JPS6180952A - Automatic selecting method of transmission mode of facsimile equipment - Google Patents

Abstract

PURPOSE:To execute exactly and automatically a selection of a transmission mode by selecting a procedure of existence of reception of a signal for showing a fact that the other terminal is a non-voice terminal, and transmitting a control signal from the own device. CONSTITUTION:When an NCU (network controlling circuit) is operated, and a call is executed, a control signal is delivered to a CPU3 from the NCU. The CPU3 checks whether a signal CED for showing a fact that the other terminal is a non-voice terminal exists in a signal sent from the other terminal or not. It is executed by checking an output of a tone signal detecting circuit 1,because the CED is a signal of 2,100Hz. In accordance with whether this CED has been confirmed or not, the CPU3 selects one of transmission control procedures of two systems, and can execute automatically a selection of a transmission mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a method for automatically selecting a transmission mode when transmitting an image signal or a character code in a facsimile machine.

[Technical background of the invention]

Conventionally, in facsimile machines, it has been common to select a transmission mode from the facsimile machine. Selection of this transmission mode is typically performed by an operator manually operating keys on the operation panel of the facsimile machine.

[Problems with background technology]

However, the above transmission mode selection method is complicated because the operator has to check all executable transmission modes of the other party's facsimile machine. The purpose of the present invention is to provide an automatic transmission mode selection method for a facsimile machine, which allows the facsimile bag itself to accurately and automatically select the transmission mode.

[Summary of the invention]

Therefore, in the present invention, based on the presence or absence of reception of a signal sent from the other party terminal indicating that the other party terminal is a non-voice terminal, the control signal that should be sent first from the other party terminal is not received. The first step is to transmit a control signal containing transmission mode data from the terminal, and the control signal 6 containing transmission mode data is transmitted from the own terminal even if the control signal to be sent from the partner terminal is not received. By switching and executing the second one, the above objective t- is achieved.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of a main part of a facsimile machine that employs a method according to an embodiment of the present invention. In the figure, 1 indicates a tone detection circuit. The tone detection circuit 1 detects a single frequency tone signal on the line 5. 2 indicates a 300 bps detection circuit. This 300 bPs detection circuit detects a binary code control signal of the facsimile transmission control procedure of CCITT Recommendation T.30. 6 is a tone signal sending circuit that sends out a tone signal of a single frequency; 7 is a CCITT # notification T;
This is a 300 bps sending circuit that sends out data at 0 bps. 3 indicates a CPU, and this CP TJ 3 is based on CCITT Recommendation T.
, 3, T, 4 G2 mode, G3 mode, 1! 6′″″″″″″I#tH: &5. its・C
The CPU 3t"5 has a program of the flowchart shown in FIG. 1 for automatic weekly selection of the J-signal mode. Furthermore, the CPU 5 transmits and receives message information of image signals or character codes via the modem 4.

Next, when a call is made from the facsimile machine in Figure 2,
The operation of automatic transmission mode selection will be explained with reference to FIG. 1. An NCU (network control circuit), not shown, operates, and when a call is made, control is passed from the NCU to the CPU 3.

Therefore, in step 101, the CPU 3 checks whether a signal CED indicating that the terminal is a voiceless terminal transmitted from the facsimile machine on the called side has been received. Since the signal CED is a 2100Hz signal, the CPU3
Is it the output of tone signal detection circuit 1? :Execute step 101e by checking. Here, if the signal CHD is not received, a branch is made to NO, the first procedure consisting of steps 102 to 104 is performed, and the signal CH
If D has been received, the process branches to YES and performs the second step jjiif consisting of steps 105-1)1.

First, the first procedure will be explained. CPU3 performs step 1
At 02, it is checked whether the first control signal S transmitted from G31:l has been received.

The control signal DNS is a binary code signal,
The CPU 3 checks the output of the 300 bPs detection circuit 2. Here, when the control signal DIS is received, YE
The CPU sends the called party's facsimile to G3.
Since it is ff1, the sending mode based on the G3 mode is selected, and to indicate this, the control signal D CS t-300bp is sent.
S sending time l! 87, and thereafter executes the transmission control procedure in G3 mode. Further, in step 102, the control signal D
If I3 is not received, the process advances to step 103, and G
Check whether the first control signal GI sent from 25 has been received and is valid.

Since the Japanese signal G is a single-frequency signal of 1850 kHz, the CPU 3 examines the output sound of the tone detection @route 1.

Here, when the control signal GI is received, the facsimile machine on the called side is the 02 machine, so the CPU 3 branches to YF, 8, selects the G2 mode, selects the f, 1 mode, and selects this mode. A control signal GC for indicating is sent from the tone signal sending circuit 6, and hereafter G2 mode and Fi5 transmission control f,
! Execute move 1::n. If the control signal GI is not received in step 103, the CPU 3 proceeds to step 104 and checks whether 30 seconds have passed since the line was connected. This 30 seconds is a predetermined time for detecting the first control signal sent from the facsimile machine of the called party, and can be made shorter or longer as necessary. here 30
If seconds have not elapsed, return to step 101, and
When the additional seconds elapse, the CPU 3 issues an alarm (not shown).
Sounds to request operator intervention.

Next, the second procedure will be explained. CPU3 performs step 1
At step 05, disconnection of the signal CBD is confirmed, and step 10
6. Proceed to 107. This step 106 is step 10
2, step 107 is similar to step 103,
Since this has already been described, the explanation thereof will be omitted. If the control signal ()I is not received in step 107, the CP
U3 proceeds to step 108 and checks whether 3 seconds have elapsed since the signal CBD was disconnected. These 3 seconds are CCIT
Recommendation T, 30, paragraph 4.3.3.2 states: ``The called station shall delay transmission for 75±20 ms after the end of C'BD)-- before transmitting the signal. ” because it is stipulated that
This time is set to 3 seconds after the signal CHD is disconnected, allowing for a margin. Here, if 3 seconds have not passed, step 1
Returning to step 06, when 3 seconds have passed, the CPU 3 proceeds to step 109, selects the mini-fax mode, and transmits the control signal MPHa for mode designation and phase synchronization of the Z-Nifax to the tone signal sending circuit. Send from 6. Next, the process proceeds to step 1)0, where the called side facsimile machine sends a control signal MCF)- indicating that reception is ready.
Check whether tone detection circuit 1 is receiving the signal. here,
When the control signal MCFR is received, the CPU 3 executes subsequent transmission control procedures in the transmission mode of the mini-fax mode. Also, in step 1) 0, the control signal M
If CFP- is not received, the CPU 3 proceeds to step 1) 1, sends the control signal MPHi9'i, and then
Check whether 0 seconds have passed. If 30 seconds have not elapsed, the process returns to step 109. If 30 seconds have elapsed, it is abnormal and the CPU 3 will sound an alarm (not shown) and request operator intervention.

According to the embodiment, when the signal CBDI is received, the transmission mode with the called terminal is G3 mode, G2 mode, etc.
mode, mini fax mode,
Transmission mode can be set to automatic. Therefore, the control signal t-
Determining the transmission mode between the mini-fax and the one that needs to be sent from the calling party first? This can be done automatically and quickly without relying on an operator.

〔Effect of the invention〕

As explained above, according to the present invention, the transmission Q from the other party's terminal is
Select the procedure based on whether or not a signal indicating that the other party's terminal is a non-voice terminal is received, and send mode data from the own device? Since all control signals included in the transmission are transmitted, the selection of the transmission mode is performed automatically and accurately, and the operator does not have to worry about confirming the operable transmission modes of the other party. .

[Brief explanation of the drawing]

FIG. 1 is a flowchart for explaining one embodiment of the present invention, and FIG. 2 is a block diagram of a main part of a facsimile machine operating from fR1C, which is an embodiment of the present invention. 1...Tone detection circuit 2-300 bps detection circuit 3...CPU 4...Modem 5...Line 6...Tone signal sending circuit 7...300 bps sending circuit Agent Patent attorney U1■ Noriyuki Chika ( (and 1 other person) Figure 1 Figure 2

Claims (3)

[Claims] (1) Based on whether or not a signal sent from the other party's terminal indicating that the other party's terminal is a non-voice terminal is received, the own terminal transmits the signal unless the control signal that should be sent first from the other party's terminal is received. a first procedure in which a control signal including mode data is not transmitted; and a second procedure in which a control signal including transmission mode data is transmitted from the own terminal even if the control signal to be initially transmitted from the partner terminal is not received. 1. A method for automatically selecting a transmission mode for a facsimile machine, characterized in that the transmission mode is switched and executed. (2) A method for automatically selecting a transmission mode for a facsimile apparatus according to claim (1), characterized in that the second procedure is executed when a signal indicating that the other party's terminal is a non-voice terminal is received. . (3) In the second procedure, after waiting for the reception of the control signal that should be sent first from the other party's terminal for a shorter predetermined time than in the first procedure, when the control signal is not received, the self-device transmits the control signal. A method for automatically selecting a transmission mode for a facsimile machine according to claim 1 or 2, characterized in that a control signal including mode data is transmitted.