JP2004120446A - Communication terminal unit, its communication control method, and its communication control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a communication terminal unit that receives electronic mail by automatically calling back a center performing electronic mail communication services in response to the calling from the center accompanied with a notice indicating the recovery of the mail by calling back to avoid the time out of the calling back to the utmost. <P>SOLUTION: When an incoming call (calling) arrives (step S31), and the information on the telephone number of the call originator meaning the notice indicating the recovery of the mail by calling back sent from the center is detected (S32), and then, when the telephone number agrees with the preregistered number of the center (S33), the communication terminal unit generates the information on the originating call for calling back the center by preserving the additional information sent from the center (S34), and inserts the information into the forefront of a call originating queue set in a memory (S35). Thereafter, the terminal unit originates calls from the call originating phenomenon inserted into the forefront of the queue by performing call originating processing. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a communication terminal device for performing e-mail communication and other predetermined data communication via a communication network, wherein the call is accompanied by notification of an e-mail collection instruction by a callback from a center that provides an e-mail communication service. The present invention relates to a communication terminal device that automatically calls back to the center and receives an e-mail according to the communication terminal device, a communication control method thereof, and a communication control program thereof.
[0002]
[Prior art]
In recent years, portable terminal devices that can handle not only a telephone function for transmitting voice but also e-mail have exploded. Also, in a facsimile apparatus and the like, Non-Patent Document 1 proposes, for example, a system that can handle electronic mail using a service provided by a provider.
[0003]
In the system according to this proposal, mail is transmitted and received between two message terminal devices (hereinafter, abbreviated as SM_TE) via a PSTN (general public line network) or an ISDN (integrated digital communication network) by the following procedure. I do. First, the transmitting SM_TE temporarily sends a mail to a message service center (hereinafter abbreviated as SM_SC) and requests distribution to the receiving SM_TE. The SM_SC that received the request has the sender's telephone number information (Caller ID) including its own telephone number and additional information as a notification to the receiving SM_TE that the mail has arrived and an instruction to collect the mail. The call is made using the service of the communication network. Upon receiving the call having the caller telephone number information, the receiver SM_TE compares the SM_SC telephone number included in the caller telephone number information with the SM_SC telephone number registered in the receiver SM_TE in advance. Then, it is determined whether or not they match. At this time, the receiving SM_TE does not need to respond to the call. If they match and the additional information indicates that the mail is to be collected by callback, the receiving SM_TE similarly adds the additional information to the registered SM_SC telephone number. Then, it calls back and receives a desired mail from SM_SC.
[0004]
If the receiving SM_TE cannot call back during the predetermined time, the receiving SM_TE discards the previously notified mail collection instruction and waits for the notification of the collection instruction sent from the SM_SC again. This is to prevent inconsistency in the distribution / collection state between the distribution side SM_SC and the reception side SM_TE.
[0005]
[Non-patent document 1]
ETSI (European Telecommunications Standards Institute) ES 201 912
[0006]
[Problems to be solved by the invention]
Here, consider a case where the receiving side SM_TE has a facsimile communication function in the above system. The facsimile transmission request by the user is generated irrespective of the previous mail collection instruction. That is, it is possible to assume a situation in which a mail collection instruction is sent when the receiving SM_TE is about to perform facsimile transmission. Of course, even in this case, the SM_TE can perform the facsimile transmission earlier, ignoring the mail collection instruction by the SM_SC.
[0007]
However, if the facsimile transmission is performed first ignoring the mail collection instruction, the following problem occurs.
[0008]
In this case, since the time required for facsimile transmission is indefinite, there is a high possibility that a callback cannot be made during a predetermined time. That is, despite receiving the mail collection instruction from SM_SC, the instruction must be discarded. Further, in order to receive the mail, it is necessary to wait for a notification of a mail collection instruction from the SM_SC by retry (retry) again. In the above system, if the limit of the number of retries of the notification of the mail collection instruction is defined in the SM_SC, the number of retries is exceeded during facsimile transmission. , You will not be able to receive mail.
[0009]
Further, from the SM_SC side, as the number of accommodated SM_TEs increases, if the SM_TE frequently causes a callback timeout, the cost required for retrying the notification of the collection instruction increases.
[0010]
The present invention has been made in view of the above problems, and a problem thereof is to provide a communication terminal device that performs e-mail communication and other predetermined data communication via a communication network, and provides an e-mail communication service. In response to a call accompanied by notification of an e-mail collection instruction by a callback from the center, a call is automatically made to the center, and the communication terminal device that receives the e-mail receives the e-mail collection instruction from the center. The purpose of the present invention is to minimize the time-out of emails and ensure that e-mails can be received.
[0011]
[Means for Solving the Problems]
To solve the above problems, according to the present invention,
A communication terminal device that performs e-mail communication and other predetermined data communication via a communication network, and in response to a call accompanied by notification of an e-mail collection instruction by a callback from a center that performs an e-mail communication service, In a communication terminal device that automatically calls back to the center and receives an e-mail,
When there is a call accompanied by notification of an e-mail collection instruction by the callback from the center, if a transmission event to a center other than the center is in a standby state, transmission of the callback to the center is preferentially performed. A configuration having control means for controlling is adopted.
[0012]
In addition, the communication control method of the communication terminal device and the configuration of the communication control program corresponding to this configuration are employed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Here, as the communication terminal device, according to the protocol described in Non-Patent Document 1 described above, the center responds to a call accompanied by notification of a mail collection instruction by a callback from SM_SC (message service center) that performs an electronic mail communication service. 1 shows an embodiment of an SM_TE (message terminal device) having a function of receiving an electronic mail by automatically calling back to a communication terminal device having a facsimile communication function.
[0014]
FIG. 1 is a block diagram illustrating a configuration of a communication terminal device according to an embodiment of the present invention.
[0015]
A communication terminal device (hereinafter abbreviated as terminal) 100 is connected to a PSTN (general public line network) via a line. The center (SM_SC) 120 is connected to an ISDN (Integrated Services Digital Network). The PSTN and the ISDN are interconnected by a communication carrier. In FIG. 1, for convenience, the two networks are collectively expressed as PSTN / ISDN and denoted by reference numeral 110. The terminal 100 and the center 120 can exchange electronic mail via the PSTN / ISDN 110. In addition, the center 110 of the present embodiment is also connected to the Internet 130, and can mediate exchange of e-mail between an information terminal or the like (not shown) connected to the Internet 110 and the terminal 100. Note that the number of SM_SCs connected to the PSTN / ISDN 110 and allowing the terminal 100 to receive the e-mail communication service is not limited to one of the centers 120.
[0016]
The terminal 100 is composed of the following modules 101 to 109 connected to each other by a bus B.
[0017]
The CPU 101 transfers a part of the DRAM 104 to a work area based on a communication control program for facsimile communication and data communication stored in the ROM 102, a control program for display and recording, and various software parameters stored in the flash RAM 103. The terminal 100 is used to control the entire terminal 100. The flash RAM 103 can keep its contents even when the main power is turned off, and stores various data such as e-mail contents and incoming melody in addition to the above parameters. Also, information such as the telephone number of the SM_SC of the center 120 where the terminal 100 receives the e-mail service is registered. The DRAM 104 is used as a buffer area for storing a facsimile image in addition to the work area.
[0018]
The display unit 105 includes a small color liquid crystal display, an accelerator for realizing high-speed drawing, and the like. The display unit 105 displays a facsimile image stored in the DRAM 104 and displays the contents of an e-mail. In addition, a sound source device and the like are provided, and a ringtone melody can be reproduced.
[0019]
The reading unit 106 includes a color contact sensor, an automatic document feeder, a gate array for performing image processing on the read image data, and the like, and scans a color original to generate color image data. Of course, it is also possible to generate monochrome image data. The generated image data is temporarily stored in the DRAM 104 and transmitted by facsimile via the communication unit 109, or transferred to the recording unit 107 and copied (printed) as a color image on recording paper.
[0020]
The recording unit 107 includes a color printer such as an inkjet system, an image processing device for recording, and the like, and prints not only monochrome but also color facsimile images on recording paper, or prints the contents of e-mail. Or you can.
[0021]
The operation unit 108 includes a number key, a cursor key, a start key, a stop key, and some LEDs indicating the state of the terminal 100, and the like. The user can use the numeric keys to make a call to an arbitrary party, use the cursor keys and the start key to select various menus, and instruct operations such as facsimile transmission.
[0022]
The communication unit 109 includes a facsimile modem and a data modem, a network control unit (NCU) including a relay and a transformer for connecting the terminal 100 to the PSTN / ISDN 110, and the like. A telephone call is made to a number, facsimile communication and data communication, and further, an electric signal is modulated and demodulated so as to correspond to FSK modulation described in Non-Patent Document 1.
[0023]
Next, FIG. 2 is an explanatory diagram showing the configuration of tasks and data flow relating to facsimile image communication and mail communication in the terminal 100 shown in FIG. A processing program for each task is stored in the ROM 102 shown in FIG.
[0024]
An image pool 211 in FIG. 2 is used to store image data of a document read for facsimile transmission and image data received by facsimile transmission, and is prepared on the flash RAM 103.
[0025]
The transmission queue 212 is a queue of information on transmission events in a standby state, and is stored in a predetermined storage area of the DRAM 104. As will be described later, the information of the outgoing event that is called back to the SM_SC such as the center 120 to collect the e-mail is inserted at the head of the outgoing queue 212, but the information of other normal outgoing events such as facsimile transmission is , In the order in which they are generated, and are placed at the end of the transmission queue 212.
[0026]
2, tasks 201 to 210 are managed and executed by a real-time monitor mounted on the terminal 100. Each task exchanges messages using the inter-task communication function of the real-time monitor, and operates as follows.
[0027]
The operation control task 201 monitors the operation unit 108 illustrated in FIG. 1 and accepts a user's request for facsimile transmission reservation. When a request for transmission reservation is made by the user, the operation control task 201 sends a message requesting reading of the document to the reading control task 202.
[0028]
The reading control task 202 receives the document reading request message from the operation control task 201, controls the reading unit 106 shown in FIG. 1, and transports one of the documents set on the platen of the apparatus to a predetermined reading position. And start reading. Each time reading of one scanning line is completed, a message requesting encoding of image data of the same scanning line is sent to the reading encoding processing task 203.
[0029]
Upon receiving the encoding request message from the reading control task 202, the reading encoding task 203 encodes the image data of the designated scanning line, and returns the result to the reading control task 202 as a message.
[0030]
The reading control task 202 sequentially stores the encoded data from the reading encoding processing task 203 in an image pool 211 prepared on the flash RAM 103 while using the DRAM 104 shown in FIG. 1 as a buffer. When reading of all the documents set on the document table is completed, the operation control task 201 is notified of the completion of the reading.
[0031]
Upon receiving the read completion notification from the read control task 202, the operation control task 201 sends, to the transmission queue 212 prepared in the DRAM 104, information on correspondence with the actual coded data stored in the image pool 211 and transmission The information of the outgoing event including information such as the telephone number of the destination (destination) is put at the end of the queue. Note that the operation control task 201 generates outgoing event information in accordance with a previous input of a telephone number of the user or the like.
[0032]
The line control task 204 monitors the transmission queue 212 periodically. The line control task 204 mainly exchanges messages with the line processing task 206 which controls the NCU mounted on the communication unit 109 shown in FIG. The incoming call status from the line is also monitored regularly.
If the transmission queue 212 has information on the transmission event waiting to be transmitted, information on the head transmission event in the transmission queue 212 is extracted, and the transmission processing is performed while exchanging messages with the line processing task 206. Subsequently, the message is exchanged with the FAX communication control task 205 or the E-mail communication control task 209 according to the outgoing event to start the FAX communication or the E-mail communication. On the other hand, if an incoming call from the line is detected, a message is exchanged with the FAX communication control task 205 or the mail communication control task 209 to start the FAX communication or the mail communication depending on the type of the incoming call and the terminal setting. Alternatively, information on the event of the callback to the SM_SC is generated and put into the head of the transmission queue 212. The details will be described later.
[0033]
The FAX communication processing task 207 mainly controls a modem mounted in the communication unit 109 shown in FIG. 1 based on the instruction of the FAX communication control task 205 to control the ITU-TT. The procedure for facsimile transmission of 30 recommendations is executed. At the same time, the FAX communication processing task 207 exchanges messages with the encoding / decoding processing task 208, and transmits the encoded image data stored in the image pool 211 from the FAX communication control task 205 as needed for transmission. The data is received, decoded / encoded according to the request of the partner terminal, and transmitted to the transmission path. If the data is received, the data received from the transmission path is decoded / encoded by the encoding / decoding processing task 208, and the data is passed to the FAX communication control task 205 and stored in the image pool 211.
[0034]
On the other hand, the mail communication control task 209 exchanges messages with the mail communication processing task 210 for sending and receiving e-mails, and communicates with the SM_SC such as the center 120 shown in FIG. 1 according to the protocol described in Non-Patent Document 1. Manage the exchange of email data between
[0035]
The mail communication processing task 210 actually exchanges mail data with the center 120 according to the instruction of the mail communication control task 209 while mainly controlling the modem mounted on the communication unit 109 shown in FIG. .
[0036]
Next, FIG. 3 is a flowchart illustrating a control procedure of an incoming call process in the terminal 100 of the present embodiment. The incoming call process is one of a plurality of processes executed by the line control task 204 shown in FIG. 2, and is performed as follows in accordance with the control procedure of the communication control program of the line control task 204.
[0037]
First, in step S31, the monitoring result of the call cadence from the PSTN / ISDN 110 line by the line processing task 206 shown in FIG. 2 is acquired, and it is determined whether there is an incoming call (call). If there is an incoming call, the process proceeds to step S32. If there is no incoming call, the incoming call processing is immediately terminated, and processing other than incoming call, such as the outgoing call processing of FIG. 4 described later, can be executed as necessary. If there is no other situation, the operation is performed so that step S31 is repeated again after a certain time has elapsed.
[0038]
In step S32, it is determined whether valid caller telephone number information (Caller ID) has been detected by the line processing task 206 shown in FIG. 2 (caller ID), and if it has been detected, the process proceeds to step S33. Otherwise, the process proceeds to step S36.
[0039]
In step S33, the telephone number of the SM_SC stored in advance in the flash RAM 103 shown in FIG. 1 and the telephone number of the SM_SC included in the notified caller telephone number information are compared to determine whether they match. Here, a diagram showing the configuration of the caller telephone number information notified from the SM_SC is extracted from Non-Patent Document 1 and shown in FIG. As shown here, since the portion of the caller telephone number information excluding the lower two digits of additional information is SM_SC telephone number data, the comparison in step S33 is based on the notified caller telephone number information. This is done excluding the last two digits. If they match, the process proceeds to step S34; otherwise, the process proceeds to step S36.
[0040]
In step S34, the information of the called device subaddress (Called SME Subaddress) and the distribution mode identifier (Deliver Mode Identifier) added to the caller telephone number information notified from the SM_SC are transmitted to the SM_SC. The information is stored as a part of the event information, and the information of the callback transmission event to the SM_SC is generated, and the process proceeds to step S35.
[0041]
In step S35, regardless of whether or not there is already an outgoing event in the outgoing queue 212 shown in FIG. 2, the information of the outgoing event to the SM_SC generated in step S34 is inserted into the head of the outgoing queue 212 to receive the incoming call. The process ends. FIG. 6 shows an example of the input. In FIG. 6, in a state in which information I1 to I3 of three outgoing events related to facsimile whose communication numbers are 0001 to 0003 have already been put in the outgoing call queue 212, the outgoing event to the SM_SC whose communication number is 0004 is A state in which information I4 is put at the head of the transmission queue 212 is shown. The information of each outgoing event is composed of information such as the communication number, the purpose of outgoing call, and the destination telephone number as shown in the upper left corner. Includes information on sub-address and distribution mode identifier. Here, they are "1" and "2", respectively, but the latter "2" indicates that the mode is to receive mail distribution by callback. That is, the notification of the caller telephone number information including this data is a notification of an e-mail collection instruction by callback. In the processing of FIG. 3, the caller telephone number information from the SM_SC whose telephone number is registered in the flash RAM 103 has a distribution mode identifier of “2”, and the notification is a notification of a collection instruction by a callback. Is assumed.
[0042]
On the other hand, in step S36, normal incoming call processing is performed. For example, if the incoming call setting of the terminal 100 is set for exclusive use of facsimile reception, after automatically capturing the line, the facsimile reception control is requested to the facsimile communication control task 205 shown in FIG. The incoming call processing ends.
[0043]
Next, FIG. 4 is a flowchart illustrating a control procedure of an incoming call process in the terminal 100 of the present embodiment. The transmission process is one of a plurality of processes executed by the line control task 204 shown in FIG. 2, and is performed as follows according to a control procedure of the communication control program of the line control task 204.
[0044]
First, in step S41, it is determined whether or not there is information on an event waiting to be transmitted in the transmission queue 212 described in FIG. 2, and if there is, the process proceeds to step S42. Enables processing other than outgoing calls, such as incoming call processing. If there is nothing else, step S41 is repeated again after a certain time has elapsed.
[0045]
In step S42, it is determined whether or not the information on the outgoing event at the head of the outgoing call queue 212 is the information on the outgoing event to the SM_SC (for example, the center 120).
If the event is a transmission event to SM_SC, the process proceeds to step S43; otherwise, the process proceeds to step S45.
[0046]
In step S43, while exchanging messages with the line processing task 206, the information of the called device subaddress and the distribution mode identifier stored in step S34 of FIG. 3 in the telephone number of the SM_SC according to the protocol described in Non-Patent Document 1. To the SM_SC. For example, in the case of transmitting a transmission event (information I4) to the SM_SC shown in FIG. 6, the transmission is performed by adding the called device subaddress 1 and the distribution mode identifier 2 after the telephone number 010800xxxxxx1111 of the SM_SC. . If the transmission has been completed normally, the process proceeds to step S44.
[0047]
In step S44, the e-mail communication control task 209 shown in FIG. 2 requests the e-mail collection processing to end the transmission processing. The mail communication control task 209 receiving the request exchanges messages with the mail communication processing task 210, communicates with the SM_SC (for example, the center 120) according to the protocol described in Non-Patent Document 1, and collects a desired mail. I do.
[0048]
On the other hand, in step S45, normal transmission processing is performed, and then, in step S46, normal communication is activated, and the processing ends. For example, if the outgoing event at the head of the outgoing call queue 212 is a facsimile outgoing event, the outgoing event is transmitted using the telephone number (facsimile number) information of the outgoing event in step S45, and then transmitted to the FAX communication control task 205 in step S46. Request facsimile communication. The FAX communication control task 205 having received the request exchanges a message with the FAX communication processing task 207, and transmits the message to the ITU-TT. Facsimile communication is performed according to the facsimile transmission procedure of 30 Recommendations.
[0049]
According to the present embodiment as described above, at the terminal 100, when receiving (calling) from the PSTN / ISDN 110 line, the notification of the caller telephone number information from the SM_SC, that is, the collection instruction by the callback of the electronic mail. When the notification is received, information on the transmission event of the callback to the SM_SC for collecting the mail is generated and inserted into the head of the transmission queue 212, and the transmission event is immediately transmitted. That is, even if there is information on an outgoing event to other than the SM_SC such as facsimile transmission in the outgoing call queue 212, that is, even if there is an outgoing event to the other than the SM_SC, the outgoing call to the SM_SC is prioritized. And do it. Therefore, even if an outgoing event to other than the SM_SC is in a standby state, the callback to the SM_SC can be performed in a short time, and the reception of the e-mail can be surely received while the timeout of the callback is minimized. Can be.
[0050]
In addition, for the SM_SC such as the center 120 that provides an electronic mail distribution service to the terminal 100, the time-out of the callback from the terminal is reduced, so that the number of times of retrying the notification of the collection instruction is reduced, and the cost required for the retry is reduced. Can be suppressed.
[0051]
[Other embodiments]
In the embodiment described above, only one transmission queue 212 is used so that transmission of a callback to the SM_SC for e-mail collection can be preferentially performed.
[0052]
On the other hand, in the configuration of the above embodiment, at least two or more outgoing queues having different priorities are prepared, for example, on the DRAM 104, and in step S35 of the incoming call process in FIG. The information of the transmission event of the callback to the SM_SC is put into the transmission queue having the highest priority among the plurality of transmission queues (in this case, it is not necessary to be at the head of the queue). In the transmission process, the same effect can be obtained by performing the transmission process sequentially from the top transmission event in the transmission queue having the highest priority.
[0053]
In addition, in view of the low possibility that multiple calls to the mail collection instruction due to the callback from the SM_SC occur, in step S35 of the incoming call process in FIG. 3, information on the transmission event of the callback to the SM_SC is transmitted. Instead of being put in the queue 212, the data is stored in a specific storage area different from the storage area of the transmission queue 212 on the DRAM 104. Further, in the transmission processing of FIG. If the transmission event information of the SM_SC is held, the transmission to the SM_SC may be preferentially performed based on the transmission event information stored in the specific storage area, regardless of the transmission queue 212. In this case, the purpose can be achieved more easily than operating the transmission queue.
[0054]
【The invention's effect】
As is apparent from the above description, according to the present invention, there is provided a communication terminal device for performing e-mail communication and other predetermined data communication via a communication network, wherein a call from a center for performing an e-mail communication service is provided. In response to a call accompanied by notification of an e-mail collection instruction due to back-up, in a communication terminal device which automatically calls back to the center and receives e-mail, there is a call accompanied by notification of an e-mail collection instruction by a callback from the center. When the outgoing event to other than the center is in the standby state, the priority is given to the transmission of the callback to the center. Callbacks can be made in a short period of time, avoiding callback timeouts as much as possible, and It can be carried out reliably. Further, the center has an excellent effect that the number of times of retrying the notification of the collection instruction is reduced, and the cost required for the retry can be suppressed.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a communication terminal device according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing a configuration of tasks related to facsimile image communication and electronic mail communication and a data flow in the communication terminal device.
FIG. 3 is a flowchart illustrating a control procedure of an incoming call process in the communication terminal device.
FIG. 4 is a flowchart showing a control procedure of a transmission process in the communication terminal device.
FIG. 5 is an explanatory diagram showing a configuration of caller telephone number information notified from a SM_SC to a communication terminal device.
FIG. 6 is an explanatory diagram showing an example of the contents of a transmission queue and a state in which information on a transmission event to the SM_SC is inserted at the head thereof.
[Explanation of symbols]
100 Communication terminal device
101 CPU
102 ROM
103 Flash RAM
104 DRAM
105 Display
106 reading unit
107 Recorder
108 Operation unit
109 Communication unit
110 PSTN / ISDN
120 Center (SM_SC)
130 Internet
204 Line control task
212 Outgoing Queue

Claims (12)

A communication terminal device that performs e-mail communication and other predetermined data communication via a communication network, and in response to a call accompanied by notification of an e-mail collection instruction by a callback from a center that performs an e-mail communication service, In a communication terminal device that automatically calls back to the center and receives an e-mail, when a call accompanied by notification of an e-mail collection instruction by the callback is issued from the center, an outgoing event to other than the center is in a standby state. A communication terminal device having control means for controlling transmission of a callback to the center with priority. Having storage means for storing a matrix of information of transmission events in a standby state,
The control means, when there is a call accompanied by notification of an e-mail collection instruction by the callback from the center, generates information on the transmission event of the callback to the center, inserts it at the head of the matrix, and thereafter The communication terminal device according to claim 1, wherein in the transmission process, control is performed such that transmission is performed from a transmission event at the head of the matrix. It has a storage means for storing a plurality of queues, each of which is a matrix of information of transmission events in a standby state and has different priorities,
The control means, when a call accompanied by notification of an e-mail collection instruction by a callback is issued from the center, generates information on an event of sending a callback to the center, and generates the highest priority among the plurality of queues. 2. The communication terminal device according to claim 1, wherein the communication terminal device is placed in a high-priority queue, and in a subsequent transmission process, control is performed such that transmission is performed from the first transmission event of the highest-priority queue. First storage means for storing a matrix of information of transmission events to other than the center in a standby state;
A second storage unit for storing information on an outgoing event to the center,
The control means, when there is a call accompanied by notification of an e-mail collection instruction by a callback from the center, generates information on a call transmission event to the center and stores the information in the second storage means, 2. A control method according to claim 1, wherein, in subsequent transmission processing, if information on a transmission event of the callback to the center is stored in the second storage means, the transmission of the transmission event is controlled. A communication terminal device according to claim 1. A communication terminal device that performs e-mail communication and other predetermined data communication via a communication network, and in response to a call accompanied by notification of an e-mail collection instruction by a callback from a center that performs an e-mail communication service, In the communication control method of the communication terminal device for automatically calling back to the center and receiving an e-mail,
When there is a call accompanied by notification of an e-mail collection instruction by the callback from the center, if a transmission event to a center other than the center is in a standby state, transmission of the callback to the center is preferentially performed. A communication control method characterized by controlling. Using storage means for storing a matrix of information of transmission events in a standby state,
When there is a call accompanied by notification of an e-mail collection instruction by the callback from the center, information on the transmission event of the callback to the center is generated and inserted at the head of the queue, and in the subsequent transmission processing, 6. The communication control method according to claim 5, wherein control is performed such that transmission is performed from a transmission event at the head of the queue. Using a storage means for storing a plurality of queues of information of transmission events in the standby state, each having a different priority,
When there is a call from the center accompanied by a notification of an e-mail collection instruction by a callback, information on a call transmission event to the center is generated and put into the highest priority queue among the plurality of queues. 6. The communication control method according to claim 5, wherein in the subsequent transmission processing, control is performed such that transmission is performed from a head transmission event of the highest priority queue. First storage means for storing a matrix of information of transmission events to other than the center in a standby state;
Using a second storage means for storing information of the transmission event to the center,
When there is a call accompanied by notification of an e-mail collection instruction by a callback from the center, information of a callback transmission event to the center is generated and stored in the second storage means. 6. The communication control according to claim 5, wherein if the information on the transmission event of the callback to the center is stored in the second storage means, the transmission is controlled to be performed. Method. A communication terminal device that performs e-mail communication and other predetermined data communication via a communication network, and in response to a call accompanied by notification of an e-mail collection instruction by a callback from a center that performs an e-mail communication service, In the communication control program of the communication terminal device that automatically calls back to the center and receives an e-mail,
When there is a call accompanied by notification of an e-mail collection instruction by the callback from the center, if a transmission event to a center other than the center is in a standby state, transmission of the callback to the center is preferentially performed. A communication control program comprising a control procedure for controlling. Using storage means for storing a matrix of information of transmission events in a standby state,
When there is a call accompanied by notification of an e-mail collection instruction by the callback from the center, information on the transmission event of the callback to the center is generated and inserted at the head of the queue, and in the subsequent transmission processing, 10. The communication control program according to claim 9, further comprising a control procedure for controlling transmission from a transmission event at the head of a queue. Using a storage means for storing a plurality of queues of information of transmission events in the standby state, each having a different priority,
When there is a call from the center accompanied by a notification of an e-mail collection instruction by a callback, information on a call transmission event to the center is generated and put into the highest priority queue among the plurality of queues. 10. The communication control program according to claim 9, further comprising, in a subsequent transmission process, a control procedure for performing control so that transmission is performed from a top transmission event of the highest priority queue. First storage means for storing a matrix of information of transmission events to other than the center in a standby state;
Using a second storage means for storing information of the transmission event to the center,
When there is a call accompanied by notification of an e-mail collection instruction by a callback from the center, information of a callback transmission event to the center is generated and stored in the second storage means. 10. The method according to claim 9, further comprising the step of: controlling the transmission of the transmission event to the center if the information on the transmission event of the callback to the center is stored in the second storage means. Communication control program as described.

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