JPS63104568A - Communication equipment - Google Patents

Abstract

PURPOSE:To prevent the deterioration of a received picture due to the influence of a charging pulse by releasing once a circuit when a transmission from a caller side to a callee side is requested, and executing an ordinary transmission after making the facsimile equipment of the callee side call automatically. CONSTITUTION:A control circuit 35 controls the facsimile equipment A which originates a call at first, and the facsimile equipment B which performs the call at the time that an information is actually transmitted. Namely, after the facsimile equipment A detects in initial identifying signal from the facsimile equipment B, the facsimile equipment A transmits a transmission instructing signal (to instruct, by a CIG signal, the facsimile equipment B to originate a call automatically after releasing once the circuit). The facsimile equipment B, responding to this, transmits an MCF signal, then the facsimile equipment A transmits a DCN signal after receiving the MCF signal, and releases once the circuit. The facsimile equipment B calls automatically a telephone number designated by the transmission instructing signal, and transmits the information to the facsimile equipment A. Thus, the deterioration of the received picture due to the influence of the charging pulse is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a communication device that performs communication via a public line.

[Conventional example]

A conventional communication device system in which communication device A makes a call (manual call or automatic call) to a communication WB and transmits information from communication device B to communication device A is known as polling transmission. In other words, communication device A makes a call to communication device B, and without releasing the line (remaining captured), communication device B transmits information to communication device A. In other words, transmission was performed from the called side to the calling side.

Here, for example, in countries such as West Germany and Switzerland, a charging pulse is generated on the calling side. If the calling party is a transmitter, the image signal (
In particular, charging pulses do not affect the transmission of information because the level (transmission) is high. However, when the calling side is a receiver, the (reception) level of the image signal is low, so it is affected by the billing pulse, and errors occur in the received image (black dots occur in G2 mode, line omissions occur in G3 mode). There was a drawback.

In addition, when information is transmitted from the called side to the calling side, the disadvantage that international full-duplex operation cannot be erroneously retransmitted has been overcome.

〔the purpose〕

The present invention eliminates the above-mentioned conventional drawbacks, prevents deterioration of received images due to the influence of billing pulses, and also enables erroneous retransmission in international full-duplex operation.

(Embodiment) A communication device system according to this embodiment will be explained using a facsimile device system as an example.

First, the outline of the facsimile machine system according to this embodiment will be explained. Communication device A makes a call to communication device B manually or automatically. Further, no information (for example, a manuscript) is set in the communication device A, and information (for example, a manuscript) is set in the communication device B. In other words, consider a case where information is transmitted from communication device B to communication device A.

At this time, communication device A notifies communication device B of the phone number of communication device A. Then, open the line once. Thereafter, communication device B automatically calls communication device A and transmits information.

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a block diagram showing the configuration of the facsimile machine of this embodiment.

In Figure 1, 2 is used to use the telephone network for data communication, etc., so it connects to the terminal of the line and controls the connection of the telephone exchange network, switches to the data communication path, and maintains the loop. Network control unit NCU (Network
Control Unit). Signal line 2a
is a telephone line. The NCU 2 inputs a signal on the signal line 38a, and if the signal level is "o", connects the telephone line to the telephone side, that is, connects the signal line 2a to the signal line 2b. Further, a signal on the signal line 38a is input manually, and if the level of this signal is "1", the telephone line is connected to the facsimile machine side, that is, the signal line 2a is connected to the signal line 2c. Under normal conditions, the telephone line is connected to the telephone side.

4 is a telephone.

6 is a hybrid circuit that separates the transmission system signal and the reception system signal. That is, the transmission signal on the signal line 18a passes through the signal line 2c and is sent out to the telephone line via the NCU 2. Further, a signal sent from the other party passes through the NCU 2, passes through the signal line 2c, and is output to the signal line 6a.

8 is a modulator that performs modulation based on the known CCITT recommendation V21. The modulator 8 inputs the procedure signal on the signal line 38b, performs modulation, and outputs the modulated data on the signal line 8a.

Reference numeral 10 denotes a reading circuit which sequentially reads image signals of one line in the main scanning direction from the transmission document and creates a signal string representing binary values of white and black. It consists of an image sensor such as a COD (charge coupled device) and an optical system.

The white and black binary signal strings are output to the signal line 10a.

Reference numeral 12 denotes a circuit that manually inputs and encodes the binarized data output to the signal line 10a. Encoding (M
H (Modified Huffman) encoding or MR (
The modified read (encoded) data is output to the signal line 12a.

14 is a memory circuit that stores encoded data output to the signal line 12a. The stored encoded data is output to the signal line 14a.

16 is a modulator that performs modulation based on the well-known CCITT recommendation V27ter (differential phase modulation) or V2O (orthogonal modulation). The modulator 16 inputs the signal output to the signal line 38c, and the signal level of the signal line 38c is "
o'', the signal on the signal line 12a is input and modulated, and the modulated data is output on the signal line 16a. Further, when the signal level of the signal line 38c is "1", the modulator 16 inputs the signal of the signal line 14a, performs modulation, and outputs the modulated data to the signal line 16a.

18 inputs the signals of the signal line 8a and the signal line 16a, and outputs the added result to the signal line 18a.

20 is a demodulator that performs demodulation based on the known CCITT recommendation V21. The demodulator 2o manually performs V21 demodulation on the signal on the signal line 6a, and outputs the demodulated data to the signal line 20a.

22 is a demodulator that performs demodulation based on the well-known CCITT recommendation V27ter (differential phase modulation) or V2O (orthogonal modulation). The demodulator 22 manually demodulates the signal on the signal line 6a, and outputs demodulated data to the signal line 22a.

24 is a memory circuit that stores demodulated data output to the signal line 22a. The stored demodulated data is transmitted through the signal line 24
It is output to a.

26 inputs the signal on the signal line 38d manually, inputs the demodulated data output to the signal line 22a when the signal level is "0", and performs decoding (MH (Modified Huffman) decoding or MR (Modified Huffman) decoding). This circuit outputs read/decoded data to the signal line 26a. In addition, 26 is data that is manually decoded (MH (Modified Huffman) decoded or MR (Modified Read) decoded) from the demodulated data that is output to the signal line 24a when the signal level of the signal line 38d is "1". This circuit outputs the signal to the signal line 26a.

28 is a recording circuit which inputs the decoded data (signal on the signal line 26a) and sequentially records white and black signals line by line.

Reference numeral 30 denotes an oscillation circuit which inputs the telephone number outputted to the signal line 38f when a transmission start pulse is generated on the signal line 38e, and outputs a selection signal for that number to the signal line 2b.

32 is an operation section. Alphabet key A
When Z is pressed, the signal is output to the signal line 32a. Also,
When the numbers 0, 69, *, and # are pressed, they are output to the signal line 32b. Furthermore, when the start key or function key is pressed, the signal is output to the signal line 32c.

34 is a circuit that stores the phone number of the device itself.

When a write pulse is generated on the signal line 38g after outputting the telephone number to the signal line 34a, the telephone number 34 stores the telephone number output on the signal line 34a.

Further, when a read pulse is generated on the signal NQ 38h, the telephone number 34 outputs the currently stored telephone number to the signal line 34a.

36 is a circuit that detects whether there is information to be transmitted. The existence of information to be transmitted means that information is set in the memory or a document is set. 36 is a signal line 36a when there is information to be transmitted.
A signal of signal level "1" is output to the signal line 36a, and when there is no information to be transmitted, a signal of signal level "O" is output to the signal line 36a.

Registration of the telephone number of the own machine (storing the telephone number in the own telephone number storage circuit 34) is performed from the operation section 32, but since this is well known, the explanation here will be omitted.

38 is a control circuit that performs the control described below. The control of facsimile device A, which initially makes a call, and the control of facsimile device B, which makes a call when actually transmitting information, will be explained.

First, facsimile machine A manually or automatically calls facsimile family MB.

Since no information (memory information or original document) is set in facsimile A, an initial identification signal is sent. The facsimile device A is facsimile group fi2.
After detecting the initial identification signal (in which information (memory information or manuscript) is set and has the function of making an automatic call) from B, facsimile machine A sends a transmission command signal (transmits the line once). After opening, please call N
The SC signal is used to instruct the facsimile machine B, and the telephone number is sent to the facsimile machine B using the CIG signal. In response, facsimile machine B sends an MCF signal. After receiving the MCF signal, facsimile device A sends out a DCN signal. When the facsimile group WA cannot receive the MCF signal from the facsimile machine B, it sends out a transmission command signal for the maximum initial identification time (35 seconds).

Then, open the line once. Facsimile machine B automatically calls the telephone number specified by the transmission command signal, and transmits information from facsimile machine B to facsimile machine A.

An example of the procedure of this embodiment described above is illustrated in FIG.

FIG. 3 is a flowchart showing the control performed by the control circuit 38 in FIG. 1 when making a call.

In FIG. 3, step S40 represents the beginning.

In step S42, it is determined whether the receiving state is established. If it is in the receiving state, the process advances to step S44.

In step S44, a signal of signal level "1" is output to the signal line 38a to turn on the CML. This connects the line 2a to the facsimile machine.

In step S46, the timer T1 is set to 35 seconds.

In step 548, NSF is connected from the signal line 38b.
/CS I/DIS signal is output to the modulator 8, and the modulated NSF/CSI/DIS signal is sent to the telephone line 2a via the adder circuit 18, the hybrid circuit 6, and the NCU 2.

Since there is no information to be sent here, the PIF of the DIS signal
The 9th bit of is 0.

In step S50, the timer T2 is set to 4.5 seconds (for manual reception) or 3 seconds (for automatic reception).

In step S52, it is determined whether a response has been received.

When the response is received, the process advances to step S82. If no response has been received, step S5
Proceed to step 4.

In step S54, it is determined whether the timer T2 has timed out. When the timer T2 times out, the process advances to step S56. If the timer T2 has not timed out, the process advances to step S52. In this way, in step S54, timer T2 (4.5 second timer)
Steps S52 and S until it is determined that the timer has expired.
54 is repeated.

In step S56, it is determined whether the timer T1 has timed out. If the timer T1 has timed out, the process proceeds to step 358, and after setting CML to 0FFL, the operation ends; if the timer T1 has not timed out, the process proceeds to step 34111M: Return, NSF/C3I
/DIs signal is sent again.

When the response is received in step S52 and the process proceeds to step S62, in step S62, the NSF/C5I/D
It is determined whether an IS signal has been received, and the NSF/C5T/
When the D I S signal is received, the process advances to step S64, and the N
If the SF/CS I/DIS signal is not received, the process advances to step S68 and processing is performed in accordance with the received signal.

When it is determined in step S62 that the NSF/CS I/DIS signal has been received and the process proceeds to step S64, the process proceeds to step S6.
In step 4, it is determined that the 9th bit of the PIF (facsimile information field) of the received DIS signal is 1, that is, whether there is information to be transmitted to the other party's machine. If the 9th bit of the PIF of the received DIS signal is 1, that is, there is information to be sent to the other device, the process advances to step S66, and the 9th bit of the PIF of the received DIS signal is 0, that is, there is information to be sent to the other device. If there is no such information, the process advances to step 568.

In step S66, the F of the received NSF A word is
It is determined whether the 50th point of the IF has the first function, that is, once the line is released, it has the function of making a call to the telephone number specified by the CIG signal. NSF received
If the 50th bit of the FIF of the signal is 1, that is, it has the above-mentioned function, the process advances to step S70, and the received N
If the 50th bit of the PIF of the SF signal is 0, that is, it does not have the above-mentioned function, the process advances to step S68.

In step S70, from the signal line 35b, N S
The c7c r G/[)TC signal is output to the modulator 8, and the modulated NSC/CI G/DTC signal is sent to the adder circuit 18.
, the hybrid circuit 6, and the NCU 2 are sent to the line 2a. Here, the 50th hit of the FIF of the NSC signal is
By setting this to 1, the other party is instructed to open the line and then automatically call the telephone number specified by the CIG signal.

In step S72, the timer T2 is set to 3 seconds.

In step 374=, it is determined whether a response has been received. When a response is received,
Proceed to step S80. If no response has been received, the process advances to step S76.

In step S76, it is determined whether the timer T2 (3 second timer) has timed out. Timer T2
If the timeout has elapsed, the process proceeds to step 378. If the timer T2 has not timed out, step S7
Proceed to step 4.

In step 378, it is determined whether timer T1 has timed out. When the timer T1 times out, the process advances to step S58. If the timer T1 has not timed out, the process advances to step S70.

In step S80, it is determined whether an MCF signal has been received. Upon receiving the MCF signal, step S82
Proceed to. If the MCF signal is not received, step S6
Proceed to step 8.

In step S82, the DCN signal is output from the signal line 38b to the modulator 8, and the modulated DCN signal is passed through the adder circuit 18, the hybrid circuit 6, and the NCU 2 to the line 2.
sent to a.

FIG. 4 is a flowchart showing the control of the control circuit 38 of FIG. 1 when a call is received.

In FIG. 4, step S90 represents the beginning.

In step S92, it is determined whether the called party is in an automatic call receiving state. If it is the called party and the call is automatically received, the process advances to step S94.

In step S94, a signal of signal level "1" is output to the signal line 38a to turn on the CML.

In step S96, it is determined whether there is information to be transmitted (memory information exists or a document is set). If there is no information to send, proceed to step 5.
Proceed to 120. If there is information to send, proceed to step 398.

In step S98, the timer T1 is set to 35 seconds.

° In step 5100, N from the signal line 38 b
Transmit SF/CSI/DIS signals.

Here, the function according to the present invention, that is, when a transmission is requested from the called side to the calling side, the line is opened once, and the facsimile machine of the called side automatically makes a call and performs normal transmission (& function). Therefore, the 50th bit of the FrF of the NSF signal is set to 1. Also, since there is information to be transmitted, the 9th bit of the PIF of the DLS signal is set to 1.

In step 5102, timer T2 is set to 3 seconds.

In step 5104, it is determined whether a response has been received. When a response is received,
Proceed to step 5112.

If no response has been received, step 510
Proceed to step 6.

In step 5106, it is determined whether timer T2 has timed out. When the timer T2 times out, the process advances to step 5108. If the timer T2 has not timed out, the process advances to step 5104.

In step 8108, it is determined whether timer T1 has timed out. When the timer T1 times out, the process proceeds to step 5110. If the timer T1 has not timed out, the process advances to step 5100.

In step S110, a signal of signal level "0" is output to the signal line 38a to turn off the CML.

In step 5112, the NSC/CIG/
It is determined whether a DTC signal has been received. NSC/CI
Upon receiving the G/DTC signal, the process advances to step 5114. If the NSC/CI G/DTC signal is not received, the process proceeds to step 5118.

In step 5114, 5 of the FIF of the NSC signal is
The 0th bit is 1. That is, according to the present invention, it is determined whether the called party should automatically make a call and transmit information. The 50th point of the PIF of the NSC signal is 1.

That is, when the called party automatically makes a call and transmits information according to the present invention, the process advances to step 5116.

The 50th bit of FTP of the NSC signal is O.

That is, if the called party does not automatically make a call and transmit information according to the present invention, the process proceeds to step 5120.

In step 5116, the MC
Send F signal.

In step 8118, it is determined whether a DCN signal has been received. Upon receiving the D CN signal, step 5
Proceed to 110. If the DCN signal has not been received, the process proceeds to step 5120.

Step 5120 represents other IA filling.

In step 5122, it is determined whether the MCF signal was transmitted in step 5116. Step 5
At step 116, if the MCF signal has been transmitted, the process proceeds to step 5126.

If the MCF signal is not being transmitted in step 5116, the process advances to step 5124.

Step 5124 represents an off state.

In step 3126, the telephone number specified in step 5112 (as specified by the CIG signal) is
Automatically send a call to. Specifically, step 5112
After outputting the telephone number specified by (specified by the CIG signal) to the signal line 38f, a call start pulse is generated to the signal line 38e.

Step 8128 represents normal transmission. In other words, transmission from the calling party to the called party is now possible.

In this embodiment, an example is considered in which polling transmission is performed in which no original is set in facsimile machine A on the calling side, and a manuscript is set on facsimile machine B on the called side.

However, originals are also set in facsimile machine A1 on the calling side and facsimile machine B on the called side, and the original set in facsimile machine A is first transmitted to the facsimile machine itself.

After that, open the line once. Then, the called party's facsimile machine B automatically makes a call and sends a call to facsimile machine ff1B.
The document set in the facsimile machine A may be transmitted to the facsimile machine A. The manuscript mentioned above is an example of information,
Of course, memory information etc. may also be used.

(Effect) As explained above, according to the present invention, the shadow of the charging pulse 6
This reduces the deterioration of the received image, and also makes it possible to perform erroneous retransmissions in international full-duplex operation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the facsimile machine of this embodiment. FIG. 2 is a diagram showing an example of the procedure according to this embodiment. 3 is a flowchart of the control of the control circuit 38 of FIG. 1 when a call is made, and FIG. 4 is a flowchart of the control of the control circuit 38 of FIG. 1 when a call is received. 2... NCU, 4... Telephone, 6... Hybrid circuit, 8... V21 modulator, 10... Reading circuit,
12... Encoding circuit, 14... Memory circuit, 16.
・・V27ter or V29 modulator, 1 B ・・
-Addition circuit, 20...V21 demodulator, 22...V2
7ter or V29 demodulator, 24... memory circuit, 26... decoding circuit, 28... recording circuit, 30.
... Transmission circuit, 32... Operation section, 34...
- Self-a telephone number recording circuit, 36...information presence/absence detection circuit, 38...control circuit.

Claims (1)

[Claims] a calling means for making a call to the communication line in order to connect the communication line to a predetermined destination; and a calling means for making a call to the communication line to connect the communication line to the predetermined destination to which the communication line is connected by the calling operation by the calling means. a means for instructing the device to open and make a call and transmitting call data from the own device side to the predetermined destination; and a communication device for performing a communication operation when the communication line is connected by a call from the predetermined destination. A communication device comprising: