JP2003018293A - E-mail transmission system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an e-mail transmission system by which a transmitted e-mail can automatically be received by an opposite party in real time or in a time similar to real time without using a private line. SOLUTION: A transmitting personal computer adds the telephone number of a receiving personal computer to the electronic mail to be transmitted to the receiving personal computer and transmits it to a transmitting side exchange. The transmitting side exchange specifies a receiving-side exchange from the toll number and the exchange number of the telephone number of the receiving personal computer added to the e-mail received from the transmitting personal computer, and transmits the e-mail to the receiving-side exchange through the Internet. The receiving-side exchange calls the receiving personal computer based on the telephone number included in the received e-mail and transmits the received e-mail to the receiving personal computer answering to the call.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic mail transmission system that enables communication by electronic mail, and in particular,
The present invention relates to an electronic mail transmission system capable of forming a pseudo continuous connection state without using a dedicated line in electronic mail communication.

[0002]

2. Description of the Related Art Conventionally, when sending an e-mail by connecting to the Internet from a general household, an ISP (Internet service provider;
A so-called dial-up method is used in which a telephone is called to a "provider" to connect to the Internet.

FIG. 4 shows the configuration of a conventional electronic mail transmission system. In FIG. 4, a sending personal computer PCa (personal computer that sends e-mail) 101 is connected to a sending side provider ISPx109 via a telephone line (subscriber line 103, telephone network 105, subscriber line 107), and the IP of the e-mail is transmitted. Send a packet. That is, in the sending personal computer PCa101, as shown in FIG. 5, the sender email address: AAA@YYY.com, the recipient email address: BB
Create an email consisting of B@XXX.com and the body,
On the dial-up, the sending side provider ISPx1
09, and when the send button is clicked, the data of the text is divided as shown in FIG. 6 to form a packet with a header for transmission. Here, in the header, the transmission side provider ISPx10, which is the other party here.
9 IP address (IPx) and own IP address (I
Pa) and are included. The packet is a data unit in which the data of the electronic mail is divided into packets (parcels) having a predetermined length or less and the packets are transmitted in accordance with the IP (Internet Protocol) communication procedure.

The transmission side provider ISPx109 is
The received IP packet is transmitted to the receiving side provider ISPy113 via the Internet 111. That is, the sending side provider ISPx109 uses the data of the received IP packet as the recipient's mail address (BBB
@ XXX.com) and read the recipient's email address (BB
B@XXX.com) domain name (XXX.com) is used to determine the IP address (IPy) of the receiving-side provider ISPy113 using a conversion table provided in advance, and the reception destination, which is the destination here, is received in the header. Side provider ISP
The IP address (IPy) of y113 and its own IP address (IPx) are written and transmitted. The reception side provider ISPy113 is the transmission side provider ISPx1.
09 received IP packet, read the above recipient email address (BBB@XXX.com) from the email composed of the received multiple IP packets, and received the above recipient email address (BBB @ XXX.com) To find a BBB user mailbox, store the above e-mail in the BBB user mailbox, and wait for access (connection request) from the receiving personal computer PCb (personal computer that receives the e-mail) 121. Then, the receiving side provider ISPy113 uses the telephone line (subscriber line 11
5, when there is an access (connection request) from the receiving personal computer PCb121 via the telephone network 117 and the subscriber line 119), the authentication password of the receiving personal computer PCb121 is the electronic mail of the electronic mail stored in the mail server. It is determined whether or not the e-mail address corresponds to the e-mail address (BBB@XXX.com), and if they match, the e-mail is transmitted to the receiving personal computer PCb121. That is, here, the receiving side provider ISPy113.
Is the IP address (I
Pb) is calculated using a conversion table provided in advance, and the IP address (IPb) of the receiving personal computer PCb121, which is the destination here, and its own IP address (IPy) are written and transmitted in the header. Therefore, the e-mail is received by the receiving personal computer PCb121, and the e-mail is displayed by selecting the inbox of the mailbox in the receiving personal computer PCb121 and clicking the display operation.

[0005]

However, in the above-mentioned conventional electronic mail transmission method, even if the electronic mail reaches the mail server (the above-mentioned receiving side provider ISPy113), the recipient of the electronic mail receives the above-mentioned reception. Call the side provider ISPy113 to connect to your own personal computer (the receiving personal computer PCb121) via a telephone line, and then to the receiving side provider ISP via the telephone line.
It was necessary to take out the e-mail addressed to me from y113. That is, the receiving personal computer PC
Unless the receiving side provider ISPy113 is accessed from b121, the electronic mail remains stored in the mail server and does not reach the destination. Therefore, there is a problem that even if an emergency e-mail is sent from the sending personal computer PCa101, the e-mail does not reach the receiving personal computer PCb121 in real time or at a time equivalent to real time. As a solution to this, there is a method of always connecting, but there is a drawback that the usage fee is high because a dedicated line or the like is used. Also, most of the commonly used email addresses are relatively long, and
Recently, some characters and numbers are mixed, and there is a drawback that it is easy to make an input error. Further, in the above conventional system configuration, in order to use e-mail, it is necessary to contract with the provider, and it is necessary to pay a high contract fee even if the e-mail is not transmitted / received. Furthermore, there is a problem that the setting work of the provider on the personal computer after the contract is complicated, and among some users who purchase the personal computer for the first time because they want to use e-mail, the contract and setting with the provider are complicated. It was an obstacle. An object of the present invention is to form a pseudo-always-on system without using a dedicated line, so that a transmitted electronic mail can be automatically received by a destination at real time or at a time equivalent to real time. It is to provide a mail transmission system.

[0006]

A feature of the present invention is an electronic mail transmission system for transmitting electronic mail from an arbitrary transmitting side terminal to a desired receiving side terminal via a switch and the Internet, wherein the transmitting terminal is An e-mail with the telephone number of the receiving terminal is created, and the transmitting terminal and the exchange on the transmitting side are dial-connected,
An e-mail to which the telephone number of the receiving terminal has been added is transmitted from the transmitting terminal to the transmitting side exchange, and the telephone number of the receiving terminal added to the electronic mail received from the transmitting terminal at the transmitting side exchange. The receiving side exchange is specified by the above, the above-mentioned e-mail is transmitted to the specified receiving side exchange through the Internet, and the telephone number of the receiving terminal included in the e-mail received at the receiving side exchange is specified. Based on this, a call is made to the receiving terminal, and the received electronic mail is transmitted to the receiving terminal dial-connected in response to the calling. Another feature of the present invention is that the exchange has an exchange unit for performing normal telephone communication and a mail server unit for performing mail packet communication via the Internet, and the electronic mail at the transmitting terminal. It has a switching means for switching from the exchange section side to the mail server section side by the mail identifier added to.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an electronic mail transmission system according to the present invention will be described below. FIG. 1 is a system configuration diagram of an embodiment of an electronic mail transmission system according to the present invention. As shown in FIG. 1, this electronic mail transmission system includes a sending personal computer PCa1 for creating and sending an electronic mail, and a sending side exchange 5 connected to the sending personal computer PCa1 via a subscriber line 3. A receiving side exchange 9 connected to the transmitting side exchange 5 via the Internet 7, and a subscriber line 11 connected to the receiving side exchange 9
And a receiving personal computer PCb (personal computer for receiving e-mail) 13 connected via. The transmission side exchange 5 and the reception side exchange 9 are not shown in FIG. 1, but are also connected to an ordinary telephone network. Figure 2
FIG. 2 is an internal configuration diagram of the transmission side exchange 5 and the reception side exchange 9 shown in FIG. As shown in FIG. 2, the exchanges 5 and 9 include a switching unit 1 connected to the subscriber lines 3 and 11.
5, a switching unit 17 connected to the switching unit 15, and a mail server unit 19 connected to the switching unit 15 and the switching unit 17, and the mail server unit 19 is connected to the Internet 7. The exchange section 17 is connected to a normal telephone network.

Next, the operation of the electronic mail transmission system will be described. First, in the transmission personal computer PCa1, for example, the sender's telephone number is 0 as shown in FIG.
467-74-AAAA, Recipient phone number: 03-5462
-Create an e-mail consisting of BBBB and the text, dial the recipient's phone number 03-5462-BBBB following the mail identification number 0101101 in the above dial-up,
It is transmitted to the exchange 5 through the subscriber line 3 by a PPP (Point to Point Protocol) dial connection. When the switching unit 15 of the exchange 5 receives and detects the mail identification number 0101101, it switches the line to the mail server unit 19 side, and the mail server unit 19 receives the electronic mail. When the mail server section 19 receives the above e-mail, the recipient's telephone number is 03-5462-BBBB.
From the area code: 03 and area code: 5462,
From the reading result, the exchange 9 on the recipient side is specified,
The IP address (IPy) of the exchange 9 is obtained. next,
The mail server unit 19 packet-transmits the electronic mail to the mail server unit 19 of the exchange 9 on the recipient side via the Internet 7. That is, as shown in FIG. 6, the data of the text is divided and formed into a packet together with the header and transmitted. Here, the header includes the IP address (IPy) of the mail server unit 19 of the exchange 9 on the recipient side, which is the other party here, and its own IP address (IPx). What is the above packet?
This is a data unit in which the data of an electronic mail is divided into packets (parcels) having a fixed length or less and transmitted according to an IP (Internet Protocol) communication procedure.

Upon receiving the electronic mail, the mail server unit 19 of the exchange 9 on the recipient side reads the recipient telephone number: 03-5462-BBBB from the electronic mail,
The above telephone number: 03-546 through the exchange section 17
2-Receive personal computer PCb of BBBB (personal computer that receives e-mail) 13
PPP (Point to Point) via b13 and the subscriber line 11
Protocol) Dial connection to send the above e-mail. As a result, the receiving personal computer PCb13 establishes a dial connection with the mail server unit 19 of the exchange 9 on the recipient side to receive the e-mail, and when the display operation is clicked, the e-mail is displayed. Therefore, a pseudo constant connection system can be formed without using a dedicated line, and the transmitted electronic mail can be automatically received by the other party in real time or at a time equivalent to real time.

[0010]

According to the electronic mail transmission method of the present invention, the exchange on the transmitting side has the telephone number of the destination personal computer corresponding to the electronic mail address contained in the electronic mail received from the source personal computer. Is added and sent to the receiving side exchange, and the receiving side exchange sends a received e-mail by calling the destination PC based on the telephone number included in the received e-mail. . Therefore,
The sent e-mail can be automatically received by the other party in real time or at a time equivalent to real time without using a dedicated line.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of an embodiment of an electronic mail transmission system according to the present invention.

2 is an internal configuration diagram of a transmitting side exchange and a receiving side exchange shown in FIG. 1;

FIG. 3 is an explanatory diagram of an electronic mail created by the sending personal computer shown in FIG.

FIG. 4 is a configuration diagram of a conventional electronic mail transmission system.

5 is an explanatory diagram of an electronic mail created by the sending personal computer shown in FIG.

FIG. 6 is an explanatory diagram of a packet of an electronic mail transmitted from a transmitting personal computer.

[Explanation of symbols]

1, 101 Sending personal computer PCa, 3, 11, 103,
107, 115, 119 Subscriber lines, 5 sender exchanges, 7, 111 Internet, 9 receiver exchanges,
13, 121 Receiving personal computer PCb, 15 Switching unit, 1
7 exchange section, 19 mail server section, 105, 117
Telephone network, 109, 113 providers

Claims (2)

[Claims] 1. An electronic mail transmission system for transmitting an electronic mail from an arbitrary sender terminal to a desired receiver terminal via a switch and the Internet, wherein the sender terminal is added with the telephone number of the receiver terminal. When the e-mail is created and the sending terminal and the sending side exchange are dial-connected, an e-mail to which the telephone number of the receiving terminal is added is sent from the sending terminal to the sending side exchange, and in the sending side exchange. The receiving side exchange is specified by the telephone number of the receiving terminal added to the electronic mail received from the transmitting terminal, the electronic mail is transmitted to the specified receiving side exchange through the Internet, and the receiving is performed. The receiving terminal based on the telephone number of the receiving terminal included in the electronic mail received by the local exchange. An electronic mail transmission system is characterized in that the received electronic mail is transmitted to the receiving terminal dial-connected in response to the outgoing call. 2. The exchange has an exchange section for performing ordinary telephone communication and a mail server section for performing mail packet communication via the Internet, and
2. The electronic mail transmission system according to claim 1, further comprising switching means for switching from the exchange section side to the mail server section side by the mail identifier added to the electronic mail in the transmission terminal.