JP2002252721A - Communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To build up a data communication system at a low cost especially without using an exclusive facility, that can easily be extended or relocated by general intelligence and cope easily with a scale from a small scale to a large scale. SOLUTION: A phone terminal 10 provided with a communication function and a display function of image information transmits a request command to request the image information to a computer (information management unit) 16 managing storage of the image information, lays out a picture and displays it in response to the image information sent from the information management unit 16, a user optionally selects information included in the displayed picture according to the operation, transmits a selection command to the information management unit 16 and the system lays out a new picture depending on the image information sent from the information management unit 16 depending on the selection command and displays the picture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a communication system capable of performing data communication using a telephone terminal device.

[0002]

2. Description of the Related Art A conventional data communication system is IEEE.
802. There is a fixed connection data communication system linked with a host computer, such as a LAN or Ethernet (registered trademark) system conforming to “”.

[0003] It comprises a dedicated cable, a dedicated connection device, and a high-performance data display terminal, and constitutes a large-scale data communication system.

[0004]

However, in the above-mentioned conventional data communication system, a fixed connection is provided between the host computer and the data display terminal, and once installed, it is difficult to change, for example, expansion or relocation. Connection required special expertise, and there were operational problems.

In addition, the construction of a conventional data communication system requires expensive dedicated equipment, which results in an expensive system and a large-scale operation. Therefore, it takes time to start, operate, and maintain the system. There was also a problem that it was not suitable for small-scale operation because of the cost.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art described above, and it is possible to easily expand or relocate the system by general knowledge, and it is easy to deal with small to large scale. In particular, it is an object of the present invention to provide a communication system capable of constructing a data communication system at low cost without using dedicated equipment.

[0007]

According to the present invention, there is provided a communication system comprising a telephone network, a telephone terminal device belonging to the telephone network, and a computer device. Interface means for interfacing with a communication path connected to the telephone network;
Dial input means for inputting dial information; telephone connection request means for transmitting connection request information including dial information input from the dial input means to the telephone network; Voice communication means for transmitting / receiving a voice communication system signal to / from the other party's telephone terminal device via a telephone, display means for displaying image information including characters, and requesting the telephone network to connect to the computer device Data connection request means, data communication means connected to the interface means for transmitting and receiving data communication signals to and from the computer device via the communication path, and processing received by the data communication means from the computer device Image information generating means for generating processing selection image information in a menu format based on the selection information;
Display control means for outputting the processing selection image information generated by the image information generation means to the display means, wherein the computer device is connected to the telephone terminal device via the telephone network, The telephone terminal device further comprises selection information transmitting means for transmitting the processing selection information.

Accordingly, the present invention provides a telephone terminal device having a communication function and a display function of image information and not storing and managing image information by itself, a computer device (information management device) storing and managing image information, and the like. Using the communication function of the telephone terminal device, it is possible to make a system configuration that connects via a telephone communication line. Therefore, a data communication system can be constructed at low cost without using special equipment.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system configuration diagram of the present invention. In FIG. 1, a private branch exchange (hereinafter referred to as “PBX”) 12
Performs circuit switching. The PBX 12 is a data telephone terminal (hereinafter referred to as "IDT") which is a terminal device.
10 and a normal extension telephone 13 are accommodated, and a call exchange connection is made between them. In addition, PBX
12 is a terminal adapter (hereinafter referred to as “TA”) 14
A host computer (hereinafter, referred to as “HOST”) 16 as an information management device is connected to the
And HOST 16 are also freely connected.

The IDT 10 has a telephone function, a data communication function, and a display function for data communication. However, the IDT 10 itself does not manage data,
This is to enjoy the data managed by HOST16. Therefore, the HOST 16 performs data communication with the IDT 10, and provides various service functions in response to a request command from the IDT 10.

The communication paths between the IDT 10 and the PBX 12 and between the PBX 12 and the TA 14 are connected by a so-called 2B + D line interface 11, which is an ISDN basic interface.

A communication path between the TA 14 and the HOST 16 is connected to a serial interface 15 which is an RS-232C interface conforming to the EIA standard.

FIG. 2 is an external view of the IDT 10 of the present invention, wherein (a) is a front view, (b) is a left side view, (c) is a right side view, and (d) is a back view.

As shown in FIG. 2, the IDT 10 is
0, handset 201, line connection rosette 217
AC that supplies DC power from the AC100V to this device
The main body 20 is constituted by an adapter 216.
In 0, an extension paper 202, a speaker 203, an LCD display 204 as a display means, an LCD display contrast adjustment knob 218, and various push buttons are mounted.

FIG. 3 is a board diagram of the IDT 10. As shown in FIG. In FIG. 3, a free function button 205
Is a call start button at the time of data communication, and codes (F1 to F5) corresponding to the button pressed at the time of calling are included in the user setting information (UUI) of the call setting message as transmission data. Sent to. Also,
When the free function button 205 is pressed after connection to the data communication line, the HOST is connected via a communication path.
16 to receive various services.

The correction button 206 is used to correct the number input by the numeric keypad 207. The number displayed on the monitor in the area (b) of the LCD display 204 is erased one character at a time from the right end each time the button is pressed, and blank display is performed. It is to let.
When the numeric keypad 207 is pressed after connecting the data communication line, the numeric input is displayed on the LCD display 204 as a monitor, and the # button or the free function button 20 is displayed.
After pressing any one of the buttons F1 to F5 out of 5, the data is transmitted to the HOST 16 via the communication path to receive various services. On the other hand, the numeric keypad 207
When the handset 201 is off-hook or when the on-hook dial button 210 is pressed, it is used for dialing a telephone, and is used for dialing a telephone. After inputting the dial number, by pressing the dial / re-dial button 209, or after 6 seconds have elapsed. , Which is transmitted by a call setting message to establish a connection with a telephone line.

The call / re-dial button 209 is used as a re-dial function during standby or off-hook, in addition to the above-described call operation, for redialing the last called party. Things. The hold button 208 is used for temporarily holding during a call. The transfer button 211 is used to transfer a call during a call. Hooking button 212 is PBX during a call
12 is used when requesting transmission of a hooking pulse when the other party is an analog line.

The disconnect button 215 is used to forcibly disconnect the data communication line during data communication. The switch button 213 is used to switch to a circuit on the external terminal side by depressing a data communication line connected to the LCD display unit 204. The volume UP and volume DOWN buttons 214 adjust the level of the ring tone during standby or ringing while the handset 201 is off-hook, while the handset 201 adjusts the level of the reception sound and the on-hook dial button. While the monitor is being listened to by pressing 210, the speaker volume is used to adjust the speaker volume.

FIG. 4 is an internal block diagram showing the entire configuration of the IDT 10, and the line unit 4 is separated by a dashed line in FIG.
00A and a display section 400B.

In the line section 400A as a communication means, the line interface circuit 401 is a digital line interface having a so-called 2B + D channel, which is an ISDN basic interface, for performing call control with the PBX 12 and switching connection between B channels. .
The codec filter circuit 402 is connected to the line interface circuit 401, and encodes and decodes an audio signal and generates various tones. The communication circuit 403 adjusts the gain and frequency characteristics of the voice signal, and controls the switching of the input / output destination.

The data rate conversion circuit 404 is connected to the line interface circuit 401, and performs data format conversion and communication speed conversion between the B channel and the RS-232C during data communication. Peripheral circuit 40
Reference numeral 5 denotes a circuit for MPU bus conversion, an address decoder, and a watchdog timer. The power supply voltage detection circuit 407 sends out a reset signal when the power of this apparatus is turned on. The reset signal is also transmitted when a drop in the power supply voltage is detected and when the watchdog timer times out.

The key scan circuit 406 is a matrix circuit of operation buttons mounted on the panel of the apparatus, and detects a pressed operation button. MPU40
Reference numeral 8 denotes a microprocessor that controls the entire line unit 400A. Also, from the line section 400A to the display section 400B,
It also has a function of serially transferring necessary information such as a pressed key code, a communication attribute, and D channel information.

The ROM 409 is a storage circuit that stores programs and data of the MPU 408. RAM41
Reference numeral 0 denotes a rewritable storage circuit for storing data used for calculation and control in the MPU 408, and the storage content is volatilized when the power is turned off. The EEPROM 411 is a rewritable storage circuit for storing the contents registered and changed in the present apparatus, and the stored contents are not volatilized even when the power is turned off.

The power supply circuit 412 receives a DC supply from an external AC adapter and receives a DC voltage (+5 V, -5 V,-
21V).

In the display section 400B, the MPU421
Is a microprocessor that controls the entire display unit,
Further, it has a function of serially receiving necessary information such as a pressed key code, a communication attribute, and D channel information from the line section 400A. The communication data transmitting / receiving circuit 422 includes:
It transmits and receives serial communication data via the data rate conversion circuit 404 and the RS-232C interface, and converts it into parallel communication data. ROM 424 is
This is a storage circuit that stores programs and data of the MPU 421. The RAM 423 is a rewritable storage circuit for storing data used for calculation and control by the MPU 421, and is a storage circuit whose storage contents are volatilized when the power is turned off.

The address selection circuit (MPX) 425 is a buffer memory circuit (V
-RAM) 426, the storage address is MPU421
Or the LCD controller 429. The CG access circuit 427 is
According to the display character code output from the buffer memory circuit (V-RAM) 426, the character generator (C
G) Output a conversion code for accessing the 428, and based on the code, the character generator 428 outputs dot information necessary for LCD display.

The LCD controller 429 has a size of 320 × 2
This is a control circuit for displaying a screen on a 40-dot LCD display 430, and also for sending address timing to the MPX 425 and controlling LCD display timing.

FIG. 5 is a state transition diagram of the IDT 10 in the present embodiment. Referring to FIG.
The state becomes the WER ON state 501, the automatic calling of the data communication is continuously performed, and the state automatically changes to the data communication state 502. Also, in the data communication state 502, even when the disconnect button 215 is pressed, once the disconnect processing is performed, the POWER
An automatic call for data communication is performed in the same manner as the automatic call from the RON state 501, and the state transits to the data communication state 502 again. Further, in the data communication state 502, the HOST
When 16 generates ER OFF, the state transitions to the standby state 503.

In the standby state 503, when any one of the function buttons 205 (Fn, where n is 1 to 5) is depressed, a call for data communication is activated, and the state transits to the data communication state 502. . If there is an incoming call in the standby state 503, an automatic response is made and the state transits to the data communication state 502.

When the numeric keypad 207 and the function button 205 are pressed in the data communication state 502, information corresponding to the pressing operation is transmitted to the HO via a communication path.
Sent to ST16. Also, in the data communication state 502, when the handset 201 is off-hook or the on-hook dial button 210 is pressed, the state transits to the standby state 504, and the numeric keypad 207 becomes a dial button for calling a telephone function, and inputs a dial number to be called. Becomes possible. In this standby state 504, if there is a response from the other party, the state transitions to the data communication state 502 again, and the data communication state becomes available.

FIG. 6 shows a power-on sequence in the data communication system according to the present embodiment. In FIG. 6, first, when the power to the IDT 10 is turned on 600, the POW is turned on.
The state becomes the RON state, the IDT 10 is activated, and initialization is performed. The IDT 10 transmits, via the D channel, a call setup message (SETUP) 601 including an F0 code which is an automatic call to the user user information, that is, call information to the PBX 12, and a call setup acceptance message (CALL PROC) from the PBX 12. ) 602 is received.

On the other hand, the PBX 12 transmits a call setup message (SETUP) 603 to the TA 14. Then, the TA 14 receives the notification and sends the incoming call indication (CI) 604 to the HOST 16. TA14 is PBX1
2 transmits a paging message (ALERT) 605 to the IDT 10, and the PBX 12 transmits a paging message (ALERT) 606 to the IDT 10. Further, the TA14 receives the ER ON 607 from the HOST 16 and
2 transmits a response message (CONNECT) 608 to the IDT 10, and the PBX 12 transmits a response message (CONNECT) to the IDT 10.
(NECT) 609 is transmitted. Then, PBX12 is T
A14 has a response confirmation message (CONN ACK) 6
11 is transmitted. TA receiving CONN ACK611
Reference numeral 14 denotes a communication path (B channel) 6 to the HOST 16.
13 and sends DR612. The IDT 10 also checks the DR6 after the connection of the B channel 613 is confirmed.
10 to the IDT internal display output. Where IDT
B channel communication path 61 between 10 and HOST 16
3 is established.

The HOST 16 receiving the DR 612 waits for the timing (T0) 100 ms or more, and then the HOST 16
LCD as initial data from our service software
Transmitting the display data 614 through the B channel 613;
The IDT 10 that has received it displays it on the LCD display 204. The initial data is a main menu as a so-called initial screen. As mentioned above, IDT10
Does not manage the image information data by itself, so it is necessary to receive the data of the main menu from the HOST 16 as well. Further, the IDT 10 determines whether there is an error in the received data, and if there is no error or there is an error, the approval text (ACK) or the rejection text (NA
K) 615 is transmitted via the B channel 613.

HOST that has finished transmitting LCD display data
16 sends ER OFF 616 to TA 14,
14 is a disconnection message (DISC) 61 in the D channel.
7 to the PBX 12 and the PBX 12
0, a disconnection message (DISC) 618 is sent. I
The DT 10 sends a release message (RELEASE) 619 to the PBX 12, and the PBX 12 sends a release message (RELEASE) 620 to the TA 14 to make a release request.

PBX1 receiving RELEASE619
2 sends a release completion message (REL COM
P) 621 and TA 14 receiving RELEASE 620 transmits REL COMP 622 to PBX 12
To end the power-on sequence.

FIG. 7 shows an application service sequence in the data communication system according to the present embodiment. In FIG. 7, in the main menu displayed on the LCD display 204 of the IDT 10, a desired application service to be enjoyed (hereinafter referred to as “APS”) is selected, and the function button 2 corresponding to the APS is selected.
05 is pressed (700), Fn is included in the user information of the call setting message to receive the provision of the APS corresponding to the pressed button (Fn; n = 1 to 5). , PBX12. Thereafter, through the same procedure as 601 to 613 in the power-on sequence in FIG. 6, a communication path on the B channel is established. That is, the function button 205 functions as a selection unit for selecting a desired APS.

After the communication path is established, the display data 701 of the selected APS is transmitted to the IDT 10, and the display data is displayed on the LCD display 204 (702). I
DT10 sends a confirmation message (ACK) 703 to HOST
16 to be transmitted.

In response to the necessary key input 704, the key data 705 is displayed in the HOST1 for the displayed APS.
6 and the corresponding lower-level new AP
Makes a request for S display data, and the AP corresponding to the request
S display data 706 is received from HOST16,
The message is displayed (707) on the display 204, and a confirmation message (ACK) 708 is transmitted to the HOST16. This 70
By repeating steps 4 to 708, the intended service can be received.

When ending the service provision, when the function button Fn corresponding to the end is pressed (709), the key data information 710 of Fn is transmitted to the service software of the HOST 16 via the B channel, and the initial screen data 711 is based on the key data information. Is transmitted to the IDT 10. IDT10 sends confirmation message 712 to HOST16.
Send to Thereafter, the procedure of the cutting sequence 616 to 622, which is the same as the power-on sequence of FIG. 6, is performed.

After the disconnection, the initial screen data 711 contains the IDT
Then, the APS sequence is completed.

FIG. 8 shows a forced disconnection sequence in the data communication system of the present embodiment. In FIG. 8, when the forced disconnection is arbitrarily performed during the reception of the APS without a line error or no response, the disconnection key 215 is pressed (800), and a disconnection message (DISC) 801 is transmitted. The PBX 12 that receives it TA1
4 sends a disconnect message (DISC) 802 to
Release message to IDT10 (RELEASE)
804 and a release completion message (RELCOM)
P) 805 is received. The host computer 16 is ER
OFF806 is sent, and TA14 receives it and PBX
A release message (RELEASE) 807 is transmitted to the terminal 12 and a release completion message (REL COMP) 80
8 to complete the forced disconnection.

Further, I received REL COMP 805
The DT 10 takes a timing T1 (T1 is 500 ms or more), and sets a call setup message (SETUP) 80 for initial setting.
9 is transmitted, and after the same startup sequence as the power-on sequence, normal service provision and reception are possible.

FIG. 9 shows an error retransmission sequence in the data communication system according to the present embodiment. In FIG.
If there is an error in the LCD display data 901, 903, 905, a negative message (NAK) 9
02, 904, and 906 to the service software of the HOST 16 to request retransmission and error display. However, even if there is an error in the display data, IDT10
Is displayed on the LCD display 204 as it is.

FIGS. 10A and 10B show a definition area for code conversion of the IDT 10. FIG. In FIG. 10A, characters used in data communication with the HOST 16 are as follows.
The 1-byte character code is JIS8 unit code 1001, and the 2-byte character code is shift JIS code 10
02,1003. Since the definition regions of the two codes are different, even if they are mixed, the codes do not overlap, so that they can be distinguished.

To display the reception display code in characters, CG
First, the JIS 8 unit code 1001 and the shift JIS code 1002, 1003 are converted to the code corresponding to the ROM address.
After conversion to 1005, it is converted to a CGROM address input code 1006 shown in FIG.

FIG. 11 shows a code conversion flow by hardware. In FIG. 11, when display data is received from the HOST 16 (step S1), the first data shown in FIG.
The JIS 8 unit code 1001 or the shift JIS code 1002, 100
3 is determined (step S2). The JIS 8 unit code has a 1-byte structure, consisting of alphanumeric characters, half-width characters, A
It is composed of NK characters. The shift JIS code is
It has a 2-byte structure and is a full-width kanji code.

In step S2, in the case of the JIS 8 unit code 1001, the same code is repeated twice, and the received display data is converted into 2 bytes (step S3) and stored in the display buffer memory in the display order to be displayed on the LCD display (step S3). S4). Also, the shift JIS code 100
In the case of 2,1003, 2 bytes are stored in the display buffer memory as they are in the display order to be displayed on the LCD display.

Next, the display data stored in the display buffer memory is read out in the display order, input to a code conversion ROM (CCROM), converted into a CGROM address, and output (step S5). Next, CGRO
An address excluding the lower 4 bits is input to M, and a corresponding character dot conversion process is performed (step S).
6) Under the control of the LCD controller, characters of 16 dots per character are displayed on the LCD (step S7).

FIG. 12 shows a schematic flow of creating the code conversion ROM data of the IDT 10, and FIGS. 13 to 25 show the detailed flow of FIG.

In FIG. 12, first, if the data determined from the first byte of the received data transmitted from HOST 16 is a shift JIS 2 byte code (step S1).
1) According to the "SJIS.BAS" processing routine, JIS
Code conversion to 2-byte kanji (step S1)
2) The code is converted into ROM address data A by the "ROM.BAS" processing routine (step S13).
The first byte of the received data is determined as J
If the IS8 unit 1 byte code (step S14),
The code is converted into ROM address data B by the "1BYTE.BAS" processing routine (step S15). Next, ROM address data A and ROM address data B
Are combined into one and arranged as 16-bit ROM address data (step S16). Further, in order to write the data into the ROM, the data is aligned with the 16-bit code conversion data for the 16-bit address and output to be used as the ROM writer write data (step S17).

FIGS. 13 to 17 show "SJIS.BA".
S is a detailed flow of the processing routine, where "S" indicates a shift JIS code and "J" indicates a JIS code.The flow of FIG. 14 is step S21 of the flow of FIG.
The processing routine of FIG. 15 and FIG.
17 and FIG. 17 are the processing routines of steps S23 and S24 of FIG. 13 and FIG.
This is a processing routine of "ERO".

FIGS. 18 to 21 show "ROM. BAS".
It is a detailed flow of a processing routine, where R represents a CGROM address. FIGS. 19, 20 and 21 show the processing routine of steps S31, S32 and S33 in FIG.

FIGS. 22 to 25 show "1BYT".
E. FIG. 23, 24, and 25 are the processing routines of steps S41, S42, and S43 in FIG.

In the above flow, the received data is converted to the CGROM data by the ROM address data created for the code conversion.
(Excluding the lower 4 bits).

FIG. 26 differs from the code conversion flow shown in FIG. 11 in that the CCROM, that is, the software is used without using hardware. In FIG. 26, the processing from display data reception (step S51) to storage in the display buffer memory (step S54) is the same as the processing from step S1 to step S4 in FIG. 11, and a description thereof will be omitted.

Next, reading is performed from the display buffer memory in the display order, and the JIS 8 unit code or the shift JI
It is determined whether or not the code is an S code (step S55).
In the case of an 8-unit code, a process of converting it into a CGROM address (operation 1) is performed (step S56). On the other hand,
In the case of the shift JIS code, first, a process (operation 2) of converting to a JIS kanji code is performed (step S5).
7) Then, a process (operation 3) of converting the data into a CGROM address is performed (step S58).

Further, the result of the operation is used as an address input to the CGROM, and step S6 and step S6 in FIG.
7, a character dot conversion process (CGROM) corresponding to the address input is performed (step S59),
LCD character display is performed (step S60).

As described above, even in software, CCROM
Code conversion is possible with hardware using
In consideration of the amount of communication data and the communication speed, code conversion by hardware using a CCROM, which is superior to the code conversion speed, is adopted in this apparatus.

FIG. 27 shows L in the IDT 10 of this embodiment.
This is an example of a CD display, which is an APS related to a product design operation in a manufacturing factory or the like. In FIG. 27, the LCD has a kanji display of 20 digits and 13 lines, the top line is a monitor display of a telephone system and a data communication system, and the center 10 lines is a display of communication data. It shows the manufacturing specification and other design work menus. The lower two rows are areas for displaying the variable function key data sent corresponding to the function keys F1 to F5. In this display example, a menu selection key input or a function key F1 to F1
By pressing F5, the information is expanded to the next information, and necessary information is selected and obtained. In this display example, F1 to F5 are the previous page,
It has the functions of storing the next page, storing, printing and ending.

FIG. 28 shows a data format used in the present embodiment, which includes a start bit st (1 bit), data bits b1 to b8 (8 bits), a parity bit p (1 bit), and a stop bit sp (1 bit). Bit).

FIGS. 29 (a), (b) and (c) are text formats used in the present embodiment, where (a) is a general text, (b) is an ACK text, and (c) is a NAK text. 2 shows the configuration. General text is STX
A maximum of 250 bytes can be inserted between (Start of Text) and ETX (End of Text), and a BCC (Block Check Character
Code) operation value is also added. ACK text is STX
Insert an ACK transmission control character between
The C operation value is also added. NAK text is STX
A transmission control character of NAK, an error code (ER1, ER2), and a BCC operation value are also added between and ETX.

The maximum number of characters of one screen displayed on the IDT 10 by the received data is 11 lines × 40 digits = 440
It is a character and its data length is 440 bytes. However, as described above, since the text length of the general text in FIG. 29A is 250 bytes at the maximum, when the HOST 16 is a general personal computer, data to be displayed at one time except for the transmission control characters is not included. 250
Considered to be bytes. Further, about half of the screen data can be transferred as one text, and the upper half or the lower half of the screen, including the line feed code, can be rewritten.

The ACK text and the NAK text shown in FIGS. 29B and 29C are HOST1 for system operation.
6 is large, the IDT 10 checks the error of the received data against the BCC operation, and returns the resulting ACK text and NAK text to the host computer. Management and control are possible on the host computer side. Therefore, the IDT 10 does not manage transmission data,
It functions as a mere input / output device.

Further, a BCC operation value is added to enable more detailed error control of transmission data. In the BCC operation, the value from the text STX code to the ETX is obtained by exclusive OR (XOR) and set in the BCC code area.

FIG. 30 shows key information and transmission characters used in the present embodiment. In FIG. 30, (a) shows an operation key and transmission data corresponding to the operation. For example, F0H of the transmission key data is
This is a menu start request code when the IDT 10 is powered on. (B) shows transmission control characters and their contents. (C) shows a display control character and its contents.

A specific example of the use of this embodiment will be described below. (1) On the menu screen shown in FIG. 27 transmitted from the HOST 16 and displayed on the LCD, when, for example, a production specification of 102 is selected by key input, display data of necessary information relating to the production specification is displayed. Sent from Since such data communication between the HOST 16 and the IDT 10 uses one B channel of the ISDN, a call can be made with the customer using the other B channel. A meeting can be held with the customer regarding product specifications. Needless to say, it is also possible to perform a stock search and a meeting on management work by selecting with other key operations. (2) By operating a key of a telephone number of a partner who is going to make a call or a telephone number of a partner who is making a call, it is possible to display or search necessary information (for example, a profile of the partner) about the partner. Therefore, it is possible to provide a function of transmitting the calling and called numbers from the PBX 12 to the HOST 16 in advance, to display the outline of the other party on the LCD display before the call connection, and to consider the correspondence in advance according to the display. (3) Items can be ordered and delivered while viewing the screen by selecting a menu on the display screen. Further, even when the partner is out of the office, it is possible to pick up necessary information regarding the work and newly store it in the HOST 16.

That is, the user of this data communication system prepares a huge amount of materials at hand,
By calling up the necessary information from the data stored in the memory 6 and shared by a plurality of users, all the information on the product design can be used.

In the system configuration of the above embodiment, the host device to which the IDT 10 is connected is the PBX 12
However, the present invention is not limited to such a system configuration, and other system configurations may be used. Hereinafter, a system configuration of another embodiment will be described. (1) The upper level to which the IDT 10 is connected may be a network (ISDN). In this case, information stored in an information management device such as a database connected to the network can be called via the network. (2) The communication partner with the IDT 10 is not limited to the HOST 16, but may be a general personal computer or another device such as a printer as long as it has a data communication function. In this case, for example, local data can be read from a personal computer, and data from the HOST can be printed by a printer.

Further, the communication method of the IDT 10 is as follows.
Without being limited to the above embodiment, the following method is also possible. (1) Function keys F1 to F5 from IDT10
A method of identifying the call originating by the user in the user information (UUI) of the SETUP message. (2) A method of making a call with a dial number (special number) corresponding to F1 to F5 and identifying it. (3) A method in which received data is displayed not only for code transmission but also for input data in pixel information. (4) Asynchronous 9600 bps as in the above embodiment
A data communication method using a synchronous method or other transmission speeds instead of the above data communication. (5) A communication method using another format such as the HDLC procedure instead of the text format and the data format format according to the embodiment.

[0071]

According to the present invention, a telephone terminal device which has a communication function and a function of displaying image information including character information and does not store and manage the image information itself, and a computer device which stores and manages the image information ( The information management device can be connected to the information management device by using a communication function of the telephone terminal device by a telephone communication line. This has the effect that it is possible to add or relocate a possible terminal device).

Further, by changing the capacity of the exchange (PBX), it is possible to cope with a small to large communication system, and it is possible to freely construct a data communication system at a relatively low cost.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a data communication device for realizing a data communication method according to the present invention.

FIG. 2 is an external view of a terminal device (IDT) in FIG.

FIG. 3 is a board diagram of the IDT in FIG. 2;

FIG. 4 is a block diagram showing an overall configuration of an IDT.

FIG. 5 is a state transition diagram of an IDT.

FIG. 6 is a diagram of a power-on sequence in the data communication system shown in FIG.

FIG. 7 is a diagram of an application service sequence in the data communication system shown in FIG. 1;

FIG. 8 is a diagram of a forced disconnection sequence in the data communication system shown in FIG.

9 is a diagram of an error retransmission sequence in the data communication system shown in FIG.

FIG. 10 is a diagram showing a definition area for IDT code conversion.

FIG. 11 is a diagram showing a code conversion flow by hardware.

FIG. 12 is a diagram showing a schematic flow of creating code conversion ROM data.

FIG. 13 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

14 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG.

FIG. 15 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

FIG. 16 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

17 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

FIG. 18 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

19 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG.

20 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG.

FIG. 21 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

FIG. 22 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

FIG. 23 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

FIG. 24 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

FIG. 25 is a diagram showing a detailed flow of creating the code conversion ROM data of FIG. 12;

FIG. 26 is a diagram showing a code conversion flow by software.

FIG. 27 is a diagram showing an LCD display example in the IDT.

FIG. 28 is a diagram showing a data format format used in the data communication system shown in FIG.

FIG. 29 is a diagram of a text format used in the data communication system shown in FIG. 1;

30 is a diagram of key information and transmission characters used in the data communication system shown in FIG.

[Explanation of symbols]

 Reference Signs List 10 data telephone terminal 11 line interface 12 private branch exchange 13 extension telephone 14 terminal adapter 15 serial interface 16 information management device (host computer)

Continuation of the front page (72) Inventor Shinichi Yokota 94-Fujiba, Koriyama-shi, Fukushima Prefecture F-term in Nippon Telecom Technology Co., Ltd. (Reference) 5K023 CC01 EE02 GG06 HH01 5K027 FF22 5K101 LL03 MM02 MM07

Claims (3)

[Claims] 1. A communication system comprising: a telephone network; a telephone terminal device belonging to the telephone network; and a computer device. An interface for interfacing the telephone terminal device with a communication path connected to the telephone network. Means, dial input means for inputting dial information, telephone connection request means for sending connection request information including the dial information input from the dial input means to the telephone network, connected to the interface means, Voice communication means for transmitting and receiving voice communication signals to and from the other party's telephone terminal device via the communication path; display means for displaying image information including characters; and connection of the computer device to the telephone network And a data connection requesting means for requesting the communication with the computer device connected to the interface means via the communication path. A data communication unit for transmitting and receiving a data communication system signal, an image information generating unit for generating processing selection image information in a menu format based on the processing selection information received from the computer device by the data communication unit, and the image information generation Display control means for outputting the processing selection image information generated by the means to the display means, and when the computer terminal is connected to the telephone terminal device via the telephone network, the telephone terminal device for,
A communication system comprising a selection information transmitting means for transmitting the processing selection information. 2. The communication path has a plurality of communication channels, and the voice communication means communicates with the other party's telephone terminal device via a first communication channel among the plurality of communication channels. 2. A communication system according to claim 1, wherein said data communication means transmits and receives data communication signals to and from said computer via a second communication channel among said plurality of communication channels. 2. The communication system according to 1. 3. The computer according to claim 1, further comprising: selecting means for selecting an arbitrary processing from the processing selection image information displayed on the display means; and requesting information on the processing selected by the selecting means to the computer. 2. The communication system according to claim 1, further comprising processing request means for sending the request to an apparatus.