JPH0918608A - On-line terminal - Google Patents

Abstract

PURPOSE: To prevent undesired line connection for a long time caused in the case of executing self-station confirmation processing. CONSTITUTION: A CPU 70 in an on-line terminal 3 controls an NCU 40 and connected to a telephone network line through a modem 50, reads a telephone number stored on a hard disk 30 and allows the NCU 40 to make dialing of the telephone number, and discriminates whether or not a busy tone is detected based on a detection signal from a busy tone detection circuit 50a. When a busy tone is detected, the CPU 70 allows NCU 40 to hooks on thereby interrupting the connection with the telephone network line. On the other hand, when no busy tone is detected, the CPU 70 discriminates whether or not a call tone is detected based on a detection signal from a call tone detection circuit 50b. When a call tone is detected, the connection to the telephone network line is inhibited and inhibit control of processing such as information provision service is conducted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an online terminal device used in an online system using a telephone network line.

[0002]

2. Description of the Related Art Conventionally, an online terminal device with limited users accesses a host computer via a telephone network line and transmits predetermined information from the host computer to the terminal device. In an online system, it has been possible to restrict unauthorized use with a password check function or the like for the purpose of preventing access from other than limited users (for example, users who have a predetermined contract).

There is also a system that assumes that the installation location of the online terminal device is fixed. The fixing of the installation place is not a case of physically fixing it but a case where it is premised that only the telephone network line arranged at the predetermined installation place is used. This is applied as a system or the like in which the owner is specified based on the telephone number corresponding to the telephone network line and the fee is collected for providing information.

In this case, the online computer may be illegally moved to another place and connected to a telephone network line to which another telephone number is assigned, whereby the host computer may be illegally accessed. As a result, there are inconveniences such as erroneous billing for persons who are not actually using the service, and for the online system operating company, the information providing fee cannot be properly collected and suffers damage.
Therefore, it is considered to prevent these damages by the own station confirmation process. The self-station confirmation processing is performed by the online terminal device itself dialing the telephone number of the online terminal device registered in advance, and as a result, detecting the busy tone from the exchange, which is the equipment of the telephone operator. , The process of confirming that the telephone number to be connected is correctly connected. It is known that when the busy tone cannot be detected by this confirmation process, it is determined that the online terminal device is illegally moved, and the illegal use is prevented by stopping the use of the online terminal device.

Further, not only for the purpose of preventing such illegal use, but also a system on the premise that the location of the online terminal device is allowed to be moved is conceivable. In other words, this is a case where the owner permits the change due to resale or the like. Even in such a situation, since it is necessary to take a predetermined action depending on whether or not the online terminal device is moved, it is conceivable to execute the own station confirmation process.

However, in the case of this own station confirmation processing,
Since it is determined whether or not the busy tone can be detected, a predetermined time-out time is required to detect the busy tone. For example, a timeout time of about 30 to 45 seconds is set. Then, when dialing the telephone number of the online terminal device by itself, there is no problem because it always causes a busy tone, but the online terminal device is actually illegally moved or a line other than an erroneously determined line is set. If it is connected to a line, it will be connected to a line other than the line to which its own terminal device is connected.
Therefore, it is possible to determine that the terminal device has moved because the busy tone cannot be detected, but if a telephone is connected to the dialed line, the call signal is sent to that telephone. Will be sent, and the ringing bell will ring at the telephone. And it will continue for approximately the above timeout period. Such line connection is an unnecessary connection from the viewpoint of the system as a whole, and it is desirable that the unnecessary connection does not continue as much as possible.

In view of the above, the present invention enables the online terminal device itself to execute the own station confirmation processing to determine whether or not the own terminal device has moved, and prevent inconvenience caused by, for example, unauthorized movement. It is an object of the present invention to prevent the unnecessary line connection that occurs in the online system from being maintained for a long time due to the own station confirmation processing.

[0008]

Means for Solving the Problems, Functions and Effects of the Invention
The online terminal device according to claim 1, which is made to achieve this object, is an online terminal device used in an online system using a telephone network line, and performs connection / disconnection with the telephone network line. Line connection means, telephone number storage means for storing a telephone number given to each online terminal device when the telephone network line is connected to the telephone network line by the line connection means, and stored in the telephone number storage means Dialing means for reading out the dialed telephone number and dialing, busy tone / ringing tone detecting means for detecting busy tone or ringing tone as a result of dialing by the dialing means, and said busy tone / ringing tone detecting means When the busy tone is detected by the above, it is determined that the telephone number stored in the storage means and the telephone number currently in use match, and a predetermined number is determined. When the ringing tone is detected, it is determined that the telephone number stored in the storage means and the telephone number currently in use do not match, and the line connection means is used. It is characterized by further comprising: a corresponding process executing means for executing a predetermined non-coincident corresponding process including a process of immediately disconnecting the line.

According to the online terminal device of the present invention, the telephone number storage means stores the telephone number assigned to each online terminal device when it is used by being connected to the telephone network line by the line connecting device. When performing the own station confirmation process, the dial means reads out the telephone number stored in the telephone number storage means and dials. Then, the busy tone / ring tone as a result of dialing by the dial means is detected by the busy tone / ring tone detection means.

When the busy tone / ringing tone detecting means detects a busy tone, the corresponding process executing means makes the telephone number stored in the storing means coincide with the currently used telephone number. It is determined that there is a match and a predetermined matching handling process is executed. On the other hand, when the ringing tone is detected, the handling process executing means determines that the telephone number stored in the storing means and the telephone number currently in use do not match, and the line connecting means promptly makes a line connection. A predetermined inconsistency handling process including a process of disconnecting is executed.

Since the process for dealing with the mismatch always includes the process of immediately disconnecting the line by the line connecting means, the following effects are obtained. First, consider the state when there is a mismatch. If the telephone numbers do not match, it means that the person dialed by the dialing means is not myself, and the telephone number is connected to a line other than the line to which the own terminal device is connected. Therefore, when a telephone is connected to the dialed party's line, a call signal is actually sent from the called exchange to the telephone, and the telephone bell rings. . Further, such a line connection is an unnecessary connection for the telephone on the receiving side as a whole system, and it is desirable that the unnecessary connection does not continue as much as possible.

Therefore, in the case of the online terminal device of the present invention, when a ringing tone is detected, the telephone number stored in the storage means and the telephone number currently in use do not match, and as a result other Since the line is connected to the line of the telephone number, the line connecting means immediately executes the process of disconnecting the line. As a result, it is possible to terminate unnecessary connections as soon as possible for the receiving side telephone as a whole of the system described above.

As the mismatch handling processing, in addition to the processing of immediately disconnecting the line, as shown in claim 2,
It is possible to include a process of prohibiting execution of a predetermined process in its own terminal device, or to include a process of notifying a user that there is a mismatch in telephone numbers as described in claim 3. Conceivable. Further, as described in claim 4, a process of notifying the host device constituting the online system that the telephone numbers do not match may be included.

For example, when it is highly likely that the changed telephone number is an illegal use, a process for prohibiting the execution of a predetermined process is performed and the information providing fee cannot be collected. It is preferable to prevent specific damage. In addition, if the user moves the card by mistake instead of by fraud, it is also preferable to notify the user that the telephone numbers do not match so as to encourage the user to reconnect to the regular line. Furthermore, in the case of a system in which the movement of the online terminal device is permitted, the host device may grasp the fact that the movement has been made, and take subsequent measures. Therefore, it is convenient to deal with them by letting the host device know that the telephone numbers do not match.

Further, as the matching handling processing, contrary to the above-described mismatch handling processing, processing for permitting execution of a predetermined processing in the terminal device is performed, or the telephone number is matched with the host device constituting the online system. It may be a process of notifying that the information is present. On the other hand, as set forth in claim 5, the online system using the telephone network line,
Only after a predetermined delay time elapses from the time when the calling exchange starts sending ringing tone to the calling terminal, the called exchange sends a ringing signal to the called terminal. It may be configured as an online terminal device configured to start sending and used in the online system.

In a general telephone network line, there are a timing at which a calling side switch sends a ringing tone to a calling side terminal device and a timing at which a called side switch sends a calling signal to a called side terminal device. There is no particular synchronization between the two. On the other hand,
According to the present invention, the called-side switching device does not call the called-side terminal device until a predetermined delay time elapses from the time when the calling-side switching device starts sending ringing tones to the calling-side terminal device. An online terminal device connected to such a telephone network line is premised on a telephone network line having a function of transmitting a call signal to the telephone network line.

As described above, the control on the side of the online terminal device is to immediately disconnect the line when a ringing tone is detected. Since the called side switching device sends the ringing signal to the called side terminal device only after a predetermined delay time has elapsed from the time when the calling tone was started to be sent, The time during which the call signal is transmitted can be relatively shortened. Therefore, for example, when the called terminal device is a telephone, the bell ringing time can be shortened.

Further, as described in claim 6, the predetermined delay time is different from that of the corresponding processing execution means from the time point when the calling side switching device starts to send a busy tone to the calling side terminal device. By setting the time longer than the time until the line disconnection process is completed by the handling process, it is possible to prevent the ringing signal from being sent to the terminal device on the called side. If it is, it is possible to prevent the bell from ringing.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an overall schematic configuration of an online system using a telephone network line, FIG. 2 is a block diagram showing a basic configuration of a telephone network line, and FIG. 3 is an online terminal of this embodiment used in the online system. It is a block diagram showing a schematic structure of a device.

As shown in FIG. 1, in this online system, a host device 1 and a plurality of online terminal devices 3 are
It is configured to be connected via a telephone network line 5, and the terminal device 3 and the host device 1 or the terminal devices 3 can communicate with each other using the telephone network line 5.
As shown in FIG. 2, the telephone network line 5 has, as a basic configuration, an exchange connected to the host device 1 or the online terminal device 3 by a subscriber line, and a relay line connecting the exchanges. A predetermined number of terminals will be connected to one exchange, and the terminal device 3 to the host device 1 will be connected.
Alternatively, when communicating with another terminal device 3, first, the own terminal device 3, which is the calling side, is connected to a corresponding predetermined exchange (called a calling side exchange). Then, the calling side exchange is connected to a terminal device 3 of a partner designated by a telephone number or a predetermined switch managing the host device 1 (called a called side switch), and finally a terminal device of a designated partner to be desired. 3 or the host device 1.

Next, the configuration of the online terminal device 3 will be described. As shown in FIG. 3, the online terminal device 3
Is a CRT 10 as a display unit, a keyboard 20 as an input unit, a hard disk 30 as a telephone number storage unit, an NCU (telephone network control unit) 40 as a line connection unit, a communication unit, and a busy tone. A modem 50 that also functions as a ringing tone detection means, a timer 60 that functions as a time counting means, a CPU 7 that controls the entire online device, and that also functions as a dial means and a corresponding process execution means.
0. These CRT10, keyboard 2
0, the hard disk 30, the NCU 40, the modem 50, and the timer 60 are each connected to the CPU 70.

The CRT 10 is already stored in the hard disk 30 and can be serviced immediately, or information stored in the host device 1 and available online for future service, and customer operation. This is for displaying guidance and the like.

The keyboard 20 is the online terminal device 3.
It is for inputting an own telephone number, operating instructions relating to the online terminal device 3, such as execution of various services. The hard disk 30 stores the telephone number of the online terminal device 3 itself input by the keyboard 20 and information necessary for the online terminal device 3 to perform a service, and is read by the CPU 70 as necessary.

The NCU 40 is connected to the subscriber line, and the CP
Under the control of U20, dialing is performed for the host device 1 of the online system, other online terminal devices 3, etc., or line connection / disconnection with the telephone network line 5 is performed. The modem 50 transmits the information of the operation instruction input by the user to the host device 1 through the telephone network line 5, and receives the new service information from the host device 1. The information received here is displayed on the CRT 10.
Further, the modem 50 includes two detection circuits 50a and 50b composed of bandpass filters and the like.

The busy tone detection circuit 50a is for detecting whether or not the other party who dialed is currently busy, and makes a call when dialed through the NCU 40 and connected to the telephone network line 5. A predetermined detection signal can be output to the CPU 70 when a frequency of a sound is detected and a frequency (busy sound) peculiar to the sound is detected.

On the other hand, the ring back tone detection circuit 50b indicates that the called side exchange (see FIG. 2) performs a ringing operation by transmitting a ringing signal to the called side terminal. This is for detecting a ringing tone (ringback tone) for notifying the calling side. In detail, when dialed through the NCU 40 and connected to the telephone network line 5, the frequency of 400 Hz peculiar to the ringing tone is set to 15 Hz or more and 20 Hz or more.
When modulated by the following, when a tone with a disconnection ratio of 20 IPM (number of interrupts per minute) plus or minus 20% and a make rate of 33% is detected, and a unique frequency (ring tone) when a ringing is detected is detected. A predetermined detection signal can be output to the CPU 70.

The timer 60 measures the time after the online terminal device 3 starts the service and the current time. Then, the CPU 70 reads out the elapsed time and the current time from the timer 60 at any time. The CPU 70 controls each of the above-mentioned components to check for illegal use and perform other ordinary online terminal device 3 services.

Next, the operation of the online terminal device 3 of this embodiment will be described with reference to the flowchart shown in FIG.
However, the flowchart of FIG. 4 shows only the processing of the own station confirmation at a preset timing, and the processing relating to the operation of the online terminal device such as normal information provision is omitted.

When the own station confirmation processing is started, first, the CPU
70 confirms whether the telephone number is stored in the hard disk 30 (S10). If the telephone number is not stored in the hard disk 30 (S10: NO), guidance is displayed on the CRT 10 to prompt the user to input the telephone number (S20). Then, the state of waiting for input continues until the telephone number is input from the keyboard 20 (S30: N
O).

Next, the CPU 70 controls the NCU 40 and connects it to the telephone network line 5 through the modem 50 (S5).
0). Then, the telephone number stored in the hard disk 30 is read (S60), and the read telephone number is dialed by the NCU 40 (S70).

After that, the CPU 70 manages the number of retries of the busy tone / ringing tone detection processing by the work area Ret.
ryCount (hereinafter abbreviated as RC) is initialized to zero (S80). Then, the CPU 70 determines whether or not the busy tone is detected (S90). Whether or not the busy tone is detected is determined based on the detection signal from the busy tone detecting circuit 50a. Specifically, if there is no detection signal at the start of the determination, the process immediately proceeds to S110. However, if there is a detection signal at the start of the determination, it is not immediately determined that the busy tone is detected, and the predetermined time is not detected. It is assumed that the process proceeds to S100 only when there is a detection signal subsequently. this is,
This is to prevent erroneous determination, and the predetermined time is, for example, about 1 second.

S100 to shift when a busy tone is detected
Then, a predetermined matching handling process is executed. In this matching handling process, assuming that the installation location of the online terminal device 3 has not been moved, the NCU 40 directly goes on hook to disconnect the telephone network line 5. It should be noted that a process of storing in the hard disk 30 the confirmation record that the telephone numbers match may be included. Furthermore, a process of automatically transmitting this confirmation record to the host device 1 may be included.

After executing such matching correspondence processing, this own station confirmation processing is once ended. Then, until the next unauthorized use check is performed at the time designated by the timer 60, a process related to a service such as predetermined information provision is performed as usual. On the other hand, if the busy tone is not detected (S
90: NO), the process proceeds to S110, and it is determined whether a ringing tone is detected.

Whether or not the ringing tone is detected is determined based on the detection signal from the ringing tone detecting circuit 50b. Similar to the above-mentioned busy tone detection, if there is no detection signal at the start of determination, the process immediately proceeds to S130. However, if there is a detection signal at the start of determination, a ringing tone is detected to prevent erroneous determination. The determination is not immediately made, and the process proceeds to S120 only when there is a detection signal continuously for a predetermined time. The predetermined time is, for example, about 1 second.

S120 to shift to when a busy sound is detected
Then, a predetermined mismatch handling process is executed. In this inconsistency handling process, it is assumed that the online terminal device 3 has been moved to the installation location, and the NCU 40 first makes an on-hook to disconnect the connection with the telephone network line 5. And
After that, control is performed to prohibit predetermined processing such as information providing service. That is, even if there is an input through the keyboard 20, the corresponding process is not executed. In addition,
In this case, the CRT 10 may display that the predetermined processing at the terminal is prohibited because the telephone numbers do not match. Further, a process of storing the confirmation result that the telephone numbers do not match in the hard disk 30 and a process of automatically transmitting the confirmation result that the numbers do not match to the host device 1 may be included.

Returning to FIG. 4, when the ringing tone is not detected (S110: NO), the process proceeds to S130, and the work number counter work area RC of the above-mentioned busy tone and ringing tone detection process is incremented. Then, in subsequent S140, it is checked whether the counter RC is 3 or more. Same counter RC
If is not 3 or more (S140: NO), the process proceeds to step S90, and the above-described processing (S90 to S120) relating to the detection of the busy tone and the ringing tone is repeated.

On the other hand, if the counter RC is 3 or more (S140: YES), the process proceeds to S150 and the unconnected handling process is executed. In this disconnection handling process, since neither the busy tone nor the ringing tone could be detected for a certain period of time,
It is judged that the online terminal device 3 is not connected to the line,
This is a process of on-hooking by the NCU 40 to disconnect the connection with the telephone network line 5, displaying, for example, "line not connected" on the CRT 10, and notifying the user.

Next, the operation and effect of the own station confirmation processing of the online terminal device 3 of this embodiment will be described with reference to the time chart of FIG. FIG. 5A is a time chart showing an example of a conventional own station confirmation process for comparison, and FIG. 5B is a time chart showing the own station confirmation process in the case of the present embodiment. In both cases, the case where the telephone numbers do not match, that is, the case where a telephone number other than the own station is dialed is shown.

First, the conventional case shown in FIG. 5A will be described. When the terminal on the calling side goes off-hook, the exchange on the calling side sends a dial tone correspondingly. Then, when dialing is performed by the calling side terminal, detection of a busy tone (busy tone) is started thereafter, and on-hook is performed after the busy tone detection time-out period has elapsed. In the case of the conventional own station confirmation processing, since it is determined whether or not the busy tone can be detected, the timeout time is set to, for example, about 30 to 45 seconds.

There is no particular problem when the telephone number of the calling terminal itself is dialed, but the line is connected to a line other than the line to which the terminal is connected, and the telephone line is connected to the dialed line. When connected, a ringing signal is actually sent to the telephone. That is, as shown in FIG. 5 (A), ringing is sent from the called exchange to the called terminal.
A ringing bell will be rung at the telephone which is the called terminal.

Then, a ring back tone is sent from the calling side exchange to the calling side terminal. However, at the calling side terminal, the ring back tone must be sent after the busy tone detection time-out period described above has elapsed. If it is not on-hook, the ringing of the ring continues on the telephone that is the called terminal during the timeout period. Such line connection is an unnecessary connection from the viewpoint of the system as a whole, and it is desirable that the unnecessary connection does not continue as much as possible.
In particular, it is not preferable to ring the bell for a long time in the telephone as the called side terminal as in the above example.

On the other hand, in the case of the present embodiment shown in FIG. 5B, the ringback tone is added to the busy tone when the busy tone detection is started in the conventional case of FIG. 5A. Detection of is also started at the same time. Since the ring back tone is transmitted from the calling side exchange, the calling side terminal immediately detects the ring back tone. As described in the explanation of the flow chart of FIG. 4, if the ringback tone detection signal continues for about 1 second in order to prevent erroneous determination, the ringing tone is detected (S11 of FIG. 4).
0: YES).

Then, immediately after the detection, it goes on hook. This is the control time determined by the CPU performance, etc.
Since the time is as short as 10 milliseconds, for example, the ringback tone transmission duration is as short as less than 2 seconds. Therefore, the ringing transmission time from the called exchange to the called terminal and the resulting ringing time for the ringing at the called terminal (telephone) is also less than 2 seconds. In this way, it is possible to terminate the unnecessary connection as soon as possible for the telephone on the receiving side as a whole system.

In the case of the terminal device 3 used in an online system in which it is highly likely that the changed telephone number is illegally used, the above-mentioned inconsistency handling processing is performed by an information providing service or the like in the terminal. It is preferable to perform control to prohibit a predetermined process. This is to prevent substantial damage due to unauthorized use such as the inability to collect the information providing fee when the information providing service is charged.

In the case of improper movement by mistake, it is preferable to notify the user that the telephone numbers do not match so that the telephone line can be reconnected. Further, in the case of an online system in which the movement of the online terminal device 3 is permitted, the host device 1 may grasp the fact that the movement has been made and take a subsequent action. Therefore, a process of automatically transmitting the fact that the telephone numbers do not match to the host device 1 or making it possible to send an inquiry from the host device 1 can be adopted as the mismatch handling process.

The present invention is not limited to the embodiments as described above, and may be carried out in various modes without departing from the gist of the present invention. For example, in the case of the above-described embodiment, it is assumed that the telephone network line 5 to which the online terminal device 3 is connected is general. That is, there is no particular synchronization between the timing at which the calling exchange sends a ringing tone to the calling terminal and the timing at which the called exchange sends a calling signal to the called terminal. for that reason,
As shown in FIGS. 5A and 5B, the ringback tone and the ringing are transmitted at substantially the same time.

On the other hand, the system of the telephone network line 5 is provided with the called side only after a predetermined delay time elapses from the time when the calling side exchange starts to send the ring back tone to the calling side terminal. The online terminal device 3 may be configured so that the exchange starts sending ringing to the called terminal, and is used in an online system using such a telephone network line 5.

In this case, the following operation is performed.
The control of the online terminal device 3 as a calling side terminal executes a process of immediately disconnecting the line when a ring back tone is detected. Since the called side switching equipment sends the ringing to the called side terminal only after a predetermined delay time (ringing delay) has passed from the time when the back tone is started to be sent, the ringing to the called side terminal is performed. Can be relatively short. Therefore, for example, when the called terminal is a telephone, the bell ringing time can be shortened.

Then, as shown in FIG. 5 (C), the above-mentioned ringing delay time is processed on-hook at the calling side terminal from the time point when the calling side exchange starts sending a ringback tone to the calling side terminal. If it is set longer than the time until the end of the call, it is possible to prevent the call signal from being sent to the called terminal. In this case, FIG.
As surrounded by a dotted line in (C), ringing transmission from the called exchange is not executed, and therefore the bell does not ring when the called terminal is a telephone.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an entire online system using a telephone network line.

FIG. 2 is a block diagram showing a basic configuration of a telephone network line.

FIG. 3 is a block diagram showing a schematic configuration of an online terminal device of this embodiment used in the online system.

FIG. 4 is a flowchart showing a local station confirmation process in an online terminal device.

5A and 5B show the operation and effect of the own station confirmation processing of the online terminal device, where (A) is the conventional processing, (B) is the processing of this embodiment, and (C) is the telephone network line of another aspect. It is a time chart which shows the processing when each is used.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Host device 3 ... Online terminal device 5 ... Telephone network line 10 ... CRT 20 ... Keyboard 30 ... Hard disk 40 ... NCU (telephone network control unit) 50 ... Modem 50a ... Busy tone detection circuit 50b ... Ring tone detection circuit 60 ... Timer 70 ... CPU

Claims (6)

[Claims] 1. An online terminal device used in an online system using a telephone network line, comprising line connecting means for connecting and disconnecting with the telephone network line, and the telephone network line by the line connecting means. Telephone number storage means for storing a telephone number assigned to each online terminal device when connected and used, dial means for reading and dialing the telephone number stored in the telephone number storage means, and the dial Busy tone / ring tone detection means for detecting a busy tone or ring tone as a result of dialing by the means, and when the busy tone / ring tone detection means detects the busy tone, the storage means stores it. If it is determined that the stored telephone number and the currently used telephone number match, a predetermined matching response process is executed, while if a ringing tone is detected, It is determined that the telephone number stored in the storage means and the telephone number currently in use do not match, and a predetermined mismatch handling processing including processing for immediately disconnecting the line by the line connecting means is executed. An online terminal device comprising a processing execution means. 2. The online terminal device according to claim 1, wherein the inconsistency handling process includes a process of prohibiting execution of a predetermined process in the own terminal device. 3. The online terminal device according to claim 1, wherein the mismatch handling process includes a process of notifying a user that there is a mismatch in telephone numbers. 4. The online terminal device according to claim 1, wherein the mismatch handling process is a process of notifying a host device that constitutes the online system that there is a mismatch of telephone numbers. An online terminal device comprising: 5. The online system using the telephone network line is provided only after a predetermined delay time elapses from the time point when the switching device on the calling side starts sending a ringing tone to the terminal device on the calling side. 5. The called side exchange is configured to start sending a calling signal to the called side terminal device, and is used in the online system. The online terminal device described in 1. 6. The predetermined delay time from the point in time when the exchange on the calling side starts to output a ringing tone to the terminal device on the calling side,
6. The online terminal according to claim 5, wherein the online terminal is used in an online system set to be longer than a time until the line disconnection process is ended by the mismatch handling process of the handling process execution means. apparatus.