JPS61230565A - Data communication equipment - Google Patents

Abstract

PURPOSE:To easily set an equipment in a calling station that is operated as an automatic transmission mode to a telephone calling mode by providing a signal level detecting means which detects the signal level of a signal that is appeared at the passing frequency band area of a telephone line. CONSTITUTION:The equipment such as a facsimile, etc. started up by the transmission of a designated time of day, etc. is started an automatic transmission with acquiring a required telephone line 7 and calls a called station by sending the selecting signal of a transmission objected station and also measured a waiting time. At the next, a signal level detecting part 6 discriminates whether any signal is detected or not with a regulated signal level or more. As a result, when the signal received from the called station is the one other than a procedured signal, a telephone calling from the called station is informed to an operator by a buzzer or a display, such as an LED, etc. Thus, by providing the detecting part 6, the called station, even in case without equipping with the equipment, such as the facsimile, etc. can call the operator using the equipment of the calling station operating in the automatic transmission mode by returning voice, etc. and set the telephone calling mode.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a data communication device that communicates image data, text code data, etc., and has an auto-dial function that automatically sends a called station selection signal to a communication line. .

[Prior art]

For example, in a facsimile machine having this type of auto-dial function, initial identification using a calling procedure at the time of starting automatic transmission has conventionally been performed as follows.

That is, the outline of the automatic transmission start procedure in a CCITT standard facsimile machine is as shown in the flowchart shown in FIG. to acquire the required telephone line.

Next, in step S2, a transmission target station selection signal is sent to call the called station, and subsequently, in step S3,
In accordance with the T30 procedure of the CCITT standard, a timer counter Tl is started to measure a waiting time T1 of 30 to 40 seconds.

Next, in step S4, a ring tone (CNG) indicating that the call is made by automatic transmission from the facsimile machine is displayed.
Send a signal. Subsequently, in step S5, a procedure signal is received at the called station, and therefore it is determined whether the received procedure signal is returned from the called station, and when the procedure signal is returned, the procedure of the transmission operation is continued. . the other 1
If the procedural code is not returned, the process proceeds to step S8, where the operations in steps S4 to S8 of 0 or more are performed to check whether or not the time measured by the T1 timer has elapsed.
Repeat until one timer finishes counting.

Generally, the procedure signal in the 03 standard facsimile machine of 0017 is on the digital identification (019) signal, and in the G2 standard, the procedure signal is on the group identification (GI2) signal.
It's a signal.

The process of steps S4 to S8 is repeated, and if a procedure signal is returned from the called station before the TI timer finishes counting, the process proceeds directly to the transmission operation in step S5, but the waiting time T1 If the procedure signal cannot be received after the elapsed time, the process moves to step S7 and the LCD and LED
Either display an error using a display device such as the above or a buzzer, or, in step S8, open the telephone line without displaying an error to complete the series of operations, temporarily stop automatic transmission, and repeat the above-mentioned procedure again. Repeat the automatic transmission start operation.

Therefore, conventionally, even when the called station is a communication device other than a facsimile machine and the calling station wants to notify the calling station, the calling station simply repeats the automatic transmission start operation described above. However, there was a drawback in that it was not possible for the called station to call the operator of the calling station and tell him, for example, that repeating the automatic transmission operation was invalid.

〔the purpose〕

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the above-mentioned conventional drawbacks, and to provide a system in which when a calling station of a data communication device having an auto-dial function starts an automatic transmission operation, a called station transmits the automatic transmission to the calling station. It is an object of the present invention to provide a data communication device that allows a called station to call an operator of a calling station when the called station wants to make a call.

[Structure of the invention]

゛In order to achieve such an object, the data communication device of the present invention includes a sending means for automatically sending a called station selection signal to a communication line, a detection means for detecting a signal level of the communication line, and a detection means for detecting a signal level of the communication line. The detected signal is returned from the called station in response to the call originating from the sending means.
lZ) A determining means for determining whether or not it is an fφ procedure signal, and an output means for generating a telephone call output when the determining means determines that the signal detected by the detecting means is not a procedure signal. .

〔Example〕

In the following, the invention will be described in detail by way of example embodiments with reference to the drawings.

FIG. 1 shows an embodiment of the configuration of a data communication device according to the present invention, and this data communication device includes a sending means 101 that automatically sends a selection signal for selecting a called station 20G to a communication line 100. and a detection means 102 for detecting the signal level of the communication line 100. The signal detected by this detection means 102 is a facsimile procedure signal returned from the called station 200 in response to the call originating from the sending means 101. The apparatus is provided with a discriminating means 103 for discriminating whether or not there is a facsimile procedure signal, and an output means 104 for generating a telephone call output when the discriminating means 103 discriminates that the signal detected by the detecting means 102 is not a facsimile procedure signal.

Next, as an example of the data communication device of the present invention, an embodiment of the configuration when applied to a facsimile device is shown in FIG. 2. In the configuration shown in FIG. 2.
is a recording section consisting of a recording head, a recording paper conveyance motor, and the like. 3 is a system control unit consisting of a microcomputer, a storage circuit, etc.;
A modem (modulation/demodulation) section 4 and a network control section (NCU) 5 are connected to the facsimile machine to control the operations of each section of the facsimile machine. That is, the reading of the transmission document is performed by the system control unit 3.
The system control section 3 controls the recording section 2 to record the received image.

A network control unit (800) 5 is connected to the telephone line 7, performs automatic call reception operation by normal ring detection and line control operation, and modulation/demodulation of carrier signals sent and received via the telephone line 7 is carried out by the network control unit (NCU). ) 5, the modem section 4 is configured to be able to detect tonal signals based on oscillation sounds and binary signals based on double codes as described in the 730 procedure of the CCITT standard.

On the other hand, the network control unit (NCU) 5 includes, in addition to the modem unit 4,
It is also connected to a signal level detection section 6 configured to detect the signal level of a signal appearing in the pass frequency band of the telephone line 7, and transmits to the system control section 3 whether or not a signal is detected for the telephone line 7. Note that this system control unit 3
The control operation is performed by the operator using the operating section 9, and the control status is displayed on the display section 8.

FIG. 3 shows a flowchart of an example of a control procedure in the system control section 3 that controls each section as described above.

In the flowchart shown in Figure 3, the facsimile machine activated by a specified time transmission, one-touch transmission, etc. starts automatic transmission, first acquires the required telephone line in step Sll, and then acquires the transmission target in step S12. A station selection signal is sent, the called station is called, and then, in step S13, the CCITT standard ? Follow 30 steps, 3
A timer counter T1 is started to measure a waiting time T1 of 0 to 40 seconds.

Next, in step S14, a ring tone (CNG) indicating that the call is made by automatic transmission from the facsimile
) send out a signal. Subsequently, in step S15, it is determined whether the signal level detection unit 6 has been able to detect any signal from the called station at a signal level above a certain level.

Next, in step S18, it is checked whether the time Tl measured by the T1 timer has elapsed. Step 914~S1
Repeat step 8 until the T1 timer finishes counting.

At that time, if any signal is detected before the T1 timer ends, the process moves to step S19,
determining whether the detected signal is a returned procedure signal received from the called station; as a result of the determination, it is determined that the detected signal is a returned procedure signal from the called station; If so, continue normal transmission operations. On the other hand, if it is determined that the signal received from the called station is a signal other than the above-mentioned procedure signal, an error display is displayed by an output device such as a buzzer, LED, or LCD, and the telephone call from the called station is interrupted. Inform the operator of what is being done.

On the other hand, if it is not possible to detect a signal above a certain level before the TI timer finishes counting, the process proceeds to step S17 as in the past and displays an error message using an LED, LCD, buzzer, etc. or,
The telephone line is opened in step S18 without displaying an error message, and the series of operations ends.

Unlike the conventional device, this embodiment is equipped with a signal level detection circuit 6, so even if the called station is not equipped with a facsimile machine, the called station can return voice or press the button. If it is a telephone, by returning a signal of a certain level or higher other than a procedure signal such as pressing a button, it is possible to call an operator using a facsimile machine operating in the calling station's automatic transmission start mode. .

Note that in the example of the control procedure described above, the configuration of the circuit that confirms the arrival of the call to the called station in response to the selection signal transmission is not shown, but the network control unit (N
By providing a circuit for detecting the polarity reversal of the signal on the telephone line in CU) 5, the polarity reversal detection circuit detects the polarity reversal of the calling signal when it arrives at the called station and confirms the incoming call. By executing the above-mentioned control procedure after this confirmation, it becomes possible to avoid unnecessary operator calls based on signal detection by the above-mentioned signal level detection circuit when the called station is talking.

Although the present invention has been described in the above-described embodiments by taking as an example a facsimile device that communicates image data, it goes without saying that the present invention can be effectively applied to other data communication devices that communicate data such as text code data.

〔effect〕

As is clear from the above description, according to the present invention, by using a relatively simple configuration in which a signal level detection means is provided in a conventional device, a device of a calling station in automatic transmission mode can be detected from a called station. A special effect can be obtained in that the telephone call mode can be set relatively easily by an acoustic signal such as a voice.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the configuration of a data communication device according to the present invention, FIG. 2 is a block diagram showing an embodiment of the configuration of a facsimile machine as an example of the present invention, and FIG. 2 is a flowchart showing an example of a control procedure for an automatic transmission operation of the facsimile machine shown in FIG. 4, and FIG. 4 is a flowchart showing an aspect of the automatic transmission operation of a conventional facsimile machine. l...Reading unit, 2...Recording unit, 3...System control unit, 4...Modem unit, 5...Network control unit (NCU), 6...Signal level detection unit, 7 ...Telephone line, 8...Display section. 9...Operation unit. Figure 4

Claims (1)

[Scope of Claims] 1) Sending means for automatically sending a called station selection signal to a communication line; detection means for detecting a signal level of the communication line; and a signal detected by the detection means, determining means for determining whether or not the signal is a procedure signal returned from a called station in response to a call originating from the transmitting means; and the determining means determines that the signal detected by the detecting means is not the procedure signal. 1. A data communication device comprising: an output means for generating an output of a telephone call when a telephone call is received.