JPS5986366A - Facsimile device - Google Patents

Abstract

PURPOSE:To grasp the propriety of a line at a glance by discriminating correctness of a test data received at a receiver and integrating separately the number of received total bits and the number of error bits and displaying the result. CONSTITUTION:After a transmission bit rate is set by a dip switch 9 at the transmission side, whether or not a discriminating signal 14 for a station to be called is discriminated and when it is received, a transmission button 10 is depressed. Further, the transmitter transmits a digital instruction 15 after waiting for a time regarded that the signal 14 from the receiver is finished. This instruction 15 includes the information of data transmission bit rate for line test. Further, the receiver discriminates whether or not the digital instruction is received and when it is received, the bit rate information for data receiving included in the digital instruction signal is read out and the number of received total bits and the number of error bits are integrated separately and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a facsimile machine, and more particularly to a facsimile machine capable of determining whether the line condition is good or bad.

BACKGROUND OF THE INVENTION In general, facsimile apparatuses have no choice but to actually send and receive images in order to determine the state of the line that the apparatus is using.

Therefore, after the image transmission and reception are completed, it becomes clear that the line condition is poor, and the image transmission and reception must be performed again.
It was a waste of effort and time.

OBJECTS The present invention has been made in order to eliminate the above-mentioned conventional drawbacks, and an object of the present invention is to provide a facsimile device configured so that the quality of the line condition can be grasped at a glance.

In order to achieve the above object, the present invention transmits test data having a certain number of bits between facsimile machines, determines whether the received data is correct or not, and calculates the total number of received bits and the number of error bits. We have adopted a configuration that integrates these separately and displays them.

Embodiment Hereinafter, details of an embodiment of the present invention will be explained with reference to the drawings.

FIG. 1 shows the schematic configuration of a 03 facsimile conforming to the T4 recommendation of the CCITT (Consultative Committee for International Telegraph and Telephone) to which the present invention is applied.

In FIG. 1, the symbol 1 is the line control circuit, and 2 is the CCITT (7) V 27 ter , V 29
The high-speed modem specified by T and 3 indicate the low-speed modem also specified by v21, both of which are connected to a line control circuit 1 and a control unit 4 that controls the entire system.

The control unit 4 is operated by the operation unit 5. A document reading section 6 and an image recording section 7 are connected to the control section 4 .

On the other hand, FIG. 2 shows details of the operation panel of the operation section 5 shown in FIG. 1.

In Fig. 2, the reference numeral 8 is a high-speed modem/low-speed modem selector switch, and the reference numeral 9 is a D for setting the number of test bits.
IR switch, the one indicated by the symbol lO is the send button, 11
12 is a receive button, 12 is a stop button, and 13 is a test switch.

On the other hand, FIG. 3 shows a line test procedure when a high-speed modem is used.

First, when the transmit button is pressed on the transmitter side, if the receive button is pressed on the receiver side, the called station identification signal (CED) is sent.
14 occurs.

After that, on the transmitter side, a digital command signal ('DO3
) 15 is generated, and in response to this, a reception readiness confirmation signal (CFR) 1B is generated on the receiver side. After this, you will be in a training state.

On the other hand, Figure 4 explains the line test procedure when using a low-speed modem.If the send button on the transmitter side is pressed and the receive button on the receiver side is pressed and the receiving modem is Station identification signal (CED) 1? occurs.

Then, the transmitter side enters a preamble state.

Note that all of the above-mentioned signals comply with CQITT Recommendation T3 Recommendation Type 30.

Next, the actual line test will be explained using flowcharts of operations when using a high-speed modem and when using a low-speed modem shown in FIGS. 5 and 6.

First, a case where the high-speed modem 2 is used will be explained.

First, turn on the test switch 13 of both the transmitter and receiver, turn the high-speed/low-speed modem changeover switch 8 to the high-speed modem side, that is, to the V27ter/V2!3 side in FIG. 2, and set the test information to be received by the DIIP switch 9. The total number of bits is set (Step S). After capturing the line to be tested, the receiver presses the receive button 11 (step R1) and receives the called station identification signal 1.
4 (step R2).

On the transmitter side, after setting the transmission bit rate with the DIR switch 9, it is determined whether or not the called station identification signal 14 has been received (step s2), and the transmit button 10 is pressed (step S3).

After pressing the transmit button 1o, the transmitter waits for a time period during which the called station identification signal 14 from the receiver will be completed, and then transmits the digital command signal 15 (step S4).

This digital command signal 15 includes information on the transmitter's line test data transmission bit rate.

The receiver determines whether or not a digital command has been received in step R3, and if so, reads out the data reception pin and trade information contained in this digital command signal in step R4. , the reception bit rate is set, and the recording unit 7 prints the bit rate.

Note that if it is determined in step R3 that the digital command signal 15 has not been received, a reception error occurs and the routine ends. Subsequently, in step R5, the receiver transmits a reception preparation confirmation signal 16 to inform the transmitter that preparations for receiving data have been completed.

At this time, the transmitter determines whether or not it has received the reception preparation confirmation signal in step S5, and if it has not received it, an error occurs and the routine ends. If the training signal is being received, a training signal is transmitted in step S6 in order to adjust the modem on the receiver side, and then the "l" signal is continuously transmitted until the stop button 12 is pressed.

After receiving the training signal (step R6), the receiver completes modem adjustment and then begins receiving test data in step R7. Then, in step R8, the counter for the total number of bits received in the memory in the control section 4 is incremented, and if the received data is not "1", the counter for the number of error bits in the memory in the control section 4 is incremented.

As mentioned above, the transmitter is continuously transmitting data of "1", so if there is no error in the line, all the data received by the receiver should be "1". .

If the error pit number counter counts, it can be seen that an error has occurred in the line.

On the other hand, the receiver receives a carrier detect signal from the high-speed modem 2 every time it receives data, and it is determined in step R9 that this carrier detect @ J+CD is continuously at a low level for a certain period of time. It is assumed that the data transmission from the transmitter has ended, and the number of error bits and the total number of received bits are recorded in the recording section 7 in step R10.

Note that if the transmitter transmits the training signal in step S6 and then continuously transmits a signal of "1" in step s7, it is determined in step s8 whether or not the stop button has been pressed, and the transmitter determines whether the stop button has been pressed. If the button is not pressed, the process returns to step S7, and if the button is pressed, the transmission for the line test is completed.

On the other hand, when the low-speed modem 3 is used, the operation is shown in FIG.

That is, after turning on the test switch 13, setting the changeover switch 8 to the V21 side, setting the total number of bits to be received with the DIP switch 9, and capturing the line to be tested, the receiver side performs the reception in step J1. Press the button and proceed to step J2, where the called station identification signal 17
Send.

On the other hand, on the transmitter side, it is determined in step 1 whether or not the called station identification signal 17 has been received, and in step 2, the transmit button is pressed, and the called station identification signal 17 of the receiver is
Wait for the time that the transmission of ``1'' would have been completed and send the preamble to step 3, then proceed to step 4 and send the data ``1'' and ``1'' to step 5.
0" data continues to be sent alternately.

Then, in step 6, it is determined whether or not the stop button has been pressed from the receiver side, and if it has not been pressed, the process returns to step 4. When the stop button is pressed, the line test operation ends.

On the other hand, the receiver side receives a preamble in step J3, receives data in step J4, synchronizes with the data bits using the received preamble,
It is determined that the inverted data of "1" and "O" of the data received immediately before is the correct data at that time.

If the data is incorrect, an error pit number counter on the memory in the control section 4 is incremented, and a received total bit number counter on the memory in the control section 4 is incremented each time data is received.

On the other hand, the receiver constantly receives the carrier detect signal CD from the low-speed modem 3. Then, in step J6, it is determined whether the carrier detect signal CD has been at a low level continuously for a certain period of time, and if it is at a low level, it is assumed that data transmission from the transmitter has ended, and □ reception operation is performed. , and in step J7, the number of error pins and the total number of received bits are printed.

Note that instead of printing the number of error bits and the total number of received bits, a method may be adopted in which a liquid crystal or other display device is provided in the operation section 5 and displayed on this display device.

In addition, if the receiver side is provided with a function to specify the total number of bits to be received, when taking statistics on line error rates, etc., the total number of bits received as a parameter can be arbitrarily set, and more accurate data can be obtained. Obtainable.

Effects As is clear from the above explanation, according to the present invention, the receiver side receives test data having a certain number of bits sent from the transmitter side, determines whether the data is correct, and then receives the data. The total number of bits and the number of error bits are accumulated separately, and both numbers of bits are displayed after communication is completed.
It is possible to accurately measure the error rate of a line without using any special equipment.

[Brief explanation of the drawing]

The figures are for explaining one embodiment of the present invention. Fig. 1 is a block diagram showing the schematic configuration of a facsimile machine, Fig. 2 is a plan view of the operation section, and Fig. 3 is a diagram showing the configuration of a facsimile machine using a high-speed modem. Figure 4 is an explanatory diagram of the line test procedure when a low-speed modem is used. Figure 5 is a flowchart diagram explaining the control operation when a high-speed modem is used.
The figure is a flowchart explaining the control operation when a low-speed modem is used. l...Line control circuit 2...High speed modem 3...
Low-speed modem 4...Control unit 5...Operation unit
6... Original reading section 7... Image recording section 8
...Selector switch also...DIR switch 10
...Send button 11...Receive button 12...
・Stop button 13...Te, stop switch Fig. 5 Fig. 6 35

Claims (1)

[Claims] In a facsimile machine that transmits data between devices, the transmitter side of the facsimile machine transmits test data with a predetermined number of bits, the receiver side determines whether the received data is correct or not, and calculates the total number of received bits. A facsimile machine characterized by separately adding up the number of error bits and displaying the total number of received bits and the number of error bits after communication is completed.