JPH10150543A - Facsimile equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable polling communication between former type receiver and new type transmitter by receiving a DCS signal showing the inclusion of password(PWD) communication as well as a DTC signal and further starting polling transmission operation when a PWD signal cannot be received. SOLUTION: A control circuit 20 controls entire facsimile equipment. First, when there is a terminated call response from the former type facsimile equipment, the DIS signal having the 50th bit '1' of FIF is transmitted and when the DCS signal having the 50th bit '1' of FIF is received but the DPWD signal cannot be received, the DIS signal is resent. As a result, when the DTC signal having the 50th bit '1' of FIF showing the performance of communication of PWD signal is received and further, when the PWD signal cannot be received, the control circuit 20 immediately starts the polling transmission operation. Thus, when new type equipment executes polling transmission, time for communicating can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile apparatus capable of transmitting a password (PWD).

[0002]

2. Description of the Related Art Conventionally, as a facsimile apparatus capable of performing password communication, the ITU-T recommendation defines the facsimile apparatus as follows.

The 50th bit of the DIS signal FIF, DT
The 50th bit of the 50th bit of the C signal FIF is 1 to indicate that there is a PWD signal receiving function, and 0 indicates that there is no PWD signal receiving function. Also, the 50th bit of the FIF of the DCS signal was fixed to 0. This procedure is called an old type.

[0004] Here, when an error occurs on the line even though the transmitter or the polling receiver is transmitting the PWD signal and the partner apparatus determines that the PWD signal is not transmitted, However, there arises a problem that communication that should not be permitted is permitted.

Therefore, in the ITU-T recommendation, DTC
50th bit of signal FIF, 5th of DCS signal FIF
The 0th bit is set to 1 to indicate that a PWD signal is transmitted, and to be set to 0 to indicate that a PWD signal is not transmitted. This procedure is called a new type.

[0006]

However, the FIF
Of the 50th bit is 1 and the FIF
Received a DTC signal whose 50th bit is 1,
If the WD signal cannot be received, it is determined that an error has occurred in the PWD signal on the line,
If the IS signal is continuously transmitted until the PWD signal can be received, there is a disadvantage that polling communication between the old type polling receiver and the new type polling transmitter becomes impossible.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a facsimile apparatus capable of performing polling communication between an old type polling receiver and a new type polling transmitter even when a PWD signal is not transmitted.

[0008]

Means for Solving the Problems The first invention of the present application is:
In a facsimile apparatus capable of transmitting a PWD signal,
DI including information indicating that it has a WD signal communication function
Although the DCS signal including the information indicating that the SWD signal is transmitted and performing the communication of the PWD signal is received, but the PWD signal cannot be received, the PWD signal is received until the PWD signal is received.
The DISC signal including the information indicating that it has the signal communication function is retransmitted, and the DTC signal including the information indicating that the PWD signal communication is performed is received. However, if the PWD signal cannot be received, the communication of the PWD signal is performed. A DIS signal including information indicating that the terminal has a function is retransmitted. If a DTC signal including information indicating that PWD signal communication is to be performed is received again, and a PWD signal cannot be received, the process proceeds to a polling transmission operation. It is characterized by doing.

[0009] Thus, polling communication between the old type polling receiver and the new type polling transmitter becomes possible.
It is possible to receive the signal from the old type transmitter with increased reliability. PWD in DCS signal from old type
This is because the information indicating whether or not to perform signal communication is fixed to not perform PWD signal communication.

[0010] Further, the second invention of the present application stores the destination when the PWD signal cannot be received even if the DTC signal including the information indicating that the PWD signal is to be communicated is received twice consecutively. After the next time, if a PTC signal cannot be received after receiving a DTC signal including information indicating that communication of a PWD signal is to be performed, the process immediately shifts to a polling transmission operation.

As a result, it is possible to reduce the communication time when a new type device executes polling transmission when an incoming call is received from an old type polling receiver.

In the third invention of the present application, a DCS signal including information indicating that communication of a PWD signal is not performed is received, but when a PWD signal is received,
DTC including information indicating that D signal communication is not performed
When a signal is received but a PWD signal is received, the PWD signal is made valid in both cases.

Thus, when the PWD signal is received, the information indicating whether to perform the communication of the PWD signal in the DTC signal and the content of the information indicating whether to perform the communication of the PWD signal in the DCS signal are included. Regardless, the processing can be performed reliably.

[0014]

FIG. 1 is a block diagram showing the configuration of a facsimile apparatus according to one embodiment of the present invention.

An NCU (network control unit) 2 connects to a terminal of the line in order to use the telephone network for data communication and the like.
It controls connection of a telephone exchange network, switches to a data communication path, and holds a loop. The NCU 2 connects the telephone line 2a to the telephone 4 when the signal level (signal line 20a) from the control circuit 20 is “0”, and connects the telephone line 2a when the signal level is “1”. It is connected to the facsimile machine side.
In a normal state, the telephone line 2a is connected to the telephone 4 side.

The hybrid circuit 6 separates the transmission system signal and the reception system signal, sends the transmission signal from the addition circuit 12 to the telephone line 2a via the NCU 2, and transmits the signal from the other party via the NCU 2. The signal is received and sent to the modem 8 via the signal line 6a.

The modulator / demodulator 8 is compliant with ITU-T Recommendation V. 8,
V. 21, V.I. 27ter, V.I. 29, V.I. 17, V.I.
34, and performs modulation and demodulation based on
Each transmission mode is designated by the signal line 20c. The modulator / demodulator 8 receives a signal output on a signal line 20b, outputs modulated data on a signal line 8a, receives a received signal output on a signal line 6a, and outputs demodulated data on a signal line 8b. Output.

The ANSam transmitting circuit 10 is a circuit for transmitting an ANSam signal. When a signal of a signal level "1" is output to the signal line 20d, the ANSam transmitting circuit 10 transmits an ANSam signal to the signal line 10a and outputs the ANSam signal to the signal line 20d. When the signal of the signal level “0” is being output, no signal is output to the signal line 10a.

The addition circuit 12 receives the information of the signal line 8a and the information of the signal line 10a, and adds the result of the addition to the signal line 12a.
a. The reading circuit 14 reads an image of a document and outputs the read image data to a signal line 14a. The recording circuit 16 is for sequentially recording information output to the signal line 20e line by line.

The memory circuit 18 is used to store raw information of read data or encoded information, and also stores received information or decoded information.

The operation unit 22 has a one-touch dial, abbreviated dial, numeric keys, * and # keys, a password registration key, a set key, a start key, and other function keys. Is done.

The password registering circuit 24 is a circuit for registering a password corresponding to a memory box. The password registering circuit 24 registers a password corresponding to a required memory box for the memory boxes 0 to 9 via a signal line 24a.

The old-type destination registration circuit 26 has a DTC signal FIF 50
This is a circuit for registering an old type destination for setting a bit to 1 via a signal line 26a. This destination uses a CIG signal.

The control circuit 20 controls the entire facsimile apparatus, and particularly in the present embodiment, performs the following control on transmission of a password signal.

First, D in which the 50th bit of the FIF is 1
An IS signal is transmitted and the 50th bit of the FIF is 1
If a CS signal is received but a PWD signal cannot be received, a DIS signal in which the 50th bit of the FIF is 1 is retransmitted until a PWD signal is received, and a DTC signal in which the 50th bit of the FIF is 1 is received. However, if the PWD signal cannot be received, the DI in which the 50th bit of the FIF is 1
The S signal is retransmitted.
When the DTC signal is received and the PWD signal cannot be received, the process proceeds to the polling transmission operation.

Here, when a DCS signal in which the 50th bit of the FIF is 0 is received, but a PWD signal is received,
Although the DTC signal in which the 50th bit of the FIF is 0 is received, when the PWD signal is received, the PWD signal is valid in both cases.

FIGS. 2 to 7 are flowcharts showing the control flow of the control circuit 20 according to the first embodiment of the present invention.

In FIG. 2, the operation starts at S0 and S2
Then, the signal of the signal level "0" is output to the signal line 20a to turn off the CML.

At S4, a signal of signal level "0" is output to the signal line 20d, and the ANSam signal is not transmitted.

At S6 and S8, automatic incoming
It is determined whether or not a manual incoming call is selected. If an automatic incoming call is selected, the process proceeds to S12, and if a manual incoming call is selected, S74 is performed.
The process proceeds to S10 if neither is selected.

Step S10 represents other processing. Here, when the registration of the password corresponding to the memory box is selected by the operation unit, the circuit 2 is connected via the signal line 24a.
Register to 4. Thereafter, the process returns to S2.

In S12, a signal of signal level "1" is output to the signal line 20a to turn on the CML. Then, in S14, the CED signal is transmitted. In S16, the 50th bit of the FIF of the DTC signal is 1,
The flag DTCRECF for determining whether or not information indicating that the PWD signal has not been received is cleared.

Next, in S18, the timer T1 is set to 35 seconds, and in S20, the NSF / CSI / DIS signal is transmitted. Here, the 50th bit of the FIF of the DIS signal is set to 1 to notify the other terminal that the PWD signal reception function is present.

In S22, 3 seconds are set in the timer T4.

At S24 and S26, SUB
/ PWD / NSS / TSI / DCS signal, SEP / PW
It is determined whether a D / NSC / CIG / DTC signal has been received. If a SUB / PWD / NSS / TSI / DCS signal has been received, the process proceeds to S56, and SEP / PWD / NSC / C
If an IG / DTC signal is received, the process proceeds to S32, and if neither is received, the process proceeds to S28.

In S28, it is determined whether or not the timer T4 has timed out. If the time has elapsed, the process proceeds to S30, and if not, the process proceeds to S24.

In S30, it is determined whether or not the timer T1 has timed out. If the time has elapsed, the process proceeds to S2, and if not, the process proceeds to S20.

In S32, it is determined whether or not the 50th bit of the FIF of the DTC signal is 1, and if it is 1, the process proceeds to S34, and if it is 0, the process proceeds to S46.

In S34, it is determined whether a PWD signal has been received or not. If a PWD signal has been received, the process proceeds to S36, and if a PWD signal has not been received, the process proceeds to S52.

In S36, it is determined whether or not the password (input from the information of the circuit 24) of the memory box designated by the SEP signal matches the received PWD signal. If they do not match, the process proceeds to S38.

In S38, a report is output to the effect that the communication is interrupted because the passwords do not match.

Further, in S40, the remaining pre-procedures, S42
Then, the polling transmission of the information stored in the memory box designated by the SEP signal is performed. In S44, the post-procedure is sequentially performed, and the process proceeds to S2.

In S46, it is determined whether or not a PWD signal has been received.
The process proceeds to S6, and if the PWD signal has not been received, the process proceeds to S48.

In S48, it is determined whether or not a password has been set in the memory box designated by the SEP signal by inputting information of the circuit 24. If a password has been set, the flow advances to S50 to set the password. If not, the process proceeds to S40.

In S50, a password is set in the memory box specified by the SEP signal, but the PWD signal is not transmitted from the partner device, so that a report indicating that polling transmission has an error is output.

In S52, it is determined whether or not the DTCRECF flag is 0.
RECF is set to 1, and the process proceeds to S20. If the value is 0, the process proceeds to S48.

In S56, it is determined whether or not the 50th bit of the FIF of the DCS signal is 1, and if it is 1, the process proceeds to S58, and if it is 0, the process proceeds to S68.

In S58, it is determined whether or not a PWD signal has been received. If a PWD signal has been received, the process proceeds to S60, and if a PWD signal has not been received, the process proceeds to S20.

In S60, it is determined whether or not the password of the memory box (inputting the information of the circuit 24) specified by the SUB signal matches the received PWD signal. If not, the process proceeds to S38.

In S62, the remaining pre-procedures are performed, and in S64,
Reception to the memory box specified by the SUB signal,
In S66, the post-procedure is sequentially performed, and the process returns to S2.

In S68, it is determined whether or not a PWD signal has been received.
The process proceeds to 0, and if the PWD signal has not been received, the process proceeds to S70.

In S70, it is determined whether or not a password has been set in the memory box designated by the SUB signal by inputting the information of the circuit 24. If the password has been set, the flow advances to S72 to set the password. If not, the process proceeds to S62.

In S72, a report is output to the effect that the reception has an error since the password is set in the memory box specified by the SUB signal, but the PWD signal is not transmitted from the partner device. Thereafter, the process proceeds to S2.

In S74, a signal of signal level "1" is output to the signal line 20a to turn on the CML. S76
Then, 35 seconds are set in the timer T1.

In S78, the NSF / CSI / DIS signal is transmitted. Here, the 50th bit of the FIF of the DIS signal is set to 1 to notify the other party that the function of receiving the PWD signal is present.

At S80, the timer T4 is set to 4.5 seconds. Then, in S82, SUB / PWD / NSS
It is determined whether the / TSI / DCS signal has been received. If it has been received, the process proceeds to S88, and if not, the process proceeds to S84.

In S84, it is determined whether or not the timer T4 has timed out. If the timer T4 has timed out, the flow proceeds to S86, and if the timer T4 has not timed out, the flow proceeds to S82.

In S86, it is determined whether or not the timer T1 has timed out. If the timer T1 has timed out, the process proceeds to S2, and if the timer T1 has not timed out, the process proceeds to S78.

At S88, it is determined whether or not the 50th bit of the FIF of the DCS signal is 1; if it is 1, the process proceeds to S90; if it is 0, the process proceeds to S68.

In S90, it is determined whether or not a PWD signal has been received. If not, the process proceeds to S78, and if it has been received, the process proceeds to S60.

Next, a second embodiment of the present invention will be described.

The second embodiment is different from the first embodiment in that the DT in which the 50th bit of the FIF is 1 consecutively twice.
When the C signal is received and the PWD signal cannot be received, this destination is stored. In the next and subsequent times, the DTC signal in which the 50th bit of the FIF is 1 is received. When the PWD signal cannot be received, polling transmission is immediately performed. It shifts to operation.

FIG. 8 is a flowchart showing a part of the above control operation that is different from the first embodiment (FIGS. 2 to 7).

In FIG. 8, S100 represents S0. Then, in S102, all the destinations of the old type are cleared via the signal line 26a. After that, S104
Proceed to 2.

S106 represents NO in S52. Then, in S108, the received CIG signal is registered in the circuit 26 via the signal line 26a. And S11
If it is 0, the process proceeds to S48.

S112 represents NO in S34. Then, in S114, the received CIG signal is
It is determined whether or not it is registered in the circuit 26. If it is registered in the circuit 26, the process proceeds to S118 (S48), and
If it has not been registered, the process proceeds to S116 (S52).

[0067]

As described above, according to the first invention of the present application, polling communication becomes possible between the old type polling receiver and the new type polling transmitter. It is also possible to receive signals from new type transmitters and old type transmitters with increased reliability. This is because the information indicating whether or not to perform the communication of the PWD signal in the DCS signal from the old type is fixed to not perform the communication of the PWD signal.

According to the second invention of the present application, there is an incoming call from the old type polling receiver, and the communication time when the new type device executes the polling transmission can be reduced. .

According to the third invention of the present application, the PW
When receiving the D signal, information indicating whether to perform communication of the PWD signal in the DTC signal, and DCS
Regardless of the content of the information indicating whether or not to perform the communication of the PWD signal in the signal, the processing can be reliably performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is a flowchart showing the operation of the embodiment.

FIG. 4 is a flowchart showing the operation of the embodiment.

FIG. 5 is a flowchart showing the operation of the embodiment.

FIG. 6 is a flowchart showing the operation of the embodiment.

FIG. 7 is a flowchart showing the operation of the embodiment.

FIG. 8 is a flowchart illustrating an operation according to another embodiment of the present invention.

[Explanation of symbols]

 2 ... NCU, 4 ... telephone, 6 ... hybrid circuit, 8 ... modulator / demodulator, 10 ... ANSam transmission circuit, 12 ... addition circuit, 14 ... read circuit, 16 ... recording circuit, 18 ... memory circuit 20 ... control circuit, 22 ... Operation unit, 24: Password registration circuit, 25: Password registration circuit, 26: Old type destination registration circuit

Claims (3)

[Claims] 1. A facsimile apparatus capable of transmitting a PWD signal, comprising:
Although the DCS signal including the information indicating that the IS signal is transmitted and performing the communication of the PWD signal is received, but the PWD signal cannot be received, the PW signal is received until the PWD signal is received.
DIS including information indicating that it has a D signal communication function
The signal is retransmitted, and the DTC signal including the information indicating that the communication of the PWD signal is performed is received. However, if the PWD signal cannot be received, the DIS signal including the information indicating that the communication function of the PWD signal is provided is retransmitted. However, the facsimile apparatus further receives a DTC signal including information indicating that communication of a PWD signal is to be performed, and shifts to a polling transmission operation when a PWD signal cannot be received. 2. The DTC according to claim 1, including information indicating that communication of a PWD signal is performed.
If the PWD signal cannot be received even after receiving the signal twice, the destination is stored, and the PW signal is stored in the next and subsequent times.
A facsimile apparatus wherein, when a DTC signal including information indicating that communication of a D signal is received and a PWD signal cannot be received, the facsimile apparatus immediately shifts to a polling transmission operation. 3. The method according to claim 1, wherein the information includes information indicating that communication of a PWD signal is not performed.
When the CS signal is received, the PWD signal is received, and when the DTC signal including the information indicating that the communication of the PWD signal is not performed is received, and when the PWD signal is received, the PWD signal is received. A facsimile machine characterized by being effective.