JP2003046666A - Ip telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an IP telephone set, with which voice communication can be performed by VoIP by inputting the telephone number of a party without inputting an IP address or domain name which is difficult to match with the telephone number of a public line network for a user. SOLUTION: An IP corresponding telephone set 1 is provided with a means for generating the domain name on the basis of the telephone number of the party on the public line network inputted by the user and on the basis of the domain name, the voice communication is performed through a repeater 21 to an IP telephone set 23 of the party connected to the repeater 21 by VoIP.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to VoIP (Voice
The present invention relates to an IP-compatible telephone that performs voice communication using over Internet Protocol) technology.

[0002]

2. Description of the Related Art In recent years, VoIP technology, which is a technology for performing voice communication on the Internet, has been developed, and by using this VoIP technology, an IP compatible telephone capable of making a call via the Internet has been realized. It was

[0003]

In the above IP compatible telephone, the user needs to input the IP address or domain name in order to specify the telephone of the other party.
The IP address and domain name are complicated and it is difficult to understand the correspondence with the telephone number of the public network.

The present invention has been made in view of such circumstances, and a domain name is generated based on the input telephone number of the public line network of the destination and the destination of the destination is based on the domain name. VoI for the relay device connected to the telephone
It is an object of the present invention to provide an IP-compatible telephone capable of performing voice communication with the destination telephone by allowing the user to input a telephone number of the public network by providing a means for performing voice communication by P.

[0005]

The IP-compatible telephone according to the first aspect of the present invention is an IP-compatible telephone that is connected to a public line network and the Internet network to perform voice communication, and is a telephone number of the input destination public line network. Means for generating a domain name based on the domain name, a determining means for determining whether or not voice communication by VoIP is possible with the other party's telephone via the Internet network based on the domain name, and the determining means uses VoIP. And a means for performing voice communication by VoIP when it is determined that voice communication is possible.

According to the first aspect of the invention, the user inputs the telephone number of the other party's public line network and performs voice communication by VoIP over the Internet network, so that the correspondence with the telephone number is difficult to understand. Since it is not necessary to input an address or a domain name, it is possible to perform voice communication by VoIP by the same operation as in the case of performing voice communication via a conventional public line network.

In the IP telephone according to the second aspect of the present invention, in the first aspect of the present invention, the determining means is means for inquiring an external device about an IP address for the domain name, and the other party to which the IP address is assigned. It is characterized by comprising means for transmitting a signal for starting voice communication to a relay device connected to the telephone set, and means for requesting a voice communication session by VoIP.

According to the second aspect of the invention, an IP address for the domain name is inquired to an external device, and if the inquiry is successful, voice communication is performed to the relay device connected to the destination telephone, to which the IP address is assigned. By transmitting a signal for starting the packet and requesting a session for voice communication by VoIP when there is a response to the packet, and when the session is established, the voice communication by VoIP is started. The user can reliably perform voice communication by VoIP from the IP compatible telephone.

An IP compatible telephone set according to a third aspect of the present invention is the IP telephone set according to the first or second aspect of the invention, wherein the determining means determines the VoIP
When it is determined that the voice communication is not possible, a means for performing voice communication via the public line network is provided.

In the third invention, the other party's telephone is V
When voice communication by oIP is impossible, voice communication with the other party's telephone can be performed via the conventional public line network.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments thereof. FIG. 1 shows the I according to the present invention.
It is a schematic diagram which shows the connection form to the network of a P corresponding telephone. In FIG. 1, reference numeral 1 denotes an IP compatible telephone according to the present invention, which is connected to the Internet 2 and an analog public line network (PSTN) 3.

A large number of gateway devices 21, 21 ... Each having an IP address are connected to the Internet 2, and the LAN 22 is connected to the gateway device 21.
The IP compatible telephone 23 is connected via. Also,
The PSTN 3 is connected to a number of telephones 31, 31, ...

The IP compatible telephone 1 uses SIP (Session Initiation Protocol) as a VoIP protocol to transmit voice data converted into a digital voice signal to the gateway device 21 via the Internet 2. The gateway device 21 uses the received voice data as L
It is transmitted to the IP compatible telephone 23 via the AN 22. As a result, the voice data transmitted from the IP compatible telephone 1 is received by the IP compatible telephone 23 in real time.

Further, the IP-compatible telephone 1 transmits an analog voice signal to the telephone 31 via the PSTN 3, whereby the voice data transmitted from the IP-compatible telephone 1 is received by the telephone 31 in real time.

FIG. 2 is a block diagram showing the configuration of the IP-compatible telephone 1 according to the present invention. In FIG. 2, the IP compatible telephone 1 includes a control unit 10, a ROM 11, a RAM 12, and an N.
CU (Network Control Unit) 13, NIC (Network
Interface card) 14, an operation unit 15, a display unit 16, a handset 17 including a microphone 171, and a speaker 172, an A / D converter 181, a D / A converter 182,
The audio CODEC 19 is included.

The control unit 10 is composed of a CPU,
It is connected to the above-described hardware of the IP-compatible telephone 1 via a bus and executes a computer program stored in the ROM 11 which is necessary for the operation of the IP-compatible telephone 1 and performs a predetermined function.

The RAM 12 is composed of an SRAM, a flash memory or the like, and stores temporary data generated during execution of software, and also functions as a voice memory for transmission and reception. The NCU 13 is hardware for connecting and disconnecting the IP compatible telephone 1 and the PSTN 3. The NIC 14 is a board for connecting the IP compatible telephone 1 to the Internet 2.

The user operates the operation unit 15 by the IP compatible telephone 1
It is equipped with a numeric keypad and various function keys necessary for operating the. By operating the ten keys provided on the operation unit 15, the telephone number of the other party is input. The display unit 16 is a display device such as a liquid crystal display device,
The operating state of the IP compatible telephone 1 and the telephone number of the other party are displayed.

The handset 17 is connected to the NCU 13, and the voice input to the microphone 171 is converted into a digital voice signal by the A / D converter 181 when transmitted through the Internet 2 and is transmitted and received. The signal is stored in the RAM 12 and the D / A
It is converted into an analog audio signal by the converter 182 and output from the speaker 172. Further, when passing through the PSTN 3, an analog voice signal is transmitted and received by the NCU 13. The audio CODEC 19 is hardware that encodes and decodes audio data.

3 and 4 are flowcharts showing the processing procedure when the IP compatible telephone 1 is connected to the telephone of the other party. The IP-compatible telephone 1 accepts the input of the telephone number of the other party (step S101), and adds the organization name, organization attribute, country code, etc. to the input telephone number, and then the domain name (for example, telephone number.abc .ne.io) is generated (step S102). And the Internet 2
(Step S103), the inquiry packet of the IP address corresponding to the domain name is transmitted to the Internet 2 (step S104).

The DNS server is specified by the routing by the router existing on the Internet 2, and the specified DNS server receives the inquiry packet of the IP address in step S104 (step S20).
1), collate with a database owned by itself (step S202), and send a reply packet of an IP address corresponding to the domain name to the Internet 2 (step S203). When the router cannot specify the DNS server, a packet indicating that the IP address corresponding to the domain name cannot be found is transmitted to the IP compatible telephone 1.

The IP-compatible telephone 1 receives a packet from the Internet 2 (step S105), determines whether the received packet is a reply packet indicating an IP address (step S106), and indicates the IP address. When it is determined that the packet is a reply packet (step S10)
6: YES), the inquiry packet of the SIP port number corresponding to the IP address is transmitted again to the Internet 2 (step S107).

The DNS server identified by the routing by the router existing on the Internet 2 receives the inquiry packet in step S107 (step S204), compares it with the database owned by itself (step S205), and then the IP A reply packet indicating the SIP port number corresponding to the address is transmitted on the Internet 2 (step S206). Router is DNS
When the server cannot be specified, a packet indicating that the SIP port number corresponding to the IP address cannot be found is transmitted to the IP compatible telephone 1.

The IP compatible telephone 1 receives a packet from the Internet 2 (step S108), and determines whether the received packet is a reply packet indicating the SIP port number (step S109). Step S1
If it is determined in step 09 that the reply packet indicates the SIP port (step S109: YES), the IP
An INVITE packet for starting voice communication is transmitted to the port of the SIP port number of the relay device (gateway device 21 in the present embodiment) to which the address is assigned (step S110). When it is determined in step S109 that the reply packet does not indicate the SIP port number (step S109: NO), the INVITE packet is transmitted to the default port of the gateway device 21 (step S111).

After transmitting the INVITE packet in step S110 or step S111, it is determined whether a response packet to the INVITE packet from the gateway device 21 is received (step S11).
2) If it is determined that the response packet has been received (step S112: YES), a packet requesting the gateway device 21 for a session for performing voice communication by VoIP is transmitted (step S113). Gateway device 2
It is determined whether or not a packet indicating that the session 1 has been established is received (step S114), and when it is determined that the packet has been received (step S114: YES), voice data is transmitted / received to / from the gateway device 21 (step S1).
15), the process ends.

The gateway device 21 calls the IP compatible telephone 1 via the LAN 23 and transmits the voice data received from the IP compatible telephone 1 to the IP compatible telephone 23. Further, the gateway device 21 is the IP compatible telephone 2
The voice data received from 3 is transmitted to the IP compatible telephone 1 via the Internet 2. As a result, voice communication by VoIP between the IP compatible telephone 1 and the IP compatible telephone 23 is performed via the Internet 2.

When it is determined that the packet received in step S106 is not the reply packet indicating the IP address (step S106: NO), step S112.
When it is determined that the response packet has not been received in step S112 (NO in step S112), and it is determined that the packet indicating that the session has been established is not received in step S114 (step S114: N).
O), calls the telephone set to which the telephone number input in step S101 is added via the PSTN 3 (step S116), and transmits / receives voice data (step S1).
17), the process is ended.

In the above embodiment, SIP was used as the VoIP protocol, but the VoIP protocol is not limited to this, and other protocols capable of performing voice communication in real time via the Internet may be used.

[0029]

According to the first aspect of the present invention, the user inputs the telephone number of the other party's public line network and performs voice communication by VoIP over the Internet network. Since it is not necessary to input an incomprehensible IP address or domain name, voice communication by VoIP can be performed by the same operation as in the case of performing voice communication via a conventional public line network.

According to the second aspect of the invention, the IP address for the domain name is inquired to the external device, and if the inquiry is successful, the voice is sent to the relay device connected to the telephone of the other party, to which the IP address is given. By transmitting a signal for starting communication and requesting a session for voice communication by VoIP when there is a response to the packet, and when the session is established, voice communication by VoIP is started. The user can reliably perform voice communication by VoIP from the IP compatible telephone.

According to the third invention, the other party's telephone is Vo
When voice communication by IP is impossible, voice communication with the other party's telephone can be performed via a conventional public line network.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a connection form of an IP compatible telephone according to the present invention to a network.

FIG. 2 is a block diagram showing a configuration of an IP compatible telephone according to the present invention.

FIG. 3 is a flowchart showing a processing procedure of the IP compatible telephone according to the present invention.

FIG. 4 is a flowchart showing a processing procedure of the IP compatible telephone according to the present invention.

[Explanation of symbols]

1 IP compatible telephone 2 Internet 21 Gateway device (relay device) 22 LAN 3 Public line network (PSTN) 10 Control unit

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Claims (3)

[Claims] 1. A means for generating a domain name based on an input telephone number of a public line network of a destination in an IP compatible telephone which is connected to a public line network and an internet network and performs voice communication, and the domain name. Based on the Internet network, a judging means for judging whether or not the VoIP voice communication is possible with the other party's telephone, and when the judging means judges that the VoIP voice communication is possible, the VoIP voice An IP-compatible telephone, which is provided with means for performing communication. 2. The determination means, means for inquiring an external device about an IP address for the domain name,
It is characterized by comprising means for transmitting a signal for starting voice communication to a relay device connected to the other party's telephone, to which the IP address has been given, and means for requesting a voice communication session by VoIP. Item I
P-compatible phone. 3. The IP according to claim 1, further comprising means for performing voice communication via a public line network when the determining means determines that voice communication by VoIP is impossible. Compatible phones.