JP2003289379A - Internet telephone system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an Internet telephone system capable of easily acquiring a dynamic IP address, performing low-cost communication and performing emergency telephone communication. <P>SOLUTION: In this Internet telephone system 21 in which a plurality of telephone sets are connected to the Internet network 30 to freely communicate with one another, the telephone sets are freely connected to a public telephone line 29, a transmitting side telephone set 22 uses the public telephone line 29 to transmit the IP address of the telephone set 22 to a receiving side telephone set 31, the telephone set 31 transmits the IP address of the telephone set 31 to the telephone set 22 through the Internet network 30 by the received IP address, and the public telephone line 29 is disconnected when two-way communication is freely performable through the Internet network 30 by mutually acquiring the IP addresses, performing speech communication between the telephone sets 22 and 31 through the Internet network 30. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internet telephone system, and more particularly to an internet telephone system capable of easily obtaining a dynamic IP address.

[0002]

2. Description of the Related Art A conventional telephone system of this type will be described with reference to FIGS. In FIG. 3, reference numeral 1 is a telephone system using a public switched telephone network (PSTN). In the telephone system 1, a plurality of telephones 2, 2 ... Are relayed through subscriber exchanges (LS) 3, 3. Connected to the exchanges (TS) 4, 4, ...
4 are connected to the public telephone line network 5. The telephone set 2 is connected to another similarly connected telephone set 2 by a telephone number so that they can talk with each other.

Since the telephone system 1 has a widespread telephone number, it is possible to talk with a large number of parties in a wide range, and it is an emergency telephone number such as 110.
You can easily call 119. However, since the telephone system 1 charges a communication charge in proportion to the call distance and the call time, there is a problem that the charge becomes high.

In FIG. 4, reference numeral 6 denotes an internet telephone system. In the internet telephone system 6, a plurality of telephones 7, 7, ... Are subscriber exchanges (LS) 8, 8, ... And a repeater exchange (TS) 9. , 9 ... Is connected to a provider (ISP) 10, 10 ,.
0, 10 ... Are connected to the Internet 11.

The telephone 7 is constructed so that it can communicate with another telephone 7 connected in the same manner by the IP address and can talk on the telephone. In the Internet telephone system 6, since the communication charge is not proportional to the call distance and the call time, the public telephone line network (PST) described above is used.
It can be used at a lower cost than the telephone system 1 using N).

However, since the IP address used for the Internet telephone system 6 is not as popular as a telephone number, its use is limited.
In particular, the IP address includes a fixed IP address that is fixed and used without changing for each connection, and a dynamic IP address that changes for each connection. Communication using the fixed IP address is the IP of the communication partner. The connection is easy because the address can be specified, but the fixed IP address has not been widely used yet. On the other hand, although the dynamic IP address is relatively widely used, it is difficult to obtain the IP address of the other party because it changes for each connection.
It is difficult to make emergency calls to No. 10, 119 etc.

[0007] Therefore, there arises a technical problem to be solved in order to provide an internet telephone system which can easily obtain a dynamic IP address, can perform low-cost communication, and enable emergency telephone contact. The present invention aims to solve this problem.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been proposed in order to achieve the above-mentioned object, and is an internet telephone system in which a plurality of telephones are connected to an internet line and can communicate with each other. To the public telephone line, the IP telephone address of the transmitting telephone is transmitted to the receiving telephone from the transmitting telephone using the public telephone line, and the receiving telephone receives the IP address via the internet line. IP of the receiving telephone
An address is transmitted to the transmitting side telephone, and when the Internet line becomes bidirectionally communicable by mutual acquisition of the IP address, the public telephone line is disconnected, and the transmitting side telephone and the receiving side are connected via the internet line. An internet telephone system configured to make a telephone call between telephones, an internet telephone system in which the internet line and the public telephone line are connected using a DSL line, and an internet telephone system in which the internet line and the public telephone line are connected using optical fibers The Internet telephone system, and the above-mentioned Internet line and public telephone line provide an Internet telephone system for connection using CATV.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described in detail below with reference to FIGS. In FIG. 1, reference numeral 21 is an Internet telephone system. The Internet telephone system 21 uses, for example, a transmitting side telephone 22 used as a transmitting side and the transmitting side telephone 22 for utilizing the Internet line. A personal computer 23 capable of connecting to the Internet is connected to a transit exchange (TS) 25 via a subscriber exchange (LS) 24, and the transit exchange 25
Is connected to a public telephone line network (PSTN) 26, is connected to a provider (ISP) 27, and the provider 27 is connected to the Internet 28. That is,
A public telephone line 29 is used as a circuit passing through the public telephone line network 26, and an Internet line 30 is used as a line passing through the Internet 28.

The receiving side telephone 31 used as the receiving side and the personal computer 32 which can be connected to the internet for using the receiving side telephone 31 by using the internet line are the same as the transmitting side. The relay exchange 32 is connected via 33, the relay exchange 34 is connected to the public telephone line network 26, the relay exchange 34 is connected to the provider 35, and the provider 35 is connected to the Internet 28. That is, similarly to the above, the public telephone line 29 is used for the line passing through the public telephone line network 26, and the Internet line 30 is used for the line passing through the Internet 28.

The transmitting side telephone 22 and the receiving side telephone 31 are examples of a plurality of telephones connected to the Internet telephone system 21, and each telephone is an arbitrary telephone connected to the Internet telephone system 21. It is configured to communicate with each other.

When making a call using the Internet telephone system 21, as shown in FIG. 2 (a), when the transmitting side telephone 22 makes a call to the receiving side telephone 31 by the telephone number, the public telephone line is obtained. It is connected to the receiving-side telephone 31 of the receiving side via 29, and the IP address of the transmitting-side telephone 22 embedded in the telephone number in advance is transmitted from the transmitting-side telephone 22 via the public telephone line 29. It is transmitted to the receiving side telephone 31 together with the telephone number. The IP address can be obtained by the number display, and in that case, the receiving side telephone 31 is turned on.
With the hook, the IP address can be acquired without being charged. If the IP address cannot be obtained by the number display, the receiving side telephone 31 is turned on.
The FF hook is used to acquire the IP address.

Next, the receiving side telephone 31 is put into the OFF hook, and at the moment when the receiving side telephone 31 is put into the OFF hook, the IP address of the receiving side telephone 31 is transmitted to the transmitting side telephone 22 through the Internet line 30. However, even when the receiving side telephone 31 is set to the OFF hook, the public telephone line 29 is held by software so that the establishment of bidirectional communication is regulated so that the telephone is not charged.

Then, at the moment when the mutual IP addresses are obtained on the Internet line 30 and the two-way communication becomes possible, the transmitting side telephone 22 disconnects the public telephone line 29 and makes a voice call only by the Internet line 30. Start two-way communication. The public telephone line 29 and the Internet line 30 are preferably connected by using a DSL line, but other than the DSL line, connection using an optical fiber or CATV is also possible.
Other lines can also be used.

In this way, the Internet telephone system 21 uses the public telephone line 29 only for delivering and receiving the IP address, and the voice communication is performed by the inexpensive Internet line 30, so that low cost communication is possible. In particular, when a DSL line is used for the Internet telephone system 21, the communication charge of the DSL line is a fixed amount, which is advantageous in that the communication charge is extremely low, and since the connection is always on, the communication is quick. You can do it. Also, in the case of connecting using an optical fiber or CATV, similarly, the communication fee is low and the communication can be performed quickly.

The Internet telephone system 21 is also provided.
Since it also has a public telephone line 29, it is possible to make a call using a telephone number via the public telephone line 29 in an emergency. The present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention extends to the modified one.

[0017]

As described in detail in the above one embodiment, the invention according to claim 1 makes it possible to connect a telephone to a public telephone line in the Internet telephone system, and to connect the public telephone line. Using the transmitting side telephone, the transmitting side telephone transmits the IP address of the transmitting side telephone to the receiving side telephone, and the receiving side telephone transmits the IP address of the receiving side telephone to the transmitting side telephone through the Internet line by the received IP address. When the Internet line becomes free for two-way communication by transmitting and receiving the IP address, the public telephone line is disconnected, and a call is made between the transmitting side telephone and the receiving side telephone via the internet line. Since it is configured, the Internet telephone system uses the public telephone line only for delivering and receiving the IP address, and Order to carry out the story, it becomes possible low-cost communications. Furthermore, since the Internet telephone system also has a public telephone line, it is possible to make a telephone call using a telephone number through the public telephone line in an emergency.

According to the second aspect of the invention, since the Internet line and the public telephone line are connected by using the DSL line, in addition to the effect of the first aspect of the invention, the communication fee is charged by the flat-rate DSL line. It is extremely inexpensive and can be communicated quickly because it is always connected.

Further, in the invention of claim 3, since the Internet line and the public telephone line are connected by using an optical fiber, in addition to the effect of the invention of claim 1, the optical fiber can keep the communication charge low. With
Communication can be done quickly. Furthermore, the invention according to claim 4 is
Since the Internet line and the public telephone line are connected by using CATV, in addition to the effect of the invention described in claim 1, the CATV can suppress the communication charge at low cost, and the communication can be performed quickly. It is an invention that has the following effects.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a conceptual diagram of an Internet telephone system.

2A is a conceptual diagram illustrating a state in which an IP address is transmitted from a transmitting side telephone to a receiving side telephone through a public telephone line in the Internet telephone system of FIG. (B) A conceptual diagram for explaining a state in which an IP address is transmitted from a receiving side telephone to a transmitting side telephone via an internet line in the internet telephone system of FIG. (C) A conceptual diagram for explaining a state in which the receiving side telephone and the transmitting side telephone communicate with each other via the internet line in the internet telephone system of FIG.

FIG. 3 is a conceptual diagram of a telephone system using a public telephone line network, showing a conventional example.

FIG. 4 is a conceptual diagram of an Internet telephone system showing a conventional example.

[Explanation of symbols]

21 Internet telephone system 22 sender's telephone 29 public telephone lines 30 internet lines 31 Receiver phone

Continued front page    (72) Inventor Takao Inoue             2 Mitsu, 8-8, Kokuryo-cho, Chofu-shi, Tokyo             Mi Electric Co., Ltd. F term (reference) 5K030 GA17 HB01 HB14 HD10 JT01                       LB02                 5K051 AA05 BB01 CC01 CC02 CC04                       DD01 DD11 HH27 JJ04                 5K101 KK02 KK13 LL01 LL02 LL03                       LL06 LL16 NN01 NN14 PP03                       RR27 SS07 SS08 TT01

Claims (4)

[Claims] 1. In an internet telephone system in which a plurality of telephones are connected to an internet line and can communicate with each other, the telephones can be freely connected to a public telephone line, and the public telephone line can be used to transmit data from a transmission side telephone to the public telephone line. The IP address of the transmitting side telephone is transmitted to the receiving side telephone, and the receiving side telephone transmits the IP address of the receiving side telephone to the transmitting side telephone through the Internet line by the received IP address. When the internet line becomes bidirectionally communicatable by mutual acquisition, the public telephone line is disconnected, and a call is made between the transmitting side telephone and the receiving side telephone via the internet line. Internet telephone system. 2. The Internet telephone system according to claim 1, wherein the Internet line and the public telephone line are connected using a DSL line. 3. The internet telephone system according to claim 1, wherein the internet line and the public telephone line are connected using an optical fiber. 4. The Internet telephone system according to claim 1, wherein the Internet line and the public telephone line are connected using a CATV.