JPH01300673A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To select a proper circuit automatically by ringing a call tone when a matching performance of a high-order layer receives unclear call, lifting up a handset (hook off) and detecting a CNG signal or a 7E flag. CONSTITUTION:If no high order layer matching information element is included in a call setting message, a call tone is generated, off-hook is detected and if off-hook is detected, a selected channel is connected to a talking means 65 to detect a CNG signal of G2/G3 protocol and a 7E flag of G4 protocol. With the CNG signal detected, the selected channel is connected to a G2/G3 protocol control means 66 and with the 7E flag detected, the selected channel is connected to the G4 protocol control means 67.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a facsimile machine, and in particular,
The present invention relates to a facsimile device used in the INS (ISDN) network and having multiple functions such as a telephone device, and a 02/G3 facsimile device and a G4 facsimile device.

(Prior Art) FIG. 10 is a diagram showing a procedure for transmitting information when connecting a line in the INS network. In the figure, information transmission indicated by a broken line indicates that it is treated as an option.

When an INS receives a call, it sends a "call setup" message (
Reference numeral A) in FIG. 10 is transmitted from the network side. This "Call Setup" message contains the "Protocol Identifier" and "Call Number".
, ``message type,'' and ``transmission ability,'' as well as other optional information elements as needed.

By analyzing these various information elements, the receiving terminal
It is possible to specify what communication purpose the current call has.

Here, the data that identifies whether the communication is a telephone call, G2/G3 facsimile communication, G4 facsimile communication, etc. is included in the "Call Setup" message and is determined by "Higher Layer Compatibility". It is included in the information element. This "higher layer consistency" is treated as an option.

(Problems to be Solved by the Invention) The above-described conventional technology had the following problems.

In other words, as mentioned above, if the "higher layer consistency" that specifies communication is treated as an option, the calling device does not have the function to output this information element from the network side. When connecting the line, it is not possible to specify the communication purpose, and the line (selected channel) and G2
/Connection with G3 facsimile, G4 facsimile, handset, etc. does not occur smoothly.

The present invention has been made to solve the above-mentioned problems, and even when a call is received for which the integrity check of a higher layer is unclear at the time of line connection, an appropriate circuit is automatically selected, An object of the present invention is to provide a facsimile device that can perform reception well.

(Means and Effects for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a method for disabling a ring tone when a "high layer compatibility" information element is not included in a "call setup" message. When off-hook is detected, the selected channel is connected to the communication means, and the C of G2/G3 protocol is detected.
The NG signal and the 7E flag of the G4 protocol were detected, and the CNG signal was detected.

If the selected channel is connected to the 02/G3 protocol control means and the 7E flag is detected.
・The feature is that the selected channel is connected to the 64 brotoco small control means.

In this way, even if the operator picks up the handset and receives a call in which the integrity check of the higher layer is unclear, the appropriate circuit (communication means, G2
/G3 protocol control means or G4 protocol control means) can be automatically selected.

Another feature is that the CNG signal and the 7E flag are detected only at a scheduled time (first scheduled time).

If the CNG signal and the 7E flag are not detected even after the scheduled time has elapsed, there is a high possibility that the communication is a phone call.
This eliminates unnecessary energization of the signal and 7E flag detection circuits, which is economical.

In addition, “higher layer integrity” is applied to “call setup” messages.
If the information element is not included, start measuring the second scheduled time, and if off-hook is not detected before the second scheduled time total IIpl ends, generate the ring tone. at the same time as determining the "transfer capability" information element included in the "call setup" message, and determining whether the information element is r
3. ．． 1 [kHz] Audio" signal, connect the selected channel to the 02/G3 protocol control means, and if the information element is a "Unrestricted Digital" signal, further detect the CNG and 7E flags. Another feature is that the selected channel is connected to the 02/G3 protocol control means or the G4 protocol control means in accordance with the detection.

As a result, even when the operator is absent, the relevant communication
2/G3 facsimile communication or G4 facsimile communication, the communication can be performed.

Furthermore, if off-hook is not detected before the measurement of the second scheduled time ends, and the CNG signal or 7E flag is not detected even after the first scheduled time has elapsed, the line is disconnected. Another feature is that it is cut.

As a result, if the operator is absent and the communication is determined to be not G2/G3 facsimile communication or G4 facsimile communication, the line is disconnected and the power supplied to the facsimile device is reduced to the minimum level. can be kept to a minimum.

(Example) The present invention will be described in detail below with reference to the drawings.

FIG. 2 is a schematic block diagram of one embodiment of the present invention.

In FIG. 2, the system control section 1 includes a scanner section 2,
A printer section 3, a power control section 4, an operation panel 5, a storage device 6 such as a hard disk device, a handset 7 equipped with a speaker and a microphone, a G2/G3 protocol control module 8, a G4 protocol control module 9, and a line connection section 10. It is connected. The system control unit 1 includes a microcomputer, and each of the means 2 to
10 controls are performed.

The storage device 6 stores various programs for controlling the operation of the facsimile machine, system data, received image information and/or transmitted image information, and the like.

When the line connection unit 10 receives a call that is connected to a line and the integrity check of the higher layer is unclear, it automatically identifies the communication purpose of the call and connects the line to a predetermined circuit (G 2/G3 protocol control module 8
, G4 protocol control module 9, communication circuit (not shown), etc.).

FIG. 3 is a block diagram showing details of the line connection section 10 shown in FIG. 2. In FIG. 3, the same reference numerals as in FIG. 2 represent the same or equivalent parts.

First, the line is connected via the line interface 15.
It is connected to the layer 1 control circuit 16.

This layer 1 control circuit 16 identifies and responds to the layer 1 protocol, and performs various controls accordingly. This layer 1 control circuit 16 is connected to a layer 2 control circuit 17.

The layer 2 control circuit 17 processes and responds to the layer 2 protocol, and performs various controls accordingly. This layer 2 control circuit 17 has an INS internal bus 28 and a CP
It is connected to U bus 29.

The INS internal bus 28 has two B channels (Bl
and B2) and one D channel.

A CPU (or M
PU) 11 is connected to a CPU bus 29. Similarly, the ROM 12, RAM 13, and system interface 14 are also connected to the CPU bus 29.

The system interface 14 is connected to the system control section 1 (FIG. 2).

The CPU II identifies and responds to the layer 3 protocol for line connection, and also performs various controls accordingly.

The G4 interface 18 and the CODECs 19 and 20 are connected to the INS internal bus 28 and the CPU bus 29.
It is connected to the.

The G4 interface 18 is connected to the G4 protocol control module 9.

The C0DECs 19 and 20 are also connected to the handset 7 and the G2/G3 protocol control module 8 via a switching device 21.

The switching device +21 connects the CODEC 19 or 20 to the handset 7 or the G2/G3 protocol control module 8 according to the command output from the CPU II.

Note that the connection between the handset 7 and the CODEC 19 or 20 is performed via a communication circuit (not shown).

The channel selection circuit 24 is connected to the INS internal bus 28 and the CPU bus 29. The channel selection circuit 24 selects a predetermined channel based on a channel selection signal output from the CPU bus 29. Since this channel selection method is well known, its explanation will be omitted.

The CNG detection circuit 22 and the flag detection circuit 23 are connected to the channel selection circuit 24 and the CPU bus 29.

This CNG detection circuit 22 complies with CCITT Recommendation T.

30 ringtones CNG are detected. This CNG is the fourth
110 output every 2.5 seconds as shown in the figure.
0 [Hz], 0.5 second non-analog signal.

The flag detection circuit 23 converts a 7E (hexadecimal representation) digital signal sent from the transmitting side into 1 in order to extract a data link layer frame in the G4 protocol.
Detected twice or eight times in a row.

FIG. 5 is a diagram showing a bit pattern of the 7E flag, and FIG. 6 is a diagram showing a bit pattern when the 7E flag is sent as a shared 0 flag.

Both FIGS. 5 and 6 depict the case where the flag is detected three times in succession.

The flag detection circuit 23 can be easily constructed using a known method, so a description thereof will be omitted.

The G4 interface 18 and the CODEC 19
and 20 are provided with channel selection circuits 25 to 27 similar to the channel selection circuit 24. Each of the channel selection circuits 24 to 27 selects one of two B channels and one D channel.

FIG. 7 is a block diagram showing details of the CNG detection circuit 22 shown in FIG. 3. In Figure 7, the same symbols as in Figure 3 represent the same or equivalent parts, so
The explanation will be omitted.

In FIG. 7, the channel selection circuit 24 includes the flag detection circuit 23 and the D/A converter 31 of the CNG detection circuit 22.
It is connected to the.

The D/A:I inverter 31 is connected to a bandpass filter 32 that passes analog signals in a frequency band of 1100 [Hz].

The self-bandpass filter 32 is connected to a signal detection circuit 33 that detects a signal in a frequency band of 1100 [H2].

In this way, CNG is detected in the CNG detection circuit 22.

Furthermore, the configurations of the D/A converter 31, bandpass filter 32, and signal detection circuit 33 can be easily configured using known techniques, so a description thereof will be omitted.

FIG. 8 is a flowchart showing the operation of one embodiment of the present invention. In FIG. 8, first, in step S1, it is determined whether or not there is an incoming call.

In step S2, it is determined whether the information element "higher layer compatibility" is included in the "call setup" message. If there is a consistency information element, that is, if the call has a clear consistency check in the higher layer, the process moves to step S3.

In step S3, it is determined whether the consistency information element is "telephone".

If it is a "telephone", an alarm (operator's ring tone) is generated in step S4.

In step S5, it is determined whether or not the device is off-hook. If it is not off-hook, return to step S4,
If off-hook, after the line is connected to the communication means,
A call is started in step S6.

In step S7, it is determined again whether the device is off-hook, and if it is off-hook, the process returns to step S6. If not off-hook, the process ends after the line is disconnected.

In step S3, the consistency information element is "telephone".
If it is determined not to be the same, it is determined in step S8 whether or not the consistency information element is "rG 2 /G 3 communication".

If the consistency information element is "rG 2103 communication", the 02/G3 protocol control module 8 is selected (connected to the line) in step S9, and the 02/G3 protocol is started in step SIO. Communication is performed in step Sll, and then the line is disconnected and the process ends.

In step S8, the consistency information element is rG 2
/G3 communication", in other words, when it is determined that the consistency information element is "rG4 communication", the G4 protocol control module 9 is selected in step S12, and the G4 protocol control module 9 is selected in step S313. is started. Communication is performed in step S14, and then the line is disconnected and the process ends.

If it is determined in step S2 that the higher layer compatibility information element is not included, an alarm (ring tone) is generated in step S15.

In step 31B, it is determined whether or not the device is off-hook. If it is not off-hook, it is determined in step S17 whether a scheduled time (second scheduled time) has elapsed since activation of the alarm was started, that is, whether a timeout has occurred. If the timeout has not occurred, the process returns to step S15.

If it is a timeout, in step 5lllll,
It is determined whether the information transfer capability in the "transmission capability" which is an essential information element included in the "call setup" message is "voice (speech)."

If it is "audio", the process is carried out in step S4.
to move to.

"If the transfer ability is not "speech", step S1
At step 9, it is determined whether the "transmission capability" is "unrestricted digital". If it is not "unlimited digital", that is, "transmission capability" is r3.1 [KHz]
If it is determined that the audio is “audio”, step S
At 20, the G2/G3 protocol control module 8
is selected, and in step S21 02/G3
The protocol is started. After communication is executed in step S22, the line is disconnected and the process ends.

If it is determined in step S19 that the "transmission capability" is "unrestricted digital", step S19 is performed.
At 23, the G4 protocol control module 9 is selected. Note that this step is similar to step S2, which will be described later.
The process may be performed after the 7E flag is detected in step 6.

In step S24, the CNG detection circuit 22 (third
) is started.

In step S25, the flag detection circuit 23 (third
) is started.

In step 526, the flag detection circuit 23 determines whether the 7E flag has been detected.

If the flag is detected, the CNG detection circuit 22 is stopped in step S27, and step 82g
At this point, the flag detection circuit 23 is stopped.

Then, in step S29, the 64 protocol is started, and after communication is executed in step S30, the line is disconnected and the process ends.

If it is not determined in step 326 that the 7E flag has been detected, then in step S31 the CNG detection circuit 22 determines whether CNG has been detected. If CNG is detected, the process moves to step S41, which will be described later.

Note that if the process goes through step S31, the 62/G3 protocol control module 8 will be selected in step S9 executed later, but in this case, the G4 protocol control module 9 executed in step S23 will be selected. is deselected.

If CNG is not detected in step S31, steps S24 and S
At 25, the CNG detection circuit 22 and the flag detection circuit 2
3 is activated, it is determined whether a scheduled time (first scheduled time) has elapsed, that is, whether a timeout has occurred.

If the timeout has not occurred, the process returns to step S26. If the timeout has occurred, the line is disconnected in step S33, and the process ends thereafter.

If it is determined that the device is off-hook in step S16, the process moves to step S34, and the handset 7 (FIG. 2.3) connects to the telephone communication circuit (not shown).
, CODEC (CODEC 19 or 20 shown in FIG. 3), etc., to the line (selected channel).

In step S35, the CNG detection circuit 22 is activated.

In step S36, the flag detection circuit 23 is activated.

In step S37, the flag detection circuit 23 monitors the selected channel and determines whether or not the 7E flag is detected. If a flag is detected,
The CNG detection circuit 22 is stopped in step S38, and the flag detection circuit 23 is stopped in step S39.

After that, the process moves to step S12. Note that in this step S12, the G4 protocol control module 9 is selected, but at this time, the connection between the handset 7 and the line executed in step S34 is released.

If no flag is detected in step S37, it is determined in step S40 whether CNG is detected. If CNG is detected,
The CNG detection circuit 22 is stopped in step S41, and the flag detection circuit 23 is stopped in step S42. After that, the process moves to step S9. Although the G2/G3 protocol control module 8 is selected in step S9, the connection between the handset 7 and the line executed in step S34 is also released at this time.

If CNG is not detected in step S40, step S43 determines that a scheduled time (first scheduled time) has elapsed since the CNG detection circuit 22 and flag detection circuit 23 were activated in steps S35 and S36. It is determined whether or not, that is, whether or not a time lag has occurred. If the timeout has not occurred, the process returns to step S37. If it is a timeout, the CNG detection circuit 22 is stopped in step S44,
In step S45, the flag detection circuit 23 is stopped. After that, the process moves to step S6.

In this way, even if the "Call Setup" message does not contain the information element "Higher Ear Consistency", the purpose of the communication can be specified and the line can be connected to a G2/G3 facsimile machine, a G4 facsimile machine, or a G4 facsimile machine. Can be connected to a telephone device.

Note that when it is determined in step S17 that the timeout has occurred, the "transmission ability" is determined in step 318.
It is determined whether or not it is "audio", and if it is "audio", the alarm is further activated in step S5. If the operator does not pick up the handset (if it is determined that the timeout has occurred in step S17), it can be determined that the operator is absent, so the process of step S18 is omitted. Step S
It is also possible to directly proceed from step S17 to step S19.

FIG. 1 is a functional block diagram of an embodiment of the present invention. In this figure, the function of step 818 in FIG. 8 is omitted.

In FIG. 1, the communication path forming means 60 includes first to third connection means 61 to 63, and also transmits communication data of the selected channel, control data outputted from the CPU 11 (FIG. 3), etc. is input.

The first to third connection means 61 to 63 connect the selected channel to a communication means 65, G2/G3 protocol control means 66, and
and connected to the G4 protocol control means 67. Said G2
Although not shown, various devices for executing facsimile communication are connected to the /G3 protocol control means 66 and the G4 protocol control means 67.

The higher layer compatibility checking means 51 determines whether the ``call setup'' message includes a ``higher layer compatibility'' information element. If a consistency information element is included, the selection means 64 selects and energizes one of the first to third connection means 61 to 63 according to the consistency information element.

If the consistency information element is not included, the ringing tone (alarm) generating means 52 is activated, and the off-hook detecting means 53 and the ringing time monitoring timer means 54 are activated.

If off-hook is detected by the off-hook detecting means 53 before a timeout (second scheduled time) is detected by the calling time monitoring timer means 54, the first connecting means 61 is energized and the calling The sound generating means 52 and the ring time monitoring timer means 54 are stopped. At this time, the CNG/flag detection means 55 and the CNG/flag detection time monitoring timer means 56 are activated.

The CNG/flag detection means 55 detects the CNG signal of the G2/G3 protocol and the 7E flag of the G4 protocol. CNC;/Timer means 56 for monitoring flag detection time
If a CNG signal is detected by the CNG/flag detection means 55 before a timeout (first scheduled time) is detected by timer means 56 for time monitoring;
And the CNG/flag detection means 55 is stopped.

At this time, the biasing force of the first connecting means 61 is released.

Similarly, before a timeout is detected by the CNG/flag detection time monitoring timer means 5δ, the CNG
When the 7E flag is detected by the /flag detection means 55, the third connection means 63 is energized, and the CNG/
The flag detection time monitoring timer means 56 and the CNG/flag detection means 55 are stopped. Also at this time, the biasing of the first connecting means 61 is released.

CNG or 7E by the CNG/flag detection means 55
If a timeout is detected by the CNG/flag detection time monitoring timer means 56 before the flag is detected, the CNG/flag detection means 55 is stopped and a signal is input to one input terminal of the AND gate 59. Supplied. If no timeout is detected by the calling time monitoring timer means 54, the AND gate 59 remains closed and the line disconnection means 58 is not activated.

Now, if a timeout is detected by the ring time monitoring timer means 54 before the off-hook is detected by the off-hook detection means 53, the ring tone generation means 5
2 is stopped, and the transmission capability information element determining means 57 is also energized.

The transmission capability information element determining means 57 energizes the second connection means 62 when the "transmission capability" of the "call setup" message is the "r3.1 [1 kHz] audio" signal.

Further, when the "transmission capability" of the "call setup" message is an "unrestricted digital" signal, the transmission capability information element determining means 57 detects the CNG/flag detection means 55 and the CNG/flag detection means 55 and C
The NG/flag detection time monitoring timer means 56 is activated.

If the CNG signal is detected by the CNG/flag detection means 55 before a timeout is detected by the CNG/flag detection time monitoring timer means 56, the second
The connection means 62 is energized, and the CNG/flag detection time monitoring timer means 56 and the CNG/flag detection means 55 are stopped.

Similarly, if the CNG/flag detection means 55 detects the 7E flag before the CNG/flag detection time monitoring timer means 56 detects a timeout, the third connection means 63 is energized. Also, the CNG/flag detection time monitoring timer means 56 and the CNG/flag abnormality detection 5 are stopped.

If a timeout is detected by the CNG/flag detection time monitoring timer means 56 before the CNG signal or the 7E flag is detected by the CNG/flag detection means 55, the CNG/flag detection means 55 is stopped. , and one input terminal of the AND gate 59 is supplied with a signal. Here, since the signal (timeout signal) output from the ring time monitoring timer means 54 is input to the other input terminal of the AND gate 59, the AND gate 59 is opened and the line disconnection means 58 is activated. energized. As a result, the line is disconnected.

In this way, according to the functional block diagram shown in FIG.
The operations shown in FIG. 8 are performed.

Although this functional block diagram does not show the function of step S18 in FIG. 8 as described above, in order to achieve this function, the transmission ability information element determination means
determines whether the "transmission capability" of the "call setup" message is a "voice" signal, and if determined, generates a ring tone, and after off-hook is detected, the first connection means 61 may be energized.

FIG. 9 is a functional block diagram of another embodiment of the present invention.

In FIG. 9, the same reference numerals as in FIG. 1 refer to the same or equivalent parts, so a description thereof will be omitted.

As is clear from the comparison between FIG. 9 and FIG.
1.59 is omitted.

In this example, any one of the first to third connection means 61 to 63 is not energized until off-hook is detected by the off-hook detection means 53, but even in this case, the high layer consistency When no information element is included, any one of the first to third connection means 61 to 63 can be designated and energized.

Now, in the facsimile machine shown in FIG.
It is possible to omit the NG/flag detection time monitoring timer means 56. In other words, by detecting a timeout by the CNG/flag detection time monitoring timer means 56, if the communication is a phone call, the operation of the CNG/flag detection means 55 is stopped after the scheduled time elapses. This operation may be stopped when the communication ends, that is, when the call ends.

In addition, in the explanation regarding FIG. 1, the time of detection performed by the CNG/flag detection time monitoring timer means 56 is the first scheduled time, and the timer means 5 for monitoring the ringing time
Although the time detection performed by 4 is described as being the second scheduled time, it goes without saying that each of the timer means 54 and 56 may detect the same time.

With this configuration, it becomes possible to detect the first and second scheduled times using one timer means.

(Effects of the Invention) As is clear from the above description, according to the present invention, the following effects are achieved.

(1) In the facsimile apparatus according to claim 1, when a call with unclear high-layer compatibility is received, a ring tone is first sounded, and after the operator picks up the handset (off-hook), , CNG signal or 7
Since the E flag is detected, the line can be appropriately connected to any one of the telephone communication means, the G2/G3 facsimile control means, and the G4 facsimile control means.

(2. In the facsimile apparatus according to claim 2, if the CNG signal or the 7E flag is not detected even after the first scheduled time elapses after the operator picks up the handset, i.e. If the CNG signal or 7E flag is not detected even after a period of time that allows the communication to be identified as a phone call, the CNG
Since the detection of the signal or 7E flag is stopped,
It is possible to prevent the CNG signal and 7E flag detection circuit from being energized for a long time.

(3) In the facsimile apparatus according to claim 3, if off-hook is not performed even after the second scheduled time, r3.1 [kHz of the "transmission capability" information element] ] audio" signal or "unrestricted digital" signal, and if a 3.1 [kHz] audio signal is detected, connect the line to the 02/G3 facsimile control means and
If detected, the CNG signal or 7E flag is further detected, and depending on the detection result, the line is
It is connected to the G3 facsimile control means or the G4 facsimile control means.

Therefore, even when the operator is absent, the line can be properly connected to either the G2/G3 facsimile control means or the G4 facsimile control means.

(4) In the facsimile apparatus according to claim 4, furthermore, the off-hook is not performed even after the second scheduled time, and the detection of the CNG signal or the 7E flag is not performed after the first scheduled time. The line is disconnected if the communication is not completed within a certain period of time, so if the purpose of the communication cannot be determined and the operator is not present, it is possible to send a message to the facsimile machine. It is possible to prevent calls from being made more than necessary.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of an embodiment of the present invention. FIG. 2 is a schematic block diagram of one embodiment of the present invention. FIG. 3 is a block diagram showing details of the line connection section. FIG. 4 is a time chart showing the CNG signal waveform. FIG. 5 is a diagram showing the bit pattern of the 7E flag. FIG. 6 is a diagram showing a bit pattern when the 7E flag is sent as a shared 0 flag. FIG. 7 is a block diagram showing details of the CNG detection circuit shown in FIG. 3. FIG. 8 is a flowchart showing the operation of one embodiment of the present invention. FIG. 9 is a functional block diagram of another embodiment of the present invention. FIG. 10 is a diagram showing the procedure for transmitting information when connecting a line in the INS net. 8...G2/G3 protocol control module, 9...
・G4 protocol control module, 10... Line connection section, 11... CPU, 22... CNG detection circuit, 2
3...Flag detection circuit, 28...Internal bus for INS, 29...CPU bus, 51...High layer consistency check means, 52...Ring tone generation means, 53...
Off-hook detection means, 54... Call timer means, 55... CNG/flag detection means, 56...
CNG/flag detection time monitoring timer means, 57...
Transmission ability information element determination means, 58... line disconnection means,
59... AND gate, 60... Communication path forming means,
61...First connection means, 62...Second connection means, 63...Third connection means, 65...Telecommunication means, 6
6...G2/G3 protocol control means, 67...G
4 Protocol Control Means Representative Patent Attorney Michito Hiraki and 1 other person Figure 5 7 E #1 #2 131116
figure! Figure 10 Figure 8 (Part 2) Figure 8 (Part 3)

Claims (4)

[Claims] (1) A first connection means for connecting the selected channel to the communication means, a second connection means for connecting the selected channel to the G2/G3 protocol control means, and a second connection means for connecting the selected channel to the G4 protocol control means. a facsimile apparatus comprising a third connection means for connecting, a high layer compatibility check means for detecting a high layer compatibility information element of an ISDN call setup message; a ring tone generation means for generating a ring tone; an off-hook detection means for detecting off-hook when a higher layer compatibility information element is not detected;
CNG/flag detection means for detecting a G signal and a 7E flag; the first connection means is energized when off-hook is detected by the off-hook detection means; The energization is released when one of the CNG and 7E flags is detected by the CNG/flag detection means, the second connection means is energized when the CNG signal is detected by the CNG/flag detection means, and the third connection means is energized when the CNG signal is detected by the CNG/flag detection means. The facsimile apparatus is characterized in that the connecting means is energized when the 7E flag is detected by the CNG/flag detecting means. (2) When off-hook is detected by the off-hook detection means, detection of the first scheduled time is started, and the CNG
The apparatus further includes a CNG/flag detection time monitoring timer means that stops the detection upon detection of the signal or the 7F flag, and releases the energization of the CNG/flag detection means when the first scheduled time is detected. A facsimile machine according to claim 1, characterized in that: (3) If the high layer consistency information element is not detected by the high layer consistency check means, the second
a ringing time monitoring timer means that starts measuring a scheduled time and stops the measurement when off-hook is detected by the off-hook detection means; and a second scheduled time is detected by the ringing time monitoring timer means. carrying capability information element discriminating means for discriminating the carrying capability information element of the ISDN call setup message when the transfer capability information element discriminating means further comprises: [kHz] audio" signal is detected, and the CNG/flag detection means further causes the transmission capability information element discriminating means to detect the "[kHz] audio" signal.
3. A facsimile machine according to claim 2, wherein the facsimile machine is activated when an "unrestricted digital" signal is detected. (4) Line disconnection to disconnect the line when the first scheduled time is detected by the CNG/flag detection time monitoring timer means and the second scheduled time is detected by the ringing time monitoring timer means. The facsimile machine according to claim 3, further comprising means.