JPH02155354A - Communication method for facsimile equipment - Google Patents

Abstract

PURPOSE:To attain communication between a transmitter and a receiver manufactured with different manufactures by adopting a dial signal having a predetermined frequency for a password. CONSTITUTION:An operates a pushbutton in a transmitter 1 to enter a 4-digit number decided as a password. Thus, a password detection section 10 of a receiver 2 detects whether or not a received dial signal is a set password. When the 4-digit received DTMF signal is coincident with the password, the receiver 2 returned a 2nd replay message to the transmitter 1. Thus, since the dial signal is used as the password, even if the transmitter and the receiver are manufactured by different manufactures, closed area communication using the password is attained.

Description

[Detailed Description of the Invention] The present invention is a communication method for a facsimile device in which a password is transmitted from the transmitter side and communication is enabled only when the password matches the password recorded on the receiver side. Regarding.

Conventionally, telephone lines used for facsimile machines can be connected to an unspecified number of destinations. Therefore, even if image information is sent from an unnecessary transmitter, the receiver in automatic reception mode will receive it and record it, resulting in a waste of recording paper. be.

Therefore, in order to solve such problems, closed communication methods are being considered that allow transmission only with specific parties. Here, the closed communication method refers to a method in which a password is transmitted at the initial stage of communication, that is, at the time of handshake, and transmission is performed only when the password matches the password on the receiver side.

By the way, in conventional closed communication methods, character codes have been used as passwords.

' If a character code is used as a password, the password transmission format, that is, the frame structure of the signal, differs for each manufacturer, so closed communication methods can only be used between transmitters and receivers of the same manufacturer. cannot be used. Also,
Naturally, both the transmitter and the receiver must have a password-based closed communication function.

An object of the present invention is to solve the above-mentioned technical problems, and to enable communication between transmitters and receivers of different manufacturers, and regardless of the model of the transmitter, using a closed communication method. An object of the present invention is to provide a communication method for a facsimile device.

The present invention provides a communication method for a facsimile device in which a password is transmitted from a transmitter side and communication is enabled only when the password matches the password recorded on the receiver side. The password is a dial signal having a predetermined frequency.

According to the above configuration, since a dial signal is used as a password, communication can be performed between transmitters and receivers made by different manufacturers. Further, according to the present invention, only the receiver side needs to have a function of processing a dial signal as a password, so that the transmitter side can communicate with any model.

FIG. 1 is a diagram of a communication system using the communication method according to the present invention. A transmitter-side facsimile device (hereinafter abbreviated as a transmitter) 1 and a receiver-side facsimile device (hereinafter abbreviated as a receiver) 2 are connected via a telephone line β1. Note that the transmitter 1 has the functions of a normal facsimile machine.
In addition to the functions of a normal facsimile machine, the receiver 2 has a function capable of implementing the communication method according to the present invention. In the figure, 3 is the CPU, 4 is the DTMF (Dual Tone Frequency)
y) Operation section including dial number entry keys and function keys that emit signals; 5 is ROM in which system programs are stored; 6 is RAM in which response messages are stored; 7 is CCD (Charge);
8 is a recording section including a thermal head, and 9 is a password storage section for storing a password.

Specifically, as shown in FIG. 2, the password storage unit 9 stores four-digit push button/dial signals as a password, such as each low group frequency of "5", "3", "0", and "1". And high group frequencies are stored.

Note that the password storage section 9 may be a semiconductor memory such as a RAM or ROM, or may be a magnetic disk.

Further, in the figure, 10 is a password detection unit, which receives the DTMF data sent from the other party during handshake, as described later.
It serves to detect whether the signal matches the dial signal stored in the password storage section 9.

11 is a modem, 12 is a network control device that performs line control, 13 is a response message output unit that reads a response message from the RAM 6, converts it into audio, and outputs it to the other party, and 14 is an auto-dial device.

FIG. 3 is a sequence diagram of signals between the transmitter 1 and the receiver side 2. The communication method according to the present invention will be explained with reference to FIG. First, before transmitting an image signal, handshake is performed between the transmitter 1 and the receiver a2. That is, when the transmitter 1 makes a call (dialing), the receiver 2 returns a first response message to the transmitter 1. Specifically, from RAM6, "Please enter your password" is sent.
The response message is read out and given to the response message output section 13. As a result, the response message output section 13
converts this response message into voice and outputs it to the transmitter 1. As a result, the transmitter 1 outputs the voice message "Please enter your password" from the speaker of the receiver.

Next, on the transmitter 1, the operator presses a push button and enters a 4-digit number, for example "5", which is determined as a password.
, "3", "0", and "1" manually. Thereby, the password detection unit 10 of the receiver 2 detects whether the received dial signal is the set password. Specifically, the password detection unit 10 receives the received D T
The frequency of the MF signal is discriminated to determine the low group frequency and the high group frequency.

On the other hand, the CPU 3 uses the address "1" of the password storage section 9.
is specified, the low group frequency and the high group frequency are read out and given to the password detection unit 10. Thereby, the password detection unit 10 compares the low group frequency and high group frequency of the received first DTMF signal with the low group frequency and high group frequency registered as a password. When they match, the same processing as described above for the first DTMF signal is performed on the second DTMF signal received next.

Thereafter, when the received four-digit DTMF signal matches the password by similar processing, the receiver 2 returns a second response message to the transmitter 1. Specifically, the response message "Password OK. Please fax" is read out from the RAM 6 and provided to the response message output section 13. Thereby, the response message section 13 converts the response message into voice and outputs it to the transmitter 1. As a result, the transmitter 1 outputs a voice saying "Password is OK. Please fax me" from the speaker of the receiver.

In addition, if the received DTMF signal does not match the password according to the detection process of the password detection unit 10, or if the 4-digit DTMF signal is not detected within a certain period of time, the receiver 2 returns the disconnection command signal DCN. Disconnect the line.

In this way, since a dial signal is used as a password, closed communication using a password can be achieved even if the transmitter and receiver are manufactured by different manufacturers, or regardless of the model of the transmitter. It becomes possible to do so.

Note that after the password detection process, a normal handshake process is executed. That is, the receiver 2 receives the non-standard function identification signal NSF (Non-3 standard facility identification signal NSF).
calls), called terminal identification signal C3I (Calle
d 5ubscriberIdenLificati
on), digital identification signal DIS (Digital
Identification Signal)
to be sent back.

When the transmitter receives such an NSF signal, C3I signal, or Dis signal, a non-standard function setting signal NSS (Non-
3standard facilities 5et
-up), transmitting terminal identification signal TS1 (Transm
i t t ing 5ubscr 1b
cr Identification), digital command signal DC3 (Digital Command
Signal) are transmitted sequentially. Furthermore, following these, the transmitter side sends a training check signal TCP (Training Check) for training.
) is sent. When the receiving side receives the TCF signal, it checks the transmission speed of the modem, and if the transmission speed does not need to be adjusted, it sends a reception readiness confirmation signal CFR (Con
irmation to Receive). In this way, a handshake is performed between the transmitter 1 and the receiver 2. When the transmitter 1 receives the CFR signal, it transmits an image signal for one page following toning, and after the transmission of the image signal is finished, it sends a multi-page signal indicating the end of the image signal for one page. MPS (Multipage
Send a Signal). When the receiver 2 receives the MPS signal, it sends a message confirmation signal MCF (Message C) indicating that the message has been completely received.
information). When the transmitter 1 receives this MCF signal, it transmits a training signal again, and following this training signal, an image signal for one page, and then an MPS signal. Thereafter, the same operation is repeated for only the predetermined transmission document bones.

After transmitting the image signal for the final page, the procedure interrupt signal EOP is sent.
(End of Procedure) is transmitted, and when the receiver 2 returns an MCF signal in response, a DCN signal is transmitted to the receiver 2 and the line is disconnected.

In the above-mentioned embodiment, the transmitter was manually operated and the receiver was automatically received, but the present invention can also be used when communicating with the transmitter automatically operated and the receiver automatically received. It can be implemented. In this case, the receiver may be configured to output a password request signal instead of the password input response message, and the transmitter may be configured to respond to this by auto-dialing the password DTM F signal. good.

4. Furthermore, a pulse dial signal may be used as the password instead of the DTMF signal.

Further, instead of the password detection unit 10, the password detection process may be performed by a CPU and a modem. Furthermore, instead of the response message output section 13, the CP
The U and modem may be configured to perform response message output processing.

As described above, according to the present invention, a dial signal is used as a password, so even if a transmitter and a receiver are made by different manufacturers, no matter what model the transmitter is, It is also possible to communicate using a closed communication method. Therefore, unnecessary transmission of image signals from the other party can be blocked, and wasteful use of recording paper can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a diagram of a communication system using the communication method according to the present invention, FIG. 2 is a diagram showing a state in which dial signals are stored in the password storage unit 9, and FIG. 3 is a diagram of signals between a transmitter and a receiver. FIG. 1... Transmitter, 2... Receiver, 3... CPU, 9
. . . password storage unit, 10 . . . password detection unit, 13 . . . response message output unit.

Claims (1)

[Claims] (1) In a facsimile communication method in which a password is transmitted from the transmitter side and communications are enabled only when the password matches the password recorded on the receiver side, the password is a dial signal having a predetermined frequency. A communication method for a facsimile device, characterized in that: