JP2005086636A - Communication system, gateway unit and analog communication terminal device used for it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication system which can perform appropriate communications, of which the gateway unit can acquire destination information easily, of which the analog communication terminal device can receive the destination information from the gateway unit without using new control, and to provide a gateway unit and an analog communication terminal device for use in the system. <P>SOLUTION: When a gateway unit GW2 transmits destination information with a data modem, an analog telephone device TL 2 analyzes the destination information, and determines whether the destination is a telephone device, a facsimile machine, or a personal computer. According to the arrangement, the communication system can perform appropriate communications. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a communication system that connects an analog communication terminal that uses an analog public line network as a line to an IP network via a gateway device, and an analog communication terminal that uses an analog public line network as a line to the IP network. The present invention relates to an analog communication terminal apparatus connected to a gateway apparatus and a gateway apparatus that can communicate with a plurality of communication terminals such as a facsimile apparatus and a telephone and bridge to an IP network.

As a communication connection device used in an IP (Internet Protocol) network, a communication connection device that relays caller ID information to a terminal device on a receiving side by a CID communication service is known (for example, see Patent Document 1).
In addition, a gateway device that determines whether or not to connect a line by using a caller ID notification has been proposed by the present applicant (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 2003-8776 Japanese Patent Application Laid-Open No. 2001-223751

  By the way, a communication terminal using IP telephone communication using an IP network, such as a group 3 facsimile apparatus as well as a telephone terminal, is an analog public line network PSTN (Public Switched Telephone Network: also referred to as a subscriber telephone network or POTS). It can be considered that the communication terminal used in the above is applied. Therefore, the conventional gateway device is a method of transmitting the number information of the calling terminal to the receiving terminal or using the transmitted number information and adding the function of the receiving terminal. There is a problem that communication cannot be performed because the communication function of the own terminal and the partner terminal is different only after the incoming call is answered, and the calling side is charged only. .

Further, the conventional gateway device described above has a problem that it is not possible to easily acquire the partner information.
Furthermore, in order for the analog communication terminal device to receive the partner information from the gateway device, there is a problem that new control (sequence) is required.
Therefore, the main object of the present invention is to perform appropriate communication, the secondary object is that the gateway device can easily acquire the partner information, and the secondary object is a new one. An object of the present invention is to provide a communication system in which an analog communication terminal device can receive destination information from a gateway device without using any control, a gateway device used therefor, and an analog communication terminal device.

  The invention according to claim 1 is a communication system in which an analog communication terminal device that uses an analog public line network as a line is connected to an IP network through a gateway device. Information is acquired from an IP network, and the acquired counterpart information is transmitted to a receiving terminal of an analog communication terminal device prior to incoming call.

  The invention according to claim 2 is the invention according to claim 1, wherein the analog communication terminal device includes data modem means for receiving the partner information from the gateway device, and the gateway device contacts the analog communication terminal device. Data modem means for transmitting the destination information is provided.

  The invention according to claim 3 is the invention according to claim 1 or 2, wherein the gateway device uses the ENUM function to obtain the URI from the registration server of the IP network from the caller number prior to receiving the call and obtain the URI. The URI is transmitted to the analog communication terminal as destination information.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the analog communication terminal device receives the URI from the gateway device prior to the incoming call, analyzes the URI, and responds to the other party The communication operation is started, and when the communication function corresponding to the other party is not provided, the incoming call is rejected before the incoming call.

  According to a fifth aspect of the present invention, in a gateway device for connecting an analog communication terminal device using an analog public line network as a line to an IP network, the partner information for acquiring the partner information of the transmitting terminal from the caller number from the IP network It is characterized by comprising acquisition means and counterpart information transmission means for transmitting the acquired counterpart information to the receiving terminal of the analog communication terminal device prior to the incoming call.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the destination information acquisition means uses the ENUM function to acquire the URI from the registration server of the IP network from the caller number prior to receiving the call, The information transmitting means transmits the acquired URI in a first sequence.

  The invention according to claim 7 is the invention according to claim 6, wherein in the first sequence, the polarity is reversed upon arrival and an analog communication terminal activation signal which is a signal different from the calling signal is sent to the analog communication terminal, When the primary response signal is sent from the analog communication terminal, the other party information is transmitted to the analog communication terminal, and the other party information reception completion signal is transmitted from the analog communication terminal within a predetermined time after the analog communication terminal enters the communication operation. Then, a call signal that is an incoming call operation is sent out, and when the secondary response signal is transmitted from the analog communication terminal, the polarity is reversed and the communication is in progress, and the communication is terminated when the end call signal from the analog communication terminal is received. It is characterized by that.

  The invention according to claim 8 is capable of communicating with a plurality of communication terminals such as a facsimile apparatus and a telephone, and in an analog communication terminal apparatus connected to a gateway apparatus that bridges to an IP network, the URI of the transmitting terminal is set from the gateway apparatus prior to the incoming call. The receiving party information receiving means and the received URI are automatically analyzed and the communication operation corresponding to the other party is automatically entered. When the communication function corresponding to the other party is not provided, the line is disconnected before the incoming call. And automatic communication starting means for rejecting communication.

  According to a ninth aspect of the invention, in the eighth aspect of the invention, the destination information receiving means receives the URI in the second sequence.

  The invention according to claim 10 is the invention according to claim 9, wherein in the second sequence, the gateway device reverses the polarity upon arrival and an analog communication terminal activation signal which is a signal different from the call signal is transmitted from the gateway device. The primary response signal is sent to the gateway device, and when the destination information is sent from the gateway device, the destination information is analyzed. When the communication function corresponding to the destination is not provided, the end signal is sent. Sending to the gateway device ends the call.

  According to the present invention, when the gateway device transmits the destination information, the analog telephone analyzes the destination information to determine what the destination is, the analog telephone analyzes the destination information, and the destination Therefore, it is possible to perform appropriate communication, the gateway device can easily acquire the partner information, and the analog communication terminal device can be transferred from the gateway device to the partner without using new control. It is possible to provide a communication system capable of receiving information, a gateway device used therefor, and an analog communication terminal device.

FIG. 1 is a conceptual diagram showing an embodiment of a communication system according to the present invention.
In the figure, gateway devices GW1 and GW2 are used for voice communication by VoIP (Voiceover Internet Protocol) by connecting analog telephones TL1 and TL2 for analog public lines to the IP network NT. Recommendation H. H.323 and IETF SIP are applied as communication protocols.

In addition, the IP network NT is the “Study Report on IP Network Technology” (February 2002, Ministry of Internal Affairs and Communications http://www.soumu.go.jp/5-news/2002/020222). 3. Refer to htmle02), for example, by using the ENUM function to refer to the user's communication information (including identification information such as terminal type) by referring to the telephone number. Provide search services.

Here, the ENUM function refers to a so-called telephone number (= E 164 number (international public telecommunication number defined in ITU-T recommendation E 164)) converted to a domain name (Fully Qualified Domain Name), and DNS (Domain This is a function that makes it possible to search for terminal information (URI = (Uniform Resource Identifiers; refer to RFC2396 etc.)) using Name System.
FIG. 2 is a configuration diagram illustrating an example of the gateway device GW (GW1, GW2) used in the communication system illustrated in FIG.

In FIG. 2, a CPU (Central Processing Unit) 1 controls the operation of the gateway device GW, and a ROM (Read Only Memory) 2 stores a program executed by the CPU 1 at startup and necessary data. A RAM (Random Access Memory) 3 is for configuring a work area of the CPU 1 and the like.
The character generator 4 is for generating graphic character display data, the clock circuit 5 is for outputting the current date and time information, and the IP network I / F (interface) circuit 6 is the gateway. This is for connecting the device GW to the IP network NT (see FIG. 1).

The analog telephone interface circuit 7 is for connecting an analog telephone TL (TL1, TL2, see FIG. 1) to the gateway device GW. The analog telephone TL has a pseudo analog line network function (power supply). Supply), a codec function that mutually converts an analog signal exchanged with the analog telephone TL into a digital signal of a predetermined format, and a DTMF (Dual Tone Multi Frequency) signal received from the analog telephone TL. It also has a demodulation function.
The data modem 8 is for exchanging data with the analog telephone TL. For example, the data modem 8 has a modem function similar to the data modem applied by the caller ID notification function provided by the analog public line network. ing.

The operation display unit 9 is for operating the gateway device GW, and includes an appropriate operation key group (not shown) and a display (not shown).
The magnetic disk device 10 is for storing various data such as various programs executed by the gateway device GW.
The CPU 1, ROM 2, RAM 3, character generator 4, clock circuit 5, IP network interface circuit 6, analog telephone interface circuit 7, data modem 8, operation display unit 9, and magnetic disk device 10 are connected to a bus 11. Data exchange between these elements is mainly performed through the bus 11.

Data exchange between the data modem 8 and the analog telephone interface circuit 7 is performed directly.
The IP network interface circuit 7 conforms to packetization of data to the IP network NT, address processing, collision avoidance and monitoring functions (data link layer in the OSI reference model), and physical / electrical rules. An interface function (including a pulse transformer and the like: a physical layer in the OSI reference model) for the IP network NT is provided.

The CPU 1 executes higher-level protocols such as UDP / TCP (User Datagram Protocol / Transmission Control Protocol) / IP and RTP (Real-time Transport Protocol) for transmitting and receiving voice in real time on the IP network. In addition, as a call control / protocol for IP network NT voice, ITU-T standard H.264 is used. 323. There are IETF default SIPs and the like, which are processed by the CPU 1.
FIG. 3 is a block diagram showing an example of an analog telephone TL (TL1, TL2) that is one of analog communication terminal devices used in the communication system shown in FIG.

In FIG. 3, a CPU (Central Processing Unit) 21 controls the operation of the analog telephone TL, and a ROM (Read Only Memory) 22 stores a program executed by the CPU 21 at startup and necessary data. A RAM (Random Access Memory) 23 is for configuring a work area of the CPU 21 and the like.
The character generator 24 is for generating graphic character display data, the clock circuit 25 is for outputting the current date and time information, and the network control device 26 sends the analog telephone TL to the gateway device GW. To connect to. The network control device 26 also has a function of transmitting a DTMF signal as a selection signal.

The data modem 27 is for exchanging data with the gateway device GW, and has, for example, a modem function similar to a data modem applied by a caller ID notification function provided by an analog public line network. ing.
The operation display unit 28 is for operating the analog telephone TL, and includes an appropriate operation key group (not shown) such as a numeric keypad and a display (not shown).
The call unit 29 is for connecting a voice input / output unit 30 for voice input / output and for detecting on / off hooks.

These CPU 21, ROM 22, RAM 23, character generator 24, clock circuit 25, network control device 26, data modem 27, operation display unit 28, and call unit 29 are performed via a bus 31.
Data exchange between the data modem 27 and the network control device 26 is performed directly.
FIG. 4 shows a procedure in which the gateway device shown in FIG. 1 uses the ENUM function to make an inquiry to the URI registration server from the caller number prior to receiving the call, obtain the URI, and send the obtained URI to the analog telephone. is there.

First, in (1), when the telephone TL1, which is an analog communication terminal on the transmission side, is off-hooked and the identification number (010-81-3-1234-5678) of the corresponding partner is dialed, the gateway apparatus GW1 is dialed from the dialed identification number. Connecting.
Next, in (2), the gateway apparatus GW1 arranges the identification numbers in reverse order from the lower domain than the ENUM function and converts them into the format defined in E164 of the ITU-T recommendation, and searches the DNS of the registration server.

In (3), the DNS server converts the domain name into a user URI registered in advance by the called party and returns it to the gateway device GW1.
In (4), the gateway device GW1 acquires an appropriate gateway IP address and port number based on the acquired user URI.

In (5), the gateway device GW1 routes to the corresponding gateway device GW2 according to the acquired IP address, and transmits a caller number (010-81-3-1111-2222).
The caller number received in (6) is also converted into the format defined by E164, and the DNS of the registration server is searched.

In (7), the DNS server converts the domain name into a user URI registered in advance by the caller and returns it to the gateway device GW2.
Finally, in (8), the gateway apparatus GW2 sends the caller number to the telephone set TL2 from the identification number prior to the incoming call and routes it to the telephone set TL2.
FIG. 5 is an example of a call sequence when the analog telephone TL2 shown in FIG. 1 receives an incoming call.

The case shown in the figure is a sequence (first sequence) when communication is established.
First, upon receiving an incoming call, the gateway device 2 reverses the polarity, and then sends an analog communication terminal activation signal, which is a signal different from the call signal (for example, cadence of 0.5 seconds on / 0.5 seconds off). TL2 returns a primary response signal (DC loop break) and waits for reception of destination information.
When the gateway apparatus GW2 transmits the destination information (for example, URI information) by the data modem, the analog telephone TL2 analyzes the destination information and, for example, determines whether the destination is a telephone, a facsimile, or a personal computer PC. (For example, if the URI information is tel: +813111222, the telephone is determined to be a telephone).

For example, if the other party is a facsimile machine with a telephone, the communication operation corresponding to the other party is started (in this case, it is determined that the other party is a telephone and the communication operation is started by the telephone).
Next, when it is possible to enter a communication operation corresponding to the partner, a partner information reception completion signal (DC loop break) is returned within a certain time.
Receiving it, the gateway apparatus GW2 sends a paging signal (for example, cadence of 1 second on / 2 seconds off) which is the original incoming operation.

The called party raises the handset of the analog telephone TL2 and goes off-hook to return a secondary response signal (DC loop).
After that, the polarity is reversed and communication is in progress. At the end of communication, the called party puts on the handset of the analog telephone TL2 and goes on-hook, so that an end-of-call signal (DC loop cut) is generated. This sequence is the same as the caller ID notification service of NTT (Nippon Telegraph and Telephone Corporation), for example, except that the caller ID information is changed to the destination information.
FIG. 6 shows an example of a call sequence when the analog telephone TL2 shown in FIG. 1 receives a call, and shows a case where communication is rejected (second sequence).

The sequence is the same as that shown in FIG. 4 until the primary response signal (DC loop) is returned. When the gateway apparatus GW2 transmits the destination information (for example, URI information) by the data modem, the analog telephone TL2 analyzes the destination information and determines, for example, whether the destination is a telephone, a facsimile, or a PC (for example, If the URI information is h.323: fax@ricoh.co.jp, it is judged as a facsimile).
For example, when the analog communication terminal device is a telephone, it cannot be received by the facsimile device, and therefore, after a certain period of time, an end signal (DC loop disconnection) is returned and the processing is terminated. In this case, since the secondary response signal (DC loop) is not returned, the calling side is not charged.
FIG. 7 shows an example of processing of the gateway device GW2 when the analog telephone TL2 shown in FIG. 1 receives an incoming call.

First, when a routing signal is received from the IP network in step S10, the caller number of the telephone TL1 is acquired from the gateway device GW1 of the routing destination in step S11.
From step S12, based on the sender number (converted into E164 format in ENUM), a DNS in which destination information is registered in advance is searched.
In step S13, the other party information of the telephone TL1 is acquired from the DNS.
Up to this point, the communication is with the IP network. From here, it will be an exchange for an analog line.
In step S14, the polarity of the analog line is reversed, and in step S15, an analog communication terminal activation signal (for example, 0.5 second on / 0.5 second off cadence) is transmitted.

Here, in step S16, the primary response signal (DC loop) is waited for from the analog telephone TL2, and when this signal is detected, the destination information acquired in step S13 is transmitted from the data modem to the analog telephone TL2 in step S17. To do.
Thereafter, the timer is counted in step S18, and if a predetermined time has elapsed in step S19 (for example, after 7 seconds from transmission of the partner information), the process proceeds to step S26 to release the analog line (DC loop cut). At the same time, a routing cancellation signal is sent to the IP network, and the process ends.
On the other hand, if a DC loop break is detected in step S20 within a certain time, it is determined as a destination information reception completion signal from analog telephone TL2, and a call signal (for example, cadence of 1 second on / 2 seconds off) in step S21. Is sent out.

Here, in step S22, the secondary response signal (DC loop) from the analog telephone TL2 is waited, and when this signal is detected, the polarity of the analog line is reversed in step S23 and communication starts.
Thereafter, in step S25, an end signal (DC loop break) from the analog telephone TL2 is detected, and the process ends.
Here, step S30 and step S38 are necessary steps in the general public line network of the NTT caller ID notification service, but are not particularly necessary here, and may be omitted if the analog telephone TL2 has no operational problem. I do not care.
FIG. 8 shows an example of processing of the analog telephone TL2 when the analog telephone TL2 shown in FIG. 1 receives an incoming call.

First, when polarity reversal is detected from the gateway device GW2 via the analog line in step S30, the process waits for detection of an analog communication terminal activation signal from the gateway device GW2 in step S31, and when that signal is detected, in step S32 A primary response signal (DC loop) is returned to the gateway device GW2.
Next, in step S33, reception of destination information from the gateway device GW2 is awaited. When the information is received from the data modem, the destination information is analyzed in step S34 and the destination corresponding to the own function is analyzed. Judge if there is.

If it is determined in step S35 that it is not the counterpart corresponding to the own function, communication is not possible. Therefore, in step S42, a call termination signal (DC loop disconnection) is sent after a predetermined time, and the incoming call is rejected and the process ends. .
On the other hand, if it is determined that the corresponding partner corresponds to the own function, a partner information reception completion signal (DC loop disconnection) is sent to the gateway apparatus GW2 within a predetermined time in step S36.

Thereafter, in step S37, a call signal from the gateway apparatus GW2 is awaited to be detected. When this signal is detected, a secondary response signal (DC loop) is returned to the gateway apparatus GW2 in step S38.
Next, in step S39, the polarity repolarization is detected from the gateway device GW2 via the analog line, and communication is started.
Thereafter, when the communication is completed, in step S41, an end signal (DC loop disconnection) as an end signal is sent to the gateway device GW2, and the processing is ended. Note that steps S30 and S39 may be omitted as described in the description of FIG.

(Effects of claims 1 to 10)
According to the present embodiment, the gateway device acquires the destination information of the transmission terminal corresponding to the sent caller number from the IP network, and the acquired destination information is an analog that is the receiving terminal prior to the incoming call. By transmitting to the communication terminal device, the analog communication terminal device of the receiving terminal can determine the possibility of communication before response, and as a result, there is an effect that appropriate communication can be performed. Alternatively, if it is determined that appropriate communication cannot be performed, the incoming call can be rejected before the line is established, and there is an effect that no charge is required.

(Effects of claims 3, 6 and 7)
According to the present embodiment, by using the ENUM function, the URI can be acquired from the registration server of the IP network from the caller number prior to the incoming call, and the gateway device can easily acquire the partner information. There is an effect that can be done.

(Effects of claims 6, 9, and 10)
According to the present embodiment, the analog communication terminal device supports the NTT caller ID notification service by using the same sequence as the NTT caller ID notification service for receiving the destination information from the gateway device. If it is an apparatus, there exists an effect which can obtain destination information easily, without using new control.

It is a conceptual diagram which shows one Embodiment of the communication system concerning this invention. It is a block diagram which shows an example of the gateway apparatus GW (GW1, GW2) used for the communication system shown in FIG. It is a block diagram which shows an example of analog telephone TL (TL1, TL2) which is one of the analog communication terminal devices used for the communication system shown in FIG. FIG. 1 shows a procedure in which the gateway device shown in FIG. 1 uses the ENUM function to inquire a URI registration server from a caller number prior to receiving a call to acquire a URI and send the acquired URI to an analog telephone. It is an example of a call sequence when the analog telephone set TL2 shown in FIG. This is an example of a call sequence when the analog telephone TL2 shown in FIG. An example of processing of the gateway device GW2 when the analog telephone TL2 shown in FIG. An example of processing of the analog telephone TL2 when the analog telephone TL2 shown in FIG. 1 receives an incoming call is shown.

Explanation of symbols

1 CPU
2 ROM
3 RAM
4 Character generator 5 Clock circuit 6 IP network I / F (interface)
7 Analog telephone I / F
8 Data modem 9 Operation display section 10 Magnetic disk unit 11 Bus

Claims (10)

  In a communication system in which an analog communication terminal device that uses an analog public line network as a line is connected to an IP network via a gateway device, the gateway device obtains destination information of the transmission terminal from the caller number from the IP network. Then, the acquired communication partner information is transmitted to the receiving terminal of the analog communication terminal device prior to the incoming call.   The analog communication terminal device includes data modem means for receiving the destination information from the gateway device, and the gateway device transmits data destination information to the analog communication terminal device. The communication system according to claim 1, further comprising:   Using the ENUM function, the gateway device obtains a URI from a registration server of the IP network from the caller number prior to receiving a call, and transmits the obtained URI to the analog communication terminal as the destination information. The communication system according to claim 1, wherein the communication system is configured as described above.   The analog communication terminal device receives the URI from the gateway device prior to the incoming call, analyzes the URI, enters a communication operation corresponding to the partner, and does not have a communication function corresponding to the partner 4. The communication system according to claim 1, wherein the incoming call is rejected before the incoming call.   In a gateway device that connects an analog communication terminal device that uses an analog public line network as a line to an IP network, a destination information acquisition unit that acquires destination information of a transmission terminal from the caller number from the IP network, and the acquired A gateway device, comprising: partner information transmission means for transmitting partner information to a receiving terminal of the analog communication terminal device prior to receiving an incoming call.   The destination information acquisition means uses the ENUM function to acquire a URI from the registration server of the IP network from the caller number prior to the incoming call, and the destination information transmission means uses the acquired URI as a first The gateway apparatus according to claim 5, wherein the gateway apparatus transmits data in a sequence of:   In the first sequence, the polarity is reversed when an incoming call is received, an analog communication terminal activation signal, which is a signal different from the call signal, is sent to the analog communication terminal, and the primary response signal is sent from the analog communication terminal. Sends destination information to the communication terminal, and sends a call signal that is an incoming call operation when a destination information reception completion signal is sent from the analog communication terminal within a predetermined time after the analog communication terminal enters the communication operation. 7. The communication device according to claim 6, wherein when the secondary response signal is transmitted from the analog communication terminal, the polarity is reversed so that the communication is in progress, and when the end signal is received from the analog communication terminal, the communication is terminated. Gateway device.   Destination information receiving means capable of communicating with a plurality of communication terminals such as a facsimile apparatus and a telephone, and receiving the URI of the transmitting terminal from the gateway apparatus prior to the incoming call in the analog communication terminal apparatus connected to the gateway apparatus bridging to the IP network When the received URI is analyzed and the communication operation corresponding to the destination is automatically entered, and the communication function corresponding to the destination is not provided, the line is disconnected before the incoming call and the communication is rejected. An analog communication terminal device comprising automatic communication start means for performing.   9. The analog communication terminal apparatus according to claim 8, wherein the destination information receiving means receives the URI in a second sequence.   In the second sequence, when an incoming call is received, the gateway device reverses the polarity, and when an analog communication terminal activation signal, which is a signal different from the call signal, is sent from the gateway device, a primary response signal is sent to the gateway device, When the destination information is sent from the gateway device, the destination information is analyzed, and when the communication function corresponding to the destination is not provided, a call end signal is sent to the gateway device to end the call. The analog communication terminal device according to claim 9.

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