JPS5986367A - Facsimile device - Google Patents

Abstract

PURPOSE:To grasp the line state and error rate by transmitting a prescribed data from a transmitter, discriminating the correction of a received data at a receiver, completing the communication when it reaches a prescribed total number of bits, and recording the received total bit number and the error bit number. CONSTITUTION:When a high speed MODEM is used, after a transmission button 10 is depressed at the transmitter and a digital instruction signal 15 including the data transmission bit rate information for line test is transmitted, after a time required for the completion of a discriminating signal 14 for a station to be called from the receiver is waited. On the other hand, the receiver discriminates whether or not the digital instruction is received and when it is received, the data receiving bit rate information included in this instruction is read out and the receiving bit rate is set and printed. The receiver discriminates the correction of the receiving data and when it reaches a prescribed bit number, the communication is finished, the received total bit number and the error bit number are recorded. This is done similarly in case of the low speed MODEM.

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 certain test data from the transmitter side between facsimile machines, prints the correctness of the received data on the receiver side, and records the total number of bits received. The number of error pits is accumulated separately, and when the total number of received bits set in advance on the receiver side is reached, communication is terminated, and the status of the line used can be checked by displaying the total number of received bits and the number of error pits. We adopted a structure that makes it easy to understand.

Example Hereinafter, details of an embodiment of the present invention will be described 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 l indicates a line control circuit, 2 indicates a high-speed modem specified by CCITT's V 27 ter and V 29, and 3 indicates a low-speed modem specified by the same <V21. and is connected to 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 an I/O switch for setting the number of test bits.
IIP switch, code 1O, the rest is the send button, 1
1 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, a called station identification signal (CHD) is sent.
14 occurs.

After that, a digital command signal (DCS) is sent to the transmitter side.
15 is generated, and in response to this, a reception readiness confirmation signal (CFR) 113 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. Called station identification signal (CED), 1? occurs. Then, the transmitter side enters a preamble state.

Note that all of the above-mentioned signals comply with CCITT 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/V29 side in FIG. The total number of bits is set (Step Sl). After acquiring the line to be tested, the receiver presses the receive button 11 (step Rz) and transmits the called station identification signal i4 (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 53).

After pressing the transmit button 10, the transmitter waits for a period of time during which the called station identification signal 14 from the receiver will be completed, and then transmits the digital command signal 15 (step 34). This digital command signal 15 includes: Contains information on the transmitter's data transmission bit rate for line testing.

In step R3, the receiver determines whether or not a digital command has been received, and if it has received the digital command, the receiver determines the bit rate for data reception, which includes ± this digital command signal. In the information reading step R4, the reception bit rate is set, and the bit rate is printed by recording B57.

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. Next, in the receiver 4±step R5, a reception preparation confirmation message is sent to inform the transmitter that the preparation for receiving data is completed.

Issue No. 16.

At this time, the transmitter determines whether or not the reception preparation confirmation signal has been received (in step S5), and if it has not been received, an error occurs and the routine t± ends. If the 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 rlJ signal is continuously transmitted until the stop button 12 is pressed.

After receiving the training signal (step Rs) and completing modem adjustment, the receiver starts receiving line test data (step R7). Then, the total number of received bits counter on the memory in the control unit 4 is incremented (step R8), and the process proceeds to step R9, where it is determined whether or not it has already reached the set value. If it has been reached, step R
, 10, completes the reception operation, and calculates the number of error bits and
The receiver bit number is printed by the recording section 7.

If the received data is not "1", an error bit number counter in the memory of the control unit is incremented.

Since the transmitter is continuously transmitting data "1", if no error occurs in the line, all data received by the receiver should be "1". When the error bit counter counts, it is determined that an error has occurred in the line.

Moreover, the receiver receives the carrier detect signal CD from the high-speed modem 2 every time it receives data, and while the count-up is not completed in step R9, the process proceeds to step R11, and the carrier detect signal is continuously transmitted for a certain period of time. It is determined whether the level is low or not. If it is determined that the level is not low for a certain period of time, the process returns to step R7, and if it is determined that the level is low for a certain period of time, the signal from the transmitter is It is assumed that the data transmission has ended, and the process advances to status tab RLO to end the reception operation and record the number of error pits and the total number of received bits.

In addition, 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. If it is not pressed, the process returns to step S7, and if it is pressed, the line test transmission ends.

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 using the DIP switch 9, and capturing the line to be tested, on the receiver side, in step J1 Press the receive button and proceed to step J2 to receive the called station identification signal 1.
Send 7.

On the other hand, on the transmitter side, it is determined in step Kl' whether or not the called station identification signal 17 has been received, and the transmit button is pressed in step 2, and the called station identification signal 1 of the receiver is
Wait for the time that the transmission of 7 would have been completed, transmit the preamble in step 3, then proceed to step 4, and send the data of "1" and the data of "1" in 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 data "1" received immediately before and the inverted data of rQJ are the correct data at that time. If the data is incorrect, the error bit number counter on the memory in the control unit 4 is incremented, and the receiver increments the received total bit number counter on the memory in the control unit 4 each time it receives data. J5), proceed to step J6.

In step J6, it is determined whether the number of received bits has been counted up to a preset value, and if the number of received bits has been counted up to the set value, the reception operation is completed,
The number of error pits and the total number of received bits are printed (step J7).

On the other hand, the receiver constantly receives the carrier detect signal CD from the low-speed modem 3. If the count value has not reached the set value in step J6, the process proceeds to step J8, where it is determined whether or not the carrier detect signal CD is continuously at a low level for a certain period of time.
If the level is low, it is assumed that the data transmission from the transmitter has finished, and the receiving operation is finished, at step J7.
Prints the number of error bits and total number of received bits.

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 collecting statistics on line error rates, etc., the total number of bits received as a parameter can be set to any value, and more accurate data can be obtained. be able to.

Effects As is clear from the above explanation, according to the present invention, a certain amount of data is transmitted from the transmitter side of a facsimile machine, the receiver side determines whether the received data is correct, and the total number of received bits and errors are determined. The number of bits is accumulated separately, and communication is terminated when the total number of bits set in advance on the receiver side is reached.
Since it uses a method of displaying the total number of received bits and the total number of error bits, it is possible to understand the line status, error rate, etc. at a glance without using any special equipment.

[Brief explanation of the drawing]

The figures explain one embodiment of the present invention. Figure 1 is a block diagram showing the schematic configuration of a facsimile machine, Figure 2 is a plan view of the operation section, and Figure 3 is a line diagram when using a high-speed modem. An explanatory diagram of the test procedure. 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. Figure 6 is an explanatory diagram of the line test procedure when a low-speed modem is used. It is a flowchart figure explaining the control operation when using. 1...Line control circuit? ...High speed modem 3...
Low-speed modem 4...Control unit 5...Operation unit
6... Original reading section 7... Image recording section 8
... Selector switch 9 ... DIR switch 1o
...Send button 11...Receive (g hotan 12)
...Stop button 13...Test switch Fig. 5 Fig. 6

Claims (1)

[Claims] In a facsimile machine that transmits data between devices, a certain amount of data is sent from the transmitter side of the facsimile machine, the receiver side determines whether the received data is correct or not, and the total number of received bits and the number of error pits are separately calculated. The facsimile device is characterized in that the communication is terminated when the total number of bits preset on the receiver side is reached, and the total number of received bits and the number of error pits are displayed.