JPH03184465A - Image communication equipment - Google Patents

Abstract

PURPOSE:To enable communication to various facsimile equipments without fail by providing an operation input means to determine whether a signal to identify a station to be called regulated by a CCITT recommendation T30 is transmitted or not in the case of picture reception. CONSTITUTION:In the case of polling reception from the station of a called party, to which a call is automatically incoming, by a manual operation, an operator dials a prescribed number after hearing a dial tone. When the CED signal of the station to be called can be recognized within prescribed time, the start key of an operation input part 7 is pushed down after turning OFF a CED transmission switch 7a of the operation input part 7 and the facsimile equipment is connected to a communication line. When executing the picture reception, it can be controlled by the CED transmission switch 7a whether a user transmits a CED signal or not. Therefore, when the facsimile equipment of a G2/G3 dual mode is the terminal of the station to be called, facsimile communication can be securely executed without generating a problem not to execute the picture reception, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to an image communication device, and particularly to an image communication device that performs image communication using call control in accordance with CCITT Recommendation T30.

[Prior Art] In a conventional facsimile device, in the case of manual reception at the called station, the CCITT Recommendation T as shown in Fig.
It is designed to operate according to the recommended flowchart of No. 30.

Figures 4 (A) and (B) show how to operate the calling station and called station using the manual procedure, respectively, and Figures 4 (C) and (D) show how the 5 calling stations operate using the automatic procedure and the called station. This shows the operation method when the station is in manual procedure. In either case, as indicated by the dashed line step 5101 in FIGS.
It is now possible to transmit a D signal (tonal called station identification signal).

If the calling station is manual, as shown in FIG. 4(A), the voice communication is performed in step 5102 (the called station performs voice communication in step 5103' of FIG. 4(B) after step 5L02N in FIG. 4(B)). CHD transmitted in step 5lot after transmission line switching
After confirming the audio of the signal, the first calling station operator switches the transmission path to the facsimile machine side in step 5103 by operating a switch or the like.

If the calling station is automatic and the called station is manual, when the called station operator listens to the CNG signal in step 5IO4 of FIG. The transmission path is switched to the facsimile machine side, and as a result, the CHD signal is transmitted in step 5IOI.

On the calling side, the facsimile procedure is started by detecting a facsimile signal in step 5106, but normally the optional CHD is not detected here, and the facsimile procedure is started by detecting a DIS signal or the like.

[Problem to be Solved by the Invention 1] However, this Recommendation T30 does not include the case where the image receiving station manually makes a call and then sends a digital transmission command (DTC) signal to the called station to perform polling reception. is not clearly described, so in conventional facsimile machines, in the case of manual polling reception from the calling station, the calling station, which is the image receiving side, follows the procedure according to the flowcharts in Figures 4 (B) and (D). It was working according to.

That is, in conventional facsimile machines, the CHD signal, which is an optional signal, is output.

The handling is the same for either image reception or polling reception, and devices designed to send CHD signals always use CHD before entering phase B during manual reception.
Devices designed to transmit HD signals but not CHD signals do not always transmit CHD signals during manual reception.

However, if the CHD signal is sent out in the same way in the @ party's device, that is, in the case of reception after an incoming call by manual operation and in the case of polling reception by manual call origination, the following problems occur.

That is, according to Recommendation T30, C as a tonal signal
The HD signal standards are: CHD signal: 2100Hz+15Hz for 2.6 seconds or more4
．． 0 seconds or less This standard is a standard for Group 2 commands, Group 2 command (GC2) signal: 2100 Hz + 1 OHZ 1.5 seconds or more and 10 seconds or less, so there is overlap in the frequency domain and time domain.

Therefore, when performing a polling reception operation with manual call origination, when the calling side receiver sends a CHD signal, if the called station uses automatic reception and is a G2/G3 dual mode facsimile terminal, the called station There were cases in which the terminal misidentified the CED signal as a GC2 signal and shifted to G2 mode reception, making polling reception impossible.

In addition, the latter device described above, that is, a device that does not transmit a CHD signal in both the case of reception after a call is received by manual operation and the polling reception by one manual call, has the following drawbacks.

In other words, some existing devices have CH
There are some transmitters that do not proceed to the transmission procedure unless they detect the D signal, but if this type of transmitter is on the calling side, reception will not be possible.

An object of the present invention is to solve the above problems.

[Means for solving the problems] In order to solve the above problems, in the present invention, CC
An operation input for determining whether or not to transmit a called station identification signal specified in Recommendation T30 when receiving an image in an image communication device that performs image communication using call control based on ITT Recommendation T3 Recommendation A30. A structure with means was adopted.

[Operation 1] According to the above configuration, it is possible to select whether or not to transmit the called station identification signal depending on the image reception control procedure to be executed.

[Embodiment J] Hereinafter, one of the present invention will be described in detail based on an embodiment shown in the drawings.

FIG. 1 is a block diagram showing the basic configuration of a facsimile machine employing the present invention.

In the figure, the reference numeral l is the main control unit that controls the operation of the entire device, and it is composed of a microprocessor, etc., and has a ROM
1a and RAM 1b are connected. ROM1a has C
The PUI control program is stored, and RAM1b is the CP
Used as U1's work area.

Reference numeral 2 denotes a reading section comprised of a CCD image sensor, document transport mechanism, etc., and reference numeral 3 represents a recording section comprised of a thermal printer, laser beam printer, etc., which respectively constitute an image reader and an output part for the apparatus.

Reference numeral 4 is a communication control unit consisting of a modem, NCU, etc., reference numeral 5 is a telephone for manual call control and telephone calls, and reference numeral 6 is a communication line ls (telephone line), main control unit l, telephone 5, communication Line connection control between the lines 6 is performed by the communication control unit 4.

Reference numeral 7 is an operation input section consisting of a keyboard and the like.

Reference numeral 8 denotes a display section composed of an LCD, etc., and an operation input section 71. The display section 8 constitutes a user interface means.6 In this embodiment, the operation input section 7 is provided with a CED output switch 7a. , the function for controlling whether or not to transmit a CHD signal will be described later.

The above hardware configuration is almost the same as the conventional device except for the CED output switch 7a of the operation input section 7.

Next, the operation of the above configuration will be explained with reference to the flowchart shown in FIG. Fig. 2 shows a control procedure for manual image reception (normal reception and polling reception on the called side) in the apparatus shown in Fig. 1. The illustrated procedure is controlled by the main controller l. It is stored in the ROM 1a as a program.

In FIG. 2, steps 511-330 are controls related to operations by the operator, and steps 531-332 are controls related to operations inside the facsimile machine.

When the user confirms that there is a call, the user picks up the receiver and answers in step S12.

Further, in steps S13 and S14, a CNG signal is detected within a predetermined time, and if the signal cannot be recognized, the process proceeds to step S15 and the line is cut off.

If a CNG signal is detected, the process moves to step S16 and the CHD output switch 7a provided in the operation input section 7 is activated.
is turned on, the process proceeds to step S30, and the operation input section 7 is turned on.
The facsimile device is connected to the communication line by pressing a start key (also not shown) provided on the . This passage switching is performed by the communication control section 4.

On the other hand, when polling reception is performed manually from a partner station for automatic call reception, the flow on the right side of the diagram is executed. Here, the device becomes a calling device.

First, the operator asks for a dial tone in step 521, and then dials a desired number in step S22.

Next, in steps S23 and S24, the process waits for a predetermined time until a ring (back) tone is heard.

If the ring (back) tone is not heard within the predetermined time, the telephone is hung up and polling reception is abandoned in step S25. When the ring (back) tone is heard, the operator proceeds to steps S26 and S27 and waits for a predetermined period of time to receive a CHD signal from the other station, that is, the called party.

If the operator cannot recognize the CHD signal within the predetermined time (including when a busy tone is being transmitted), the process proceeds to step S29, hangs up the phone, and abandons polling reception.

If the CHD signal of the called station can be recognized within the predetermined time in step S26, the process moves to step 328, where the CED sending switch 7a of the operation input section 7 is turned off. Press the start key to connect the facsimile device to the communication line.

After opening the connection, in step S31, a CNG signal or a 1300 Hz signal in the case of a 16 Hz contract for a facsimile communication network (F network) is detected. If these signals are detected, there is no possibility that the other station's terminal will misidentify them as GC2 signals, so step S is performed regardless of the CED transmission/transmission twitch state.
Proceed to step 33.

If step S31 is negative, step S32
The state of the CED sending switch 7a is determined, and if the switch is on, the CHD signal is sent out in step S33, and if the switch is off, step S32 is skipped and the CHD signal is not sent out. In step S34, the process advances to phase B, where the reception operation begins.

In step S33, a CHD signal is transmitted.

According to the above configuration, when performing image reception, the CED sending switch 7a determines whether the user sends the CE input signal or not. Since it is possible to lj, G2 is used like a subtitle.
/If a G3 dual mode facsimile device is the called station terminal, the device will misidentify the CEDE signal as a GC2 signal and switch to G2 mode transmission, making it impossible to perform polling reception or detecting a CHD signal. Facsimile communication can be reliably performed without causing problems such as inability to receive images when the calling terminal is an essential condition for changing the transmission procedure.

In the above embodiment, the operation is exactly the same for reception as the called station or reception after a call, and for polling reception by calling an automatic reception station (pick up the handset and press the start key). Because I try to do
Although the control procedure shown in the figure is adopted, polling reception may be activated by a key operation different from the start key used in normal reception, as shown in FIG. In this case, the operation input unit 7 is provided with a polling key (not shown) for specifying the start of polling.

The procedure in FIG. 3 shows the communication procedure in the case of polling reception, which continues from the upper right to the lower part of FIG.

Control from steps 521 to 529 in FIG.

The operation is the same as in FIG. 2, but the operator performs step S26.
When the CHD signal of the other station is recognized, step 830'
, press the polling key to switch the transmission path to the facsimile machine side.

Thereafter, without sending the CEDE signal, step 54
At 1.542, the DIS (digital identification) signal of the other station is detected for a predetermined time (Tl), and if the same signal is detected, polling processing is performed thereafter.

When using the procedure in Figure 3, in the case of an incoming call, the CE
By transmitting the DE signal, that is, in the procedure shown in FIG. 2, by performing processing in which the CED sending switch 7a is always turned on in step S16, troublesome operations are not required and the same effects as in the embodiment shown in FIG. 2 can be obtained. You can expect.

[Effect of the invention J As is clear from the above, according to the present invention, CCITT
Recommendation T3 A fabrication that determines whether or not to transmit the called station identification signal specified in Recommendation T30 when receiving one image in an image communication device that performs image communication using call control based on Recommendation A30. Since the system is equipped with an input means, it is possible to select whether or not to transmit a called station identification signal depending on the image reception control procedure to be executed, and it is possible to reliably communicate with various facsimile terminals. There is an excellent effect of 6

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a facsimile device adopting the present invention, FIG. 2 is a flowchart showing the image reception control procedure in the device of FIG. 1, and FIG. 3 is a polling diagram according to another embodiment of the present invention. FIGS. 4(A) to 4(D) are flowcharts showing the procedure for sending a facsimile W-11r based on the CCITT recommendation T3 recommendation A30.

Claims (1)

[Claims] 1) In an image communication device that performs image communication using call control in accordance with CCITT Recommendation T30, whether a called station identification signal specified in Recommendation T30 is transmitted when receiving an image. An image communication device characterized by comprising an operation input means for determining whether or not the image is transmitted. 2) When the operation input means is operated so as not to transmit the called station identification signal and detects a predetermined signal indicating that the other station is a non-voice terminal, the operation input means transmits the called station identification signal. The image communication device according to claim 1, wherein the image communication device transmits an image.