JPS60242768A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To prevent the possibility of malfunction due to a noise on a line by providing a means for starting the facsimile equipment through the transmission/ reception of a G3 procedure signal in the facsimile equipment communicated via a private line. CONSTITUTION:The private line 1 is connected to an NCU (network control unit) 2 controlling the connection of the line. A G3 MODEM3 is connected to the post stage of the NCU2. In the step S24, the flag of the G3 procedure is transmitted. That is, the G3 MODEM3 generates repetitive data of [01111110] in the Baud rate 300bps and it is transmitted to the private line 1 for 1sec via the NCU2. The timer is started simultaneously with the transfer to the step S25. When 4.5sec is elapsed, the step is restored to the step S24, and when not, the step restores to the step S25. When a flag is detected by the step S25, the step is transferred to the step S27, and the known transmission in the G3 mode is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a facsimile device, and particularly to a facsimile device that performs communication using a dedicated line.

[Prior art]

2. Description of the Related Art Conventionally, facsimile devices are known that perform image communication with a specific communication partner using a dedicated line. This type of device is designed to start up using a tonal procedure that complies with CCITT (International Telegraph and Telephone Consultative Committee) recommendations.

For example, since automatic reception was started by a tonal signal of 2100 Hz or 462 Hz, there was a drawback that noise on the line could be mistaken for a starting signal and the starting operation would continue.

〔the purpose〕

The present invention solves the above-mentioned conventional drawbacks, and aims to provide a facsimile machine that does not malfunction due to line noise.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows an embodiment of a facsimile apparatus according to the present invention, and the reference numeral 1 in the figure is a dedicated line provided between the facsimile apparatus and a specific communication partner. The dedicated line 1 is connected to a network control unit (N, CU) 2 which controls connection of the line. A G6 modem 6 is connected to the rear stage of the NCU 2.

The G3 modem 3 performs G3 mode modulation and demodulation specified in CCITT Recommendation T4, 03 procedure, and transmission and reception of image signals.

The G6 modem 6 is controlled by a CPU (Central Processing Unit) 4 in accordance with CCITT Recommendation T3 Recommendation System 30 order. The CPU 4K is connected to a memory 5 for storing T30 control procedure programs, device control programs, image signals, and the like.

Image reading is performed by a reading section 6 comprising a CCD sensor, an original conveyance system, and the like. The read image data is modulated by the G3 modem 3 and sent to the dedicated line 1 via the NCU 2.

On the other hand, the received data is demodulated by the G3 modem 6 and sent to the recording section 7. The recording section 7 is composed of a thermal printer, an inkjet printer, or the like.

The CPU 4K is connected to an operation section 8 consisting of a numeric keypad or a display for inputting operations such as starting transmission and reception.

Next, the operation of the facsimile machines configured as described above will be explained in detail with reference to the flowchart shown in FIG. FIG. 2 shows an example of a standby program in the apparatus of the present invention.

In the standby state, first, in step 821 of FIG.
Detects the press of the transmission start button provided on the If a button press is detected, the process moves to the transmission routine starting from step 824. If no button press is detected, the process moves to step 822.

In step 824, a flag is transmitted according to the 03 procedure. i.e. borley) at 300 bps [0111111
0J repeat data is created by 06 modem 3 and sent to dedicated line 1 via NCU 2 for 1 second.

Next, in step 825, it is checked whether the same flag has been detected, and then in step S26, it is checked whether the 4.5 second timer has been typed up. This timer is started simultaneously with the transition to step S25. 4
．． If 5 seconds have elapsed, the process returns to step S24; otherwise, the process returns to step 825. That is, the operation of transmitting the flag for 1 second and then detecting the flag on the second side for 4.5 seconds is repeated.

If the flag is detected in step 825, the process moves to step 827, and a known transmission operation in G6 mode is performed.

On the other hand, in step 822, a flag on the leased line 1 is detected. That is, the flag of the calling side transmitted in step 824 is detected. If the flag is detected, the process moves to step 825, and if it is not detected, the process returns to step S21 to detect the send button.

In step 823, a known reception operation in G6 mode is performed. That is, as an initial identification signal, a 1 second flag and a DIS (digital identification) signal are transmitted at 3 second intervals. This signal is detected in step S25. The subsequent operations are performed in the same manner as the known 03 communication.

As described above, by performing a call by continuously transmitting flags, it is possible to significantly reduce the possibility of malfunctions caused by line noise.

Furthermore, since a special tonal signal transmitting/receiving circuit for a dedicated line is not required, the apparatus can be constructed easily and inexpensively.

According to the present invention, since the hardware configuration is the same as that of a general 03 facsimile machine, it can be used as a facsimile machine for 稶A-7'口〃侹入一蔔子所ねな入DAll+-/'小田 Tsunada. There are advantages.

In the above embodiment, the calling operation is carried out by transporting the flag, but instead of the flag, CRP signal etc.
Other control signals for the mode may also be used.

〔effect〕

As is clear from the above description, according to the present invention, in a facsimile device that performs communication operations via a dedicated line provided between a specific communication partner, means for starting the device by transmitting and receiving a 06 procedure signal. Since the facsimile apparatus adopts a configuration in which the facsimile apparatus is provided with the following, it is possible to provide a simple, inexpensive, and excellent facsimile apparatus that does not malfunction due to noise on the line.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to the present invention, and FIG. 2 is a flowchart explaining the control procedure of the CPU in FIG. 1... Dedicated line 2... NCU 6... G6 modem 4... CPU 5... Memory 6... Reading section 7... Recording section 8... Operation section agent Patent attorney Taku Fuji

Claims (1)

[Claims] A facsimile device that performs a communication operation via a dedicated line provided between a specific communication partner, characterized in that the facsimile device is provided with means for activating the device by transmitting and receiving a 03 procedure signal. .