JP3046189B2 - Facsimile signal transmission equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile signal transmitting apparatus for multiplexing and transmitting a facsimile signal.

[0002]

2. Description of the Related Art FIG. 10 is a block diagram showing an example of a conventional facsimile signal transmission device. In FIG. 1, reference numeral 1 denotes a facsimile modulator / demodulator (hereinafter referred to as a modem) for restoring a facsimile signal modulated into an analog signal into a digital signal and modulating a digital facsimile signal into an analog signal. Multiplexed facsimile signals with other signals and send them to the bearer side,
This is a multiplexing device that separates a facsimile signal from a multiplexed signal from the bearer side and distributes it to the modem 1. The multiplexing device 2 multiplexes, for example, a facsimile signal and an ADPCM-converted audio signal.

Reference numeral 3 denotes an input terminal from which a facsimile signal modulated into an analog signal from the trunk side is input to the modem 1. Reference numeral 4 denotes an output terminal from which the facsimile signal demodulated into an analog signal by the modem 1 is output to the trunk side. It is. Reference numeral 5 denotes an output terminal from which the facsimile signal multiplexed by the multiplexer 2 is output to the bearer side, and reference numeral 6 denotes a facsimile signal to be demultiplexed sent from the bearer side is input to the multiplexer 2. Input terminal.

Here, an exchange accommodating a voice terminal, a data terminal, a facsimile terminal and the like exists on the trunk side, and the bearer side is connected to a high-speed line. FIG.
1 illustrates a case where N modems 1 to #N and N input terminals 3 and output terminals 4 corresponding to the respective modems 1 are provided.

Next, the operation will be described. Modem 1
Recommendation of the International Telegraph and Telephone Consultative Committee (hereinafter referred to as CCITT) 21, V.I. 27ter, V.A. 29, V33, V1
7 has a modulation / demodulation function based on G.7. The facsimile signal of the analog signal input to any of the input terminals 3 on the trunk side is transmitted to the modem 1 corresponding to the input terminal 3.
Thus, a digital signal of 9600 bps or the like is restored.

The digital signal restored by the modem 1 is sent to a multiplexer 2. The multiplexer 2 multiplexes the digital signal with other signals and outputs the multiplexed signal from the bearer-side output terminal 5 to a high-speed line. When receiving a signal from the high-speed line, the multiplexer 2 extracts a digitized facsimile signal from the multiplexed signal input from the input terminal 6 on the bearer side, and passes the digital signal to any one of the modems 1. . The modem 1 modulates the received digital signal, and outputs a facsimile signal based on an analog signal that is a modulated wave from the corresponding output terminal 4. In this case, the transmission and reception of the facsimile signal are performed in real time. Also, the N modems 1 can operate in parallel within the range of the multiplexing capability of the multiplexer 2.

In this system, the signal input to the input terminal 3 on the trunk side is limited to a facsimile signal. Therefore, at the stage prior to the input terminal 3 on the trunk side, control is performed so that an audio signal or the like is not supplied to the input terminal 3. For example, a circuit for distinguishing a facsimile signal from a voice signal is provided on the trunk side. When the start of the facsimile signal is detected by detecting a 2100 Hz tone or the like, control is performed to supply the signal on the trunk side to the input terminal 3. At the same time, the multiplexer 2 controls the signal received from the high-speed line to be supplied to the modem 1 as well. Also, 2100H
The opposite system is notified that the z tone has been detected. 2
The system notified of the 100 Hz tone detection performs control so as to supply a signal on the trunk side to the input terminal 3. When the modem 1 detects the DCS signal from the signal received from the high-speed line in the system that detects the 2100 Hz tone, the system determines that the communication channel is used for facsimile communication.

FIG. 11 is a functional block diagram showing an example of processing for a facsimile signal for multiplexing. In the figure, reference numeral 1a denotes a demodulation unit of the modem 1, 1b denotes a modulation unit, and 7 denotes a digital signal output from the demodulation unit 1a.
An oversampling circuit 8 performs oversampling only on a control signal of 0 bps, and a stuff control circuit 8 performs stuff control on data output from the oversampling circuit 7.

Reference numeral 9 denotes a transmission gate for controlling the passage of stuff-controlled data, and reference numeral 10 denotes a multiplex transmission path on the transmission side for transmitting data passing through the transmission gate 9. 11
Is a multiplexed transmission line on the receiving side through which data subjected to stuff processing by the opposite device is transmitted, and 12 is a receiving gate for controlling the passage thereof.

Reference numeral 13 denotes a destuffing control circuit for performing destuffing control on the data passing through the reception gate 12, and reference numeral 14 denotes a speed conversion of a control signal of 300 bps which is oversampled in the destuffed data. Is performed, and the data after the speed conversion is transmitted to the modulation unit 1 of the modem 1.
b is a speed converter for outputting to b.

Next, the operation will be described. The analog facsimile signal input to the input terminal 3 is converted into a facsimile signal digitized by the demodulation unit 1 a of the modem 1 and input to the oversampling circuit 7.

When the facsimile signal, that is, the demodulated data output from the demodulation unit 1a is a control signal of 300 bps, the oversampling circuit 7 converts the demodulated data synchronized with the demodulated clock extracted by the demodulation unit 1a to 9600 bps. Convert to a considerable signal. Thereafter, the stuff control circuit 8 provides stuff data to absorb the difference from the transmission clock of the multiplex transmission path 10 on the transmission side, and further adds stuff control information.

If the demodulated data output from the demodulation unit 1a is high-speed data such as 9600 bps, only stuff control is performed without performing oversampling processing. The data subjected to the stuff control is added with the stuff control information, and becomes a signal equivalent to 10 kbps for one facsimile signal, for example.

The data on the multiplex transmission line 11 on the reception side passes through the reception gate 12 and is input to the destuff control circuit 13. The destuff control circuit 13 first determines whether the stuff data is regular data or dummy data based on the stuff control information included in the input data.

If the data output from the destuff control circuit 13 is a control signal of, for example, 300 bps, the speed converter 14 converts the speed of a received signal corresponding to 9600 bps into a signal of 300 bps. The data thus destuffed is input to the modulation section 1b in synchronization with the modulation clock given from the modulation section 1b of the modem 1, is modulated to be an analog facsimile signal, and is output to the output terminal 4.

FIG. 12 is a block diagram showing another conventional facsimile signal transmission apparatus for multiplexing and transmitting a facsimile signal. In the figure, reference numeral 15 denotes a reception control unit which performs a reception operation in opposition to a facsimile terminal (specifically, via a switchboard) existing on the trunk side, and 16 denotes a facsimile terminal existing on the trunk side. And a transmission control unit that performs a transmission operation in opposition to the above. Reference numeral 17 denotes a reception data storage for storing image data received by the reception control unit 15, and reference numeral 18 denotes a transmission data storage for storing image data to be transmitted by the transmission control unit 16. In addition, FIG.
N reception control units 15 and transmission control units 1 of # 1 to #N
6 illustrates a case where 6 is provided.

Next, the operation will be described. An arbitrary reception control unit 15 communicates with the facsimile terminal performing the transmission operation via the corresponding input terminal 3 and output terminal 4 on the trunk side. Then, the received image data is stored in the received data storage 17.

When there is an empty channel on the high-speed line side, the multiplexing device 2 sends out the image data in the received data storage 17 from the output terminal 5 on the bearer side as a part of the multiplexed signal. On the other hand, the multiplexed signal input from the high-speed line is input to the multiplexer 2 from the input terminal 6 on the bearer side. Then, the multiplexing device 2 extracts the image data from the multiplexed signal, and stores the image data in the transmission data storage 18.

One of the transmission control units 16 calls a facsimile terminal as a receiver and communicates with the facsimile terminal. That is, the transmission control unit 16 functions as a facsimile transmitter, and transmits the image data in the transmission data storage 18 to the facsimile terminal. In addition,
If the transfer destination facsimile terminal is already in use, the transmission control unit 16 performs a retransmission operation after a predetermined time. Further, the number of the transmission control units 16 shown in FIG. 12 may be one. However, in this case, the average time during which the image data stays in the transmission data storage 18 becomes longer, and the immediacy of facsimile communication is lost.

[0020]

Since the conventional facsimile signal transmission apparatus is configured as described above,
If no 0 Hz tone or DCS signal is detected, facsimile signal transmission via the modem 1 or the like cannot be performed, and the facsimile signal is handled and transmitted in the same manner as a voice signal or the like. That is, ADPCM conversion is performed and transmitted. This situation continues until the end of facsimile communication. Therefore, even if the configuration shown in FIGS. 10 and 12 is provided, if no 2100 Hz tone or DCS signal is detected, the effect of improving the transmission efficiency by the configuration (this is called a facsimile transmission system) is exhibited. There was a problem that it was not done.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. A facsimile signal transmitted as a voice signal or the like can be switched to a facsimile transmission system even during facsimile communication. An object is to obtain a signal transmission device.

[0022]

Means for Solving the Problems] facsimile signal transmitting device according to the first aspect of the present invention, a modem for demodulating a full Akushimiri signal, the modem demodulation output when the input signal is a facsimile signal, the audio signal Ya A multiplexing controller that supplies the multiplexer with a facsimile route different from the data signal transfer route, and a transmission route that supplies the input signal to the voice signal or data signal transfer route and / or the modem side; Switch and input signal
Monitored, upon detection of a tone signal to the transmission route switch, a signal discriminator instruct also supplies an input signal to the side of the modem, the modem high-speed facsimile signal
Control means for instructing the transmission route switcher to supply an input signal only to the modem when demodulating the signal, and outputting a high-speed facsimile signal demodulated by the modem.
Facsimiles different from the voice and data signal transfer route
And a multiplexing controller for supplying to the multiplexing device by rerouting .

According to a second aspect of the present invention, there is provided a facsimile signal transmitting apparatus for decoding a facsimile signal.
And the modem if the input signal is a facsimile signal
What is the demodulation output of audio and data signal transfer routes?
Multiplexing to Multiplexers via Different Facsimile Routes
Controller and an input signal to transfer audio and data signals.
To the card and / or modem.
Transmission route switcher to supply and monitor input signal
When an audio signal is detected, the
Signal to supply the input signal to the modem
The discriminator and the modem demodulated the high-speed facsimile signal
A route control means for instructing the transmission route switcher to supply an input signal only to the modem ,
The high-speed facsimile signal demodulated by the
A facsimile route different from the signal transfer route
And a multiplexing controller for supplying to the multiplexing device .

[0024] Then, the facsimile signal transmitting device according to the third aspect of the present invention, the facsimile signal transmitting device according to the invention of claim 1 or claim 2, wherein, the modem
Demodulates the EOL of the high-speed facsimile signal,
A file is inserted into a high-speed facsimile signal.

[0025]

The signal discriminator according to the first aspect of the present invention comprises:
Monitors the input signal and sends a signal when a tone signal is detected.
Input signal to the modem
Is also supplied.

A signal discriminator according to a second aspect of the present invention .
Monitors the input signal and detects a non-voice signal.
Input signal to the transmission route switcher on the modem side
Is also supplied.

The model according to the third aspect of the present invention.
When demodulating the EOL of a high-speed facsimile signal
To insert a file into a high-speed facsimile signal
is there.

[0028]

[Embodiment 1] Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a facsimile signal transmission apparatus according to an embodiment of the present invention. In the figure, reference numeral 21 denotes a trunk-side input terminal to which a voice signal or a facsimile signal is transmitted, and 22 denotes a trunk-side output terminal. It is. The input terminal 21 and the output terminal 22 on the trunk side are connected to an exchange accommodating, for example, a voice terminal or a facsimile terminal. Reference numeral 23 denotes a modem for modulating and demodulating a facsimile signal, and reference numeral 24 denotes a multiplexing controller for controlling multiplexing of facsimile control signals and image data.

Reference numeral 25 denotes a voice output terminal on the bearer side for transferring voice signals, 26 denotes a voice input terminal on the bearer side, 27 denotes a facsimile output terminal on the bearer side for transmitting facsimile signals, and 28 denotes a bearer side. Facsimile input terminal. The route connected to the audio output terminal 25 and the audio input terminal 26 on the bearer side constitutes an audio signal path (hereinafter referred to as an audio route).
The route connected to the facsimile output terminal 27 and the facsimile input terminal 28 on the bearer side constitutes a facsimile signal route (hereinafter, referred to as a facsimile route).

29 is based on a command from the multiplexing controller 24,
This is a transmission route switching unit that switches between outputting a signal input from the input terminal 21 on the trunk side to the output terminal 25 of the voice route, outputting the signal to the modem 23, or outputting both of them. Reference numeral 30 denotes a reception route switching device for switching between transmitting the output of the modem 23 from the output terminal 22 on the trunk side and transmitting the signal input to the input terminal 26 of the voice route from the output terminal 22 on the trunk side.

32 is CCITT Recommendation V.32. 29, V.S. 27
ter and V.I. A demodulation unit (V.29 demodulation unit) having a modem 23 conforming to
Is Recommendation V. 33, V.I. 17 and V.I. 21 is a demodulation unit (V.33 demodulation unit) including a modem 23 conforming to V.21.

The facsimile signal switched by the transmission route switch 29 is transmitted to the V.34. 29 demodulation unit 3
2 and V. 33 is a demodulation unit switcher that switches to one of the 33 demodulation units 33. 35 is V. 29 is a transmission processor having a function of controlling switching of the demodulation unit switch 34 in accordance with a unit switching instruction output from the demodulation unit 32, and 36 is a reception processor having a control function of the same demodulation unit switch 34. Reference numeral 57 denotes a signal discriminator for discriminating whether the signal input to the trunk input 3 is a facsimile signal or a voice signal. Note that the transmission processor 35 is also a route control unit.

FIG. 2 shows a digital multiplexer (hereinafter, DCME) having a voice insertion function (hereinafter, referred to as DSI function).
It is called a device. It is a block diagram which shows an example of connection form of ()). A trunk input 47 is input to the DCME device 39,
A trunk output 48 is output from the DCME device 39. The trunk input 51 is input to the DCME device 40,
A trunk output 50 is output from the DCME device 40. The DCME devices 39 and 40 are connected by high-speed digital lines 41 and 42. The trunk input 47 and the trunk output 48, and the trunk input 51 and the trunk output 50 are respectively connected to the exchange.

Regarding the DCME device, CCITT Recommendation Q. 50, and these DCME devices 39 and 40 are also referred to in Recommendation Q.50. 50. The DCME device 39 is shown in FIG.
The signal is received from the trunk side in the signal format 53 as shown in the lower part of FIG. Then, it detects whether or not the voice channel is voiced, and if voiced, searches for an empty channel on the bearer side. If there is an empty channel, an audio signal is set to that channel, and a signal is sent to the bearer in a signal format 52 as shown in the upper part of FIG. When the voice channel on the trunk side becomes unvoiced, the signal of the corresponding channel on the bearer side is stopped. Then, the connection state of each channel is set to an assignment channel (AC).

When the signal of the signal format 52 is input from the bearer side, the DCME device 40 on the partner side reconfigures the signal and outputs it to the trunk output 50. In this way, the sound signal input to the DCME 39
The data is output from the CME device 40 to a corresponding voice channel on the trunk side. As described above, on the bearer side,
Since only the audio signal is transmitted, the number of channels can be reduced. The number of channels is reduced to ４ to ５ by the ADPCM function for reducing the number of transmission bits together with the DSI function.

Incidentally, Recommendation Q. 50 has 64 kbp
An s clear channel and a transmission path setting request signal for data in the voice band are defined. Since the signal on the voice channel on the bearer side is reduced in transmission rate by adopting ADPCM, terminal data of 64 kbps cannot be transmitted on that channel. However, if a 64 kbps channel prepared on the bearer side is used, such data transmission becomes possible. That is, when such data is generated, 64 kbps is transmitted to the DCME device 19.
, A 64 kbps clear channel may be set.

The on-demand request for the 64 kbps clear channel is output from an exchange or the like in the configuration shown in FIG. That is, the exchange or the like transmits a 64 kbps on-demand request signal (SIG) using the time slot (TS) # 16 in the signal format 53 on the trunk side shown in the lower part of FIG. Then, an empty channel is searched for, for example, CH # 1, C # in the signal format 53.
A 64 kbps clear channel as indicated by H # 2 is set as an empty channel.

FIG. 4 shows a facsimile signal transmission apparatus using a DCM.
FIG. 2 is a system configuration diagram of a system connected by high-speed digital lines via E devices 39 and 40. In the figure, 3
Reference numerals 7 and 38 denote facsimile signal transmission devices each having the configuration shown in FIG.

Reference numeral 43 denotes an audio route formed by a path connected to the audio route of the voice output terminal 25 and the audio input terminal 26 on the bearer side of the facsimile signal transmission device 37, and 44 denotes a facsimile output terminal 27 on the bearer side. And a facsimile route formed by a path connected to the facsimile input terminal 28. 45
Is an output terminal on the trunk side of the facsimile signal transmission device 38, and 46 is an input terminal on the trunk side.

The 64 kbps clear channel is allocated when an on-demand request occurs.
It is assigned to a random position in the signal format 53. Then, the facsimile signal transmission devices 37 and 38 shown in FIG. 50
The facsimile signal is transmitted using the 64 kbps clear channel setting function.

Next, the operation will be described with reference to FIGS. First, the signal input to the input terminal 21 on the trunk side is supplied to the output terminal 25 for the voice route and the modem 23 by the transmission route switch 29.
Until the modem 23 detects the facsimile signal, the signal on the trunk side is output via the output terminal 25 of the voice route to the DCM.
The E device 39 is provided. As described above, the DCME device 39 transfers a sound signal using an empty channel.

Assuming that the signal on the trunk side is constituted by the signal format 55 shown in FIG. 5 and a facsimile signal is set in TS # 1, the modem 23 demodulates a facsimile control signal from the facsimile signal. . Note that DA conversion is required before demodulation,
In order to simplify the description, the description of the processing will be omitted below. The demodulation result is notified to the multiplexing controller 24.

When recognizing that the modem 23 has demodulated and output the control signal, the multiplexing controller 24 gives a switching instruction to the transmission route switching unit 29. The transmission route switch 29 prevents the signal on the trunk side from being output to the output terminal 25 of the voice route in response to the switching instruction. As a result, the output of the audio route output terminal 25 is silent.

The multiplexing controller 24 controls the TS # 16 in the facsimile route signal format 54 shown in FIG.
To set the 64 kbps clear channel using DCM
Request to E device 39. Further, the multiplexing controller 24
As shown in FIG. 5, the output of the modem 23 is set to CH # 1 and transferred to the DCME device 39. Here, CH # 1 in the signal format 54 is 64 kbps, and if the facsimile image data is 9.6 kbps, it can be divided into six sub-channels as shown in FIG. That is, the outputs of the plurality of modems 23 are output to CH # 1.
Can be set. If the transmission route is lower than 9.6 kbps, more subchannels can be set.

Upon receiving the 64 kbps clear channel on-demand request, the DCME device 39 searches for an empty channel on the bearer side, and as shown in FIG.
CH # 1, which is a 4 kbps clear channel, is set.
The facsimile control signal and image data are stored in CH # 1.
Is transmitted to the partner DCME device 40 using The DCME device 40 that has received it transfers the contents of CH # 1 to the facsimile signal transmission device 38.

Further, the multiplexing controller 24 exchanges information with the multiplexing controller of the other party's facsimile signal transmission device 38 by using the signal format 5 of the facsimile route.
4 sets a fax assignment channel (hereinafter, referred to as ACF). In the ACF, a transmission rate of image data, an array of multiplexed data, a supplementary state and a use state of a 64 kbps clear channel, and the like are set.

This ACF is supplied from the multiplexing controller 24 to the DCM.
The data is transferred to the E device 39, and the DCME device 39 sets the signal format to the bearer side signal format 52 and sends it to the DCME device 40. The ACF is further transferred to the multiplexing controller 24 of the facsimile signal transmission device 38. The multiplexing controller 24 on the other side issues a switching instruction to the reception route switching unit 30 based on the contents of the ACF, and passes the received contents of CH # 1 to the modem 23. The modem 23 modulates the signal supplied from the multiplexing controller 24, places the modulated wave on the facsimile channel F1 of TS # 1 in the signal format 55, and outputs the modulated wave to the reception route switch 30. Since the receiving route switching unit 30 outputs the output of the modem to the trunk side according to the instruction of the multiplexing controller 24, the output of the modem 23 is output from the output terminal 45 on the trunk side.

When the multiplexing controller 24 recognizes the end of the facsimile communication based on the content of the control signal demodulated and output by the modem 23, the ACF notifies the multiplexing controller 24 of the end to the ACF. In addition, transmission route switcher 2
9 is given a switching instruction, so that the output on the trunk side is output to the output terminal 25 of the voice route. Further, the multiplexing controller 24 on the other side gives a switching instruction to the reception route switching unit 30 so that the input signal of the input terminal 26 of the voice route is output to the trunk side.

Thereafter, the DCME device 39 sets the C on the bearer side.
Release H # 1. As a result, the channel that was CH # 1 becomes an empty channel. When a facsimile signal is being transmitted by CH # 1 and another facsimile communication is started, a new 64 kbps clear channel is set. Channels not used as the 64 kbps clear channel are used for voice transmission using the DSI function. Accordingly, each channel on the bearer side is used efficiently for voice signals and facsimile signals, and the transmission efficiency of the system shown in FIG. 4 is higher than that of the system using only the DCME devices 39 and 40 shown in FIG.

Next, a specific operation of the facsimile signal transmission apparatus will be described with reference to FIGS. In the opposed system, when the signal discriminator 57 detects the 2100 Hz tone, the fact is notified. 2100H
When the z-tone detection is notified (step ST1), the multiplexing controller 24 controls the transmission route switch 29 so that the input signal is also supplied to the demodulation units 32 and 33 via the demodulation unit switch 34. Switch (step ST2).

When any one of the modems 23 in the demodulation units 32 and 33 succeeds in demodulating the DCS signal (step ST3), it notifies the multiplexing controller 24 of the fact. The multiplexing controller 24 controls the transmission route switch 2 so that the input signal is supplied only to the demodulation unit switch 34.
9 is switched (step ST4). Transmission processor 3
5 is a demodulation unit 32, depending on the content of the DCS signal.
The demodulation unit switch 34 is switched so that the signal is supplied to any of the devices 33 (steps ST5 and ST5).
6, ST7).

Here, when a facsimile apparatus which does not handle the CED signal is connected, the 2100 Hz tone cannot be detected. In addition, DC
The detection of the S signal may not be successful. In such a case, the processing of steps ST4 to ST7 is not executed. However, in this embodiment, a signal discriminator 57 is provided in a stage preceding the transmission route switch 29, and the signal discriminator 57 constantly monitors the input signal as shown in the flowchart of FIG.

That is, when detecting that the input signal is a voice signal, the signal discriminator 57 controls the transmission route switch 29 so that the input signal is not supplied to the demodulation unit switch 34 ( Step ST1
1, ST12, ST13). However, when it is detected that the input signal is not an audio signal, the transmission route switch 29 is controlled so that the input signal is supplied to the demodulation unit switch 34. Then, the input signal becomes the demodulation unit 3
2 and 33 (step ST14).

If any one of the modems 23 of the demodulation units 32 and 33 receives When the demodulation of 21 signals is successful, that is,
If a flag signal that continues for a certain period of time is detected, it is determined that a facsimile procedure signal has been detected, and the fact that the facsimile signal has been detected is notified to the multiplexing controller 24 or the transmission processor 35 and the reception processor 36 (steps ST16 and ST17). Also, if necessary, it notifies the opposing system. The multiplexing controller 24 or the transmission processor 35 controls the transmission route switch 29 so that no signal is supplied to the output terminal 25 of the audio route (step ST19).

As described above, the input signal is supplied to the demodulation units 32 and 33, and the multiplexing controller 24 outputs the demodulated facsimile signal to the output terminal 5 of the facsimile route (step ST20). If necessary, the multiplexing controller 24 or the reception processor 36 switches the reception route switch 29 so that the signals from the demodulation units 32 and 33 are output to the output terminal 4.

If the facsimile signal cannot be detected, the transmission route switching unit 29 is switched under the control of the multiplexing controller 24 or the transmission processor 35 so that the input signal is not supplied to the demodulation unit switching unit 34 ( Steps ST17 and ST13).

In step ST16, CCI
TT Recommendation T. When a signal from the facsimile 30 is detected, a facsimile signal may be detected. When a facsimile signal is detected, the transmission route switching unit 2 checks that the modem has been turned off.
9 are executed (step ST18). By performing such control, an adverse effect upon switching to a signal is prevented.

Embodiment 2 FIG. In the above embodiment, after the facsimile communication starts, the V.V. 21 shows a case in which the signal route is switched from the voice route to the facsimile route when the facsimile signal is detected by the F.21, but it is also possible to switch to the facsimile route when the image signal is detected. In that case, control is performed as shown in the flowchart of FIG. The device configuration may be the configuration shown in FIG.

After the voice discriminator 57 detects a non-voice signal, the modem 23 outputs the V.264 signal. If the facsimile signal cannot be obtained by the modem 21, the modem 23 in the demodulation units 32 and 33 is set to each of the modulation and demodulation modes for the high-speed signal. When the modem 23 in a certain mode normally detects the training signal of the high-speed facsimile signal, it notifies the multiplexing controller 24 or the transmission processor 35 and the reception processor 36 of the fact (step ST21). Then
The transmission processor 35 and the like perform switching control in the same manner as in the first embodiment (step ST18 to step S18).
T20).

It should be noted that the transmission route switching unit 29 is also used here.
Is executed after confirming that the modem is in a no-signal state. Further, the detection processing of the high-speed facsimile signal may be performed by detecting the EOL included in the image signal instead of detecting the training signal.

Embodiment 3 FIG. FIG. 9 is a flowchart showing the operation of the facsimile signal transmission apparatus according to the third embodiment of the present invention. The device configuration may be the configuration shown in FIG.

In this embodiment, as in the case of the first embodiment, after the start of facsimile communication, V.A. 21 when the facsimile signal is detected, the signal route is switched from the voice route to the facsimile route (steps ST14 to ST19), and when the image signal is detected, the facsimile route is switched. However, if the modem 23 is EO
When L is detected (step ST31), a fill (FILL) is inserted after the EOL (step ST3).
2). In this case, the transmission processor 35 and the like perform the switching control while inserting the FILL as in the first embodiment (steps ST18 to ST20).

The facsimile signal transmission device of the opposing system, when an error occurs in the FILL portion at the time of route switching, and when the error can be detected, replaces the error with the FILL. The facsimile apparatus on the opposite system side discards the FILL when decoding the high-speed facsimile signal, so that such control can prevent adverse effects on the image signal.

In this case, as in the second embodiment, the switching control is performed without waiting for the end of the image signal.
The facsimile route is used more effectively.

[0065]

As evident from the foregoing description, according to the first aspect of the invention, the modem when the input signal is a facsimile signal
What is the demodulation output of audio and data signal transfer routes?
Multiplexing to Multiplexers via Different Facsimile Routes
Controller and an input signal to transfer audio and data signals.
To the card and / or modem.
Monitor the input signal and the transmission route switcher to supply
When a tone signal is detected, the transmission route switcher
And instruct the modem to supply the input signal
Signal discriminator and modem demodulate high-speed facsimile signal
Input signal to the transmission route switch
Route control means for issuing an instruction to supply only to the dem,
The high-speed facsimile signal demodulated by the modem is converted to a voice signal or
Facsimile route different from the data signal transfer route
Since it has a configuration including a multiplexing controller for supplying to the multiplexing device, a facsimile signal can be detected even during facsimile communication, and a facsimile route can be used during facsimile communication. In comparison, the use efficiency of the high-speed digital line is improved.

Further, according to the second aspect of the invention, modem demodulated output when the input signal is a facsimile signal
To a different path than the voice and data signal transfer route.
A multiplexing controller that supplies a multiplexing device by a x-ray route
The input signal to the audio signal and data signal transfer routes and
To the modem and / or modem.
Monitor the input signal and switch the non-voice signal
Signal is detected, the transmission route switcher
Signal identification that instructs the modem to supply the input signal
And modem demodulated high-speed facsimile signals
Input signal to the transmission route switcher
Control means for issuing an instruction to supply only to the side, and a modem
The high-speed facsimile signal demodulated by the
Multiplexing with a facsimile route different from the transfer route of the signal
And a multiplexing controller that supplies the equipment.
Therefore, even during facsimile communication, facsimile signals
Can be detected, and facsimile
Reroute can be used, the effect of using efficiency on improvement of high-speed digital line as compared with the conventional case.

According to the third aspect of the present invention,
The modem demodulates the high-speed facsimile signal EOL.
In this case, the file is inserted into the high-speed facsimile signal, so that the use of the facsimile route can be started even during the transmission of the high-speed facsimile signal, and the use efficiency of the high-speed digital line is further improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a facsimile signal transmission device according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating an example of a connection configuration of a DCME device.

FIG. 3 is an explanatory diagram showing a signal format of input / output signals of the DCME device.

FIG. 4 is a system configuration diagram of a system in which a facsimile signal transmission device is connected via a high-speed digital line via a DCME device.

FIG. 5 is an explanatory diagram showing signal formats of input / output signals of a DCME device and a facsimile signal transmission device.

FIG. 6 is a flowchart illustrating an operation of the facsimile signal transmission device.

FIG. 7 is a flowchart showing the operation of the facsimile signal transmission device according to the first embodiment of the present invention.

FIG. 8 is a flowchart showing an operation of the facsimile signal transmission device according to the second embodiment of the present invention.

FIG. 9 is a flowchart showing an operation of the facsimile signal transmission device according to the third embodiment of the present invention.

FIG. 10 is a block diagram showing a conventional facsimile signal transmission device.

FIG. 11 is a block diagram showing a functional configuration of a conventional facsimile signal transmission device.

FIG. 12 is a block diagram showing another conventional facsimile signal transmission device.

[Explanation of symbols]

 23 Modem 24 Multiplexing Controller 29 Transmission Route Switching Device 35 Transmission Processor (Route Control Means) 57 Signal Discriminator

Claims (3)

(57) [Claims] 1. A facsimile signal and a voice signal or a data signal.
Recovers the facsimile signal of the input signal
Facsimile signal transmission device for adjusting the output to a multiplexer
At, H Modem for demodulating facsimile signals, Previous If the input signal is a facsimile signal,
The demodulated output of the
Supplies to the multiplexer via different facsimile routes.
Multiplexing controller and, Previous The input signal is routed to the audio and data signal
And either to the modem or to one of them
Transmission route switcher, When the input signal is monitored and a tone signal is detected
To For the transmission route switcher,Saidinput signal
Signal discriminator for giving an instruction to supply the same to the modem side
When, Previous The modemWhen demodulating a high-speed facsimile signal,
Before the transmission route switcherInput signal
Route control means for issuing an instruction to supply only to the modem side
When, Voice the high-speed facsimile signal demodulated by the modem
Facsimile different from signal and data signal transfer route
A multiplexing controller that supplies the multiplexing device by a route; Be prepared
A facsimile signal transmission device characterized by the following. 2. A facsimile signal and a voice signal or a data signal.
Recovers the facsimile signal of the input signal
Facsimile signal transmission device for adjusting the output to a multiplexer
At, H A modem to decode the facsimile signal, Previous If the input signal is a facsimile signal,
The demodulated output of the
Supplies to the multiplexer via different facsimile routes.
Multiplexing controller and, Previous The input signal is routed to the audio and data signal
And either to the modem or to one of them
Transmission route switcher, Previous Input signalWhen monitoring and detecting a non-voice signal,
PreviousFor the transmission route switcherSaidInput signal
A signal discriminator that issues an instruction to also supply to the modem side, Previous The modem has a high-speed facsimile signalWhen demodulating
For the transmission route switcherThe input signal
Route control means for issuing an instruction to supply only to the modem side
When, Voice the high-speed facsimile signal demodulated by the modem
Facsimile different from signal and data signal transfer route
A multiplexing controller that supplies the multiplexing device by a route; Be prepared
A facsimile signal transmission device characterized by the following. 3. The modem according to claim 1, wherein the modem is configured to transmit a high-speed facsimile signal.
When the EOL is demodulated, it is converted to a high-speed facsimile signal.
Claim 1 or Claim characterized in that the file is inserted.
3. The facsimile signal transmission device according to 2.