JPH04107040A - Data communication equipment - Google Patents

Abstract

PURPOSE:To realize a function to originate a call a proper number of times by providing a means where the destination number for call is temporarily stored, a means which discriminates cause information coming from the network side, and a selecting means which obtains redial information indicating a maximum frequency in call originating by an obtained cause code. CONSTITUTION:Data inputted from a key input part 6 is preliminarily stored in a file part 8, and the destination number is inputted from the part 6, and a call originating instruction signal and the destination number are sent to a network control part 3 by a main control part 2, and this control part 3 connects a call on the D channel through a network interface part 4 and an ISDN bus line 5. When call connection is completed, the control part 3 sends a call connection completion signal to the control part 2 and transmits data stored in the data file part 8 through the B channel after receiving a data transmission start instruction from the main control part 2 to transfer desired data to a desired destination terminal.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a data communication device that connects to an 15DN and transmits and receives various information.

[Conventional technology]

In recent years, various types of information have been frequently transmitted and received between data communication devices connected to an 15DN and other communication devices. In the 15DN, one control channel (D channel) and two information channels (B channel) can be used on one line, and calls are connected via the D channel, which allows the allocated B channel to be used. It is common to exchange various information via channels. By the way, when making a call, there are cases where there is no response from the other party's terminal or the call cannot be connected due to a temporary failure on the line side. FIG. 1O is a diagram showing an example of the D channel control procedure in such a case. When the 5ETUP signal 21, which is a call setup notification, is sent, a response signal DISC indicating that the called party cannot set up the call.
When receiving the signal 23, it outputs a REL signal instructing to disconnect the call and releases the call. In this way, when a call connection is not established normally, in conventional data communication devices, the operator has to perform the call operation again, for example, after a certain period of time has elapsed.

[Problem to be solved by the invention]

However, the conventional technology has the disadvantage that the operator has to repeat the call operation, which makes the operation complicated. Furthermore, even if a control method is adopted in which the device always automatically re-calls after a certain period of time has elapsed, there is a drawback that the re-call will occur even if, for example, the operator makes a mistake in the destination. In addition, even if the destination is not incorrect, the cause of the call failure may be a failure on the network side, which would require a considerable amount of time to recover, or the communication channel may be temporarily vacant. If there is no such thing, Hitsumugiku son-in-law 1-this number-m1 mouth□F
i'r fin fpfJjA□79)□4 kite n--ritsu Jt=
-Re-calling after a certain period of time was not an adequate response. Furthermore, there is a method in which the maximum number of times the call is repeated until the call is successful is determined in advance, and if the call is unsuccessful, the call is repeated up to that number of times. Since the maximum number of times is set as the maximum number of times, it is insufficient to deal with each factor.

[Means to solve the problem]

The present invention was made for the purpose of solving the above-mentioned problems, and includes the following configuration as one means for solving the above-mentioned problems. That is, in a data communication device that connects to an 15DN and transmits and receives data, a storage means for temporarily storing a destination number when a call is made, an identification means for identifying reason information arriving from the network side, and a selection means for obtaining redial information indicating the maximum number of times that re-calling is to be repeated from the reason code obtained; and calling means for automatically re-calling the destination number stored in the storage means the number of times indicated by the redial information. Alternatively, in a data communication device that connects to an 15DN and performs data transmission/reception, a storage means for temporarily storing a destination number when a call is made, an identification means for identifying reason information arriving from the network side, and the identification means selection means for obtaining redial information indicating the time until re-calling from the obtained reason code; and a selection means for calling the device having the destination number stored in the storage means and for obtaining redial information by the selection means when the call processing is unsuccessful. The apparatus is provided with a calling means for automatically re-calling the destination number stored in the storage means after a time indicated by the redial information has elapsed.

[Effect]

In the above configuration, the call is automatically made an appropriate number of times depending on the cause of the unsuccessful call, or after a period of time has elapsed before the call is made again, so that an appropriate response can be taken depending on the cause of the unsuccessful call. Additionally, it has become possible to repeat calls without operator intervention.

【Example】

DESCRIPTION OF THE PREFERRED EMBODIMENTS A data communication device according to an embodiment of the present invention will be described in detail below with reference to the drawings.

[First Embodiment] FIG. 1 is a block diagram of a data communication device according to a first embodiment of the present invention. This is the main control unit that controls the overall control of the device of this embodiment according to the control procedures and the like that will be described later. 3 is a network control unit that sends and receives various control signals and information to and from the 15DN via the D channel and B channel; 4 is located between the data communication device main body 1 and the 15DN bus line 5, and serves as an interface between the two. 6 is a key input section, 7 is a display section, 8 is a data file section for storing various data, and 9 is a redial system composed of, for example, a ROM and provided with a table consisting of reason codes and redial information in advance. The information section 10 is a destination storage section that stores the destination number when a call is made, and is composed of, for example, a RAM. Further, 11 is a data bus, and 13 is a counter section consisting of, for example, a RAM. In the above configuration, for example, data input from the key input unit 6 is stored in advance in the data file unit 8, and then a destination number is input from the key input unit 6, and the main control unit 2 3, the network control unit 3 sends a calling command signal and the destination number to the network interface unit 4, l5DN.
A call is first connected on the D channel via the bus line 5, and when the call connection is completed, a call connection completion signal is sent to the main control unit 2. After receiving a data transmission start command from the main control unit 2, the The data stored in file section 8 is
By transmitting via a channel, it becomes possible to transfer desired data to a desired destination terminal. Next, the detailed configuration of the destination storage section 10 will be explained with reference to FIG. As shown in FIG. 2, the destination storage unit 10 is a RAM having areas from addresses A0 to A. is the destination number length (L,) indicating the length (number of digits) of the destination number string
41, addresses A1 to As are destination number digits (D
, ~D, ) 42, and can store a maximum of N digits of destination number. Next, the detailed structure of the redial information section 9, which is an element of the selection means of this embodiment, will be explained with reference to FIG. As shown in FIG. 3, the redial information section 9
It is composed of a ROM having an area of 0 to B mm, and the value indicating the reason code coming from the network side is stored at address Bo+B.
2+..., Btu is assigned as the reason code area 51, and the addresses B+, Bs,...B 21141 are redial information (■) corresponding to the reason codes RO,..., RM, respectively. , ... Assign redial information area 5
Set it to 2. Processing of redial information. ,..., the value of Iv is, for example, "
If the value is ``O'', it is assumed that ``re-calling is not performed'', and if the value is other than ``0'', this value is a value indicating the upper limit of the number of times re-calling is repeated. The communication control of this embodiment having the above configuration will be explained below with reference to the flowchart of FIG. First, in step Sl, initialization processing such as setting the contents of the counter section 13 to "O" and clearing the contents of the destination storage section 10 is executed. The destination storage unit 10 is initialized by setting the content of the destination number length (Lo) 41 to "0". Next, in step S2, it is monitored whether or not there is a key input on the key input section 6 indicating a call request. If a key input indicating a call request is made here, the process advances to step S3, and the destination number subsequently input from the key input section 6 is stored in the destination storage section 1o. At this time, the numbers are stored in DI, D2°, etc. in order from the highest number, and each time one digit is stored. Increment the contents by one. These manually entered destination numbers are sequentially displayed on the display section 7 so that the input status can be confirmed. Next, the process advances to step S4, and in step s3, the destination storage unit 1
5ETU requesting call setup with destination number stored in 0
The P signal 21 is sent out via the network control unit 3, the network interface unit 4, and the l5DN bus line 5, and a response from the desired destination is waited for.When a response from the l5DN is received, it is first received in step S5. It is checked whether the received signal is a DISC signal indicating that the call setup is not successful. If the DISC signal is not received, it is checked in step S9 whether or not a C0NN signal indicating that the call setup has been successfully performed is received. The C0NN signal may have been received (if an inappropriate signal is received or a response wait timeout occurs, proceed to step S12 and perform abnormal processing.On the other hand, if the received signal is a DISC signal If so, the process advances from step S5 to step S6, and the DI shown in FIG.
The content of the reason information that arrives according to the SC signal frame format is analyzed and the reason code is extracted. Then, the same value as the reason code extracted in the subsequent step S7 is searched from R0 to RM in the redial information section 9, and the corresponding redial information I is generated. Read the value (0≦n≦M). Then, the value of the redial information (I
o) and the count contents of the counter unit 13, (1,
)≦(counter value), give up on setting up the call and step S1
Return to On the other hand, if (1,) > (counter value), the contents of the counter section 13 are incremented and the process returns to step S4, where the above procedure is repeated and the call resetting process is continued until the call is set up. This is repeated for the number of redial information I7 read out. On the other hand, if a C0NN signal is received as a response signal, the process advances from step S9 to step SIO, and in this case, since the call setup with the other party is completed, data transmission processing is performed. When the data transmission process is completed, step Sl
The process proceeds to step s1, where the call is disconnected and the process returns to step s1. According to the control procedure described above, for example, values indicating "no available channel" and "general user busy" are stored in advance in (R,) and (R,) of the redial information section 9, respectively, and (Io ), (II)! : The values 1 and 3 are stored in advance, respectively (by this, when the reason code value analyzed in step S6 is a value indicating "no available channel", the value indicating "received user busy" is stored at most once). In this case, it is possible to automatically re-call the same destination up to three times. In addition, Fig. 5 is a diagram showing the frame format of 1iDISC (No. 8), and in Fig. 5, 3o is the DISC signal 23. 31 is the message type CM indicating that this message is a DISC message), 32 is an information element identifier, and this information element is the reason information. An identifier (Pi) indicating that
is a length indicator (Li) indicating the length of the subsequent information element, and 34 is an information section (34) consisting of a known format including a reason code.
Pv). As explained above, according to this embodiment, the re-call is automatically performed an appropriate number of times depending on the cause of the unsuccessful call.
An appropriate response can be taken depending on the cause of the call failure. That is, at least a storage means for storing the destination number when the call is unsuccessful, an identification means for identifying the reason information coming from the network side, and redial information indicating whether or not to call again is obtained from the reason code obtained by the identification means. The burden on the operator is reduced by providing a selection means and a means for automatically re-calling the destination terminal of the destination number stored in the storage means until the call is successfully made up to the number of times obtained by the selection means as an upper limit. At the same time, it is possible to implement a function that re-calls an appropriate number of times, without wasting time (and depending on the cause of the unsuccessful call).

[Second Embodiment] In the first embodiment described above, the redial information unit 9 was configured by ROM and was used as a component of the selection means for re-calling or not. It is also possible to use RAMs with the same configuration. In this case, as a control procedure for presetting redial information, for example, a procedure for setting redial information corresponding to each reason code using a known conversational format using the key input section 6 and display section 7. may be stored in the main control section 2 and executed before performing the control shown in FIG. In this way, by allowing redial information to be input from the key input unit 6, it is possible to appropriately respond to changes in the system, and changes in the interface specifications between network terminals (
Even when connecting to an overseas network (for example, when connecting to an overseas network), the contents of the redial information section can be easily changed, making the device highly versatile. [Third Embodiment] In addition, the redial information section 9 is configured by ROM,
If the RAM is used instead of as a component of the means for selecting whether or not to re-call, it is difficult for those who are not familiar with the operation to enter the redial information from the key input section 6 one by one to set the redial information in advance. It's a hassle. Therefore, if this input is performed using an OCR reading section, the above-mentioned redial information can be inputted very easily. FIG. 6 shows a block configuration of a third embodiment of the present invention in which input of redial information is made possible by OCR in this manner. In FIG. 6, the same components as in FIG. 1 are given the same numbers, and detailed explanations are omitted. The third embodiment shown in FIG. 6 has a structure in which an OCR reading section 12 is added to the structure of the first embodiment shown in FIG. In this embodiment, the data communication device 1 is provided with an OCR reading section 12, and the redial information section 9 is configured with a RAM, so that reason codes and numerical values representing information on whether to re-call or not are stored in the OCR sheet in advance. The filled-in OCR sheet is read by the OCR reading section 12, and the analyzed contents are stored in the redial information section 9. The above processing may also be performed before executing the processing shown in FIG. 4 described above. The reading control from the OCR reading unit 12 and the storage control in the redial information unit 9 are well known, and detailed explanations thereof will be omitted.

[Fourth embodiment] Furthermore, an external storage device such as an IC card reader or a floppy disk drive is connected in place of the OCR reading section 12,
It is also possible to configure the selection means by downloading the redial information to the redial information section 9 by using a medium storing the redial information. In this case, O
Instead of the CR reading section 12, an IC card reader or an external storage device may be connected. As a result, once redial information is input and stored, similar redial information can be easily stored in other devices. In addition, when an external storage device is connected, the data communication device main body 1 does not include the redial information section 9 (although it may be configured to read redial information from the external storage device when the information is required). As a result, the redial information section of the device main body 1 can be omitted, and the device configuration can be simplified.

[Fifth Embodiment] The above explanation describes an example in which the maximum number of re-calls is obtained from redial information, but depending on the reason for the failure of call processing, the time until call connection is possible varies. . Therefore, by determining the time until re-calling based on the cause of the unsuccessful call connection using redial information and re-calling after the elapse of the determined time, call connection control with less possibility of failure can be performed. Ru. A fifth embodiment of the present invention will be described below, in which the time until call connection is possible is determined based on the reason why the call processing has failed. FIG. 7 is a block configuration diagram of a fifth embodiment according to the present invention, and the same components as in FIG. 1 described above are given the same numbers and detailed explanations are omitted. The difference in FIG. 7 from the first embodiment shown in FIG. 1 is that a timer circuit 21 is provided in place of the counter circuit 13 in FIG. Note that even if the counter circuit 13 of FIG. 1 is also provided and the control described below is added to the control of the first embodiment, the counter circuit 13 is deleted as shown in FIG. may be controlled so as not to be performed. This is because if the time until re-calling is managed, there is a high possibility that the call will be connected in the next re-calling process.
This is because there is less possibility of having to repeat the re-calling process. The timer circuit 21 in FIG. 7 is a circuit that notifies the main control unit 2 of the elapse of a set time. The contents of the other redial information section 9 and destination storage section 10 are the same as those shown in FIGS. 2 and 3 above. however,
When the redial information in the redial information area 52 of the redial information section 9 is "O", it is a case in which r re-calling is not performed, and when it is other than "O", as in the above-mentioned embodiment, (indicating the number of re-calls) The difference is that it represents the time interval until re-calling, rather than the time interval until re-calling. The control of the fifth embodiment having the above configuration will be explained below with reference to the flowchart of FIG. 8. First, step S21 Initialization processing such as clearing the contents of the destination storage unit 10 is executed at .The destination storage unit 10 is initialized by setting the content of the destination number length (L.) 41 to “0”.Next, In step S22, it is monitored whether or not there is a key input indicating a call request on the key input unit 6. If a key input indicating a call request is made here, the process advances to step S23, and the key input unit 6 continues to press the key input indicating a call request. The destination number input from the input unit 6 is stored in the destination storage unit 10 in the same manner as step S3 in FIG. 5E to request settings
The TUP signal 21 is sent to the network control unit 3, network interface unit 4,
and 15DN bus line 5, and waits for a response from the desired destination. When a response from the 15DN is received, it is first checked in step S25 whether or not the received signal is a DISC signal indicating that the call setup is unsuccessful. If the DISC signal is not received, it is checked in step S35 whether or not a C0NN signal indicating that the call setup has been successfully performed is received. If the C0NN signal is not received but an inappropriate signal is received or a response wait timeout occurs, the process advances to step S40 and abnormality processing is performed. On the other hand, if it is the DISC signal that has been received, the process proceeds from step S25 to step 326, and the fifth
The content of the reason information that arrives is analyzed according to the DISC signal frame format shown in the figure, and the reason code is extracted. Then, a search is made from R0 to R2 of the redial information section 9 that has the same value as the reason code extracted in the subsequent step S27,
The value of redial information I (0≦n≦M) corresponding to this is read out. If the value (r,) of the redial information read in step S28 is "O" and the call is not to be made again due to difficulty in recovery, etc., the process returns to step S21. On the other hand, if (In) is not "0", in order to perform a re-call, the process proceeds to step S29, where () is set in the timer section 21 to indicate the time until the re-call, and the timer is activated. Then, in step S30, the timer section 21 waits for a time-up notification, and when the time has elapsed and the time determined by (I, . . . ) has elapsed, the process returns from step S30 to step S24 to perform the re-calling process. On the other hand, if a C0NN signal is received as a response signal, the process advances from step S35 to step S36, and in this case, the call setup with the other party is completed, so data transmission processing is performed. When the data transmission process is completed, a call disconnection process is performed in step S37, and the process returns to step S21. According to the control procedure described above, for example, values indicating "network failure" and "received user busy" are stored in advance in (Ro) and (R1) of the redial information section 9, respectively.
By storing in advance a value of 3.1 in each of This makes it possible to automatically call the same destination again after a different amount of time has elapsed. This craft. There is a fixed relationship between the value of I and the time-up time; for example, "1" in I corresponds to one minute. As explained above, according to the present embodiment, the cause and reason of the failure of the call connection can be known from the redial information, the time until re-calling can be determined based on the redial information, and the re-call can be performed after the elapse of the determined time. This reduces the burden on the operator and allows call connection control to be performed with less possibility of failure. [Sixth Embodiment] In the above explanation, the case where the redial information section 9 is configured with a ROM has been described, but similarly to the second and third embodiments, the information section 9 is not a ROM but a rewritable RAM or the like. The redial information is registered in the same manner as in the second embodiment (
Even if you manually press the key input unit 6, you can also use OCR.
It may be configured such that the reading section performs the reading. In particular, if the OCR reading unit is used, the redial information can be entered very easily. FIG. 9 shows a block configuration of a sixth embodiment of the present invention in which input of redial information is made possible by OCR in this manner. In FIG. 9, the same components as in FIG. 7 are given the same numbers, and detailed explanations are omitted. In the sixth embodiment shown in FIG. 9, an OC similar to that shown in FIG. 6 is added to the configuration of the fifth embodiment shown in FIG.
This is a configuration in which an R reading section 12 is added. In this embodiment, the data communication device 1 is provided with an OCR reading section 12, and the redial information section 9 is configured with a RAM, so that reason codes and numerical values representing information on whether to re-call or not are stored in the OCR sheet in advance. The filled-in OCR sheet is read by the OCR reading section 12, and the analyzed contents are stored in the redial information section 9. The above processing may also be performed before executing the processing shown in FIG. 8 described above. The reading control from the OCR reading unit 12 and the storage control in the redial information unit 9 are well known, and detailed explanations thereof will be omitted.

[Seventh Embodiment] Furthermore, instead of the OCR reading section 12, an external storage device such as an IC card reader or a floppy disk drive similar to that of the fourth embodiment may be connected to use a medium storing redial information. It is also possible to configure the selection means by a method of downloading the information to the redial information section 9 by using the above method. In this case, instead of the OCR reading section 12, an IC card reader or an external storage device may be connected. As a result, once redial information is input and stored, similar redial information can be easily stored in other devices. In addition, when an external storage device is connected, there is no need to include the redial information section 9 in the data communication device main body 1, and the external storage bag can be used when the information is needed. It is also possible to configure the system to read more redial information. As a result, the redial information section of the apparatus main body 1 can be omitted, and the equipment configuration can be simplified. [Effects of the Invention] As described in detail above, according to the present invention, the burden on the operator is reduced, the time is not wasted, and the call repeats only an appropriate number of times depending on the cause of the unsuccessful call. It has become possible to realize the function of calling. Furthermore, depending on the cause of the call failure, re-calling can be performed after an appropriate period of time has elapsed, and call connection control can be performed to reduce the possibility of repeating re-calls.

[Brief explanation of drawings]

Figure 1 shows the first embodiment of the present invention made by data communication! 2 is a diagram showing an example of the detailed configuration of the destination number storage section shown in FIG. 1; FIG. 3 is a diagram showing an example of the detailed configuration of the redial information section shown in FIG. 1; FIG. 5 is a flowchart showing an example of the control procedure of the first embodiment, FIG. 5 is a diagram showing an example of the frame format of the DISC message and the reason information included therein, and FIG. 6 is a flowchart showing an example of the control procedure of the first embodiment. FIG. 7 is a block diagram of a data communication device according to a fifth embodiment of the present invention; FIG. 8 is a flowchart showing an example of a control procedure of the fifth embodiment; FIG. 10 is a block diagram of a data communication device according to a sixth embodiment of the present invention. FIG. 10 is a diagram showing an example of a sequence when call setup is unsuccessful in an rsDN call setup sequence. In the figure, 1... Data communication device main body, 2... Main control section, 3... Network control section, 4... Network interface section, 5
...l5DN bus line, 6...key input section, 7...
・Display section, 8... Data file section, 9... Redial information section, 10... Destination information storage section, 11... Data bus, 12... OCR reading section, 13... Counter section , 21... is a timer section. Above, - Figure 1 Figure 1 Cape side map] ○ Figure 4-'f Iriri Figure Figure

Claims (6)

[Claims] (1) In a data communication device that connects to an ISDN and sends and receives data, it includes a storage means for temporarily storing a destination number when a call is made, an identification means for identifying reason information arriving from the network side, and the identification means. a selection means for obtaining redial information indicating the maximum number of times to repeat the re-call from the reason code obtained by the above; 2. A data communication device comprising calling means for automatically re-calling a destination number stored in said storage means the number of times indicated by the redial information received. (2) In a data communication device that connects to an ISDN and sends and receives data, it includes a storage means for temporarily storing a destination number at the time of a call, an identification means for identifying reason information arriving from the network side, and the identification means. selection means for obtaining redial information indicating the time until re-calling from the reason code obtained by the method; 1. A data communication device comprising: a calling means for automatically calling again to a destination number stored in said storage means after a time period indicated by redial information has elapsed. (3) The data communication device according to claim 1 or 2, wherein the selection means obtains the redial information by referring to a table in which sets of reason codes and redial information are stored in advance. (4) The data communication device according to claim 3, further comprising an OCR reading section, and reading an OCR sheet in which a set of reason code and redial information is written in advance to the OC.
A data communication device characterized in that data is read by an R reading section and stored in a table. (5) The data communication device according to claim 3, further comprising a key input section, through which redial information is input in combination with a reason code, and the input redial information and reason code are input. A data communication device characterized by storing data in groups in a table. (6) The data communication device according to any one of claims 3 to 5, wherein the table is provided in an external storage device.