JPH03230663A - Picture communication equipment - Google Patents

Abstract

PURPOSE:To expand a selection object of a sender source depending on a password by collating a code of a DTMF signal detected from a public communication line connecting to an unspecified terminal equipment with a password registered in advance and controlling the propriety of reception of picture information from the line based on the result of collation. CONSTITUTION:This communication equipment consists of a public telephone line (communication line) L, an external telephone set 1, a line changeover circuit 2, an NCU (line control unit) 3, a MODEM 4, a picture information processing section 5, a recording section 6, a read section 7, an operation section 8, a nonvolatile memory section 9 registering the password, a control section 10, and a DTMF detection section 11. Then the DTMF signal is detected from the public telephone line (communication line) L connecting to an unspecified terminal equipment and the detected code in the DTMF signal is collated with the password registered in advance and the propriety of the reception of picture information is controlled from the line based on the result of collation. Thus, the selection object of the sender source by the password is expanded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention has a function of selectively receiving only image information from a predetermined specific transmitting station from a public communication line connected to an unspecified terminal. The present invention relates to an image communication device.

2. Description of the Related Art As shown in FIGS. 3 and 4, a conventional facsimile device of this type is standardized as a G3 machine based on the CCITT recommendation. A predetermined specific password is inserted into the TSI (transmitting terminal identification) signal or N5S (non-standard function setting) signal sent in the procedure, while the receiving side (RX) inserts the password into the above signal and sends it. The received password is compared with the password registered in advance on the receiving side, and if the two passwords match, a CFR (confirmation response) signal is issued as shown in Figure 3. The process moves on to the image information reception operation, but if there is a mismatch, reception of the image information is rejected by issuing a DCN (line disconnection command) signal and disconnecting the line, as shown in FIG. (For example, JP-A-62-2
No. 10779, Japanese Unexamined Patent Publication No. 169163/1983,
(See Japanese Patent Application Laid-Open No. 63-248260).

Problems to be Solved by the Invention However, with this configuration, there is a problem in that the models of the transmitting device are limited, and devices of other than a specific model cannot be selected by password.

The above problem arises for the following reasons.

First, even if the transmitting device is the same 03 machine, if it is a low-priced model that does not have the function to insert its own password into the TSI signal or NSS signal, then this transmitting device cannot be selected by the password described above.

02 machines or other analogue machines (for example, popular machines called mini-faxes) do not transmit TSI signals or N.
Since there is no SS signal, this is also completely excluded from password screening.

In this way, the above-mentioned password-based selection of transmission sources is limited to transmitting stations that have a special function of inserting their own password into the TSI signal or NSS signal and transmitting it, and other transmitting stations cannot be screened. It was not possible to select passwords as sources for information reception.

The present invention has been made in view of the above-mentioned problems, and it is possible to expand the selection of senders based on passwords, and to enable password selection of low-priced machines or models other than 03 machines as senders for image information reception. The purpose is to provide an image communication device.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention detects a DTME signal from a public communication line connected to an unspecified terminal, and converts the code of the detected DTMF signal into a password registered in advance. The device is configured to check whether the image information can be received from the line or not based on the result of the check.

Effect of the present invention With the above-described configuration, the transmitting side does not have a special function of inserting its own password into the TSI signal or NSS signal and transmitting it.
Even with models that do not send S signals, for example, by using a DTMF transmitter for dialing that comes with an external telephone, you can easily send out a password for the receiving side to identify your own station. Therefore, it is possible to expand the selection of senders based on passwords, and to select low-priced machines or models other than 03 machines as the sender of image information reception and the password.

Example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a schematic configuration of an image communication device according to an embodiment of the present invention, where L is a public telephone line connected to an unspecified terminal, l is an external telephone, 2 is a line switching circuit, and 3 is a public telephone line connected to an unspecified terminal.
is an NCU (line control unit); 4 is a modem that modulates and demodulates binary code signals; 5 is an image information processing unit that encodes and decodes transmitted and received image information; and 6 prints received image information on recording paper. 7 is a reading unit that reads transmitted image information from a document, etc.; 8 is an operation unit; 9 is a non-volatile memory part in which a predetermined specific password is registered; 10 is the operation of each of the above-mentioned parts. 11 is a DTMF detection unit that detects a DTMF signal from the line.

Here, the control unit IO is configured using a microcircuit-based general-purpose information processing device, so-called microcomputer, and has the following control functions in addition to the control functions of the facsimile machine standardized as 03 machine. is added by software.

That is, a first verification section 12, a second verification section 13, a timer 14, and the like are added.

The first collation unit 12 uses the code of the DTMF signal detected by the DTMF detection unit 11 and the memory part 9.
Check against the password registered in .

The second verification unit 13 verifies the password inserted into the TSI signal (or NSS signal) from the transmitting side and the password registered in the memory part 9 before receiving the image information. - Note that the password is registered in advance using the operation unit 8.

The timer 14 starts counting a certain period of time upon detection of an incoming call by the NCU 3, and temporally controls the operations of the first and second collation units 12 and 13 after the incoming call.

1st. The verification results of the second verification section 12.13 serve as a control information source for the line switching circuit 2. By controlling the connection/disconnection of the line L based on the collation result of the first and second collation unit 12.13, it is possible to control whether image information can be received from the line L. .

The operation of the image communication apparatus configured as described above will be described below.

FIG. 2 schematically shows the operation of the main parts of the image communication device shown in FIG.

1 and 2, first, in a normal standby state, the line switching circuit 2 connects the line to the NCU 3 side. In this state, when the NCU 3 detects a calling signal from the line and performs the so-called automatic call processing, the timer 14 starts counting a certain period of time (
SL).

During a certain period of time counted by the timer 14, an operation is performed to detect a DTMF signal from the line (S2, S8
).

Here, if a DTMF signal is detected from the line before the certain period of time elapses, that is, before the timeout, the code of the detected DTMF signal and the password registered in the memory 9 are First collation unit 12
(S3).

If the result of the above matching is a match, a predetermined procedural operation for starting reception is executed, and then the process moves to an operation of receiving image information, which is actual information (S4, S5 and S6).

If the results of the above verification do not match, a DcN (line disconnection) signal is issued, and then a switching command is sent to the line switching circuit 2 to disconnect the line from the NCU 3 side, thereby rejecting the reception of image information. (S4°S7).

On the other hand, if no DTMF signal is detected from the line until the time measured by the timer 14 elapses, that is, until it times out, a predetermined procedure operation is performed to start reception. It will be done. During this procedure, the transmitter receives a TSI signal or NSS signal.
The password inserted into the signal and sent and the password registered in the memory 9 are checked by the second verification unit 13.
(S9, 10).

If the result of the above matching is a match, the process moves to receiving image information, which is actual information (Sll).

S6).

If the results of the above comparison are inconsistent, a DCN (line disconnection) signal is issued, and then a switching command is sent to the line switching circuit 2 to disconnect the line from the NCU 3 side, thereby rejecting the reception of image information. (Sll.

512).

As described above, the DTMF signal or TSI signal (N
It is possible to automatically determine whether or not the sender is the recipient of the image information by determining whether or not the sender is the recipient of the image information, based on the password sent by any of the signals (SS signal).

As a result, even if the transmitting side does not have a special function to insert its own password into the TSI signal or NSS signal and send it out, or even if the transmitting side does not send out the TSI signal or NSS signal, it is possible to By using the DTMF transmitter for dialing that comes with the telephone, it is possible to easily send out a password for the receiver to identify their own station. Therefore, on the receiving side, it is possible to expand the selection of transmission sources based on passwords, and to select low-priced machines or models other than 03 models by password as transmission sources for image information reception.

Effects of the Invention As is clear from the above explanation, the present invention detects a DTMF signal from a public communication line connected to an unspecified terminal, and converts the code of the detected DTMF signal into a password registered in advance. By verifying and controlling whether or not image information can be received from the above line based on the result of this verification, the transmitting side can also have a special function that inserts its own password into the TSI signal or NSS signal and sends it out. Even if the device does not transmit TSI or NSS signals, it is possible to identify your own station to the receiver by using, for example, a DTMF transmitter for dialing that comes with an external telephone. Since it is possible to easily send a password that cannot be received, it is possible to expand the selection of senders based on passwords, and to select low-priced machines or models other than 03 as senders for receiving image information, and screen passwords. This has the effect of making it possible to

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an image communication device according to an embodiment of the present invention, FIG. 2 is a flowchart showing a schematic operation of the main part of the device, and FIGS. 3 and 4 are reception by a conventional image communication device. It is a figure showing operation of a starting procedure. L...Public telephone line (communication line), 1...External telephone, 2...Line switching circuit, 3...NCU (line control unit), 4...Modem, 5...Picture information processing Department,
6...Recording section, 7...Reading section, 8...Operation section, 9
...A part of non-volatile memory where passwords are registered,
DESCRIPTION OF SYMBOLS 10... Control part, 11... DTMF detection part, 12.
...First verification section, 13...Second verification section, 14...
·timer

Claims (1)

[Claims] DTMF detection means for detecting a DTMF signal from a communication line; registration means for registering a password; collation means for comparing the DTMF code detected by the DTMF detection means with the password registered by the registration means; an image communication device comprising: control means for controlling whether image information can be received from the line based on the comparison result of the comparison means;