at a remote location (see, for example, Patent Document 2). ). In this second proposal, caller information is detected when a call is generated, and information about the caller who has made the call is sent to the called party using e-mail, that is, the user of the fixed telephone in the above example. Dial-up to the e-mail address. According to the second proposal, even when the user of the fixed telephone is out, the information about the caller can be received by e-mail when a call is generated.
JP 2004-363711 A (paragraphs 0027 to 0029, FIG. 2) JP 2001-203785 (No. 0009, paragraph 0040, FIG. 1)

  The second proposal is a technique related to a multi-function telephone on the premise of using a facsimile modem. For this reason, when sending an e-mail, it is necessary to dial up to connect to a predetermined access point. Therefore, according to the second proposal, charging is performed every time dial-up is performed. For this reason, particularly when there is a possibility that a large number of telephone calls may be made, it is not economical unless the interval between notifications by e-mail is increased to some extent. However, if the notification interval is lengthened, it becomes impossible to respond quickly to urgent requirements.

  In addition, the above explanation was a problem when a telephone call was made to the telephone, but for example, when it is not possible to receive e-mail with a personal computer at home or office due to going out, there is a problem with the absent telephone. A similar problem occurred.

Accordingly, an object of the present invention is to provide a communication system capable of notifying the user of information for accessing the other party by e-mail when communication is made to this user in a state where the user of the communication terminal cannot respond. And providing a communication method .

In the present invention, (b) a mail server, (b) a communication terminal that receives an e-mail from this mail server, (c) an e-mail address used when the communication terminal receives the e-mail, and an e-mail of this address Address registration means registered with a transfer address prepared for e-mail transfer when no mail is received, and (d) a power source for detecting a state in which the communication terminal is turned off. Off detection means; and (e) the communication described above by accessing the mail server at a predetermined time interval when the power supply off detection means detects that the communication terminal is turned off. this e-mail Accession transfer address corresponding refers to the address registration means described above in the case where the terminal is the e-mail address to be used when receiving present It is provided an electronic mail access information transfer means for transferring the scan information to the communication system.

In the present invention, (b) an off-state detecting step of detecting when a communication terminal that receives an e-mail from a predetermined mail server is turned off, and (b) the off-state detecting step When it is detected that the power of the communication terminal is turned off, the mail server described above is accessed at a predetermined time interval, and the communication terminal sends an electronic mail addressed to the e-mail address used for reception. A mail server access step for determining whether the mail has arrived, and (c) in the mail server access step, it is determined that the e-mail has arrived at the e-mail address used for reception by the communication terminal described above. when in, the email forwarding address prepared for e-mail forwarded for when an e-mail for this address is not received The access information is provided to the electronic mail access information transfer step and a communication method for transferring.

As described above, according to the present invention, even when the user is out, for example, a mail address dedicated to a communication terminal such as his mobile phone is used as a notification destination, and the transfer function is enabled. If so, you can be notified when an email arrives.

  Hereinafter, the present invention will be described in detail with reference to examples.

  FIG. 1 shows an outline of a communication system in an embodiment of the present invention. The communication system 100 includes a station 101 that performs telephone exchange processing, and a user house 103 connected to the station 101 via a telephone line 102. The office building 101 is connected to the Internet 106 via a broadband access server (BAS) 105 in addition to being connected to the telephone network 104. Here, the broadband access server 105 may be connected to other networks such as CATV (CAble TeleVision) in addition to the Internet 106. For example, a mail server 107 that receives electronic mail is connected to the Internet 106.

  The user house 103 includes a user house side splitter 111 for separating the telephone line 102 and the ADSL (Asymmetric Digital Subscriber Line) line in respective target frequency bands and mixing signals, and an ADSL connected thereto. A router 112 exists. Connected to the ADSL router 112 are a personal computer 113 for data communication with the Internet 106 and a telephone 114 as a fixed telephone connected to the telephone network 104 for making a call with a partner (not shown). The station 101 is connected to a telephone line 102, and a station-side splitter 116 that bridges and mixes ADSL signals and telephone voice signals, and a DSLAM (DSL (Digital Subscriber Line) line concentrator connected thereto. ) 117 and telephone exchange 118 are accommodated. The DSLAM 117 is connected to the broadband access server 105 described above, and the telephone switch 118 is connected to the telephone network 104.

  In such a communication system 100, a telephone voice signal transmitted from the telephone 114 is transmitted to the telephone line 102 via the ADSL router 112 and the user premises side splitter 111, separated by the office building side splitter 116, and up to the telephone exchange 118. From here, it is sent to the telephone network 104 and the telephone service by voice with the other party is performed. When the personal computer 113 accesses a desired site on the Internet 106, the user-side splitter 111 separates and extracts the ADSL signal mixed with the telephone voice signal by the station-side splitter 116 side. Send to server 105 side. As a result, the Internet 106 can be accessed using the broadband access server 105.

  By the way, in the communication system 100 of the present embodiment, the ADSL router 112 has a unique configuration, so that there is a call even when the user (subscriber) of the telephone set 114 as a fixed telephone is not in the user home 103. Can be determined.

  FIG. 2 shows the configuration of the ADSL router of this embodiment together with peripheral circuit configurations. The ADSL router 112 converts the audio signal of the LAN (local area network) control unit 121 and the telephone 114 connected to the personal computer 113 using Ethernet (registered trademark) into IP (Internet Protocol) data and vice versa. An IP / voice control unit 122 is provided. The LAN control unit 121 and the IP / voice control unit 122 are connected to an IP routing processing unit 123 that performs data routing processing. The IP routing processing unit 123 is connected to a WAN control unit 124 that encapsulates a packet in a WAN (Wide Area Network) side frame configuration as a broadband network system, and vice versa. The WAN control unit 124 is connected to the user home-side splitter 111 via an ADSL transmission / reception unit 125 that converts a digital signal into an analog signal and vice versa. However, the telephone voice signal is directly transmitted between the user home side splitter 111 and the WAN control unit 124 and between the user home side splitter 111 and the telephone 114. The IP routing processing unit 123 is connected to the e-mail address registration unit 126 for registering an e-mail address for transferring an e-mail when a call is made, and the telephone reception history storage unit 127 for storing the reception history of the telephone 114. Has been. In addition, a telephone number detection unit 128 for detecting a telephone number in the general telephone network is connected between the user home side splitter 111 and the mail address registration unit 126.

  The ADSL router 112 shown in FIG. 2 includes a CPU (Central Processing Unit) (not shown) and a ROM (Read Only) for storing a control program executed by the CPU in order to realize at least a part of these units as software. A storage medium such as a memory) and a memory such as a RAM (random access memory) that temporarily stores various data required when the CPU executes the control program. The mail address registration unit 126 and the telephone reception history storage unit 127 are configured by a partial area of this memory. The ADSL router 112 is also provided with a display unit 129 made of a liquid crystal display or an organic EL display (organic electroluminescence display) and an operation unit 130 on which keys (not shown) for performing various operations are arranged.

  The ADSL router 112 having such a configuration is configured to notify the incoming call history of the telephone to the mail address registered in the mail address registration unit 126 by mail. Thus, the user of the telephone 114 can easily check the incoming call history of the telephone 114 by receiving an e-mail using the Internet 106 (FIG. 1) while away from home. Here, the incoming call history of the telephone 114 is stored in a storage area (not shown) in the ADSL router 112 regardless of whether the user responds to the incoming call.

  FIG. 3 shows signal processing until a call signal is sent from the telephone exchange when a telephone call is made to the telephone shown in FIG. This will be described with reference to FIG. When a telephone call is made from a telephone (not shown) of the telephone network 104 to the telephone 114 of the user's home 103, the power supply polarities L1 and L2 for the subscriber line are reversed (step S201), and the information receiving terminal activation signal (CAR) is transmitted from the telephone exchange 118. ) Is sent (step S202). In response to this, the telephone 114 returns a primary response signal (step S203). Then, information such as called number information is sent from the telephone exchange 118 (step S204), and the telephone set 114 returns a reception completion signal (step S205). After the above processing is performed, the telephone exchange 118 starts sending a calling signal to the telephone 114 (step S206).

  In this way, when a call is made to the telephone 114, the called party number information is sent from the other party's telephone before the calling signal rings. The telephone numbers of these calling telephones are detected as incoming telephone numbers by the telephone number detection unit 128 shown in FIG. 2, and are stored in the telephone reception history storage unit 127 together with their incoming times. As for IP telephones that make voice calls using VoIP (Voice over IP) technology that transmits voice information over an IP (Internet Protocol) network, these are also related to the calling telephone before the telephone 114 rings for a call. Is detected by the IP routing processing unit 123 and stored in the telephone reception history storage unit 127. In the present embodiment, information about whether or not the telephone 114 that has received an incoming call responds to the calling signal is also stored in the telephone reception history storage unit 127.

  By the way, in the communication system 100 of the present embodiment, since the telephone 114 is a fixed type, it is assumed that a plurality of persons such as family members share it, and a reception history is allocated and notified for each user. In this relationship, each user needs to make a predetermined setting in the ADSL router 112 or change those settings in order to notify the reception history.

  FIG. 4 shows the setting / changing process for each user for this purpose. This processing is executed by the CPU according to a control program stored in the ADSL router 112, as in other processing described later. That is, when the user operates the operation unit 130 (FIG. 2) to set the ADSL router 112 to the user setting / change mode, a list of users is displayed on the display unit 129 (FIG. 2) (step S221). When the operator selects a user who performs processing such as setting from the displayed contents (step S222: Y), authentication for checking whether the operator is the same person as the selected user. Processing is performed (step S223). When a new user is registered or a user is deleted, the operator performs the designation (step S222: N, step S224: Y), and the corresponding process is executed (step S225). ).

  By the way, if the user is authenticated in step S223, a menu screen for the process performed by the user is displayed on the display unit 129 (step S226). When modifying the current setting contents, the user selects an item to that effect (step S227: Y). Then, information about the user is extracted from the mail address registration unit 126 shown in FIG. 1 and displayed as a list on the display unit 129 (step S228).

  FIG. 5 shows a part of the mail address registration unit. The mail address registration unit 126 is divided into areas for each of the users “A”, “B”,..., And a telephone number desired to be transferred is registered when an incoming call is received for each of the users. . Further, for each user, a mail address of a transfer destination, a transfer interval of a reception history for those mail addresses, and whether transfer is possible are set. For example, with respect to the user “B”, two telephone numbers “090-4567-8910” and “090-1112-1314” are telephone numbers of his / her friends and the like, and there is a possibility that a call will be made when going out. is there. Therefore, these phone numbers are registered.

  Further, the user “B” has a management authority for reception of the telephone 114, and under the authority, a setting of “other all” can be performed. Here, “other all” receives notification of reception history for all calls made to other users. For example, if your husband is doing business and your husband and wife are out, the wife calls the husband and takes a temporary response, or monitors the phone number of the employee who is on duty. It can be used for such applications. The forwarding mail address can be set to a different address so as to cope with the reception histories having different personalities. The “transfer interval” is a time interval for transferring the reception history of the corresponding telephone number by e-mail, and “transfer availability” is a setting for whether or not to transfer by e-mail. More specifically, the mode of transfer can be determined. For example, it is possible to set such that transfer of the reception history is not required at night or on holidays. In addition, a selection item “as needed” may be provided in the “transfer interval”, and the reception history may be transferred each time a call is made. As a result, it is possible to quickly respond to urgent requirements.

  Returning to FIG. 4, the description will be continued. When a list of corresponding user locations registered in the mail address registration unit 126 shown in FIG. 5 is displayed in step S228, the user designates a location to be corrected (step S229: Y), and the item Correction is performed (step S230). Thereafter, if the user instructs the end of the process (step S231: Y), the setting / changing process ends (end). When an instruction to continue another process is given from the operation unit 130 (step S231: N), the process returns to step S226.

  FIG. 6 shows an outline of the incoming call processing of the telephone. When a telephone call is made to the telephone 114 shown in FIG. 2 and the called number information shown in step S204 (FIG. 3) is sent (step S251: Y), the ADSL router 112 stores the telephone reception history storage unit. In 127, the telephone number of the calling side and the current incoming time are stored as a pair (step S252). Then, it is monitored whether or not there is a response from the telephone 114 to the telephone call (step S253, step S254). When the user takes a handset (not shown) of the telephone 114 and answers the call (step S253: Y), the telephone number / incoming time pair data stored in step S252 is deleted from the telephone reception history storage unit 127 ( Step S255). This is based on the premise that a message can be taken even if the person who answers the call is not the party the caller is trying to talk to. Therefore, in an environment where such measures cannot be expected, the process of step S255 can be omitted depending on the user's pre-setting.

  On the other hand, the ringing tone is cut off before answering, or the caller hangs up with an announcement such as "I can't answer the phone right now" after a predetermined waiting time. In such a case (step S254: Y), a search process is performed to determine whether the telephone number acquired in step S252 exists in the mail address registration unit 126 (step S256). If the corresponding telephone number is registered (step S257: Y), the stored contents are distributed to the corresponding users based on the registered contents of the mail address registration unit 126 as shown in FIG. Is corrected (step S258). At this time, even if there is no matching telephone number, if there is a user who has set the “other all” as described above, the identified telephone number is stored in the storage area of the user. If this is a telephone number registered by another user, it will be stored in the area of both the user and the user who has set “other all”. In step S252, the telephone number and the incoming time are temporarily stored in a working memory (not shown) of the ADSL router 112, and data is stored for each user in the telephone reception history storage unit 127 after the processing content is confirmed. Also good. If it is determined in step S257 that the telephone number is not the subject of notification by e-mail (N), the telephone number is deleted from the telephone reception history storage unit 127 (step S255).

  In this manner, the telephone reception history storage unit 127 sequentially stores data that needs to be notified of the reception history by e-mail. Such data can be appropriately deleted by the user to prevent memory overflow. In this embodiment, the data for which the transfer of the e-mail has been completed is deleted from the telephone reception history storage unit 127 to prevent the overflow as much as possible.

  FIG. 7 shows the state of the e-mail transfer process. When the e-mail transfer time arrives (step S271: Y), the CPU of the ADSL router 112 checks whether there is an untransmitted reception history that can be transferred in the telephone reception history storage unit 127 (step S272). ). If there is no corresponding item (N), the e-mail transfer process is immediately terminated (END).

  If the corresponding reception history exists (step S272: Y), the reception history of the corresponding user is transmitted to the e-mail destination designated by the user (step S273). When there are a plurality of corresponding users, an e-mail is transmitted to a destination designated by these users for each user. When the telephone number of the incoming call and the incoming time are transmitted to the corresponding user by e-mail, the data of these transmitted users are deleted from the corresponding locations in the telephone reception history storage unit 127, respectively. (Step S274).

  As described above, according to the present embodiment, a user as a user of the telephone 114 can send a reception history to a predetermined destination by e-mail even when he / she is in a place where the telephone 114 cannot respond, It is possible to know the telephone number of the calling party using a communication terminal capable of receiving electronic mail such as a computer or a cellular phone. Therefore, it is possible to take appropriate measures such as making a call to the other party. Further, in the present embodiment, not only incoming calls in the IP telephone network but also telephone numbers can be determined for incoming calls from the general telephone network by using the telephone number detection unit 128, and incoming call history information can be transferred.

  <First Modification of Invention>

  FIG. 8 shows the configuration of the ADSL router in the first modification of the present invention together with the peripheral circuit configuration. In the ADSL router 112A shown in FIG. 8, the same parts as those in FIG. 2 are denoted by the same reference numerals, and description thereof will be omitted as appropriate. In this first modification, an electronic mail received by the personal computer 113 via a communication network such as the Internet 106 shown in FIG. 1 is received by a desired communication terminal such as a mobile phone even when the user is not at the user's home 103. It is something that can be done.

  As is well known, e-mail is not sent to a specific physical location, unlike the fixed telephone 114. Therefore, even when the user is not near the personal computer 113 of the user's home 103, for example, if he / she carries a portable personal computer with a wireless communication card, he / she can receive an e-mail within the reach of radio waves. Is possible. Similarly, an electronic mail can be received using a communication cable at a location such as a destination office. That is, if a predetermined setting such as an e-mail address received by the personal computer 113 or a POP (Post Office Protocol) server is performed, the same e-mail can be sent to the portable personal computer or other general communication terminal. Can be received.

  However, a certain type of communication terminal such as a cellular phone can receive only an e-mail in a specific format corresponding to its product according to a specific specification. A person who has such a communication terminal personally works by using a personal computer 113 of the company during the daytime, for example, and receives a general-purpose e-mail from a business partner at that time And If you have a communication terminal that can only receive e-mails of the specific format described above and you are away from the company on a sudden business trip, that person will send their personal e-mail address to each person in charge of the business partner. It is practically impossible to notify a temporary change to, as it will send a useless mail to a person who is not scheduled to communicate during that period. This is an example, but in such a case, the invention of this modification can be applied.

  In the ADSL router 112A of the first modified example, the IP routing processing unit 123 connects the mail address management unit 301 and the mail address transfer processing unit 302. Among these, the mail address management unit 301 registers a mail address as a transfer destination of the e-mail and stores an e-mail reception history. The mail address transfer processing unit 302 accesses the mail server 107 shown in FIG. 1 at a predetermined interval while the personal computer 113 is turned off, and when an email is received, The address information is acquired and transferred to a designated destination.

  FIG. 9 shows a registration processing area of the mail address management unit in the first modification. In the registration processing area 301A of the mail address management unit, a mail address (transfer mail address) desired by the user as a transfer destination is input in advance from the operation unit 130 shown in FIG. The user can also transfer the e-mail to these transfer e-mail addresses as a time interval and information on “valid” or “invalid” indicating whether or not transfer to the current transfer destination is possible (transfer function ) Is set. For example, the forwarding mail address “1234@567.co.jp” is set to perform forwarding processing every four hours, and forwarding is “valid”. Therefore, if an e-mail addressed to the user is received, the e-mail address is transmitted to the transfer e-mail address “1234@567.co.jp”. In this example, an e-mail address is sent to this address that is “valid” every 4 hours, and for “9abc@123.co.jp”, that address is sent each time an e-mail is received. Is sent.

  FIG. 10 shows the reception history area of the mail address management unit. In the reception history area 301B of the mail address management unit, the address of the electronic mail received by the mail server 107 (see FIG. 1) and the time when the sender sent the mail are left as a history.

  FIG. 11 shows an outline of the processing of the mail address transfer processing unit. The mail address transfer processing unit 302 is based on the shortest interval among the “transfer intervals” of the transfer email addresses set as “valid” in the registration processing area 301A of the mail address management unit in FIG. It is determined whether or not the mail check time for the mail server 107 has arrived (step S401). However, it is assumed that the personal computer 113 is turned off. If the power is on, the user is at home and can receive e-mail. In the example shown in FIG. 9, the “transfer interval” that is “valid” is “4H (hours)” and “anytime”. It is determined that the e-mail check time has come when 10 minutes have passed since the previous e-mail check. When the mail check time comes (step S401: Y), the mail address management unit 301 outputs the same mail server access signal as that used when the personal computer 113 accesses the mail server 107. This mail server access signal is set in advance in the ADSL router 112A by the user of the personal computer 113, and includes a user ID (Identification), the name of the mail server 107 that has received the e-mail, and a password. The mail server access signal is sent from the ADSL router 112A to the telephone line 102 via the user home side splitter 111, and is sent to the mail server 107 of the Internet 106 shown in FIG.

  In this way, the mail address transfer processing unit 302 accesses the corresponding mail server 107 to acquire the received mail address and the reception time at these mail servers 107 for the user (step S402). At this time, acquisition of these data already received can be omitted. The acquired received mail address and the reception time at these mail servers 107 are stored in the reception history area 301B of the mail address management section shown in FIG. 10 (step S403). Then, the data stored in the reception history area 301B is edited as a text and transmitted to the corresponding mail address (step S404). For example, with respect to “9abc@123.co.jp” as the forwarding mail address that is “as needed” in FIG. If there is no data acquired this time, transmission is not performed. For “1234@567.co.jp” as the forwarding mail address “4H (time)”, if 4 hours have not elapsed since the previous scheduled transmission time, the reception history area 301B Even if there is data in the e-mail, the e-mail is not transmitted.

  If the process of step S404 is performed, the e-mail address transfer processing unit 302 next deletes the received e-mail address and the received time as data related to the e-mail transmitted to all of the “valid” e-mail addresses. (Step S405). This is to delete unnecessary data so that the reception history area 301B of the mail address management unit shown in FIG. 10 does not overflow.

  As described above, according to the first modification of the present invention, even when the user goes out without using the personal computer 113, the e-mail dedicated to the communication terminal such as his / her mobile phone is used. If the address is a notification destination and the forwarding function is enabled, the notification can be received when an e-mail arrives. Therefore, when the user determines that it is necessary to check the mail text from the mail address, the user can access and check the contents if the mail server 107 can be accessed from the communication terminal. Even when the communication terminal cannot read the corresponding electronic mail, it is possible to take measures such as reading the electronic mail using another accessible communication terminal.

  <Second Modification of Invention>

  FIG. 12 shows the reception history area of the mail address management unit in the second modification of the present invention, and corresponds to FIG. 10 in the first modification. In the second modification, not only the received mail address as shown in FIG. 10 but also the incoming telephone number is stored in the reception history area 301C. In the “incoming time / other party mail sending time” column, the other party mail sending time, which is the sending time of the electronic mail received by the mail server 107 (see FIG. 1), and the incoming call time of the telephone are stored. Therefore, the mail address transfer processing unit (not shown) of this modification is applied to the transfer mail address that is “valid” in the registration processing area similar to the registration processing area 301A of the mail address management section shown in FIG. It is notified that mail has been received and a call has been made at the time interval defined as the “transfer interval”.

  As described above, according to the second modification of the present invention, not only the notification of the received e-mail when the user is not using the personal computer 113 (see FIG. 8) but also the telephone 114 (see FIG. 8). The telephone number of the telephone that has been dialed when it cannot be received can be notified as a mail of a desired address.

It is a schematic block diagram showing the outline | summary of the communication system in one Example of this invention. It is the block diagram showing the structure of the ADSL router of a present Example with the circuit structure of a periphery. FIG. 2 is a flowchart showing a state of signal processing until a call signal is transmitted from a telephone exchange when a telephone call is made to the telephone set shown in FIG. 1. It is a flowchart showing the mode of a setting / change process according to a user in a present Example. It is explanatory drawing showing a part of mail address registration part of a present Example. It is explanatory drawing showing the outline | summary of the incoming call process of a telephone. It is a flowchart showing the mode of the transfer process of the electronic mail by a present Example. It is the block diagram showing the structure of the ADSL router in the 1st modification of this invention with the peripheral circuit structure. It is explanatory drawing showing the registration process area | region of the mail address management part in a 1st modification. It is explanatory drawing showing the reception log | history area | region of the mail address management part in a 1st modification. It is a flowchart showing the outline | summary of the process of the mail address transfer process part in a 1st modification. It is explanatory drawing showing the reception log | history area | region of the mail address management part in the 2nd modification of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Communication system 101 Station 102 Telephone line 103 User house 104 Telephone network 106 Internet 107 Mail server 112, 112A ADSL router 113 Personal computer 114 Telephone 118 Telephone exchange 123 IP routing processing part 126 Mail address registration part 127 Telephone reception log | history storage part 128 Telephone number detection unit 301 Mail address management unit 301A Registration processing area 301B, 301C Reception history area 302 Mail address transfer processing unit

Claims (4)

A mail server;
A communication terminal for receiving e-mail from the mail server;
An address registration means for registering a pair of an e-mail address used for reception by the communication terminal and a transfer address prepared for e-mail transfer when the e-mail of the address is not received;
Power off detection means for detecting a state in which the power of the communication terminal is off;
When it is detected by the power-off detection means that the power of the communication terminal is turned off, the electronic mail of the address that is used when receiving the communication terminal by accessing the mail server at a predetermined time interval. A communication system comprising: e-mail access information transfer means for transferring access information of the e-mail to a corresponding transfer address with reference to the address registration means when a mail exists. An access information acquisition means for acquiring a caller's telephone number obtained before an incoming call when a call is made to a user of the communication terminal in a state where the power of the communication terminal is off ; A splitter that separates or mixes signals in a band and a band for data communication, and the e-mail access information transfer means assigns the telephone number of the caller acquired by the access information acquisition means to the data on the telephone line. 2. The communication system according to claim 1, wherein the communication is transferred to a transfer address registered in the address registration means using a communication band. The telephone is connected to a fixed telephone, and the fixed telephone and the communication terminal are connected to the splitter via an ADSL (Asymmetric Digital Subscriber Line ) router. 2. The communication system according to 2. An off state detection step of detecting when a communication terminal that receives an e-mail from a predetermined mail server is turned off;
When it is detected in this off state detection step that the power of the communication terminal is turned off, the mail server is accessed at a predetermined time interval, and an e-mail used by the communication terminal for reception is received. A mail server access step for determining whether an e-mail reaches the address;
When it is determined in this mail server access step that an e-mail has arrived at the e-mail address used when the communication terminal receives the e-mail, the e-mail is transferred in case the e-mail at this address is not received. communication method characterized by the transfer address prepared for use includes an electronic mail access information transfer step of transferring the access information of the electronic mail.

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