JP2009239422A - Ip telephone system, ip telephone terminal, final digit decision method and computer program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a connection delay by deciding a final digit number immediately reflecting a change in a number system even if the number system is changed and rapidly making a call when a telephone number including the final digit is input. <P>SOLUTION: When the decision information of a final digit stored in a call control device 1 is updated, a distribution device 2 acquires the information and distributes the information to a VoIP-TA 3. The VoIP-TA 3 starts up an inter-digit timer every time one digit of the telephone number of a call destination is input from a telephone terminal 4, and refers to the decision information of the final digit to determine whether the number of final digits is determined. When a telephone number having the number of finally determined digits is input, a call activation request signal in which the input telephone number is set is transmitted to the call control device 1 before time-out of the inter-digit timer. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an IP telephone system, an IP telephone terminal, a final digit determination method, and a computer program.

Conventionally, when using an IP (Internet Protocol) telephone, an IP telephone terminal generates an SIP (Session Initiation Protocol) INVITE signal describing a destination address (for example, To: XXXXXXXXX @...) Need to be sent to the SIP server. Therefore, as shown in FIG. 9, in the IP telephone terminal, the information of the dial number pressed by the user is once aggregated and held up to the last digit, and then the INVITE signal is generated. At this time, it is determined by the interdigit timer whether the input dial number is the last digit. That is, the interdigit timer is activated for each digit of the dial number, and it is determined that the last digit has been input when the interdigit timer expires.
On the other hand, Patent Document 1 describes, as a method of determining the last digit, counting the number of digits at a base station or a subscriber terminal that communicates with the base station by radio.
Japanese Patent No. 3216707

In the method of determining the last digit by the interdigit timer as described above, the INVITE signal is not transmitted from the IP telephone terminal until the interdigit timer expires, which causes connection delay. That is, the calling user waits for a long time after dialing the destination telephone number until a ringing tone (RBT: ringback tone) is heard. However, if the inter-digit timer is too short, it is often determined that the last digit is in the middle of dialing. Therefore, the inter-digit timer cannot be shortened to shorten the connection delay.
On the other hand, in the technique of Patent Document 1, the final digit is determined by counting the number of digits at the base station or the subscriber terminal, but the determination logic of the final digit number is changed in accordance with the change of the numbering system. It is difficult to respond.

  The present invention has been made to solve the above problems, and its purpose is to determine the number of final digits reflecting the change even when the numbering system is changed, and to input the last digit number. An object of the present invention is to provide an IP telephone system, an IP telephone terminal, a final digit determination method, and a computer program that can make an immediate call and reduce connection delay.

  In order to solve the above-described problem, the present invention includes an interdigit timer that is activated each time a destination telephone number is entered, and when the interdigit timer expires, the final digit of the telephone number is An IP telephone terminal that determines that it has been input, a call control device that performs call control of the IP telephone terminal, and final digit determination information that indicates information for determining the final number of digits of the telephone number from the higher-order telephone number An IP telephone system including a distribution device that distributes to the IP telephone terminal, wherein the distribution device stores a distribution destination storage unit that stores address information of the IP telephone terminal and a storage unit included in the call control device. When the last digit judgment information being updated is updated, the last digit judgment information cooperation function unit that receives the last digit judgment information from the call control device and the last digit judgment received by the last digit judgment information cooperation function unit information A final digit determination information distribution function unit that distributes the address information of the IP telephone terminal read from the distribution destination storage unit as a destination, and the IP telephone terminal stores a final digit determination information storage unit that stores final digit determination information; A final digit judgment information receiving function unit that receives final digit judgment information from the distribution device and writes the final digit judgment information in the final digit judgment information storage unit, and the final digit judgment information every time a destination telephone number is input Refers to the last digit judgment information in the storage unit to determine whether the last digit number has been determined. If the final digit number has not been determined, whether the final digit number has been determined by receiving the telephone number of the next digit When the last digit determination function unit that repeats the determination and the phone number of the last digit number determined by the last digit determination function unit is input, the input phone number is set before the expiration of the inter-digit timer. Call activation request signal And a sending function unit for transmitting to the logger controller, an IP telephone system, characterized in that.

  In addition, the present invention is the IP telephone system described above, wherein the last digit determination information distribution function unit distributes only the difference of the last digit determination information by update.

  Further, the present invention is the above-described IP telephone system, wherein the last digit determination information distribution function unit transmits a change notification with the address information of the IP telephone terminal read from the distribution destination storage unit as a destination, and the change The final digit judgment information is returned when a data request is received from the IP telephone terminal in response to the notification.

  The present invention also includes an interdigit timer that is activated each time a destination telephone number is entered, and determines that the last digit of the telephone number has been entered when the interdigit timer expires. The terminal, a call control device for performing call control of the IP telephone terminal, and final digit judgment information indicating information for judging the final number of telephone numbers from the higher digit telephone number are distributed to the IP telephone terminal The IP telephone terminal in the IP telephone system including a distribution device, which is read from a final digit determination information storage unit that stores final digit determination information and a storage unit included in the call control device from the distribution device Receiving the updated final digit judgment information and writing the final digit judgment information storage unit into the final digit judgment information storage unit, and the final digit judgment information every time a destination telephone number is input Last digit in storage Refer to the connection information to determine whether the final number of digits has been determined. If the final number of digits has not been determined, repeat the determination of whether the final number of digits has been determined by receiving the telephone number of the next digit. When there is an input of a digit determination function unit and a telephone number of the final number of digits determined by the final digit determination function unit, a call activation request signal in which the input telephone number is set before the expiration of the inter-digit timer An IP telephone terminal comprising: a transmission function unit that transmits a message to the call control device.

  The present invention also includes an interdigit timer that is activated each time a destination telephone number is entered, and determines that the last digit of the telephone number has been entered when the interdigit timer expires. The terminal, a call control device for performing call control of the IP telephone terminal, and final digit judgment information indicating information for judging the final number of telephone numbers from the higher digit telephone number are distributed to the IP telephone terminal A final digit determination method used in an IP telephone system including a distribution device, wherein the distribution device is configured to update the final digit determination information stored in a storage unit included in the call control device. IP phone that has read the digit determination information received from the call control device from the distribution destination storage unit included in the distribution device, and the final digit determination information cooperation process that receives the digit determination information from the call control device. A final digit determination information distribution process for distributing the address information at the end as the destination, and the IP telephone terminal receiving the final digit determination information from the distribution device and writing the final digit determination information in the final digit determination information storage unit of the IP telephone terminal The process of receiving the digit judgment information and every time when the destination telephone number is entered, it is judged whether the final digit number is determined by referring to the last digit judgment information in the last digit judgment information storage unit. If the number is not determined, the final digit determination process that repeats the determination of whether the final digit number has been determined by receiving the input of the telephone number of the next digit, and the telephone number of the final digit number determined in the final digit determination process And a call origination process for transmitting a call activation request signal in which the inputted telephone number is set to the call control device before expiration of the inter-digit timer. Is the method.

  The present invention also includes an interdigit timer that is activated each time a destination telephone number is entered, and determines that the last digit of the telephone number has been entered when the interdigit timer expires. The terminal, a call control device for performing call control of the IP telephone terminal, and final digit judgment information indicating information for judging the final number of telephone numbers from the higher digit telephone number are distributed to the IP telephone terminal A computer program used for the IP telephone terminal in an IP telephone system comprising a distribution device, wherein the updated final digit judgment information read from the storage unit of the call control device is received from the distribution device The final digit number is determined with reference to the final digit judgment information in the final digit judgment information storage unit every time the destination telephone number is input and one digit is input to the final digit judgment information storage unit. If the final number of digits is not determined, there is a step that repeats the determination of whether the final number of digits has been determined by receiving the input of the next digit's telephone number and the input of the telephone number of the final number of digits. In this case, the computer program causes the computer to execute a step of transmitting a call activation request signal in which the inputted telephone number is set to the call control device before the expiration of the inter-digit timer.

  According to the present invention, the IP telephone terminal determines the final number of digits of the destination telephone number using the latest final digit determination information, and sends the call activation request signal without waiting for the expiration of the inter-digit timer. Therefore, connection delay when using an IP phone can be reduced. In addition, although the station data of the call control device such as routing information is periodically changed, the latest final digit determination information updated by this change is distributed from the distribution device to the IP telephone terminal. Therefore, it is possible to easily set the latest final digit determination information in the IP telephone terminal without having to operate. In addition, since a server for setting user information in the IP telephone terminal from the network side is often used, it is possible to use the function.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an overall configuration diagram of an IP (Internet Protocol) telephone system according to an embodiment of the present invention. In the figure, a call control device 1, a distribution device 2, and an IP telephone terminal are connected to a network N that is an IP network. Here, the user's IP telephone terminal is composed of a VoIP-TA (Voice over IP Terminal Adapter) 3 and a telephone terminal 4, but the VoIP-TA 3 and the telephone terminal 4 are composed of a single device. Alternatively, a VoIP router may be used instead of VoIP-TA.

FIG. 2 is a block diagram showing an internal configuration of the call control device 1, and only functional blocks related to the present invention are extracted and shown. The call control device 1 is a SIP server that performs call control of an IP telephone using SIP (Session Initiation Protocol), and includes a communication unit 11, an input unit 12, a storage unit 13, an information transmission unit 14, and a call control unit 15. .
The communication unit 11 transmits and receives data via the network N. The input unit 12 is a keyboard, a mouse, or the like for a user to input information. The storage unit 13 stores station data and the like used for routing at the time of call control. In the station data, the final number of digits of the telephone number is determined from the upper digits of the telephone number. Last digit determination information indicating information is included. The information transmission unit 14 reads the final digit determination information in the storage unit 13 and transmits it to the distribution device 2. The call control unit 15 performs call control of the IP phone based on the SIP signal received from the IP phone terminal and the station data in the storage unit 13.

FIG. 3 is a block diagram showing an internal configuration of the distribution apparatus 2, and only functional blocks related to the present invention are extracted and shown. The distribution device 2 distributes the updated final digit determination information to the IP telephone terminal, and is realized by a computer device such as a server, for example. The distribution apparatus 2 includes a communication unit 21, a final digit determination information cooperation function unit 22, a distribution information storage unit 23, a final digit determination information distribution function unit 24, and a distribution destination storage unit 25.
The communication unit 21 transmits and receives data via the network N. When the last digit judgment information stored in the storage unit 13 of the call control device 1 is updated, the last digit judgment information cooperation function unit 22 reads the last digit judgment information from the call control device 1 and stores the distribution information. Write to part 23. The final digit determination information distribution function unit 24 distributes the final digit determination information stored in the distribution information storage unit 23 using the address information of the IP telephone terminal stored in the distribution destination storage unit 25 as a destination.

  In the above description, the call control device 1 and the distribution device 2 are different devices, but the call control device 1 and the distribution device 2 may be configured by the same device.

FIG. 4 is a block diagram showing the internal configuration of VoIP-TA 3, and only functional blocks related to the present invention are extracted and shown. The VoIP-TA 3 includes a communication unit 31, a last digit determination information reception function unit 32, a last digit determination information storage unit 33, a number input unit 34, an interdigit timer 35, a last digit determination function unit 36, and a transmission function unit 37. Prepare.
The communication unit 31 transmits and receives data via the network N and transmits and receives signals to and from the telephone terminal 4. The last digit judgment information receiving function unit 32 receives the last digit judgment information from the distribution device 2 and writes it in the last digit judgment information storage unit 33. The number input unit 34 receives from the telephone terminal 4 a destination telephone number input to the telephone terminal 4. The interdigit timer 35 is a timer that is activated every time a destination telephone number is entered, and it is determined that the entry of the telephone number has been completed when it expires. The final digit determination function unit 36 refers to the final digit determination information in the final digit determination information storage unit 33 and determines the final number of digits from the higher digits of the input destination telephone number. When the telephone number of the final number determined by the final digit determining function unit 36 is input, the transmission function unit 37 sets the telephone number that has been input so far before the inter-digit timer 35 expires. An activation request signal (SIP INVITE signal) is notified to the call control device 1.

FIG. 5 is a diagram showing a final digit judgment information distribution processing sequence in the IP telephone system.
When the last digit judgment information is changed, the maintenance person inputs new last digit judgment information by the input unit 12 of the call control device 1, or another computer device or computer connected via the network. An instruction to read new final digit judgment information from the readable recording medium is input, and the final digit judgment information in the storage unit 13 is updated.
The last digit judgment information cooperation function unit 22 of the distribution device 2 is used to confirm whether the last digit judgment information has been changed in the call control device 1 periodically or when an instruction from a maintenance person is input. An inquiry signal is transmitted (step S101). When receiving the inquiry signal from the distribution device 2, the information transmission unit 14 of the call control device 1 determines whether or not the last digit determination information has been changed. This is, for example, determined based on whether the update time of the last digit determination information held in the storage unit 13 is after the time when the previous inquiry signal is received, or when the last digit determination information is updated. An ON flag is stored in the storage unit 13 so that OFF is set when the updated last digit determination information is transmitted to the distribution apparatus 2, and the determination may be made based on the update flag. Good.

  When the last digit determination information is not updated, the information transmission unit 14 of the call control device 1 returns a response signal in which information indicating no change is set. On the other hand, when the last digit judgment information is updated, the updated last digit judgment information is read from the storage unit 13, and a response signal in which information indicating that there is a change and the read last digit judgment information is set is distributed. It returns to the apparatus 2 (step S102). When setting the final digit determination information in the response signal, only the difference due to the change may be set, or all the final digit determination information may be set. When the response signal received from the call control device 1 is set with information indicating that there is a change, the final digit determination information cooperation function unit 22 of the distribution device 2 acquires the final digit determination information updated from the response signal. To the distribution information storage unit 23.

  Subsequently, the final digit determination information distribution function unit 24 of the distribution apparatus 2 transmits a change notification with the address of the IP telephone terminal device of the distribution destination read from the distribution destination storage unit 25 as a destination (step S103). When receiving the change notification, the last digit determination information receiving function unit 32 of VoIP-TA3 returns a data request (step S104). When receiving the data request from VoIP-TA 3, the last digit determination information distribution function unit 24 of the distribution device 2 reads and returns the updated last digit determination information from the distribution destination storage unit 25 (step S 105). The last digit judgment information of the difference due to the change is transmitted to VoIP-TA3, but all the last digit judgment information may be distributed. The last digit judgment information reception function unit 32 of VoIP-TA3 writes the received last digit judgment information to the last digit judgment information storage unit 33, and updates the last digit judgment information currently held.

  In the above, an update inquiry is made from the distribution device 2 to the call control device 1, but the inquiry from the distribution device 2 is not made, and the final digit judgment information in the storage unit 13 of the call control device 1 is updated. In such a case, the information transmission unit 14 may autonomously transmit the updated final digit determination information to the distribution device 2.

FIG. 6 is a diagram showing a call processing sequence in the IP telephone system.
The calling user inputs the first digit of the called number (“0” in the figure) to the telephone terminal 4. When the number input unit 34 of the VoIP-TA 3 receives the input first digit number from the telephone terminal 4, it starts the interdigit timer 35. When the last digit determination function unit 36 stores the number of the first digit received by the number input unit 34 in the storage unit, the last digit determination function unit 36 refers to the last digit determination information in the last digit determination information storage unit 33 and uses this first number to determine the final digit. Determine whether the number of digits is determined. If the last digit is not determined, wait for the next number.

  Subsequently, the calling user inputs the second digit of the called number ("6" in the figure) to the telephone terminal 4 before the expiration of the inter-digit timer 35 of VoIP-TA3. When the number input unit 34 of the VoIP-TA 3 receives the input second digit number from the telephone terminal 4, it resets the interdigit timer 35 (step S201). When the last digit determination function unit 36 stores the number of the second digit received by the number input unit 34 in the storage unit, the last digit determination function unit 36 refers to the last digit determination information in the last digit determination information storage unit 33 and stores the number up to the second digit. It is determined whether or not the final number of digits is determined by the number. When the final digit number is determined, the final digit determination function unit 36 stores the determined final digit number in the storage unit (step S202).

  Further, the calling user inputs the third and subsequent digits of the called number to the telephone terminal 4 before the expiration of the inter-digit timer 35 of VoIP-TA3. The number input unit 34 of the VoIP-TA 3 resets the interdigit timer 35 every time the input number is received from the telephone terminal 4, and the final digit determination function unit 36 stores the input called number in the storage means. The number of digits of the inputted called number is counted (step S203). When VoIP-TA 3 receives the last digit, that is, the last digit determination function unit 36 recognizes that the last digit number stored in the storage means matches the digit number of the input called number. If so (step S204), the calling function unit 37 reads the called number input from the storage means, and immediately sends the called number without waiting for the inter-digit timer 35 to expire (step S205). As a result, the calling function unit 37 transmits to the call control device 1 an INVITE signal (SIP call activation request signal) in which the destination information generated by adding the specific domain to the called number is set in the To field ( Step S206).

  When receiving the INVITE signal, the call control unit 15 of the call control device 1 refers to the station data in the storage unit 13 and makes a call connection to the destination user's IP telephone terminal indicated by the To field. When the call is normally received, the call control unit 15 returns 180 Ringing to the VoIP-TA 3 (step S207), and the VoIP-TA 3 sends a ringing sound (RBT) to the telephone terminal 4 (step S208).

  Note that the calling function unit 37 of the VoIP-TA 3 does not stop the inter-digit timer 35 when the inter-digit timer 35 expires even if the number of digits of the input called number is less than the final number of digits stored in the storage means. , Make a call using the input called number.

FIG. 7 is a diagram illustrating a data example of final digit determination information held in the final digit determination information storage unit 33 of VoIP-TA3. As shown in the figure, the final digit judgment information includes the area code of the terminal and the number of the area code, the area code other than the terminal, the special number, and the routing number and the number of digits. Holding.
When the user subscribes to an IP telephone service that can use only an outside line, the number of final digits is determined with reference to the information shown in FIG. In addition, when the user subscribes to an IP telephone service that can use an internal line and an external line (0 transmission), and the first digit of the input telephone number is 0, the same information is referred to and the final Perform digit judgment.

FIG. 8 is a diagram illustrating an example of the final digit number determination logic in the final digit determination function unit 36 of VoIP-TA3 using the data illustrated in FIG. All or part of the determination logic itself may be information constituting final digit determination information. It is assumed that the number of digits of a general telephone number is 10 digits.
As shown in the figure, when the first digit of the number dialed by the calling user is “0”, the final digit number is not yet determined, and the input of the second digit is awaited. When the second digit is “0”, it can be seen that this is the last digit judgment information routing operator code (four digits) shown in FIG. Therefore, the final digit determination function unit 36 determines that the total number of digits of the called telephone number 10 digits and the number of digits of the operator code 4 digits, that is, 14 digits is the final digit number.
When the first digit is “0” and the second digit is “1”, the final digit judgment information shown in FIG. 7 indicates that it is the telephone number or the area code for the caller billing service. The number of digits is determined to be 10 digits.

On the other hand, when the first digit is “1”, it is determined that the final digit number is 3 because the communication is to the special number. Alternatively, when the first digit is “1”, the final digit number may be determined by the third digit. For example, if the number up to the third digit matches one of the special number registered in the last digit judgment information shown in FIG. 7, the number is immediately transmitted, and if it does not match, the interdigit timer expires. You may make it wait. This is based on the case where the originating user forgets to dial the external line identification number “0” and tries to dial the area code starting with “01” in the IP telephone service that judges that the line is an outside line by 0 transmission. It is.
In addition, since the first digit is other than “0” and “1”, it is an intra-office number, so the local area of the terminal registered in the final digit judgment information shown in FIG. Subtract 4 station number digits and determine that the final digit number is 6 digits.

  When the user subscribes to an IP telephone service that can use an extension and an outside line (0 transmission) and the first digit of the called number is other than 0, the last digit determination function unit 36 of the VoIP-TA 3 The number of final digits is determined by the extension number determination logic, and the calling function unit 37 connects to the registered extension number.

  The above is an example of the final digit judgment. As another final digit judgment method, the final digit judgment information is associated with the number of the upper digit and the final digit number when the number is held in the upper digit. There is one that obtains the information of the last digit number associated with the matching number only when it matches by looking at the match from the first digit of the input telephone number.

  According to the above embodiment, when the last digit of the destination telephone number is input, the VoIP-TA 3 can transmit the call activation request signal to the call control device 1 without waiting for the expiration of the interdigit timer. After the dialing of the called number, the calling user can be notified of the RBT at an early timing by the inter-digit timer. Normally, the station data included in the call control device 1 is periodically changed. At this time, the latest final digit determination information changed can be distributed from the distribution device 2 to the IP telephone terminal. The latest final digit determination information can be set in VoIP-TA3 without the user's operation. In commercial services, a server for setting user information from the network side to the IP telephone terminal is often used. Therefore, the distribution device 2 can distribute the final digit determination information using the function of the server. Is possible.

  Note that the call control device 1, the distribution device 2, and the VoIP-TA 3 have a computer system therein. And the information transmission part 14 and the call control part 15 of the call control apparatus 1 mentioned above, the last digit judgment information cooperation function part 22 and the last digit judgment information delivery function part 24 of the delivery apparatus 2, and the last digit judgment of VoIP-TA3 The operation processes of the information reception function unit 32, the number input unit 34, the last digit determination function unit 36, and the transmission function unit 37 are stored in a computer-readable recording medium in the form of a program. The above processing is performed by the system reading and executing. Here, the computer system includes a CPU, various memories, an OS, and hardware such as peripheral devices.

Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
The “computer-readable recording medium” refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, and a CD-ROM, and a storage device such as a hard disk built in the computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

1 is a diagram showing an overall configuration of an IP telephone system according to an embodiment of the present invention. It is a functional block diagram of a call control device according to the embodiment. It is a functional block diagram of the delivery apparatus by the embodiment. It is a functional block diagram of VoIP-TA by the embodiment. It is a figure which shows the last digit judgment information delivery processing sequence of the IP telephone system by the embodiment. It is a figure which shows the call processing sequence of the IP telephone system by the embodiment. It is a figure which shows the example of a data structure of the last digit judgment information hold | maintained by VoIP-TA by the embodiment. It is a figure which shows the example of the last digit number determination logic in VoIP-TA by the embodiment. It is a figure which shows the call processing sequence of the conventional IP telephone system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Call control apparatus 2 ... Distribution apparatus 3 ... VoIP-TA
DESCRIPTION OF SYMBOLS 4 ... Telephone terminal 11, 21, 31 ... Communication part 12 ... Input part 13 ... Memory | storage part 14 ... Information transmission part 15 ... Call control part 22 ... Final digit judgment information cooperation function part 23 ... Distribution information storage part 24 ... Final digit judgment Information distribution function unit 25 ... distribution destination storage unit 32 ... final digit determination information reception function unit 33 ... final digit determination information storage unit 34 ... number input unit 35 ... interdigit timer 36 ... final digit determination function unit 37 ... transmission function unit

Claims (6)

An IP telephone terminal that includes an interdigit timer that is activated each time a destination telephone number is input, and determines that the final digit of the telephone number has been input when the interdigit timer expires; An IP comprising: a call control device that performs call control of a terminal; and a distribution device that distributes final digit determination information indicating information for determining the final number of digits of a telephone number from a higher digit telephone number to the IP telephone terminal A telephone system,
The distribution device includes:
A delivery destination storage unit for storing address information of the IP telephone terminal;
When the last digit judgment information stored in the storage unit included in the call control device is updated, the last digit judgment information cooperation function unit that receives the last digit judgment information from the call control device;
A final digit determination information distribution function unit that distributes the final digit determination information received by the final digit determination information cooperation function unit with the address information of the IP telephone terminal read out from the distribution destination storage unit as a destination;
The IP telephone terminal
A final digit determination information storage unit for storing final digit determination information;
Receiving the final digit determination information from the distribution device, and writing the final digit determination information storage unit to the final digit determination information storage unit;
When each destination telephone number is entered, it is determined whether the final digit number is determined by referring to the final digit determination information in the final digit determination information storage unit, and the final digit number is not determined. Furthermore, a final digit determination function unit that repeats the determination of whether the final number of digits has been determined by receiving the telephone number of the next digit,
When a telephone number having the final number of digits determined by the final digit determining function unit is input, a call activation request signal in which the input telephone number is set is transmitted to the call control device before the interdigit timer expires. A transmission function unit for transmitting,
An IP telephone system characterized by the above.   The IP telephone system according to claim 1, wherein the last digit determination information distribution function unit distributes only the difference of the last digit determination information by update.   The last digit determination information distribution function unit transmits a change notification with the address information of the IP phone terminal read from the distribution destination storage unit as a destination, and receives a data request from the IP phone terminal in response to the change notification 3. The IP telephone system according to claim 1, wherein the final digit judgment information is returned. An IP telephone terminal that includes an interdigit timer that is activated each time a destination telephone number is input, and determines that the final digit of the telephone number has been input when the interdigit timer expires; An IP comprising: a call control device that performs call control of a terminal; and a distribution device that distributes final digit determination information indicating information for determining the final number of digits of a telephone number from a higher digit telephone number to the IP telephone terminal The IP telephone terminal in the telephone system,
A final digit determination information storage unit for storing final digit determination information;
A final digit determination information receiving function unit that receives updated final digit determination information read from the storage unit included in the call control device and writes the final digit determination information storage unit from the distribution device;
When each destination telephone number is entered, it is determined whether the final digit number is determined by referring to the final digit determination information in the final digit determination information storage unit, and the final digit number is not determined. Furthermore, a final digit determination function unit that repeats the determination of whether the final number of digits has been determined by receiving the telephone number of the next digit,
When a telephone number having the final number of digits determined by the final digit determining function unit is input, a call activation request signal in which the input telephone number is set is transmitted to the call control device before the interdigit timer expires. A transmission function unit to transmit;
An IP telephone terminal comprising: An IP telephone terminal that includes an interdigit timer that is activated each time a destination telephone number is input, and determines that the final digit of the telephone number has been input when the interdigit timer expires; An IP comprising: a call control device that performs call control of a terminal; and a distribution device that distributes final digit determination information indicating information for determining the final number of digits of a telephone number from a higher digit telephone number to the IP telephone terminal A final digit determination method used in a telephone system,
The delivery device is
When the last digit judgment information stored in the storage unit provided in the call control device is updated, the last digit judgment information cooperation process for receiving the last digit judgment information from the call control device;
A final digit determination information distribution process for distributing the final digit determination information received in the final digit determination information cooperation process with the address information of the IP telephone terminal read out from the distribution destination storage unit included in the distribution device as a destination;
The IP telephone terminal is
Receiving final digit judgment information from the distribution device and writing to the final digit judgment information storage unit provided in the IP telephone terminal;
When each destination telephone number is entered, it is determined whether the final digit number is determined by referring to the final digit determination information in the final digit determination information storage unit, and the final digit number is not determined. In addition, a final digit determination process that repeats the determination of whether the final number of digits has been determined by receiving the telephone number of the next digit,
When a telephone number having the final number of digits determined in the final digit determining process is input, a call activation request signal in which the input telephone number is set is transmitted to the call control device before the interdigit timer expires. Outgoing process,
The final digit judging method characterized by having. An IP telephone terminal that includes an interdigit timer that is activated each time a destination telephone number is input, and determines that the final digit of the telephone number has been input when the interdigit timer expires; An IP comprising: a call control device that performs call control of a terminal; and a distribution device that distributes final digit determination information indicating information for determining the final number of digits of a telephone number from a higher digit telephone number to the IP telephone terminal A computer program used for the IP telephone terminal in a telephone system,
Receiving updated final digit judgment information read from the storage unit included in the call control device from the distribution device and writing it to the final digit judgment information storage unit;
When each destination telephone number is entered, it is determined whether the final digit number is determined by referring to the final digit determination information in the final digit determination information storage unit, and the final digit number is not determined. Repeatedly determining whether the final number of digits has been determined by receiving the phone number of the next digit,
If there is an input of the last digit number telephone number, before the expiration of the interdigit timer, transmitting a call activation request signal in which the input telephone number is set to the call control device;
A computer program for causing a computer to execute.

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