JP2001257803A - Communication terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To evade unnecessary recalling operation by performing control so that recalling intervals are varied according to the state of an opposite partner in the case of a failure in communication with the opposite side. SOLUTION: This communication terminal device which has an automatic recalling function of automatically making a call again when communicating with an opposite-side device is equipped with a system control part 7 which has multiple parameters of a recalling interval from calling to next calling and changes the recalling interval by selecting one of the recalling intervals according to the answer signal sent from the opposite-side device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus having an automatic redialing (redial) function or a communication terminal apparatus such as a composite image forming apparatus or an OA apparatus having a facsimile function. A plurality of parameters are prepared, and the re-call interval is selected according to communication conditions with the other party to perform re-call control.

[0002]

2. Description of the Related Art In a facsimile apparatus having a normal automatic flashing / recalling function, if communication is not completed normally,
The call is redialed at predetermined time intervals. In such a device, a re-call is repeatedly executed at a predetermined interval regardless of the reason why communication could not be performed. As reference technical documents relating to the automatic redialing (redial) function, for example, Japanese Patent Application Laid-Open No. 5-146
No. 69, “Facsimile machine” and JP-A-6-225.
No. 043 discloses a “communication terminal device”.

[0003] A "facsimile apparatus" disclosed in Japanese Patent Application Laid-Open No. HEI 5-14669 discloses a reason for communication inability to be notified from a network when a facsimile apparatus does not enter a communication with a destination when a call is made (contents of a call disconnection message). ) Is detected and analyzed to determine whether a recall operation is possible. Then, a recall operation is performed based on the determination result (reason).

Japanese Patent Laid-Open Publication No. Hei 6-225043 discloses a "communication terminal device" which comprises means for determining the end of an automatic redial operation on a time scale instead of the number of recalls, a time interval between recalls, and a counting of the number of recalls. By doing so, the switching means is provided so that the operator can reliably grasp the end time of the automatic redial operation and reduce the load of communication processing on the network side.

[0005]

However, in the above-described conventional apparatus having an automatic calling function, for example, a communication destination (call destination) communicates with another destination. Therefore, if communication cannot be performed from the own device, connection with the other party cannot be established even if the call is re-established unless the communication is terminated. In addition, if the call is connected to the call destination, but an error occurs during the communication, and the call does not end normally, it is impossible to connect even if the call is immediately made.
If the exchange cannot be connected to the other party due to the busy state, the connection with the other party is impossible unless the exchange is busy.

[0006] As described above, depending on the reason that the communication has not been completed normally, there is a case where the call is immediately re-established and the call is not connected, or a case where the call is connected. When the other party is busy or when the exchange is busy, there are often cases where a call is immediately re-established and then re-busy, etc., causing a wasteful re-call. Also, for automatic recall setting at a fixed recall interval, the user's usage (situation) varies, and even if the setting is valid for one user, it is inconvenient for other users. There were also problems.

[0007] The present invention has been made in view of the above, and when communication with a partner cannot be performed, control is performed so as to change the recall interval in accordance with the situation of the partner, thereby reducing waste. A first object is to avoid a repetitive call operation.

It is a second object of the present invention to improve the usability for the user by making the recall interval correspond to the user's request.

[0009]

According to a first aspect of the present invention, there is provided a communication terminal apparatus for automatically re-establishing a call when communicating with a destination apparatus. In a communication terminal device having a call function, the communication terminal device has a plurality of parameters of a re-call interval from a call to the next call, and one re-call from the plurality of re-call intervals according to a response signal transmitted from the destination device. It is provided with control means for selecting and changing the interval.

According to the present invention, a plurality of parameters of different recall intervals are prepared, and recalls are selected and changed from a plurality of recall intervals in accordance with the type of a response signal transmitted from the destination apparatus. As a result, a re-call corresponding to the situation of the destination device is realized.

Further, in the communication terminal device according to claim 2, the control means receives a response signal transmitted from the destination device, the signal indicating that communication has not been normally completed. In such a case, the recall interval is changed.

According to the present invention, when the response signal transmitted from the destination device receives a signal indicating that the communication has not been normally completed, the communication with the destination has been completed but the communication has been normally completed. If there is no call, the call destination is not particularly busy, so it is considered that the callee or the switchboard was busy even if the call was re-scheduled immediately. Probably high enough. Therefore, by selecting and changing, for example, an interval longer than the previous recall interval from a plurality of preset recall intervals, an accurate recall can be performed in the case where the normal termination is not completed.

[0013] In the communication terminal device according to the third aspect, the control means may be configured to execute a communication error in the first case where communication with the partner device is not possible and a communication error after the communication connection with the partner device. In the second case, different recall intervals are selected.

According to the present invention, a call is made to the destination device,
In the first case where communication connection with the partner device cannot be established, and in the second case where a communication error has occurred after communication connection with the partner device, the resumption time until reconnection is naturally different. By making a selection from a plurality of set recall intervals and changing the recall, the recall can be performed according to the situation of the destination apparatus.

[0015] In the communication terminal apparatus according to the fourth aspect, the control means may include a busy tone transmitted from the exchange when the destination apparatus is busy, and a reorder transmitted when the exchange is busy. When a tone signal is received, different recall intervals are selected for the busy tone and the reorder tone.

According to the present invention, when a busy tone transmitted from the exchange and a reorder tone signal transmitted when the exchange is busy are received when the destination apparatus is busy, the busy tone and the reorder tone are transmitted. , By selecting a different recall interval, if a busy tone is detected, the other party is considered busy,
It is likely that you will be busy again if you call immediately,
On the other hand, if a tone notifying that the exchange is busy is detected without a busy tone being detected, the exchange is busy. Since connection is impossible, a recalling interval is selected and changed in consideration of these situations, and a recalling is performed, thereby enabling a recalling according to the situation of the partner apparatus.

Further, in the communication terminal device according to the fifth aspect, the control means sends a signal to the destination device when a busy tone is detected from an exchange before calling a dial signal, and when a dial signal is issued. Different recall intervals are selected depending on whether a busy tone is detected after calling.

According to the present invention, the re-call interval is determined when the busy tone is detected from the exchange before calling the dial signal to the destination apparatus and when the busy tone is detected after calling the dial signal. By making the case where the busy tone is detected after calling the dial signal longer than the case where the busy tone is detected from the exchange before making the call, a re-call according to the situation of the other party and the exchange is realized.

Further, in the communication terminal device according to claim 6, the control means changes the recall interval when the number of recalls for the same reason reaches a predetermined number.

According to the present invention, when the number of re-calls for the same reason (same response signal) reaches a predetermined number,
By assuming that the state for the same reason continues for a long time and changing the recall interval to a longer time than the current state, an accurate recall can be realized when communication is not established for the same reason.

Further, the communication terminal device according to claim 7 further comprises a setting means for setting the number of recalls for changing the recall interval.

According to the present invention, the number of recalls for changing the recall interval is set through setting means such as an operation display unit according to the user's preference or communication state, thereby responding to the user's request. It becomes possible to do.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a communication terminal device according to the present invention will be described below in detail with reference to the accompanying drawings. In this embodiment, a facsimile machine will be described as an example. However, the present invention is not limited to this embodiment as long as it has a function including the gist of the present invention.

FIG. 1 is a block diagram showing a configuration of a facsimile apparatus according to an embodiment of the present invention. In the figure, the facsimile apparatus includes a scanner 1, a plotter 2, an encoding / decoding unit 3, a network control unit 4, a modem 5, an operation display unit 6, a system control unit 7, , Is provided.

The scanner 1 irradiates a document to be transmitted or copied, optically reads out the image with an image pickup device such as a CCD (charge coupled device), and outputs it as an electric signal. The plotter 2 prints the received image data or the image data read by the image reading unit 2 in the copy mode on recording paper such as thermal paper or plain paper. The printing method is
Any of a thermal system, an inkjet system, a laser printer, and the like may be used.

The encoding / decoding unit 3 is provided with an MH (modified Huffm
an) The received image data is compressed by an encoding method such as an encoding method or an MR (modified READ) encoding method, or is decoded into original data at the time of printout.

The network control unit 4 is connected to the telephone set 9, captures an external line, sends out a selection signal as a destination telephone number signal, and performs a predetermined calling operation and a receiving operation by processing such as detecting an incoming call. Is what you do. The modem 5 decodes and transmits image data, and also transmits various procedure signals in transmission control.

The operation display unit 6 registers numeric keys used for inputting a destination number, an ID code, and the like, a display for displaying an operation procedure, a state, and time, a destination number, a function function, and a series of transmission operations. And one-touch keys used for character input are prepared,
It is used when the user sets an arbitrary mode, makes various settings related to transmission and reception, and confirms various settings and transmission and reception. The system bus 8 is a signal line through which each functional element exchanges various control signals and data with each other.

The system control section 7 is equipped with a microcomputer system and controls each element constituting the facsimile apparatus. FIG. 2 is a block diagram showing a main configuration of the system control unit 7 in FIG. 1. The CPU 10 executes control according to a control program, a ROM 11 storing a control program, and a RAM 12 used as a working memory. , A timer 13 used for measuring a recall interval, etc., and an NV which is a nonvolatile memory for setting parameters and the like described later.
And a RAM 14.

FIG. 3 is an explanatory view showing an example of setting parameters of a call counter and a recall interval in the facsimile apparatus according to the embodiment of the present invention, and shows a state of a storage area of the NVRAM 14 in the system control unit 7. It is. In the figure, reference numeral 15 denotes a call counter that is incremented by one for each call, reference numeral 16 denotes a same-reason recall counter that counts for each same call reason, and reference numeral 17.
22 are recall intervals A to E which are set so that the times of the recall intervals are different.

Further, the user can arbitrarily set the call counter 15, the same reason recall counter 16, and each recall interval from the operation display unit 6. The recall interval is preferably, for example, A is 3 minutes,
B and C are set to a value such as 10 minutes, and C 'is set to a value such as 15 minutes. Further, the setting relation of each recall interval is B> A, E>
C ′, D> C.

Next, the operation of the facsimile apparatus configured as described above will be described. FIG. 4 is a flowchart illustrating a first operation procedure according to the embodiment of the present invention. When a calling operation is performed, the network controller 4 first closes the line (step S11). Thereafter, a calling process for sending a dial signal to the communication line is executed (step S12).

After performing the above-mentioned calling process, the calling counter 15 for counting the number of calls is incremented by one (step S13), and the communication process is executed (step S1).
4). This communication process is performed by the facsimile
-T. Communication processing is performed in accordance with the facsimile transmission procedure specified in No. 30. Subsequently, it is determined whether the communication has been normally completed (step S15).

When it is determined in step S15 that the communication has been normally completed (step S15, determination Ye
s), the call counter 15 is cleared (step S1).
7), end this processing. On the other hand, if it is determined that the communication has not been completed normally (step S15, determination No),
Further, it is determined whether or not the total number of calls set in the apparatus and the number of calls (the value of the call counter 15) are the same (step S16). If the total call count setting is equal to the call count (step S16, Yes), the process proceeds to step S17.

On the other hand, if it is determined in step S16 that the total number of calls setting and the number of calls are not the same value (step S16, determination No), the process is continued assuming that re-calling is to be performed. Then, it is further determined whether or not a connection has been made with the other party (step S18). Here, when it is determined that the connection has been established with the other party (step S18, determination Ye)
s), the re-call interval is set to A (step S19).
Then, it is determined whether or not the recall interval has elapsed (step S20), and the process stands by until the recall interval has elapsed (step S20, determination No). On the other hand, if it is determined in step S20 that the recall interval has elapsed (step S2).
(0, determination Yes), the process returns to step S11, and the calling process is performed again.

If it is determined in step S18 that there is no connection with the other party (step S18, determination No),
The recall interval is set to B (step S21). Then, it is determined whether or not the recall interval has elapsed (step S).
22), and wait until the re-call interval elapses (step S22, determination No). On the other hand, if it is determined in step S22 that the recall interval has elapsed (step S22, determination Yes), the process returns to step S11, and the call processing is performed again.

The re-call interval A when the connection is established with the other party but the communication is not completed normally is not necessarily that the other party is busy. Therefore, even if the call is immediately re-established, it is considered that the other party or the exchange is busy, so it is considered that the possibility that the call is immediately busy again is sufficiently high. Therefore, as a setting of the recall interval, A becomes a small value and B becomes a large value.

FIG. 5 shows a second embodiment according to the present invention.
6 is a flowchart showing the operation procedure of FIG. The operations from step S21 to step S30 in FIG. 5 are the same as those from step S11 to step S20 in FIG. 4 described above, and thus the operation from step S31 will be described.

If it is determined in step S28 that the call is to be re-established because the connection has not been established with the other party (step S28, determination No), it is further determined whether the other party is busy, ie, has detected a busy tone (step S28).
31). If a busy tone is detected (step S31, Yes), the recall interval is set to C (step S32). Further, it is determined whether or not the recall interval has elapsed (step S33). That is, the recall interval C
(Step S33, judgment N)
o).

On the other hand, if no busy tone is detected in step S31 (step S31, judgment N
o) The switch is determined to be busy, for example, when a tone notifying that the switch is busy (reorder tone in North America) is detected, and the recall interval is set to D (step S34). Further, it is determined whether the recall interval has elapsed (step S35). That is, the recall interval D
(Step S35, judgment N)
o). Then, when the recall interval elapses (step S3).
3, determination Yes), the calling process is executed again.

The recall interval A in the case where the connection is established but the communication is not completed normally does not mean that the other party is particularly busy. Therefore, there is a high possibility that connection can be established with the other party even if the call is immediately re-established. However, when a call is re-established due to a failure to connect to the other party, and the busy tone is detected, it is considered that the other party was busy. . Further, if a busy tone is not detected and a tone notifying that the exchange is busy is detected, the exchange is busy, and the call is connected to the other party even if a call is made until the exchange stops busy. It is impossible to do. Therefore, the setting of the recall interval is A
Has a small value, C has a large value, and D has a larger value. However, the value of A is a value that satisfies the minimum time of the re-call interval determined by the standard of each country. For example, it is preferable to set A to 3 minutes, C to 10 minutes, D to 15 minutes, and the like.

FIG. 6 shows a third embodiment according to the present invention.
6 is a flowchart showing the operation procedure of FIG. Steps S42, S57, and S58 in FIG.
Since the operation other than the above is the same as that of FIG. 5 described above, a partial operation thereof will be described.

In step S42, it is determined whether a busy tone has been detected from the line. Here, if no busy tone is detected from the line (decision, decision Ye
s), the operations after the calling process (step S43) are executed.

If a busy tone is detected from the line in step S42 (determination, determination No), it is determined that the exchange is busy, the re-call interval is set to E (step S57), and whether the re-call interval has elapsed. It is determined whether or not it is (step S58). That is, the process waits until the re-call interval E elapses (step S58, determination No). Then, when the recall interval has elapsed (step S58, judgment Y)
es) The calling process is executed again. At this time, since the call has not been made, the call counter is not incremented.

FIGS. 7 to 9 are flowcharts showing a fourth operation procedure according to the embodiment of the present invention. The operations from step S61 to step S69 in FIG. 7 are the same as the operations from step S41 to step S49 in FIG. 6, and a description thereof will be omitted.

If the communication made is connected to the other party but is not terminated normally (step S69, judgment Ye
s) It is determined whether or not the previous communication has been called again for the same reason (step S70). Here, when it is determined that the call has been made again for the same reason last time (step S70, determination Ye)
s) The same reason recall counter 16 is incremented (step S71). Further, it is determined whether or not the same reason recall counter ≧ the same reason recall number limit set value (step S72). It is assumed that the same reason recall limit setting value is set to a predetermined value in advance.

If it is determined in step S72 that the same-reason recall counter 16 is equal to or greater than the same-reason recall count limit set value (step S72, Yes), the recall interval is set to B (step S73), Call interval B
(Step S73, judgment N)
o). When the re-call interval B has elapsed (step S73, Yes), the calling process is executed again.

On the other hand, if the same reason recall counter 16 is not equal in the same reason recall count limit setting in step S72 (step S72, judgment No), the recall interval is set to A (step S75), and the recall interval is set. It waits until A has elapsed (step S76, judgment No). When the recall interval A has elapsed (step S76, judgment Ye)
s) The calling process is executed again. If the previous call is not a recall for the same reason (step S70, judgment No), the recall interval is set to A (step S7).
5) Wait until the re-call interval A elapses (step S76, determination No). When the re-call interval A has elapsed (step S76, judgment Yes), the calling process is executed again.

If a busy tone is detected in step S62 (step S62, determination No), the process proceeds to FIG. 8, and it is further determined whether or not the previous time was awaiting a recall for the same reason (step S77). If it is determined that the call waiting is made again for the same reason last time (step S7)
7, determination Yes), the same reason recall counter 16 is incremented (step S78). Then,
It is determined whether the same reason recall counter ≧ the same reason recall limit setting value (step S79).

If it is determined in step S79 that the same-reason recall counter 16 is equal to or greater than the same-reason recall limit setting value (step S79, Yes), the recall interval is set to E (step S80), and the recall is performed. Call interval E
(Step S81, judgment N)
o). When the re-call interval E has elapsed (step S81, determination Yes), the calling process is executed again.

On the other hand, if it is determined in step S77 that the previous time did not cause a recall for the same reason (step S77, No), or in step S79, the same reason recall counter 16 indicates that the same reason recall number limit has been reached. If the settings are not equal (step S79, judgment N
o), the recall interval is set to C '(step S82),
Wait until the re-call interval C 'has elapsed (step S8)
3, Judgment No). When the re-call interval C 'has elapsed (step S83, determination Yes), the calling process is executed again.

On the other hand, if the call made in step S69 in FIG. 7 is not connected to the other party and a call is to be re-established (step S69, No), the process proceeds to FIG. 9 to determine whether or not a busy tone is detected. (Step S84). Here, when the busy tone is detected (step S84, determination Yes), it is further determined whether or not the previous communication has been called again for the same reason (step S85). Here, if the call is re-issued for the same reason last time (step S85, judgment Yes), the call counter for the same reason is incremented (step S86).

Subsequently, it is determined whether or not the same reason recall counter ≧ the same reason recall limit setting value (step S87). Here, when it is determined that the same reason recall counter 16 is equal to or more than the same reason recall number limit set value (step S87, determination Yes), the recall interval is set to D (step S88), and the recall interval D is set. (Step S89, No). When the recall interval D has elapsed (step S89, judgment Ye)
s) The calling process is executed again.

On the other hand, if it is determined in step S85 that the previous time did not cause a recall for the same reason (step S85, determination No), or in step S87, the same reason recall counter 16 indicates the same reason recall limit. If the settings are not equal (step S87, judgment N
o), the recall interval is set to C (step S90), and the process stands by until the recall interval C elapses (step S91,
Decision No). When the recall interval C has elapsed (step S9)
1. Determination Yes), the call processing is executed again.

On the other hand, if no busy tone is detected in step S84 (step S84, judgment N
o) It is determined that the exchange is busy, for example, when a tone notifying that the exchange is busy (reorder tone in North America) is detected. If the call was re-issued for the same reason last time (step S92, judgment Yes), the same reason call counter is incremented (step S9).
3).

Subsequently, it is determined whether or not the same reason recall counter ≧ the same reason recall limit setting value (step S94). Here, when it is determined that the same reason recall counter 16 is equal to or greater than the same reason recall count limit set value (step S94, determination Yes), the recall interval is set to E (step S95), and the recall interval E is set. (Step S96, No). When the re-call interval E has elapsed (step S96, judgment Ye)
s) The calling process is executed again.

On the other hand, when it is determined in step S92 that the previous call was not a recall for the same reason (step S92, determination No), or in step S94, the same reason recall counter 16 indicates the same reason recall number limit. If the settings are not equal (step S94, judgment N
o), the recall interval is set to C '(step S97),
Wait until the re-call interval C 'has elapsed (step S9)
8, judgment No). When the re-call interval C 'has elapsed (step S98, determination Yes), the calling process is executed again (return to step S61 in FIG. 7).

The re-call interval A in the case where the connection is established with the other party but the communication is not completed normally does not mean that the other party is particularly busy. Therefore, there is a high possibility that connection can be established with the other party even if the call is immediately re-established. However, when a call is re-established due to a failure to connect to the other party, and the busy tone is detected, it is considered that the other party was busy. . Further, if a busy tone is not detected and a tone notifying that the exchange is busy is detected, the exchange is busy, and the call is connected to the other party even if a call is made until the exchange stops busy. It is impossible to do. Therefore, the setting of the recall interval is A
Has a small value, C has a large value, and C 'has a larger value. However, the value of A is a value that satisfies the minimum time of the re-call interval determined by the standard of each country. For example, it is preferable that A is set to 3 minutes, C is set to 10 minutes, and C 'is set to 15 minutes.

Further, if a re-call is made for a certain number of times for the same reason, the communication may not be completed normally again even if the re-call is made at the same interval. Therefore, if the call is repeated for a certain number of times for the same reason, the interval is set to be large. That is, B> A, E> C ′, D
> C. Further, it is assumed that the user can set the limit value of the number of times of re-calling for the same reason for changing the re-call interval when the re-call is made for the same reason via the operation display unit 6.

[0060]

As described above, according to the communication terminal apparatus of the present invention (claim 1), a plurality of parameters of different recall intervals are prepared, and the recall is transmitted from the destination apparatus. By selecting and changing from a plurality of recall intervals in accordance with the type of the response signal, a recall can be realized in accordance with the situation of the destination apparatus, and the number of unnecessary recall operations is reduced. In addition, there is an effect that it is possible to reduce the possibility that other communication operations, reception processing, and the like are hindered by useless recalls.

Further, according to the communication terminal device of the present invention (claim 2), when the response signal transmitted from the partner device receives a signal indicating that the communication has not been completed normally, When the call is connected but the communication is not terminated normally, the recall interval is not particularly busy, so it is considered that the callee or the exchange was busy even if the call was immediately recalled. It is highly likely that you will be busy again if you call immediately. Therefore, for example, an interval longer than the previous re-call interval is selected and changed from a plurality of preset re-call intervals, so that useless re-call operation in the case of abnormal termination cannot be suppressed.

Further, according to the communication terminal device of the present invention (claim 3), the first case where a call is made to the destination device and communication connection with the destination device is not possible, and the communication after communication connection with the destination device is established. In the second case where an error has occurred, since the return time before reconnection is different from itself, different recall intervals are selected and changed from a plurality of preset recall intervals, and recall is performed. Since a recall can be performed according to the situation of the destination apparatus, useless recall operation due to a normal recall and a communication error can be suppressed.

Further, according to the communication terminal device of the present invention (claim 4), a busy tone transmitted from the exchange when the other party device is busy and a reorder tone signal transmitted when the exchange is busy Is received, the busy tone and the reorder tone are selected different recall intervals, respectively.If a busy tone is detected, the other party is considered busy, and the call is immediately busy again. If the likelihood is high enough, but a busy tone is not detected and a tone that indicates that the exchange is busy is detected, the exchange is busy, and the call is made until the exchange becomes less busy. It is not possible to establish a connection with the other party even after performing the above procedure. , It is possible to re-call in accordance with the situation of the destination device. Therefore, since the standby time differs between the busy tone and the reorder tone, it is possible to appropriately select the corresponding recall interval.

Further, according to the communication terminal device of the present invention (claim 5), when a busy tone is detected from the exchange before calling the dial signal to the destination device, and after the dial signal is called, When the busy tone is detected, the re-call interval is set longer by detecting the busy tone after calling the dial signal than when the busy tone is detected from the exchange before calling, so that the other party and the In this case, the re-calling according to the situation is realized, so that unnecessary re-calling can be avoided in each case.

According to the communication terminal device of the present invention (claim 6), when the number of re-calls for the same reason (the same response signal) reaches a predetermined number, the state for the same reason continues for a long time. By changing the recall interval to a longer recall interval than the current status, an accurate recall can be realized when communication is not connected for the same reason, thus avoiding wasteful cases in which recall is continued for the same reason. be able to.

Further, according to the communication terminal device of the present invention (claim 7), the recalling interval for changing the recalling interval via setting means such as an operation display unit according to the user's preference or the communication state. Since the number of times is set, it is possible to correspond to the user's request and the use environment (communication status), thereby realizing a user-friendly setting.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a main configuration of a system control unit in FIG. 1;

FIG. 3 is an explanatory diagram showing an example of setting parameters of a call counter and a recall interval in the facsimile apparatus according to the embodiment of the present invention.

FIG. 4 is a flowchart showing a first operation procedure according to the embodiment of the present invention.

FIG. 5 is a flowchart showing a second operation procedure according to the embodiment of the present invention.

FIG. 6 is a flowchart illustrating a third operation procedure according to the embodiment of the present invention.

FIG. 7 is a flowchart showing a fourth operation procedure (1) according to the embodiment of the present invention.

FIG. 8 is a flowchart showing a fourth operation procedure (2) according to the embodiment of the present invention.

FIG. 9 is a flowchart showing a fourth operation procedure (3) according to the embodiment of the present invention.

[Description of Signs] 6 Operation display unit 7 System control unit 12 RAM 13 Timer 14 NVRAM 15 Call counter 16 Recall counter for the same reason 17-22 Recall interval

Claims (7)

[Claims] 1. A communication terminal device having an automatic recall function for automatically recalling when communicating with a destination device, wherein a plurality of parameters of a recall interval from a call to the next call are provided. And a control unit for selecting and changing one recall interval from the plurality of recall intervals in accordance with a response signal transmitted from the destination device. 2. The method according to claim 1, wherein the control unit changes the re-call interval when a response signal transmitted from the destination apparatus receives a signal indicating that communication has not been normally completed. The communication terminal device according to claim 1. 3. The apparatus according to claim 2, wherein the control unit sets a different re-call interval between the first case where the communication connection with the destination device cannot be established and the second case where a communication error occurs after the communication connection with the destination device. The communication terminal device according to claim 1, wherein the communication terminal device is selected. 4. The control means, when receiving a busy tone signal transmitted from an exchange when the destination apparatus is busy and a reorder tone signal transmitted when the exchange device is busy, receives the busy tone and the reorder signal. 2. The communication terminal device according to claim 1, wherein different recall intervals are selected for the order tone. 5. The control means according to claim 1, wherein the control unit determines whether the busy tone is detected from the exchange before calling the dial signal to the destination device, or the busy tone is detected after calling the dial signal. The communication terminal device according to claim 1, wherein a re-call interval is selected. 6. The communication according to claim 1, wherein said control means changes the recall interval when the number of recalls for the same reason reaches a predetermined number. Terminal device. 7. The communication terminal device according to claim 1, further comprising setting means for setting the number of recalls for changing the recall interval.