JPS62269564A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To automatically discriminate a G3 machine, a G2 machine, a quarter machine, etc., by detecting the frequency of a receiving signal and simultaneously detecting the disconnection of the signal. CONSTITUTION:The signal of a digital instruction signal (DCS) sent by a G3 machine or a non-standard function setting signal (NSS) is an FSK (FM) modulating signal of 1650 Hz and 1850 Hz and not the signal of the single tone, and Fl ag data at the first part of the signal are considered as the signal of 1650 Hz and processed. When a transmitting side facsimile device is a G2 machine, the device sends a GC signal(2100Hz), an LCS signal (1100Hz) and a PHS signal (2100Hz). Further, when a quarter machine is a transmitter, a phase signal (2500Hz) is sent. An FMX control circuit 12 of a receiving side facsimile device 11 sets a MODEM 15 to a tonal receiving mode and discriminates the opponent machine type with the frequency of the received signal. 13 timer circuit 1 4 counter circuit 158 buffer 159 filter 152,153,154,155:MO DEM, 156: (tonal) transmitting receiving circuit, 157: signal detecting circuit, 151: (G3, G2 telephone FAX quarter) MODEM control circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a facsimile machine that is a single model and has a plurality of facsimile communication means, and also has a function of automatically identifying a plurality of other party models. .

2. Description of the Related Art Conventional facsimile machines of this type include, for example, CC
A single type of facsimile machine equipped with facsimile communication means of G3 type facsimile (hereinafter referred to as 03 machine) and G2 type facsimile (hereinafter referred to as G2 machine) according to the recommendations of ITT (International Telegraph and Telephone Advisory Committee), A telephone fax machine (hereinafter referred to as a 4-minute machine) to which a facsimile communication means is added is known.

FIG. 4 is a block diagram showing the general configuration of the device. As shown in the figure, the facsimile device 1 of a single model, which has multiple functions of the G3 machine, 02 machine, and 4-minute machine, controls the entire device. A dedicated modem 3 for the G3 and 02 machines, a phase signal detection circuit 4 for the quarter machine, a dedicated modem 5 for the quarter machine, and a network control circuit 6. .

Therefore, in response to the signal from the line 7, apart from the operation of the G 3 and G2 exclusive modem 3, the AM modem 5 of the 4-minute machine
- The signal is demodulated by a modulation/demodulation circuit 51 of the DSB modulation/demodulation method, and the phase signal is detected by the phase signal detection circuit 4 for the quarter divider.

Therefore, no matter which signal from the 03 aircraft, the 02 aircraft, or the 4-minute aircraft is input through line 7, these signals are automatically discriminated.

Problems to be Solved by the Invention However, with this configuration, as is clear from the above, a new mounting space is required for the phase signal detection circuit 4 for the quadrant and the modem 5 exclusively for the quadrant. If there is not enough space in a single model facsimile machine to which a new function (circuit) 4.5 is to be added, there is a problem in that it is difficult to implement the new function (circuit) 4.5.

There is also a problem that the cost increases by the addition of the function (circuit) 4.5.

As a solution to the above problem, for example, in FIG.
The AM-DAB modulation/demodulation circuit 51 of the modem 5 dedicated to the splitter is simply incorporated into the modem 3 dedicated to G3 and G2, and the modem control circuit 52 dedicated to the 4-brancher is also used in the modem control circuit 31 of the modem 3 dedicated to G3 and G2, There is a method in which the processing of the quarter-divider phase signal detection circuit 4 is performed by the FAX control circuit 2. This method certainly improves space and cost issues.

However, according to this method, G3, G2 dedicated modem 3
It became necessary to perform all the processing of each circuit 32 to 36 in the G3 and G2 modem control circuits 31 only, and the processing of the AM-D and SB modulation/demodulation circuits 51.
This will be done in the same way as the method used to determine the received signals of the aircraft and the G2 aircraft.

In other words, the determination of the quadrant is performed by detecting the frequency of the received signal by the tonal transmitting/receiving circuit 35 in the modem 3 dedicated to G3 and G2.

However, since the signal part of the phase signal (2500Hz) of the quarter splitter is very short compared to the distance between the signals (Fig. 2 fd)
), the tonal transmitting/receiving circuit 35 cannot accurately detect the phase signal (2500 Hz), and when using the above method, there is a problem that automatic discrimination of the quarter divider is impossible.

The present invention was made in view of the above-mentioned problems, and is a small and inexpensive device that can automatically identify not only the 03 aircraft and G2 aircraft but also the 4-minute machine (other compatible models). The purpose is to provide a facsimile machine that is easy to use.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention is provided with a configuration in which not only the frequency of the received signal but also the discontinuation of the signal is detected.

Effect of the present invention With the above-described configuration, the received signals of 03 aircraft, 02 aircraft, etc. can be determined by detecting the frequency of the signal, and the phase signals of 4-divider aircraft, etc. can be determined by the intermittent signal. Automatic identification of 03 aircraft, 02 aircraft, 4-minute aircraft, etc. is possible.

Embodiment FIG. 1 is a schematic block diagram showing an embodiment of a facsimile apparatus according to the present invention. ) control circuit] 2, a timer circuit (to which a predetermined time is set) 13, a counter circuit (to which a predetermined value is set) 14, and a single multifunction modem 15 connected to the FAX control circuit 12, and the modem. 1
The network control circuit 16 generally includes a network control circuit 16 connected to the network control circuit 5.

Note that 17 is a line.

The single multi-function modem 15 has a modem control circuit 151 (in this embodiment, a modem control circuit for G3, 02, and 4-way machines) that controls the modem, and multiple types of modulation/demodulation functions. For example, a modulation/demodulation circuit (hereinafter referred to as V21 modulation/demodulation circuit) 152 of the FSK (FM) modulation/demodulation method (V21 standard recommended by the CCITT), which cannot operate all of these modulation/demodulation functions simultaneously, PM) Equal Modulation/Demodulation (CCI)
TT Recommendation V29, ■2'7 etc. standard) modulation/demodulation circuit]
53, AM-PM-VSB modulation/demodulation system (CCITT Recommendation 02 machine standard) modulation/demodulation circuit (hereinafter referred to as AM-PM-VSB modulation/demodulation system
A modulation/demodulation circuit (hereinafter referred to as A, M-DSE modulation/demodulation circuit) 154 for the AM-DSB modulation/demodulation method (for quarter-divider) 155, and a transmitting/receiving circuit 156 having a frequency analysis function for transmitting/receiving signals (tonal signals). It does not have a demodulation function and only has a signal arrival (arrival) or intermittent detection function. It consists of a signal detection circuit 157, a signal sending modem buffer 158, and a received signal filter circuit 159.

The network control circuit 16 includes hybrid circuits 161 and 162 having a function of separating transmitting and receiving signals, and a line transformer (
(for AC connection with line 17 and maintenance of line 17) 16
Consists of 3.

FIGS. 2(aJ to d) show the structure of the signal received by the facsimile machine (receiver) 11 shown in FIG. 1, in other words, the signal sent by the facsimile machine (transmitter) on the sending side. In the block diagrams shown, (a) shows the structure of the communication procedure signal of the G3 aircraft, and (b) shows the structure of the flag data (signal) in the communication procedure signal of the G3 aircraft. Figure (C) shows the group command signal (QC) of G2 aircraft.
), transmission line adjustment signal (LC8) and phase signal phase signal (
In the same figure, dl shows the configuration of the phase signal (2500 Hz) of the quadrupler.

Next, regarding the facsimile machine 11 having the above-described configuration, the reception signal discrimination shown in FIG. 3 is carried out.

The operation will be described below with reference to a flowchart of the processing operation performed by the FAX control circuit 12.

In FIG. 3, when reception is started, the FAX control circuit 12 instructs the modem control circuit 151 to set the modem 15 to tonal transmission mode (ST 1). Next, the called station identification signal (C
ED) to send out a 2100Hz tonal signal for a certain period of time (ST2).

Upon receiving these instructions, the modem control circuit 151 sets the transmitter/receiver circuit 156 to the transmit mode and transmits the tonal signal 2100H7. This tonal signal (2100H7
, ) are sent to the network line 17 via the buffer 158 in the modem 15 and through the network control circuit 16 .

Next, the FAX control circuit 12 includes a modem control circuit 15.
1 to set the modem 15 to FSK (FM) modulation/demodulation transmission mode (5T3), followed by the non-standard function signal (NSF), called terminal identification signal (C8I) and digital communication procedure signal of the 03 machine. Identification signal ([IS)
The binary data of is input to the modem control circuit 151 (S
T4).

The modem control circuit 151 sets a V21 modulation/demodulation circuit 152 of the FSX (FM) modulation/demodulation system to a modulation mode, and this circuit 152 modulates the NSK, C3I, and DIS binary data. The modulated NSK, C8I, and DIS signals are sent to the line 17 via the modem buffer 158, the hybrid circuit 161 of the network control circuit 16, and the line transformer 163.

After sending these signals (NSF, C8I, and DIS), the FAX control circuit 12 sets a predetermined time n to the timer of the timer circuit 13 (ST5), and then sets a predetermined value m to the counter of the counter circuit 4. Do (ST
6).

After that, the FAX control circuit 12 controls the modem control circuit 151
to set the modem 15 to tonal reception mode (ST7). Upon receiving the instruction, the modem control circuit 151 sets the transmitting/receiving circuit 156 to the receiving mode, and also operates the signal detecting circuit 157 to monitor the arrival of a signal from the transmitting side (ST8).

On the other hand, if it is a G3 machine, the sending facsimile device receives and analyzes the NSF, C3I, and DIS signals sent from the network control circuit 16 of the receiving facsimile device 11, and outputs a digital command signal (DO8) or non-digital command signal (DO8). It sends out standard function setting signals (NSS).

Note that the DC8 or NSS signal sent out by the 03 aircraft is a 1650Hz, 1850H, L FSX (FM) modulated signal and is not a single tone signal. However, Figure 2 fa
), the sequence of signals called Flag data at the beginning of the signal is 1650 as shown in the figure (bl).
There are many Hz components. Therefore, the modem 15 treats the continuous portion of the signal as a 1650 Hz signal.

In addition, if the sending facsimile device is a G2 machine, the device receives a GC signal (2100H) as shown in Figure 2 (C).
2), LC3 signal (110o) (Z) and PH8 signal (2100Hz) are sent out.

Furthermore, if the quadrant is a transmitter, it will send out a phase signal (2500 Hz) as shown in Figure 2(d). is the network control circuit 1 of the receiving facsimile machine 11 from the line 17.
Line transformer 163 and hybrid circuit 16 in 6
2 to the modem 15. The signal input to the modem 15 passes through a filter circuit 159 to each circuit 15.
2 to 157. At this time, the circuits operating in the modem 15 are a transmitting/receiving circuit 156 and a signal detecting circuit 157.
It is.

By the way, the receiving side facsimile IJ device 11
After sending the F, C3I, and DIS signals, the model of the transmitting side (transmitter) (in this example, 03 aircraft, G2 aircraft, and 4-segment aircraft) is unknown until the signal is received from the transmitting side. It is not possible to set a specific reception mode for a G3, G2, or 4-minute machine and wait for that signal input.

Therefore, the FAX control circuit 12 of the receiving facsimile machine 11 sets the modem 15 to tonal reception mode, and first determines the type of the other party's machine based on the frequency of the received signal.

That is, when the signal detecting circuit 157 detects a signal of a certain signal level or higher, regardless of the type of received signal, the signal from the transmitting side is input to the modem 15. The modem control circuit 151 is informed that there is an incoming call (signal reception). The modem control circuit 151 further notifies the FAX control circuit 12 of this fact.

At the same time, after the modem control circuit 151 detects the signal reception by the signal detection circuit 157, the modem control circuit 151 checks the received signal analysis result of the transmitting/receiving circuit 156 for the received signal,
The frequency of the received signal is transmitted to the FAX control circuit 12.

The FAX control circuit 12 checks the frequency of the received signal, and if the frequency is 2100Hz (ST10
YES), it is determined that the GC signal is received from the G2 machine, and the modem control circuit 151 sets the modem 15 to AM-PM.
- Instruct to set to VSB modulation/demodulation reception mode. The modem control circuit 151 that received the instruction receives the AM-PM-V
Set the SB modulation/demodulation circuit 154 to demodulation mode (STI
I). Thereafter, the FAX control circuit 12 performs the communication procedure for the 02 machine.

On the other hand, the FAX control circuit 12 checks the frequency of the analysis result, and if it is 1650Hz (YES in ST12)
, judged to have received a DC3 or NSS signal from aircraft 03,
FSK modem 15゛ for modem control circuit 151
(FM) Instructs to set to modulation/demodulation reception mode.

Upon receiving the instruction, modem control circuit 151 sets V21 modem circuit 152 to demodulation mode (ST13). Thereafter, the FAX control circuit 12 performs communication procedures for the G3 machine.

As described above, the FAX control circuit 12 determines the destination model (02 machine, 03 machine) based on the frequency obtained from the analysis result of the received signal by the transmitting/receiving circuit 156.

By the way, when the transmitter is a 4-minute transmitter, it sends out the phase signal (2500Hz) shown in Fig. 2(d), as described above, but the time of that signal part (11ms) depends on the distance between the signals. This is extremely short compared to the time (222m5). Therefore, the signal detection circuit 157 can detect the presence or absence of the phase signal (received signal), that is, its discontinuity, but the transmission/reception circuit 156 can accurately detect up to the frequency based on the analysis result of the phase signal (received signal). Can not do it. Therefore, in that case (quadrant machine), it is impossible to distinguish the model based on the frequency of the received signal.

Therefore, the FAX control circuit 12 checks the intermittent state of the phase signal (received signal) based on the input information from the timer circuit 13, the counter circuit 14, the modem control circuit 151, and the signal detection circuit 157, and makes the determination based on the intermittent state. Distinguish the impossible model (4-minute machine).

That is, as a result of checking the frequency of the received signal, the FAX control circuit 12 finds that the frequency is not even 2100Hz (ST
IO No), nor 1650Hz (ST12 N
o), check the elapse of the set time n of the timer circuit 13 (ST14), and if n hours have elapsed (n=o),
Proceed to ST 18. If n hours have not elapsed (NO in ST14), the signal detection circuit 157 checks whether the received signal is disconnected (ST15).

Therefore, if signal disconnection is not detected (NO of SrI2)
, proceed to ST 1.0. If rattling or signal interruption is detected (YES in ST15), the predetermined value m set in the counter of the counter circuit 14 is decremented by 1 (ST16).

As a result, if the value of m-1 is not It OII, then
Proceed to ST8. If the value of Kadaya m-1 becomes lゝ0'' (
(YES in ST16), the FAX control circuit 12 determines that the currently received signal is a quarter-divider phase signal, and instructs the modem control circuit 151 to set the modem 15 to AM-DSB modulation/demodulation reception mode. give. Upon receiving the instruction, modem control circuit 151 sets AM-DSB modulation/demodulation circuit 155 to demodulation mode (ST17).

Thereafter, the FAX control circuit 12 performs the communication procedure for the quarter machine.In this way, the quarter machine which could not be determined based on the frequency is determined.

Effects of the Invention As is clear from the above explanation, the present invention detects the frequency of the received signal and also detects the discontinuity of the signal. can be determined by the frequency detection, and a phase signal such as a quarter divider, which could not be determined by the frequency detection, can be determined by the discontinuity of the signal. Therefore, automatic discrimination of G3 aircraft, G2 aircraft, 4-minute aircraft, etc. is possible.

Further, according to the present invention, there is no need to provide a phase signal detection circuit dedicated to the quadrupler or a modem dedicated to the quadrupler, as is the case in the past, so the device can be made smaller and less expensive.

Further, according to the present invention, it is possible to realize a facsimile machine that is small and inexpensive and can automatically identify a plurality of recipient models.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration block diagram showing an embodiment of a facsimile apparatus according to the present invention, and FIGS. ), (b) are signal block diagrams of CCITT recommendation G3 type 77 Kushimiri (03 aircraft), and (C) of the same figure is CCITT recommendation
Recommendation G2 type facsimile (02 machine) signal block diagram,
The same figure (dl is a telephone fax machine with a 4-minute function)
FIG. 3 is a flowchart for explaining the processing operation of the FAX control circuit shown in FIG. 1, and FIG. 4 is a block diagram showing the schematic configuration of a conventional facsimile machine. 11...Facsimile device (receiving side/receiver), 12
...FAX control circuit, 13...Timer circuit, 14.
... Counter circuit, 15 ... Modem, 151 ... Modem control circuit, 16 ... Network control circuit, 17 ... Line. Name of agent: Patent attorney Toshio Nakao and 1 other person Figure 2 H←← 1z2H511fLf Procedural amendment (input) August 20, 1985

Claims (1)

[Claims] The device comprises a received signal frequency detection means, and a received signal intermittent detection means provided in series with the detection means, and the received signal intermittent detection means discriminates a model that cannot be determined by the frequency detection means. What is claimed is: 1. A facsimile device having a function of automatically identifying and communicating with multiple recipient models.