JP2006165817A - Network terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a network terminal for efficiently confirming the communication of a telephone. <P>SOLUTION: As a network terminal PCx4 and 5 to be tested are provided with telephone functions, and those PCx4 and 5 can be connected through the Internet 6 to a PCa3 for a test for transmitting a calling telegraphic message showing that a test mode for a connection test is set, and when receiving the calling telegraphic message showing that the test mode is set from the PCa3, the PCx4 and 5 return unique setting information related with the telephone functions as an incoming response telegraphic message to the PCa3. The PCa3 is configured to transmit a calling sound for a test, and when receiving the calling sound for a test from the PCa3, the PCx4 and 5 return a calling sound for a test to the Pca3. The PCa3 performs the verification processing of a test result based on the these pieces of information. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a network terminal connected to a network, and more particularly to a network terminal such as a personal computer (PC) having a telephone function such as an IP telephone capable of communicating via a network such as the Internet.

  Conventionally, as a telephone, a general telephone connected to an exchange network via an exchange is popular. However, recently, network terminals such as PCs having a telephone function such as an IP telephone that can communicate via a network such as the Internet have become widespread. This type of network terminal includes SIP and H.264. The telephone exchange is performed via the server device using the H.323 protocol or the like.

  In the installation of a general telephone, first, for the confirmation of the call, the person in charge of the telephone company goes to the installation destination and confirms the communication by making an opposite connection with the exchange side. On the other hand, in a network terminal such as an IP telephone, it is necessary to install software that gives a telephone function to a PC or to perform complicated settings such as a user ID, a telephone number, an IP address, and a password. Also in this case, in the final confirmation after the software installation and setting work, the opposite test is also performed, and the communication confirmation is performed by calling a desired telephone from any telephone. For this reason, for example, when a conventional business unit replaces an existing analog line network with an IP telephone network, a connection test between bases is performed by mobilizing workers. In such a telephone replacement work in such a business entity, the number of telephones is large, and the separation work when communication is not possible via the Internet becomes complicated, and a large number of man-hours are required for the separation.

Technologies related to telephone installation include the following. For example, Patent Document 1 discloses a method for automatically monitoring a trunk of a communication system without using an operator. The method selects a trunk to test, sends a test message through the selected trunk and detects a response message to determine whether the selected trunk is idle, According to the selection algorithm, the next trunk to be tested is determined. Patent Document 2 discloses an apparatus in which when a telephone number of an automatic machine in a store where an automatic machine such as an ATM is installed is changed, the telephone number is reflected in a database without error. In this apparatus, when the telephone number of the automatic machine is changed, a caller notification is sent to the monitoring center server apparatus, and the database is corrected and updated based on the caller number.
JP 2000-209339 A JP 2002-99718 A

  In a network terminal equipped with an IP telephone or the like, setting of a user ID, a telephone number, an IP address, a password, etc. is required in both the server device and the network terminal in setting up a telephone directory database. For this reason, when a setting mistake or a setting mismatch occurs, it is natural that the telephone cannot be communicated. In addition, since the network terminal is connected via the Internet, if it becomes impossible to communicate due to a change in equipment or route on the way, much time and man-hours are required for the separation work.

  Accordingly, an object of the present invention is to provide a network terminal that can solve the above-described problems and can improve the efficiency of the work in confirming communication of a telephone.

  The object is a network terminal having a telephone function that can be connected to a test terminal that transmits a call message indicating a test mode for a connection test via a network, from the test terminal to the test This is achieved by a network terminal that returns a setting information specific to the telephone function as an incoming response message to the test terminal when a call message indicating the mode is received. Here, the test terminal can further transmit a test dial tone, and when the network terminal receives the test dial tone from the test terminal, the test terminal transmits the test dial tone to the test terminal. You can reply.

The network terminal according to the present invention transmits a call message indicating a test mode for a connection test to a terminal under test having a telephone function via the network. Receiving unique setting information related to the telephone function as an incoming call response message from the terminal, and determining the validity of the connection of the terminal under test based on the received setting information and the setting information registered in advance. is there. Here, the network terminal further transmits a test dial tone to the terminal under test, and determines whether the connection of the terminal under test is good based on the test dial tone returned from the terminal under test. can do.
Furthermore, the network terminal according to the present invention is provided with a telephone function and a location acquisition means that can be connected via a network to a test terminal that transmits a call message indicating that it is a test mode for connection test. When receiving a call message indicating the test mode from the test terminal, the position information acquired by the position acquisition unit is returned as an incoming response message to the test terminal.
Further, the network terminal according to the present invention transmits a calling telegram indicating that it is a test mode for a connection test via a network to a terminal to be tested having a telephone function and a position acquisition unit, The location information acquired by the location acquisition means as an incoming response message from the terminal under test is received, and the validity of the connection of the terminal under test is verified based on the received location information and location information registered in advance. Judgment.

The program according to the present invention relates to the test mode, a function for determining whether or not the message is related to a test mode for connection test when a network terminal having a telephone function receives the message via the network. A function for determining whether or not the message is related to a call, and a function for returning a setting information specific to the telephone function as an incoming call response message when the call is related to a call. Is.
The program according to the present invention includes a function for transmitting a call message indicating a test mode for connection test to a network terminal having a telephone function via the network, and the telephone as an incoming response message from the network terminal. A function for receiving unique setting information related to the function, and a function for judging the validity of the connection of the network terminal based on the received setting information and the setting information registered in advance. is there.

According to the present invention, a network terminal having the following effects can be obtained.
(1) It is possible to improve the efficiency of the connection confirmation work in the telephone communication confirmation.
(2) It is possible to improve the efficiency of the voice quality confirmation work in the telephone communication confirmation.
In the present invention, communication test operations such as connection confirmation and voice quality check are automated by sequentially transmitting from a test network terminal using a telephone number to be tested. As a result, through the communication facing test, first, it is possible to improve the efficiency and reduce the number of man-hours for confirming whether a dialed telephone number is definitely transmitted to a required telephone. Similarly, it is possible to improve the efficiency of the voice level confirmation work and reduce the number of man-hours by using the test voice by the communication facing test.

  Hereinafter, an embodiment of a network terminal according to the present invention will be described with reference to the drawings. In this embodiment, a personal computer (PC) having an IP telephone function will be described as an example of a network terminal.

  FIG. 1 is a diagram showing a configuration example of a network system including a PC according to the present invention. In this network system, as shown in the figure, SIP (Session Initiation Protocol) server devices 1 and 2, routers 7 and 8, and server devices 1 and 2 and routers 7 and 8 are connected to each other via a local area network (LAN). The plurality of PCa3, PCx4, and PCy5 and the Internet 6 that connects the routers 7 and 8 are provided.

  In FIG. 1, routers 7 and 8 are devices for interconnecting the LAN and the Internet 6 respectively. The SIP server devices 1 and 2 have a SIP server function and the like. The SIP server means a server that controls telephone functions such as calling, connection, and disconnection from an IP telephone. Further, PCa3, PCx4, and PCy5 as network terminals have an IP telephone function and the like, and can be connected via the Internet 6.

  That is, in the present invention, PCx4 and PCy5 have a telephone function, and can be connected to PCa3 that transmits a call message indicating that it is a test mode for connection test via the Internet 6. When a call message indicating that the call function is received is received, setting information specific to the telephone function is returned as an incoming response message to PCa3. The PCa3 can further transmit a test dial tone. When the PCx4 and PCy5 receive the test dial tone from the PCa3, the PCa3 returns the test dial tone to the PCa3. On the other hand, the PCa3 transmits a calling message indicating that it is a test mode for connection test to the PCx4 and PCy5 via the Internet 6, and the setting information specific to each telephone function as an incoming response message from the PCx4 and PCy5. And the validity of the connection between PCx4 and PCy5 is determined based on the received setting information and setting information registered in advance. PCa3 further transmits a test dial tone to PCx4 and PCy5, and determines whether the connection between PCx4 and PCy5 is good based on the test dial tone returned from PCx4 and PCy5.

In the present invention, a network terminal such as PCa3, PCx4, or PCy5 has a test mode, so that the calling message and the incoming response message are set to be in the test mode, and the following functions are realized. The test mode shifts to the test mode depending on the settings for the screen and files.
(1) In the network terminal that has received the calling message indicating that it is in the test mode, the incoming call display is not shown, and various setting information of the incoming telephone is set in the incoming response message, and is returned to the calling side.
(2) Similarly, the network terminal that has received the calling message indicating that it is in the test mode returns a test voice message to the calling side without showing an incoming call display.
(3) Similarly, the network terminal that has received the calling message indicating that it is in the test mode does not display the incoming call. Next, when a test voice message is received, this test voice message is returned. Set it in a voice message and send it back to the calling party.

(4) Next, the network terminal that has transmitted the call message indicating the test mode receives various setting information of the incoming phone set in the incoming call response message.
(5) Similarly, the network terminal that has transmitted the call message indicating the test mode transmits a test voice message.
(6) Similarly, the network terminal that has transmitted the calling telegram indicating the test mode receives the returned test voice.
(7) A network terminal having a telephone function via a network, having a test mode for connection test, having a telephone directory list to be tested, sequentially reading out, and using the target telephone number , Make a call, receive various setting information of the incoming telephone set in the incoming call response message, and check the validity of the various setting information.
(8) A network terminal having a telephone function via a network, having a test mode for connection test, having a telephone directory list to be tested, sequentially reading out, and using the target telephone number , Make a call, receive the returned test voice, and check the validity of the test voice. Details of these will be described later. Before that, first, a configuration example of functional blocks including software and hardware of the PC and SIP server will be described.

  FIG. 2 is a diagram showing functional blocks including software and hardware of a PC (PCa3, PCx4, PCy5). As illustrated, the PC includes a communication control unit 301, a telephone control unit 302 and a mail control unit 303 connected to the communication control unit 301, an operation control unit 304 connected to the telephone control unit 302 and the mail control unit 303, and an operation. An input / output control unit 305 connected to the control unit 304 and a hard disk 315 connected to the input / output control unit 305 are provided. An IP telephone handset 310, a keyboard 311, and a display 312 are connected to the input / output control unit 305.

  Here, the communication control unit 301 controls the LAN, the TCP / IP protocol, and the like. The telephone control unit 302 controls the IP phone, and the mail control unit 303 controls the electronic mail. The operation control unit 304 controls the GUI screen using a keyboard, a mouse, or the like. The input / output control unit 305 controls input from the handset, keyboard, database, and the like and input / output to the handset, display, and hard disk. The hard disk 315 stores a database, a table, and a program.

  FIG. 3 is a diagram illustrating functional blocks including software and hardware of the SIP server apparatuses 1 and 2. As illustrated, the SIP server device includes a communication control unit 101, a message transmission / reception processing unit 102 connected to the communication control unit 101, a message relay processing unit 103 connected to the message transmission / reception processing unit 102, and a message relay processing unit 103. A hard disk 104 connected to the. Here, the communication control unit 101 controls the LAN, TCP / IP protocol, and the like. The message transmission / reception processing unit 102 performs message transmission / reception control. The message relay processing unit 103 performs message relay processing. The hard disk 104 stores a database, a table, and a program.

  FIG. 4 is a diagram showing an example of a telephone operation screen on the PC (PCa3, PCx4, PCy5). The telephone operation screen 320 includes a telephone number input area 321, a display area 322 for displaying a control state such as outgoing and incoming calls, a number / symbol button 323 for inputting telephone numbers and the like, an outgoing / incoming button 324 for performing outgoing and incoming operations, A plurality of control buttons 326 including a disconnect button 325 for disconnecting a call and a button for entering a test mode are provided. In general, when making a call, first, a numeric keypad is input from the number / symbol button 323, and then the call / incoming button 324 is pressed. Further, when the control button 326 has a button for setting the test mode and the mode is shifted to the test mode, an automatic transmission test can be performed from the telephone number list of a predetermined target person without manually inputting as described above. The result is displayed in the display area 322 while sequentially scrolling. Here, the method of entering the test mode may be performed by inputting a predetermined key from the number / symbol button 323.

  FIG. 5 is a diagram showing an example of a telephone directory database 1100 provided in the hard disk 104 of the SIP server apparatus 1 or 2. As shown in the figure, the telephone directory database 1100 includes a telephone number 1101, a name 1102, a URI (Universal Resource Identifier) 1103 in SIP, and a presence status (attended / not present) 1104. Here, the URI 1103 indicates a logical destination of the IP phone. This URI is expressed by a combination of an IP address or a symbol name, and the final destination IP phone (PC) can be specified. The presence status 1104 is updated by a signal from the IP telephone (PC) during a certain period.

  FIG. 6 is a diagram showing an example of the test target address list 3300 provided in the hard disk 315 of the PC. This table (test target address list 3300) is obtained by extracting the address of the IP telephone (PC) to be tested from the telephone directory database 1100. As shown in the figure, the telephone number 3301, name 3302, URI 3303, and general A test result 3304 is provided. The comprehensive test result 3304 is set as OK or NG, for example. In general, before starting the test, the telephone directory database 1100 is downloaded from the PC, and then the test target address list 3300 is created to start the test. In general, this table can be shared with the database in the server device by adding the comprehensive test result 3304 to the telephone directory database 1100 when all addresses are targeted.

  FIG. 7 is a flowchart showing a processing example when the communication connection test is sequentially performed from the test PCa3 to the test target PCx4 and the like via the SIP server apparatuses 1 and 2. First, when the test mode is set on the test PCa3 (S701), the test target address list 3300 is read (S702), and a test transmission process is performed on the test target PCx4 and others (S703). Note that the test target address list 3300 may be prepared in advance, or may be automatically created from this data by downloading the telephone directory database 1100 of the SIP server device 1 here.

The outgoing call message (730) from the test PCa3 is relayed by the SIP server apparatuses 1 and 2 (S711) and sent to the test PCx4.
The PC under test 4x4 having received the outgoing call message (731) from the server device performs incoming call response processing in the test mode (S721), and returns the incoming call message (732) to the test PCa3. The server apparatus that has received the incoming message performs a relay process (S711), and transmits the incoming message (733) to the test PCa3.

  The test PCa3 that has received the incoming telegram (733) performs a test incoming response reception process (S704), and then performs a test voice transmission process (S705), and sends a test dial tone (734) to the PCx4 under test. ). The PCx4 to be tested that has received the test dial tone (734) in the test mode connection state (S722) transmits a test reply tone (735) to the test PCa3. In this case, generally, the received test sound is returned and returned. This voice transmission / reception is performed without going through the SIP server apparatuses 1 and 2 in order to respect real-time characteristics. Here, “voice” is used as the test dial tone, but “sound” different from the voice may be used. The same applies hereinafter.

  The test PCa3 that has received the test reply sound performs a disconnection process of transmitting a disconnect message (736) to the PCx4 to be tested (S706). The disconnection message (736) is relayed by the SIP server devices 1 and 2 (S711) and sent to the PC under test x4.

  The PC under test 4 that has received the disconnect message (737) performs a test disconnection process (S723), and the process ends. On the other hand, the test PCa3 that has performed the disconnection process (S706) stores the reply sound data in the incoming call result database (S707), and performs the test result verification process (S708). Then, it is determined whether or not all the test target address lists are completed (S709). If the list is completed, the test is terminated. If the list is not terminated, the process returns to S702 and the test is repeated.

  FIG. 8 shows a format example of a message transmitted and received in FIG. As shown in the figure, this message includes a message transmission source IP address 801, a message reception destination IP address 802, a message transmission URI (FROM) 803, a message reception URI (TO) 804, and the like. A telephone conversation identification number (CALLID) 805 for preventing interference with conversation, a command 806 for calling, receiving, and disconnecting, and a body 807 for storing detailed contents of a message are provided. The body 807 can be set to be in the test mode.

FIG. 9 is a diagram illustrating an example of setting a message. This figure particularly shows a case where the test mode is set for the body 907. In this example, corresponding to each command (calling, incoming call, disconnection, etc.) 901, as shown in the figure, a message transmission side source IP address 902, a message reception side destination IP address 903, and a message transmission side, respectively. A URI (FROM) 904, a message receiving URI (TO) 905, a telephone conversation identification number (CALLID) 906, and a body 907 are set. This figure shows that each IP address is transferred to obtain the IP address of the next destination server device or PC each time it passes through. Here, although the example in which the test mode is set in the body 907 is shown, the command may be set and output as, for example, “test call”.
The PCx setting information set in the body 907 indicates a user ID (user name), password, extension telephone number, location (department), etc. set in the telephone under test (PC). Information for confirming whether the telephone is correctly installed is set. Furthermore, the URI of PCx set in FROM904 may be included. The URI is identification information of the telephone and is uniquely determined from information such as a user ID (user name), extension telephone number, location (department), and IP address so as not to overlap with other telephones. .

  FIG. 10 is a diagram showing an incoming call result database 1000 for registering incoming call results stored in the hard disk 315 of the PC. The incoming call result database 1000 stores a telephone number 1001, a name 1002, a URI 1003, and received reply sound data 1004 as shown in the figure. Among these, the name 1002, the URI 1003, and the reply sound data 1004 are received information. Here, the database 1000 may be integrated with the telephone directory database 1100. In this case, the result is stored in the server device.

  FIG. 11 is a flowchart showing an example of an incoming call response process in the PC under test 4x4. As shown in the figure, first, in S1101, it is determined whether or not the body 807 of the received message is in the “test mode”. If it is not the test mode, the process branches to a normal process (S1120) including ringing such as ringing the bell, and if it is the test mode, the process branches to S1102 without performing other actions such as ringing the bell. In step S1102, it is determined whether the electronic message command 806 is a call. If it is a call, it branches to S1103. If it is not a call, the process branches to S1110.

  If the message command 806 is a call, in step S1103, a message creation process is performed as follows. That is, “incoming call” is set in the command 806. “Test mode” and PCx setting information are set in the body 807. Other required fields are set according to FIG. In step S1104, the created message transmission process is performed, and the process ends.

  On the other hand, if the message command 806 is not a call, it is determined in step S1110 whether the command 806 is a test dial tone. If it is not a test dial tone, the process branches to S1113. On the other hand, if it is a test dial tone, the process branches to S1111. In S1111, “test reply tone” is set in the message command 807. In step S1112, the received test dial tone is set in the body 806 as loopback data, that is, a test reply tone. In step S1104, a created message transmission process is performed, and the process ends. As a result, it is possible to verify how the voice data is altered by passing through the Internet 6, and to determine the connection quality of the PCx to be tested. Instead of S1111 and S1112, test-dedicated audio data may be directly transmitted from the PCx4, and the test-dedicated audio data may be evaluated in the PCa3 that has received it.

  FIG. 12 is a flowchart illustrating an example of a test result verification process that verifies a test result and reflects the result on the comprehensive test result 3304 of the test target address list 3300. In this example, as shown in the figure, in S1200, each record of the telephone directory database 1100, the test target address list 3300, and the incoming result database 1000 is selected with the test target telephone number. In S1201, the name 3302 in the test target address list and the name 1002 in the telephone directory database are compared. If they match, the process branches to S1202. If not, the process branches to S1205. In S1202, “URI” in 3303 and 1003 are compared, and if they match, the process branches to S1203. If not, the process branches to S1205.

  In order to detect the comparison and determination in S1201 and S1202, since there are cases in which installation and setting are erroneous in an actual PC even if the overall address allocation or setting plan is determined in the in-house telephone directory database 1100 Done. In other words, even if the phone number is registered and connected, the case where the user has a different setting or the case where the user is connected to another person with the wrong IP address is detected by this comparison judgment. Will be.

  In S1203, the transmission sound and the reply sound are compared and evaluated. As a result of the comparison, if the evaluation is good, the process branches to S1204. If not good, the process branches to S1205. Here, in the audio comparison evaluation, not only simple data comparison, but also comprehensive evaluation may be performed in consideration of audio attenuation, distortion, delay, and the like. Based on the above results, “OK” is set in the comprehensive test result 3304 in S1204. On the other hand, in S1205, “NG” is set in the comprehensive test result 3304.

  This embodiment can be executed by a computer program. That is, in the network terminal to be tested, when a network terminal having a telephone function receives a message via the network, a function for determining whether the message is related to a test mode for connection test, the test mode If the message is related to the call, if the message is related to the call, if the call is related to the call, a function to return the setting information specific to the telephone function as an incoming response message is realized in the computer Can be provided with a program. On the other hand, in the test network terminal, a function of transmitting a call message indicating a test mode for connection test to a network terminal having a telephone function via the network, the telephone as an incoming response message from the network terminal A program for causing a computer to realize a function of receiving unique setting information related to a function, and a function of judging the validity of connection of the network terminal based on the received setting information and setting information registered in advance Can be provided. Further, this program can be stored in a computer-readable recording medium such as a CD-ROM, and can be downloaded by uploading via an electric communication line such as the Internet, and is appropriately installed in a network terminal such as a personal computer. be able to.

  As described above, in this example, the description is based on the SIP. The same applies to lines such as H.323 and ISDN. The above test is generally performed at night when each PC (telephone) is not used. However, when the PC under test (telephone) in a test mode is busy, A busy response is made, the test is not performed, and the test is retested at the next timing. In the unlikely event that a test mode call conflicts with the use of a PC (telephone), testing is possible during answer tone and numeric keypad input, and testing is performed when dialing is completed. This can be done by delaying the transmission for a few seconds.

  Furthermore, each PC is provided with a wireless position measurement means such as GPS or PHS, or a position calculation means for determining the position from the assigned terminal IP address by associating the IP address assignment method with the position. Can be. As described above, the installation location (position information) of the PC can be known by the position acquisition means such as the position measurement means and the position calculation means. By including this position information in incoming messages 732 and 733 from the PC, it is possible to check the validity of whether the installation location is appropriate.

  The present invention relates to a network terminal connected to a network, and more particularly to a network terminal such as a PC having a telephone function such as an IP telephone that can communicate via a network such as the Internet, and can be used industrially. There is sex.

It is a figure which shows one structural example of the network system containing PC which concerns on this invention. It is a figure which shows the functional block containing the software and hardware of PC (PCa3, PCx4, PCy5). It is a figure which shows the functional block containing the software and hardware of SIP server apparatus 1,2. It is a figure which shows an example of the telephone operation screen in PC (PCa3, PCx4, PCy5). It is a figure which shows an example of the telephone directory database 1100 provided in the hard disk 104 of the SIP server apparatuses 1 and 2. It is a figure which shows an example of the test object address list | wrist 3300 provided in the hard disk 315 of PC. It is a flowchart which shows the example of a process in the case of performing the communication connection test with respect to PCx4 for test etc. sequentially from the test PCa3 via the SIP server apparatus 1,2. It is a figure which shows an example of the format of the message | telegram transmitted / received by the test process of PC and SIP server apparatus 1, 2 of FIG. It is a figure which shows an example of the setting of the message | telegram transmitted / received by the test process of PC and SIP server apparatus 1, 2 of FIG. It is a figure which shows the incoming call result database 1000 which registers the incoming call result which has in the hard disk 315 of PC. It is a flowchart which shows an example of the incoming call response process in PCx4 for test. 12 is a flowchart illustrating an example of a test result verification process in which a test result is verified and the result is reflected in a comprehensive test result 3304 of a test target address list 3300.

Explanation of symbols

1, 2, SIP server device 3, 4, 5 PC (PCa, PCx, PCy)
6 Internet 7, 8 Router 101 Communication control unit 102 Message transmission / reception processing unit 103 Message relay processing unit 104 Hard disk 301 Communication control unit 302 Telephone control unit 303 Mail control unit 304 Operation control unit 305 Input / output control unit 310 Handset 311 Keyboard 312 Display 315 Hard disk 320 Telephone operation screen 321 Telephone number input area 322 Display area 323 Number / symbol button 324 Call / incoming button 325 Disconnect button 326 Control button

Claims (8)

  A network terminal having a telephone function connectable via a network to a test terminal that transmits a call message indicating a test mode for a connection test, the test terminal being in the test mode A network terminal characterized in that, when a call telegram indicating the above is received, setting information specific to the telephone function is returned as an incoming response telegram to the test terminal.   The test terminal is further capable of transmitting a test dial tone, and when the test dial tone is received from the test terminal, the test dial tone is returned to the test terminal. The network terminal according to claim 1.   A network terminal for transmitting a call message indicating a test mode for connection test to a terminal under test having a telephone function via a network, wherein the telephone function is used as an incoming response message from the terminal under test A network terminal, wherein the network terminal receives the setting information unique to the terminal and determines the validity of the connection of the terminal under test based on the received setting information and the setting information registered in advance.   Further, a test dial tone is transmitted to the terminal under test, and the connection quality of the terminal under test is determined based on the test dial tone returned from the terminal under test. The network terminal according to claim 3.   A network terminal having a telephone function and a location acquisition means connectable via a network to a test terminal for transmitting a call message indicating a test mode for connection test, wherein the test is performed from the test terminal. A network terminal characterized in that, when a call telegram indicating a mode is received, the location information acquired by the location acquisition means is returned as an incoming response telegram to the test terminal.   A network terminal for transmitting a call message indicating a test mode for a connection test via a network to a terminal under test having a telephone function and a position acquisition unit, and receiving a response message from the terminal under test And receiving the position information acquired by the position acquisition means, and determining the validity of the connection of the terminal under test based on the received position information and the previously registered position information. .   When a network terminal having a telephone function receives a message via the network, a function for determining whether or not the message is related to a test mode for connection test, and if the message is related to the test mode, the message is called A program for causing a computer to realize a function for determining whether or not a call is related, and a function for returning unique setting information related to the telephone function as an incoming call response message when the call is related to an outgoing call.   A function for transmitting a call message indicating that it is a test mode for connection test via a network to a network terminal having a telephone function, and receiving setting information specific to the telephone function as an incoming response message from the network terminal And a program for causing a computer to realize a function of judging the validity of the connection of the network terminal based on the received setting information and the setting information registered in advance.

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