JPS6336673A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To simplify the equipment constitution by varying an amplification factor of an amplifier means in response to the facsimile communication method so as to integrate both functions of direct coupling and acoustic coupling types. CONSTITUTION:On-hook/off-hook state of a handset 23 of a telephone set 22 are detected by a network control section 21 and the amplification factor of an output amplifier 16 and an input amplifier 17 is varied from the network control section 21 in response to the detection state. In this case, in detecting the on-hook state, the amplification factor of the amplifiers 16, 17 is set to the 1st amplification factor to apply facsimile communication of the direct couple type, and in detecting the off-hook state, the amplification factor of the amplifiers 16, 17 is set to the 2nd amplification factor to apply facsimile communication of acoustic coupling type.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) This invention is capable of transmitting and receiving both image signals even when directly coupled to a telephone line and acoustically coupled via an acoustic coupler. Relating to facsimile equipment.

(Prior Art) There are two types of facsimile machines: a direct coupling type in which the facsimile machine is directly coupled to a telephone line, and an acoustic coupling type in which the facsimile machine is acoustically coupled via a telephone-like handset.

Since telephone lines are generally designed for telephone voice calls, their transmission frequency bandwidth is relatively narrow, ranging from 0.3 to 3
．． 4KH2, and in the case of voice calls, the delay distortion of the transmission line does not have much effect on the quality of the call, so consideration is not taken to reduce the delay distortion of the transmission line in the telephone line.

However, when transmitting a signal waveform instead of voice as in facsimile communication, sufficient transmission characteristics may not be obtained due to waveform deterioration due to delay distortion. Furthermore, transmission loss, attenuation distortion, etc., which do not pose much of a problem in voice calls over telephone lines, may not be ignored in facsimile communications.

The above-mentioned delay distortion, transmission loss, attenuation distortion, etc. have a greater influence on acoustic coupling type facsimile apparatuses than on direct coupling type facsimile apparatuses. This is because the acoustic coupling type facsimile apparatus transmits and receives signals via the acoustic coupling section, and the transmission loss of this acoustic coupling section is added. For this reason, acoustically coupled facsimile machines use amplifiers and circuit configurations that have different characteristics from direct coupled types to compensate for these various losses, and conventionally, direct coupled and acoustically coupled facsimile machines have been integrated into one device. However, there was no such thing that could be used in any of the following formats.

In addition, since the direct coupling type facsimile machine is directly connected to the telephone line without going through the above-mentioned J: Uni acoustic coupling part,
It has the advantage of less data loss and allows excellent data transmission, but since it is directly connected to the telephone line, connection work and procedures are required, so it is easy to move the installation location and change the connection. It cannot move and becomes fixed. However, the acoustically coupled type has the advantage that it does not require construction procedures to connect to a telephone line and can be easily moved.

Direct coupling type and acoustic coupling type facsimile machines each have their own advantages as described above, but as mentioned above, they require amplifiers with different characteristics and also have different circuit configurations. Of course, the direct coupling type requires a direct coupling section consisting of an amplifier for direct input/output, a hybrid lance, a V') converter between the telephone and facsimile line, etc., and the acoustic coupling type requires a An acoustic coupling section consisting of an amplifier according to the characteristics is required.

(Problem to be solved by the invention) Direct coupling type and acoustic coupling type each have their own advantages, but if you try to integrate the two, you will need two different scale amplifiers, and the problem will be high Due to the problem that it is economically undesirable, there has been no existing facsimile machine that integrates both functions and is convenient to use. was there.

The present invention has been made in view of the above, and an object thereof is to provide an economical facsimile apparatus having both direct coupling type and acoustic coupling type functions.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention provides a facsimile device that performs facsimile communication via a telephone line, and a direct connection part that is directly connected to the telephone line. an acoustic coupling unit that is acoustically coupled to the telephone line via the handset of the telephone; and an amplification unit that amplifies the modulated image signal for transmission to the telephone line and amplifies the modulated image signal received from the telephone line. means for detecting on-hook and off-hook states of a telephone connected to a telephone line; the detecting means detects off-knock and transmits an image (
70, the amplification factor of the amplification means is set to a first amplification factor, the detection means detects an off-knock, and the I! When transmitting and receiving image signals via the coupling section, the present invention further comprises amplification factor control means for setting the amplification factor of the amplification means to a second amplification factor.

(Function) The facsimile device of the present invention detects the on-footer of the telephone, sets the amplification factor of the amplification means to the first amplification factor when transmitting and receiving image signals via the direct connection part, and prevents the off-knock of the telephone. The amplification factor of the amplification means is appropriately varied according to the facsimile communication method, such as setting the amplification factor of the amplification means to the second amplification factor when detecting and transmitting and receiving image signals via the acoustic coupling section. are doing.

(Example) Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 1 shows communication 51! used in a facsimile line according to an embodiment of the present invention. 2 is a block diagram of the l-embedded circuit section 9, FIG. 2 is a perspective view showing the overall external configuration of the facsimile machine, and FIG. 3 is a block diagram of the entire facsimile machine.

As shown in FIG. 2, the facsimile machine of this embodiment is
It is roughly divided into a reading section 1 and a main body section 2, and is located on the right side of the main body section 2. ′
111 has a direct v'i coupling section 6 and an acoustic coupler 7, and is configured to enable both direct coupling type and acoustic coupling type facsimile communication. In addition, in FIG. 2, this facsimile machine inserts a document 4 to be sent from the front, reads it, and sends it to the other party's device. 8, the receiving paper 5 on which the image signal received from the other party's device is recorded is taken out from the rear of the device.

This facsimile device is connected to a telephone line via the direct coupling section 6 and the acoustic coupling section 7, and performs facsimile communication with the other party's facsimile machine via the telephone line. As shown in FIG. 3, is connected to a communication processing circuit section 9, and via this communication processing circuit section 9 is connected to a reading section 11 [j circuit section 10 and a recording processing circuit section 11. The reading processing circuit section 10 is a section that optically scans and reads image signals of characters, pins, etc. on the document 4 to be sent, for example, and converts them into electrical image signals, and the recording processing circuit section 11 is a section that converts them into electrical image signals. This is the part that reproduces and records the image signal received from the receiver as images such as characters and pictures on the receiving MiS.

The facsimile machine further includes a control circuit section 13 that controls the overall operation (not shown in FIG. 3), and an operation switch section 3 that includes a plurality of various switches, lamps, etc. for operation.
It has a scanning circuit section 12 for supplying various operation signals from the operation switch section 3 to a control circuit section 13 and for operating a lamp or the like based on signals from the control circuit section 13.

The communication processing circuit section 9 has terminals T1. A telephone line is connected to the direct coupling part 6 via T2, and the network is connected to the direct coupling part 6. An Iil+ control unit 21 and a telephone 22 are connected. Is the network control unit 21 real? Starting and restoring operations for the telephone exchange to which the fax machine is connected, sending selection signals, detecting ringing signals, protecting network facilities, switching to facsimile, handset 2 of telephone 22
The network control unit 21 is connected to a hybrid circuit 15 via a switch 14. The switching device 14 is a device that clarifies the boundary between the telephone line side and the facsimile machine side, which is a terminal device thereof, and disconnects the telephone line from the facsimile machine.

As described above, the communication processing circuit section 9 in FIG. The modulation section 19J3 and the demodulation section 2 are pulled inwards.
0, the reading processing circuit section 10 is connected to the input of the output signal generator 16 via the modulating section 19, and the recording processing circuit section 11 is connected to the demodulating section 20 via the -c self 1)) 17 control circuit (AGC) circuit 18, and is further connected to the output of an automatic control (input via the Q control circuit 1B) control circuit 17. The output of the output amplifier 16 and the input of the input amplifier 17 are connected to each other via the hybrid circuit 15.
) is connected to the distribution switch 14, and this hybrid circuit 1
5, the image signal from the reading processing circuit section 10 is supplied to the telephone line, and the image signal from the telephone (i21 line) is supplied to the recording processing circuit section 11.

Further, a telephone 22 is connected to the direct coupling unit 6 via the network control unit 21 and then again via the direct coupling unit 6, and the handset 23 of the telephone 22 is connected to the acoustic coupler 24.
This acoustic coupler 24 is connected to an output amplifier 16 and an input amplifier 17 via an acoustic coupling section 7. More specifically, the handset 23-1 of the handset 23 is connected to the acoustic coupler 2.
The transmitter 23-2 of the handset 23 is closely and acoustically coupled to the speaker 24-2 of the acoustic coupler 24.

The output amplifier 16 and the input amplifier 17 act as an 11η width amplifier when performing direct coupling type facsimile communication which is directly coupled to the telephone line via the hybrid circuit 15, the switching device 14, and the direct coupling unit 6, and It also acts as an amplifier when performing acoustic coupling type facsimile communication which is acoustically coupled to the telephone line via the blind V1 coupling section 7, the acoustic coupler 24, and the handset 23 of the telephone set 22. Since the signal levels and the like are quite different between the two coupling methods depending on the coupling form, it is necessary to change the amplification factors of the amplifiers 16 and 17 according to each coupling method in order to apply it to both methods. Normally, when performing facsimile communication using the direct coupling type, after calling the other party's device, the facsimile communication is performed in an on-footer state where the handset 23 of the telephone 22 is connected to the telephone 22, and when performing facsimile communication using the acoustic coupling type, the telephone Since the handset 23 of the telephone 22 is removed and facsimile communication is performed in an off-footer state where it is set in the uW coupler 24, if the on-hook and off-footer states of the handset 23 of the telephone 22 are detected, it is either a direct coupling type or an acoustic coupling type. It is determined which method is used for facsimile communication. Therefore, in this embodiment, as described above, the network control unit 21 detects the on-hook or off-hook state of the handset 23 of the telephone 22, and the output amplifier 16a3 is output from the network control unit 21 according to the detected off-hook or off-hook state. Economy is achieved by varying the amplification factors of the input amplifier 16 and the input amplifier 17, and configuring the amplifiers 16 and 17 as a dual-purpose type so that they can be used in both systems. In other words, when an on-hook state is detected, the amplification factor of the amplifiers 16 and 17 is set to the first amplification factor, and when an off-hook state is detected, since direct coupling type facsimile communication is to be performed. is for acoustic coupling type facsimile communication, so the amplifier 1
The amplification factor of 6.17 is set as the second amplification factor.

Next, the effect will be explained.

First, the case of direct connection type facsimile communication will be explained. First, the handset 23 of the telephone 4122 is off-hook and the other party's facsimile machine is called by dialing automatically or manually, and after confirmation, the document 4 or reception paper 5 is set, and then the facsimile machine is activated.

When the facsimile machine is activated, the telephone 22 enters the on-knock state. This on-hook state is detected by the network flirt control section 21, and the network control section 21 switches the telephone line from the telephone side to the facsimile machine side. At the same time, the network control unit 21 sets the amplification factors of the output amplifier 16J3 and the input amplifier 17 to the first amplification factor for direct coupled facsimile communication in accordance with the detected on-hook state. When the amplification factors of the amplifiers 16 and 17 are set to the first amplification factor in this way, the telephone line is connected to the direct coupling section 6, the network control section 21, the switching device 14, and the hybrid circuit 15.
Directly coupled facsimile communication is performed via the .

In this case, the image signal of the document 4 read by the reading processing circuit section 10 is modulated by the modulation section 19, and
6, the signal is amplified by a first amplification factor, and transmitted to the telephone line via the hybrid circuit 15, switch 14, network control section 21, and direct coupling section 6, and then transmitted to the other party's facsimile machine. Further, the image signal from the other party's facsimile device is transmitted from the telephone line to the direct connection section 6, the network control section 21, the switching device 14,
It is supplied to the input amplifier 17 via the hybrid circuit 15, is amplified by the first amplification factor at the input amplifier 17, and is controlled by the automatic gain control circuit 18,
The signal is demodulated by the demodulation section 20, supplied to the recording processing circuit section 11, and recorded on the receiving sheet 5.

Next, the case of facsimile communication using the Hatake YI combination type will be explained. In this case as well, the handset 2 of the telephone 22
3 off-hook, dial automatically or manually to call the other party's facsimile machine, set the confirmed document 4 or received paper 5, and then start up the facsimile machine.

Even if the facsimile machine is activated, in this case, the telephone 22 remains in the off-hook state, so the network control unit 21 detects this off-hook state, and adjusts the amplification factors of the output amplifier 16 and input amplifier 17 accordingly. is set as the second amplification factor for acoustic coupling type facsimile communication.

When the second amplification factor is set in this way, the telephone line is connected to the direct coupling unit 6, the telephone 122, the handset 23,
Acoustic coupling type facsimile communication is performed via the acoustic coupling section 24 and the acoustic coupling section 7.

In this case, the image signal of the rough stone 4 read by the reading processing circuit section 10 is modulated by the modulation section 1, and the image signal of the raw stone 4 is modulated by the output amplifier 1.
6, the acoustic coupling unit 7 is amplified with a second amplification factor.
is supplied from the speaker 24-2 of the acoustic coupler 24 to the transmitter 23-2 of the handset 23, transmitted to the telephone line via the telephone 22 and the direct coupling section 6, and transmitted to the other party's facsimile device. . Further, the image signal from the other party's facsimile device is transferred from the telephone line to the direct connection unit 6 and the handset 23.
is supplied to the microphone 24-1 of the g-acoustic coupler 24 via the receiver 23-1 of
The signal is then set to 1!:1 by the automatic rate control circuit 18, demodulated by the demodulator 20, supplied to the recording processing circuit 11, and recorded on the receiving sheet 5.

FIG. 4 is a block diagram showing a communication processing circuit section of a facsimile machine according to another embodiment of the invention. This fruit, I
71! The communication processing circuit unit 45 in the communication processing circuit unit 9 of FIG. and an input amplifier 17b for direct coupling, and these amplifiers are switched by changeover switches 31 and 33, and the output amplifier 16a for rectangular coupling and the input amplifier 17a for direct coupling
The output amplifier 16b for joint venture coupling and the input amplifier 17b for direct coupling are fixed at the second amplification factor, and the limb operation of the selector switches 31 and 33 is controlled by the control circuit section 1.
The main difference is that the q control circuit 18 is removed, and the configuration and operation of the q control circuit 18 are the same.

[Effect of the Invention J As explained above, according to the present invention, when on-hook of a telephone is detected and image signals are transmitted and received via a direct connection, the amplification factor of the amplification means is set to the first amplification factor. the amplification means according to the facsimile communication method. Since the amplification factor is appropriately variable, it is possible to economically construct an integrated facsimile machine with both direct coupling type and acoustic coupling type functions, and when set to acoustic coupling type, It is easy to move and can be installed and used in any location, and when set to a direct connection type, it can be used stably with excellent data transmission.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a communication processing circuit used in a facsimile device according to an embodiment of the present invention, FIG. 2 is a perspective view of the overall external configuration of the facsimile device, and FIG. 3 is a perspective view of the facsimile device. FIG. 4 is a block diagram of a communication processing circuit section of a 77-nox machine according to another embodiment of the present invention. 6... Direct coupling part 7... Acoustic coupling part 15.
...Hybrid circuit 1G...Output amplifier 17...Input amplifier 22
...Telephone 23...Handset 24...
Acoustic coupler agent/Jffi±3 Yoshiyasuo Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a facsimile device that performs facsimile communication via a telephone line, a direct connection part that is directly connected to the telephone line;
an acoustic coupling unit acoustically coupled to the telephone line via the handset of the telephone; amplifying means for amplifying the modulated image signal for transmission to the telephone line and for amplifying the modulated image signal received from the telephone line; a detection means for detecting on-hook and off-hook of a telephone connected to a telephone line, and when the detection means detects on-hook and transmits and receives an image signal via the direct connection part, the amplification factor of the amplification means is set to a first amplification factor control means for setting the amplification factor of the amplification means to a second amplification factor when the detection means detects off-hook and transmits and receives an image signal via the acoustic coupling section; A facsimile device comprising: