JP2589085B2 - Control information transmission method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a control information transmission method for a communication device system.

[Related Art] As a conventional control information transmission method, there is a control information transmission method between a main device of a key telephone and a key telephone.

FIG. 11 shows an example of control information between the main unit of the key telephone and the key telephone based on the above method.

In this example, the number of key telephones is six,
In this system, data is sent from the main device to the telephone after the synchronization 1, and data is transmitted from the telephone to the main device after the synchronization 2. Further, there is a method in which data is transmitted from the main device to one telephone, and then data is transmitted from the telephone to the main device, and this operation is repeated with telephones 2, 3,....

In the above-mentioned conventional example, the control information between the main device and the key telephone is information on a telephone system terminal, for example, a command (external line capture request, etc.) from the telephone, status information (off-hook information, etc.) from the telephone. ), A command from the main device (such as an incoming external call), and status information from the main device (such as an external busy).

[Problems to be Solved by the Invention] In the above-mentioned conventional apparatus, since information of a non-telephone system terminal is not transmitted, the main apparatus having a built-in communication function transmits information obtained by communication (telephone number of the other party). Information, user abbreviation information of the other party, etc.) cannot be displayed on the telephone.

Further, in the above-mentioned conventional apparatus, registration of information necessary for the communication function from the telephone (registration of own telephone number information, registration of user abbreviation information of own apparatus, registration of software switch, etc., output instruction of registered information) There is a problem that cannot be performed.

[Means for Solving the Problems] The present invention provides an image data communication unit that performs communication of image data, a plurality of communication terminals having a call function and a function of displaying information, and a plurality of communication terminals through a control signal line. And a control unit for controlling communication with a plurality of communication terminals via a control signal line and the image data communication unit, and selectively connecting the image data communication unit and the plurality of communication terminals to a communication line. In the communication system, information about the image data communication unit is transmitted from the control unit to the plurality of communication terminals, information necessary for image communication by the image data communication unit is transmitted from the plurality of communication terminals to the control unit, and the image data communication unit The control unit displays information obtained by the image communication or information on the state of the image data communication unit on a plurality of communication terminals, and the control unit displays information from the plurality of communication terminals on the image data. It is registered in the data communication unit.

[Operation] The present invention can register information of an image data communication unit from each communication terminal in a communication system that selectively connects an image data communication unit and a plurality of communication terminals to a communication line, Further, information on image data communication can be displayed on each communication terminal.

Embodiment FIG. 1 is a block diagram showing a line controller according to an embodiment of the present invention.

In the above embodiment, a communication device system in which the number of communication lines is one and three key telephones are connected to a line control device is considered. The line control device is a device having the functions of a main device of a conventional facsimile machine and a key telephone.

The line switching circuit 2 outputs signals 0, 1,
At 2 and 3, the telephone line 2a is connected to the facsimile function unit and the telephones KT1, KT2, and KT3, respectively.

The hybrid circuit 4 is a circuit that separates a transmission system signal and a reception system signal. The reading circuit 6 sequentially reads image signals for one line in the main operation direction from a transmission document, creates a signal sequence representing binary values of white and black, and uses an image pickup device such as a CCD (charge coupled device) and an optical system to carry out the process. It is composed. The encoding circuit 8 inputs the binarized data, and encodes (MH
This is a circuit for outputting (modified) encoded or MR (modified read) encoded data.

The modulator 10 is a circuit that performs modulation based on CCITT recommendation V27ter (operating phase modulation) or V29 (quadrature modulation). The modulator 12 is a circuit that performs modulation based on CCITT recommendation V21. The addition circuit 14 is a circuit that adds the output signals of the modulators 10 and 12. The demodulator 16 is a circuit that performs demodulation based on CCITT recommendation V21.

The demodulator 18 is a circuit that performs demodulation based on CCITT recommendation V27ter (operating phase modulation) or V29 (quadrature modulation). The decoding circuit 20 is a circuit that outputs decoded (MH (Modified Huffman) decoding or MR (Modified read) decoding) data. The recording circuit 22,
This is a circuit that receives the decoded data and sequentially records white and black signals line by line.

The incoming call detection circuit 24 is a circuit that generates a pulse when a call signal is detected. When the level of the signal from the control circuit 38 is “1”, the hold sound generation circuit 26
Is a circuit for sending a hold tone to the receiver.

The dial signal transmission circuit 28 is a circuit that inputs telephone number information from the control circuit 38 and transmits selection signals (DC impulse dial signal, push button dial signal) to the telephone line 2a. The power supply circuit 30 is a circuit for supplying power to the key telephone, and is, for example, a circuit for outputting 24 V to a control and power supply circuit.

The data transmission control circuit 32 is a circuit that controls data transmission between the key telephone and the line controller. When the signal level from the control circuit 38 is "0", data transmission (transmission from the line control device to the key telephone) is performed, and when the signal level is "1", data reception (line transmission from the key telephone). (Transmission to the control device). Further, the data transmission control circuit 32 includes the telephones KT1, KT2,
A signal (for example, a 50 KHz signal or a 35 KHz signal) which is FSK-modulated for KT3 is output. That is, the data transmission control circuit 32 has an FSK modulation / demodulation function.

The timing generation circuit 34 is a circuit that creates a bit timing clock and a reference information control clock for controlling the telephone based on the mode set signal from the control circuit 38. In the above embodiment, the clock of the bit timing is 1953.125 Hz (the cycle is 0.512 ms), and the reference clock of the control information for controlling the telephone is a clock having the cycle of 24.96 ms. S / P, P / S conversion circuit 36
Performs data transmission when the signal level from the control circuit 38 is "0", converts the byte data from the control circuit 38 from parallel to serial, and transmits data obtained by adding a start bit and a stop bit to the data. This is a circuit sent to the control circuit 32. The conversion circuit 36 is configured by a double buffer (a first buffer and a second buffer).

The first buffer is a buffer close to the control circuit 38,
The second buffer is a buffer close to the data transmission control circuit 32. At the time of data transmission, since the first buffer and the second buffer are empty, a clock for byte timing is sent to the control circuit 38. When byte data is input from the control circuit 38, the byte data is stored in the first buffer, and then the data in the first buffer is stored in the second buffer because the second buffer is also empty. Thereby, the first
Since the buffer becomes empty, the conversion circuit 36 outputs a clock for byte timing to the control circuit 38.

When byte data is input from the control circuit 38, the byte data is stored in the first buffer. The data in the second buffer is converted from parallel to serial, and data obtained by adding a start bit and a stop bit to the data is output to the data transmission control circuit 32. The data in the first buffer is transferred to the second buffer and The circuit 38 generates a clock for byte timing.

Conversion circuit 36 receives data when the control signal level from control circuit 38 is “1”. That is,
When data from the data transmission control circuit 32 is input, 8-bit data after detecting a start bit is input, and when a stop bit is detected, the 8-bit data is stored in the second buffer as parallel data. Since the first buffer is empty, the data in the second buffer is transferred to the first buffer. When the data of the first buffer is stored, it receives a byte timing clock from the control circuit 38. The conversion circuit 36 again inputs data from the data transmission control circuit 32 and detects the start bit.
When the stop data is detected and the stop bit is detected, the 8-bit data is converted into the parallel data in the second data.
Store in buffer. That is, the conversion circuit 36 removes the start bit and the stop bit of the serial data when receiving the data, performs serial-parallel conversion, and outputs the parallel data to the control circuit 38.

The control circuit 38 is a circuit for controlling the key telephone, controlling the information of the non-telephone system terminal, and controlling the communication operation included in the device. Examples of the control of the information of the non-telephone type terminal include a user abbreviation of the other party's communication device, control of displaying telephone number information on the telephone, control of registering information necessary for the communication device from the telephone to the communication device, and the like. is there.

FIG. 2 is a block diagram showing an example of the telephone KT1. The telephones KT2 and KT3 have the same configuration as the telephone KT1.

The line control circuit 40 is a circuit that switches a signal line from the line switching circuit 2 to a telephone network 42, a signal generation circuit 46, and a speaker circuit 48. In addition, a handset 44, a power supply circuit 50, a display unit 52, a keyboard 54, and a lamp 56 are provided.

The data transmission control circuit 58 is a circuit for controlling data transmission between the key telephone and the line controller. When the signal level from the control circuit 64 is "0", data transmission (line transmission from the key telephone to the line controller) is performed. Transmission to the control device). On the other hand, when the level of the signal from the control 64 is “1”,
Data reception (transmission from the line controller to the key telephone. The data transmission control circuit 58 has an FSK modulation / demodulation function, and outputs a 50 KHz signal and a 35 KHz signal (FSK modulated signal).

The timing generation circuit 60, based on the mode set signal from the control circuit 64,
This is a circuit for creating a reference clock for control information for controlling the telephone. Bit timing clock is 1953.125
Hz (the cycle is 0.512 ms), and the reference clock of the control signal for controlling the telephone is a clock having a cycle of 24.96 ms.

The conversion circuit 62 transmits data when the level of the signal from the control circuit 64 is “0”, inputs byte data, converts this byte data into parallel-serial data, and converts the byte data into a start bit and a stop bit. Is sent to the data transmission control circuit 58. Conversion circuit 62
Is composed of a double buffer (third buffer, fourth buffer). The third buffer is a buffer close to the control circuit 64, and the fourth buffer is a buffer close to the data transmission control circuit 58.

At the time of data transmission, since the third buffer and the fourth buffer are both empty, a clock for byte timing is output to the control circuit 64. When byte data is input from the control circuit 64, the byte data is stored in the third buffer. Thereafter, since the fourth buffer is also empty, the data in the third buffer is stored in the fourth buffer. At this time, since the third buffer becomes empty, the conversion circuit 62 outputs a clock for byte timing to the control circuit 64. Then, when byte data is input from the control circuit 64, the byte data is stored in the third buffer. When the data in the fourth buffer is converted into parallel-serial data and the data obtained by adding a start bit and a stop bit to the data transmission control circuit 58 is completed, the data in the third buffer is transferred to the fourth buffer, A clock for byte timing is sent to the data transmission control circuit 58.

Conversion circuit 62 receives data when the level of the signal from control circuit 64 is “1”. In other words, data from the data transmission control circuit 58 is input, 8-bit data after the start bit is detected, and when the stop bit is detected, the 8-bit data is stored in the fourth buffer as parallel data. I do. Since the third buffer is empty, the data in the fourth buffer is transferred to the third buffer. When the data of the third buffer is stored,
The data transmission control circuit 58 generates a byte timing clock. The conversion circuit 62 returns to the data transmission control circuit 58 again.
8 after inputting data and detecting the start bit
When bit data is input and a stop bit is detected, the 8-bit data is stored in the fourth buffer as parallel data. That is, when receiving the data, the conversion circuit 62 removes the start bit and the stop bit of the serial data, performs serial / parallel conversion, and sends the parallel data to the control circuit 64.

FIG. 3 is a diagram showing a format of a control signal in the above embodiment.

A sync signal in which all 8 bits are 0 and a 10-bit signal obtained by adding a start bit and a stop bit to the sync signal are transmitted (A). Note that the control information from the line controller to the key telephone and the control information from the key telephone to the line controller have a configuration in which all 8-bit data does not become 0.

Subsequently, the key telephones KT1 and KT are sent from the line controller.
2. Transmit the control information of the telephone system terminal to KT3 (a, b, c). In this case, each data length is composed of 24 bits, and a bit obtained by adding a start bit and a stop bit to this is 30 bits.

Subsequently, all key telephones KT are sent from the line controller.
Facsimile information is transmitted from 1 to KT3 (E). That is, the facsimile apparatus transmits information that is not in use, transmission mode information, reception mode information, user abbreviation information of the other party facsimile apparatus, and telephone number information of the other party facsimile apparatus as control information. This data length is composed of 48 bits (6 bytes), and the number of bits obtained by adding a start bit and a stop bit to this is 60 bits.

One of the six bytes is used as a command, and the upper four bits indicate facsimile status. The facsimile is not in use, transmission mode information, reception mode information, and user abbreviation information of the partner facsimile machine. Indicates which information of the telephone number information of the other party's facsimile apparatus is being used. Among these information, the user abbreviation of the other party and the telephone number information of the other party are composed of 16 bytes and 20 bytes, respectively.

On the other hand, the data field of the facsimile information is composed of 5 bytes, and the transmission of the information is completed by transmitting the 5-byte data four times together with the user abbreviation information and the telephone number information. That is, the transmission of the user abbreviation information or the telephone number information ends in five cycles of the control information. The transmission is completed by transmitting the 5-byte data four times, but the lower three bits of the command data are assigned to indicate the number of times of transmission of the 5-byte data.

Next, the control information of the telephone terminal is transmitted to the line controller sequentially from the key telephones KT1, KT2 and KT3 (f)
Ki, Ku). The data length is composed of 24 bits, and the number of bits including the start bit and the stop bit is composed of 30 bits. Subsequently, the control information is transmitted from the key telephone capable of transmitting data to the line control device (g). This control information is for registering data in the facsimile machine. The data length of the registration data is 48 bits (6 bytes), and the number of bits including the start bit and the stop bit is 60 bits.

One byte of the above six bytes is used as a command, and the upper four bits indicate which mode is set. By the combination of these bits, registration of own telephone number information, registration of user abbreviation information of own machine, registration of software switch, output of registered information, and the like are performed. In the command information, the telephone number information of the own device, the user abbreviation information of the own device, and the software switch information are respectively composed of 20 bytes, 16 bytes, and 2 bytes. The output of these registered information is only command information, not data.

On the other hand, the data field of the facsimile information is composed of 5 bytes, and the telephone number information and the user's abbreviation information are both transmitted by transmitting 5-byte data four times, thereby completing the transmission of the information. That is, the transmission of the user abbreviation information or the telephone number information ends in five cycles of the control information. The transmission is completed by transmitting the 5-byte data four times, but the lower 3 bits of the command information are assigned to indicate the number of times the 5-byte data is transmitted.
Also, the software switch information is 2 bytes, and the output instruction of the registered information has no other information.
It can be transmitted in cycles.

FIG. 4 is a diagram showing a specific bit arrangement of various control information described with reference to FIG.

FIG. 4 (1) is a diagram showing a control signal of a telephone terminal from the line control device to the key telephone. Fig. 4 (2)
FIG. 3 is a diagram showing a control signal of a telephone system terminal from a key telephone to a line controller. FIG. 4 (3) is a diagram showing facsimile information from the line control device to the key telephone. FIG. 4 (4) is a diagram showing facsimile information from the key telephone to the line controller. Here, the first byte data shown in FIG. 4 (1), the lower 3 bits data of the second byte, the first byte data of FIG. 4 (2), and the LSB data of the second byte are shown in FIG. Is a control signal of the telephone system terminal, and therefore, the description is omitted.

Next, information on running out of recording paper, activation from the key telephone to the facsimile apparatus, transmission of facsimile information from the line controller to the key telephone, and transmission of facsimile registration information from the key telephone to the line controller will be described. All control information is active low.

 FIG. 5 is a diagram showing information on running out of recording paper.

FIG. 5 shows that the recording paper has run out at the timing (A) and the recording paper has been set at the timing (A). For example, if the recording paper runs out completely,
Information indicating that the recording paper has run out is generated. by the way,
A black band may be attached to a predetermined remaining portion of the recording sheet, and when the black band is detected, it may be determined that the recording sheet has run out. Since the key telephone displays the above information, the operator can be notified that the recording paper has run out. Therefore, immediately before the recording paper runs out, the operator can know that fact.

FIG. 6 is a diagram showing an example in which a key telephone sets a line connection and transfers the line to a facsimile machine. That is, it is a diagram illustrating an example of activation of the facsimile machine.

KTm represents a key telephone, and LC represents a line controller. First, the key phone is using an outside line,
The external line use request is at L level (active). Thereafter, when the key telephone receives a start request of the facsimile apparatus from the operation part, the facsimile start request is set to L level (active). Then, a signal (L) indicating that facsimile activation is possible from the line control device.
Upon detecting the level signal, the key telephone sets the facsimile activation request signal and the external line use request signal to H level (non-active).

The line controller issues a facsimile activation request (H level)
Is detected, the signal indicating the facsimile activation enabled state is set to H level, and when the external line use request signal is detected to be at H level, the external line usable signal is set to H level. As a result, the outside line is transferred to the facsimile control unit, and facsimile communication is started. If the line controller detects that the facsimile activation request signal is at the L level during copying, the copying is interrupted and facsimile communication is started.

FIG. 7 is a diagram showing an example of transmission of facsimile information from the line control device to the key telephone.

First, as an example of facsimile status output when facsimile communication is performed, a state in which the facsimile apparatus is not in use, a transmission mode or a reception mode (when facsimile communication is started), a user abbreviation, and a telephone number are displayed alternately. (When NSX, CSI, TSI, CIG is received), and when the facsimile apparatus is not in use (when facsimile communication is completed). When NSX cannot be received, G2 and G3 are displayed.

FIG. 7 (1) is a diagram showing information transmitted from the line control device to the key telephone when facsimile communication is performed.

First, the current status is notified to the key telephone using the facsimile statuses 1 to 4. The above example shows the transmission mode, in which the user abbreviation of the other party's facsimile apparatus and the telephone number information of the other party's facsimile apparatus are alternately displayed. When the transmission mode is output, the frame number is fixed to 1.

FIG. 7 (2) shows the facsimile status 1, 2,
The combination of 3 and 4 indicates that the facsimile apparatus is not in use and informs the key telephone of the transmission mode, reception mode, user abbreviation, and telephone number.

Next, a facsimile state notification method will be described.

First, a method of notifying that the facsimile apparatus is not in use will be described.

The line controller sets the facsimile status number to 0 as facsimile information to be sent to the key telephone. Here, the facsimile is fixed at the L level, and the frame number and data 1 to 5 are don't care.

 Next, a communication method in the transmission mode will be described.

The line controller sets the facsimile status number to 1 as facsimile information to be sent to the key telephone. Here, the facsimile apparatus is fixed at the L level, and the frame number and data 1 to 5 are don't care.

 Next, a communication method in the reception mode will be described.

The line controller sets the facsimile status number to 2 as facsimile information to be sent to the key telephone. Here, the facsimile machine is fixed at L level,
The frame number and data 1 to 5 are don't care.

Next, a communication method of the abbreviation of the destination user will be described. .

The line control device sets the facsimile status number to 3 as facsimile information to be transmitted to the key telephone, and fixes it at L level. Then, the frame number is set to 1, and 1 to 5 bytes of user abbreviation data are transmitted. In this way, when one cycle is added, one more frame number is set, and data of 6 to 10 bytes and 11 to 15 bytes of the user abbreviation is transmitted. Then, in the last cycle, the frame number is set to 4, and 16-byte user abbreviation data is stored in data 1 and transmitted. Data 2 to 5 are don't care.

Next, a description will be given of a method of connecting the telephone numbers of the communication partners.

The line controller sets the facsimile status number to 4 as facsimile information to be transmitted to the key telephone, and fixes it at L level. Then, the frame number is set to 1, and data of 1 to 5 bytes of the telephone number is transmitted. In this way, each time the cycle is increased by one, the frame number is set to one more, and the data of the telephone number of 6 to 10 bytes, 11 to 15 bytes, and 16 to 20 bytes is transmitted.

FIG. 8 is a diagram showing an example of transmission of facsimile information when facsimile data is registered from a key telephone.

After confirming that the outside line is not in use, the key telephone KTm starts registration. That is, the registration request is activated. When the key telephone KTm outputs a registration request and detects that the registerable state signal from the line controller is at the L level, the key telephone KTm performs one registration and does not perform a plurality of registrations. Also, the key phone KT
m does not check whether or not an outside line is being used when one registration is started until the registration is completed. When one registration is completed (the key telephone KTm sends a registration request to the H level (non-active)).
), The registerable state signal is set to the H level and transmitted to the key telephone KTm.

At the same time, the line control device outputs registration error information, outside line busy information, and outside line incoming information to the key telephone KTm. If an error occurs during registration and the line controller sets the registration error information to L level (active), the line controller detects that a new registration request state signal is at H level, Is
The registration error information is set to H level.

In the example shown in FIG. 8, the number of the registered content is 1, and this is an example of registering a telephone number.

In the first cycle, the key telephone sets the frame number to 1, and transmits 1 to 5 bytes of data of the telephone number. The key telephone sets the frame numbers to 2, 3, and 4 at the second, third, and fourth cycles, respectively, and sets the telephone number to 6 to 10 bytes, 11 to 15 bytes, and 16 to 20 bytes.
Send out each byte of data.

Further, in the above example, it is assumed that, when one registration operation is being performed, an external line transmission request is received from another key telephone KTl.

After one registration operation is completed for the key telephone KTl, the line controller outputs an L level (active) signal as outside line usable state information. In this case, an L-level signal is output to all the key telephones as an outside line busy state signal.

Next, a case will be described where a user abbreviation is registered from the key telephone to the line controller.

First, the registration number is set to 2. Then, in the first cycle, the key telephone sets the frame number to 1, and transmits 1 to 5 bytes of user abbreviation data. In this way, the key telephone sets the frame number to 2 and 3 in the second and third cycles, and sends the user abbreviations of 6 to 10 bytes and 11 to 15 bytes of data. Then, in the fourth cycle, the key telephone sets the frame number to 4, stores 16-byte data of the user abbreviation in data 1 and sends it out. Note that data 2
No. 5 is don't care.

Next, registration of a software switch from the key telephone to the line controller will be described.

First, the registration number is set to 3. Then, the frame number is set to 1, the information of the software switch is stored in the data 1 and 2 and transmitted. Data 3 to 5 are don't cares.

Next, output of information registered in the line control device from the key telephone will be described. The registration number is set to 4, and data 1 to 5 are don't care.

FIG. 5 is a flowchart showing a control operation of the control circuit 38 shown in FIG.

Here, control of a telephone system terminal and control of a facsimile apparatus, control of displaying information obtained by facsimile communication on a key telephone, control of registering facsimile information from the key telephone, and the like are performed.

First, it is determined whether or not the key telephone has been operated (S7).
2) When the operation of the key telephone is performed, the key telephone is controlled (S74). That is, the control of the telephone system terminal is performed. If control of the facsimile machine is required (S76), specifically, registration of facsimile information from the key telephone, activation of the facsimile machine from the key telephone, etc., control of the facsimile machine is required. Is performed (S78).

If the facsimile operation is selected without the need for the key telephone operation in S72 (S80), control of the facsimile machine is performed (S82). If control of the key telephone is required (S84), control of the key telephone is performed. (S86). In the above case, the control of the facsimile apparatus refers to the control of facsimile communication. Also, the information (telephone number information of the other party, user abbreviation information of the other party) and the like obtained by facsimile communication in S84 are displayed on the key telephone.

FIG. 10 is a flowchart showing the control operation of the control circuit 64 in FIG.

In FIG. 10, control of a telephone system terminal, control of displaying information obtained by facsimile communication on a key telephone, control of registration of facsimile information from the key telephone, and the like are performed.

First, if there is a key telephone operation (S92), control of the key telephone is performed (S94), and if control of the facsimile machine is required (S96), data transmission (registration, etc.) to the line controller is performed (registered). S98). In S96, control of the facsimile apparatus includes registration of facsimile information from the key telephone, activation of the facsimile apparatus from the key telephone, and the like. In S98, data such as activation of the facsimile machine from the key telephone is transmitted to the line controller.

If facsimile communication information is received (S10
0), facsimile communication information is displayed on the telephone (S10
2).

Therefore, according to the above embodiment, in addition to the information of the telephone-based terminal, the information of the non-telephone-based terminal is used as the control information between the telephone and the line controller that controls the plurality of telephones having the built-in communication function. It is possible. That is, a line control device that controls a plurality of telephones having a built-in communication function can display information obtained by communication on the telephone. It is also possible to register information necessary for the communication function from the telephone.

In the above embodiment, as the control method, control information (each telephone terminal information to the key telephones KT1, KT2, KT3, facsimile information to all the key telephones) is transmitted from the line control device to the key telephone following the synchronization signal. Transmit.
Thereafter, control information (telephone terminal information of the key telephones KT1, KT2, and KT3, facsimile information from the key telephone capable of registering facsimile information) is transmitted from the key telephone to the line controller.

However, the order of transmission of the control information may be arbitrary. For example, following the synchronization signal, the key telephone KT
The telephone terminal information is transmitted to 1 and the telephone terminal information is transmitted from the key telephone KT1 to the line controller. Next, the telephone terminal information is transmitted from the line control information to the key telephone KT2, and the telephone terminal information is transmitted from the telephone KT2 to the line controller. Then, from the line controller to the key telephone
Transmits the phone terminal information to KT3, and the key phone KT3
From the terminal to the line controller. Next, information obtained by facsimile communication is transmitted from the line controller to all telephones, and facsimile information is transmitted from the key telephone capable of registering facsimile information to the line controller. In this manner, control may be performed between the line control device and the key telephone.

In the above embodiment, the information sent from the line control device to the key telephone includes information that does not use a facsimile, information that is in the transmission mode, information that is in the reception mode, information that displays the telephone number of the other party, And the like while displaying the user abbreviation on the side, but need not be limited to this. For example, error information and the like may be transmitted and the classification of the error and the like may be displayed. Further, in addition to displaying the facsimile information on the key telephone, the operator may be notified by sound using a speaker or the like. That is, the key phone operator may notify the key operator not only of the visual display but also of an audible display.

In addition, the information of the non-telephone system terminal between the telephone and a line control device that controls a plurality of telephones having a built-in communication function may be divided and transmitted according to the type of information,
By dividing the information of the non-telephone system terminal, it is possible to shorten one cycle of the control information.

According to the present invention, in a communication system for selectively connecting an image data communication unit and a plurality of communication terminals to a communication line, information of the image data communication unit can be registered from each communication terminal. This makes it possible to display information on image data communication on each communication terminal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a line control device according to one embodiment of the present invention. FIG. 2 is a block diagram showing an example of the key telephone in the above embodiment. FIG. 3 is a diagram showing a format of control information according to the above embodiment. FIGS. 4 (1), (2), (3), and (4) are diagrams showing specific bit arrangements of various types of information described with reference to FIG. FIG. 5 is a diagram showing information on running out of recording paper in the above embodiment. FIG. 6 is a diagram showing an example of activation of the facsimile apparatus from the key telephone in the above embodiment. FIGS. 7 (1) and 7 (2) are diagrams showing examples of transmission of facsimile information from the line control device to the key telephone in the above embodiment. FIGS. 8 (1) and 8 (2) are diagrams showing an example of transmission of facsimile information such as registration of facsimile data from the key telephone in the above embodiment. FIG. 9 is a flowchart showing the control of the control circuit shown in FIG. FIG. 10 is a diagram showing a control operation of the control circuit shown in FIG. FIG. 11 is a diagram showing an example of conventional control information. 2 ... Line switching circuit, 20 ... Decoding circuit, 22 ... Recording circuit, 24 ... Reception detecting circuit, 38, 64 ... Control circuit, 40 ... Line control circuit, KT1, KT2, KT3 ... Phone .

Claims (2)

(57) [Claims] An image data communication section for communicating image data, a plurality of communication terminals having a call function and an information display function, and a plurality of communication terminals connected to the plurality of communication terminals by control signal lines. A communication unit for communicating with the plurality of communication terminals and controlling the image data communication unit via the communication unit, and selectively connecting the image data communication unit and the plurality of communication terminals to a communication line. In the control information transmission method between the plurality of communication terminals and the control unit, transmitting information on the image data communication unit from the control unit to the plurality of communication terminals; and from the plurality of communication terminals to the control unit. Transmitting information required for image communication by the image data communication unit; and information obtained by image communication by the image data communication unit or the image data communication. The control unit displaying information on the state of the unit on the plurality of communication terminals; and the control unit registering the information from the plurality of communication terminals in the image data communication unit. A control information transmission method, characterized in that: 2. The information processing apparatus according to claim 1, wherein the information relating to the image data communication is divided and transmitted between the control unit and the plurality of communication terminals according to the type of the information. Control information transmission method.