JPH01295558A - Communication system and facsimile equipment - Google Patents

Abstract

PURPOSE:To attain data transmission by automatic incoming call without intervention of the operator by discriminating whether the object of a call by a caller is talking or data transmission based on a signal sent from the caller side. CONSTITUTION:With a call coming to a telephone line 1, a call signal detection circuit 7 detects a call signal, a changeover circuit 6 is thrown to the position of a contact b3 to close a DC loop of the line and a voice reply device 8 is started. Then a CNG detection circuit 9 and a voice detection circuit 10 are operated. When a caller listens to a message and utters a voice signal is detected by the voice detection circuit 10 and a ring tone output circuit 16 is start. With the caller side being a facsimile equipment, a CNG signal is sent. When the CNG signal is detected, the facsimile equipment 5 is started. When both the CNG signal and the voice signal are not detected, the facsimile equipment 5 is started after a prescribed time elapses.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication system, such as a facsimile machine, which uses one telephone line to perform telephone calls and data transmission.

[Prior Art] For users who do not frequently perform facsimile communications, a subscriber telephone line is often connected to a telephone set and a facsimile machine for both telephone calls and facsimile communications.

[Problem to be solved by the invention] In such a case, if you switch the telephone line to the facsimile machine and set it to automatically receive calls, when the other party calls for the purpose of making a call, you will not be able to make the call. It disappears.

Conventionally, when a call arrives on a telephone line, the operator always picks up the handset of the telephone, checks the other party, and only if the other party is using a facsimile machine, switches the line to the facsimile machine and starts the facsimile machine. I had to do this operation.

For this reason, even though facsimile machines are equipped with a communication function for automatic call reception, there is an inconvenience in that an operator must always intervene to perform call reception operations.

Incidentally, such inconvenience also exists in, for example, communication systems in which data is transmitted over a telephone line shared with so-called personal computer communication or other telephone calls.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a communication system and a facsimile machine that can eliminate the above-mentioned inconvenience and allow data transmission by automatic call reception without operator intervention.

[Means for Solving the Problems] The present invention provides various communication systems that perform data transmission, in which a voice message is sent to a telephone line that is incoming and closed, and a voice message is transmitted based on a signal sent from a calling party. It determines whether the purpose of the call is a call or a data transmission, and if the call is a call, a ringing sound is output to notify the operator of the incoming call, while if the call is a data transmission, the telephone line is It connects to the transmission device side and executes data transmission.

In addition, facsimile machines are designed to detect unspecified frequency signals such as the caller's voice transmitted from the telephone line that is incoming and closed, and specific frequency signals such as the facsimile machine's CNG signal. If a signal of the above-mentioned specific frequency is detected for a certain period of time, 1. It is determined that the calling party is a facsimile machine and facsimile communication is executed, but if only a signal of the above-mentioned unspecified frequency is detected, or if the calling party is a facsimile machine. If it is not determined that there is.

The present invention is characterized in that the above-mentioned ringing sound is output to call an operator for a telephone conversation.

[Operation] As a result, if the calling party is a data transmission device or a facsimile device, predetermined communication is automatically executed, so that data transmission can be performed by automatic reception without operator intervention.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows a block diagram of a communication system for telephone calls and facsimile communications according to an embodiment of the present invention. In FIG. 1, a telephone line 1 is connected to a common terminal C□ of a switching circuit 2. It is connected. One contact a1 of the switching circuit 2 is connected to the telephone 3, and the other contact bi is
It is connected to the common terminal C2 of the switching circuit 4.

One contact a2 of the switching circuit 4 is connected to the facsimile machine 5, and the other contact b2 is connected to the common terminal C1 of the switching circuit 6. One contact a3 of the switching circuit 6 is connected to the calling signal detection circuit 7. The other contact point b3 is connected to the voice response device 8. CNG detection circuit 9. They are connected to the audio and detection circuits 10, respectively.

The ringing signal detection circuit 7 detects a ringing signal when a call is received from the telephone line, and the voice response device 18 transmits a preset voice message to the telephone line. Further, the CNG detection circuit 9 detects a CNG signal sent from a facsimile machine, and the voice detection circuit IO detects voice from a caller.

The off-hook detection circuit 11 detects when the telephone 3 is off-hook. The switching control circuit 12 switches the switching circuit 2, and similarly, the switching control circuit 13 switches the switching circuit 4, and the switching control circuit 14 switches the switching circuit 6.

The FAX activation control circuit 15 activates the facsimile machine 5 to execute predetermined facsimile communication by automatically receiving a call. The ringing sound output circuit 16 outputs a ringing sound from the speaker 17 to notify the user of an incoming call. The control circuit 18 controls each of the above sections.

The communication system of this embodiment has one or more configurations, and during standby without communication, the switching circuit 2 switches to the contact b side, the switching circuit 4 switches to the contact b2 side, and the switching circuit 6 switches to the contact a3 side. It's changing.

In this state, when a call arrives on the telephone line 1, the ringing signal is detected by the ringing signal detection circuit 7 as shown in FIG.
Process 21 V), switching @#! 6 is switched to the contact side, and the DC loop of the line is closed (process 22).

Next, a voice response device! 8 is activated. Voice response device 8
1. For example, if you want to send a facsimile, please press the start button on the device to start communication. Also, if you are on a call, please speak up." The message is recorded and sent to the line (process 23).

After this, the CNG detection circuit 9 and the audio detection circuit 10 are activated. The CNG detection circuit 9 detects a CNG signal sent from the line when the calling party is a facsimile machine.
4) The voice detection circuit IO detects human voice transmitted from the line (process 25).

Assuming that the calling party is making a telephone call, the calling party listens to the above-mentioned message on the handset of the telephone and speaks out. The voice is received over the line as an audio signal.

When this audio signal is detected by the audio detection circuit 10 (
V in process 25), the ringing sound output circuit 16 is activated and a ringing sound is output from the speaker 17 (process 2
6) The operator hears this ringing sound and takes the telephone 3 off-hook.

Off-hook of the telephone 3 is detected by the off-hook detection circuit 11 (Y in process 27), and at this time, the switching circuit 2
It is switched to the contact a1 side.

As a result, the operator communicates with the other party (process 28). When the call ends and the telephone 3 goes on-hook, the switching circuit 2. Each contact of the switching circuit 6 is returned to the initial standby state, and the DC loop of the line is opened and the line is disconnected (process 29).

On the other hand, if the calling party is a facsimile machine, some models of facsimile machines transmit a CNG signal when a called party establishes a line connection.

When this CNG signal is detected (Y in process 24), the switching circuit 4 is switched to contact a, and the facsimile machine 5 is activated (process 30). Predetermined facsimile communication is executed with the device (process 31).

When this communication is completed, the contacts of the switching circuit 4 and the switching circuit 6 are switched to the initial state, and the direct current loop of the line is opened to disconnect the line (process 29).

By the way, if neither the CNG signal nor the audio signal is detected (from N in process 24 to process 25 and N in process 25), their detection is executed for a preset period of time (from N in process 32 to process 24). fart).

Then, when the certain period of time has passed (Y in process 32),
Similarly to the above, the switching circuit 4 is switched to the contact a2 side, and the facsimile machine 5 is activated (process 33). This operation is for facsimile machines that do not send CNG signals.

When the facsimile device 5 is activated, for example, the CED
A predetermined transmission control procedure is started, such as sending out a signal and a DIS signal and waiting for a DO3 signal from the other party.

Here, if a correct response signal is not returned from the other party (Y in process 34), predetermined facsimile communication is executed (process 31); Y of processing 35), switching circuit 4,
Each contact of the switching circuit 6 is switched to the initial state, and the DC loop of the line is opened to disconnect the line (process 29).

Figure 3 is a time chart showing the operation of the facsimile machine until it starts up when no CNG signal is detected. As shown in (b), a voice message response is sent, and as shown in (c) of the same figure, detection of the CNG signal is started. Then, as shown in Figure (d), voice detection is started at the end of the voice message, and if no voice is detected after a certain period of time, the facsimile group [
5 is activated, and the CE
A D signal and a DIS signal are sent out. Facsimile machine 5
If a predetermined response signal is not returned immediately after a DIS signal is sent out, the DIS signal is repeatedly sent out intermittently as shown in FIG. 2(f). If a predetermined response signal is returned during this time, facsimile communication is executed.

As described above, in this embodiment, an incoming call to telephone line 1 is detected, a voice message is sent to the telephone line when the call arrives, and a ringing sound is heard when voice is sent from the calling party. The output circuit 16 outputs a ringing sound to notify the operator of the incoming call. If the calling party sends a CNG signal, or if neither a CNG signal nor audio is sent for a certain period of time, the telephone line l is connected to the facsimile machine 5, the facsimile machine 5 is activated, and a predetermined I am trying to execute facsimile communication.

In this way, the signal received from the telephone line L determines whether the purpose of the calling party is a telephone call or a facsimile transmission. Now, calls can be automatically received without operator intervention.

By the way, in one or more embodiments, each circuit for distinguishing between a telephone call and a facsimile communication is provided separately from the facsimile machine i5.
By installing a circuit that detects signals and audio signals,
A facsimile machine can be equipped with similar functionality.

FIG. 4 shows an embodiment of such a facsimile machine. In FIG. 1, a telephone line 101 is connected to a common terminal C of a switching circuit 102 and a calling signal detection circuit 103. Contact a of the switching circuit 102 is connected to the telephone 10.
4, the contacts are each connected to one end of one winding of the transformer 105, and the other end of the winding is grounded. The telephone 104 also includes an off-hook detection circuit 106,
A ringing circuit lOff is connected. The ringing circuit 107 causes the bell of the telephone 104 to ring.

One end of the other winding of the transformer 105 is connected to the modem circuit 10.
8 and the CNG/audio detection section 109, and the other end is grounded.

The modem circuit 108 is connected to the image processing unit 111 via the communication control unit 11O.
Reference numeral 11 reads original images, records received images, etc., and a communication control unit 110 executes predetermined facsimile communication via the modem circuit 108.

The CNG/voice detection unit 109 is for detecting a CNG signal from the destination facsimile machine and the voice of the destination operator. In this CNG/audio detection section 109, the input of the low-pass filter 109a is once connected to the modem circuit 108 side winding of the transformer 105, and its output is connected to the 1100Hz detector 109b, the 1100Hz detector 109b, and the unspecified signal detector 109c. connected to each input.

The low-pass filter 1098 passes signals below 3400 Hz, which is the transmission band of the telephone line.
The 1100 Hz detector 109b detects a signal of 1100 Hz, which is the frequency of the CNG signal. Further, the unspecified signal detector 109c detects when some signal such as the caller's voice is input at a certain level or higher.

Then, the system control unit 112 controls the calling signal detection circuit 1
03. Based on the detection results of the off-hook detection circuit 106, CNG/audio detection section 109, etc., the switching circuit 102, ringing circuit 107, communication control section 110, and image processing section 1
11, etc., to execute predetermined operations of this facsimile machine.

With the above configuration, during standby without communication, the switching circuit 102 is connected to the contact a side.

In this state, when a call arrives on the telephone line 101, as shown in FIG. 5, the ringing signal detection circuit 103 detects the ringing signal (Y in process 201), the switching circuit 102 is switched to the contact state, and the line is closed. is connected (process 202).

Next, it is detected for a certain period of time whether any signal is transmitted from the line (process 203, process 204 from process 203 N, process 203 from process 204 N).

Here, if some signal is detected (Y in process 203)
), then the 1100 Hz component of the signal is detected (process 205), and when the 1100 Hz component is detected (Y in process 205), it is determined whether the detection state continues for 500 m5 (process 206, Processing 206 N
(process 205). Furthermore, the detection state is 500m5
When the detection continues (Y in process 206), it is determined whether it is no longer detected (process 207).

By the way, if the calling side is a facsimile machine of a type that sends out a CNG signal, then after the above-mentioned call is received, the calling side will send out a CNG signal. This CNG signal is 1
This is a tonal signal that continues for 500m5 at 100Hz.

Therefore, in this case, reception of the signal is detected (process 203
After the 1100 Hz component continues for 500 m5 (Y in process 206), it is no longer detected (process 207).
Y).

In this case, next, the 1 communication control unit 110 is activated (processing 2
08), whereby predetermined facsimile communication is executed (process 209). When the execution is completed, the switching circuit 102 is switched to the contact a side, and the closed line is disconnected (process 210).

Next, let us assume that the calling party is a person whose purpose is to make a phone call.

Then, when the calling party speaks out to request a response from the called party, a voice signal is sent out.

However, in this case, the 1100Hz component of the audio signal is
It will not continue for 00m5.

Therefore, in this case, the audio signal is detected (process 203
(Y), the 1100 Hz component is not detected under the above conditions (N in process 205), so next, ringing is performed by the bell of the telephone 104 (process 211).

The operator hears the ringing sound and turns on the telephone 10.
4 off the hook.

When telephone 104 is taken off-hook (Y in process 212)
, the switching circuit 102 is switched to the contact a side (process 213).

As a result, the operator makes a call with the other party (process 214), and when the call ends and the telephone 104 goes on-hook, one line is disconnected (process 210).

On the other hand, if no signal is received within a certain period of time after receiving the call (Y in process 204), the communication control unit 110 is activated (process 208).

As a result, if the calling party is a facsimile device of a type that does not send CNG signals, predetermined facsimile communication is executed (proceed to step 208).

As described above, in this embodiment, the CNG/audio detection unit 109 is provided in a normal facsimile machine, and the 1100H
CNG signals are determined based on whether a signal with a specific frequency called z is detected for a certain period of time.

When a CNG signal is received, it determines that the other party is a facsimile machine and performs the specified communication. However, if the CNG signal cannot be received or only a signal of an unspecified frequency such as voice is detected. , outputs a ringing sound to summon an operator for a call.

As a result, facsimile communication can be performed by automatic incoming calls without operator intervention, similar to the previous embodiment.

In the above embodiments, the calling party notifies the user of the purpose of the call by speaking, but if the calling party uses a button phone, the calling party should press the dial button and When the calling side detects the corresponding PB multiple signal, it can also determine that the call is intended for a call.

In addition, telephone lines have been switched and connected to telephones and facsimile devices to perform telephone calls and facsimile communications, but communication systems that switch and connect to personal computers and other data transmission devices equipped with modems are also It goes without saying that the invention is equally applicable.

[Effects of the Invention] As described above, according to the present invention, it is determined whether the purpose of the calling party is a telephone call or data transmission based on the signal sent from the calling party, and the The system outputs a ringing sound to notify the operator of an incoming call, while in the case of data transmission, the telephone line is connected to the data transmission equipment side to execute the data transmission, so calls can be automatically received without operator intervention. This enables data transmission.

[Brief explanation of the drawing]

FIG. 1 is a block configuration diagram of a communication system according to an embodiment of the present invention, FIG. 2 is a flowchart showing the incoming call operation of the communication system, and FIG.
FIG. 4 is a block diagram of a facsimile machine according to another embodiment of the present invention, and FIG. 5 is a flowchart showing the call receiving operation of the facsimile machine according to another embodiment of the present invention. . 1, 101... telephone line, 2, 4, 6, 102...
・Switching circuit, 3...Telephone, 5...Facsimile device, 7,103...Call signal detection circuit, 8...Voice response device, 9...CNG detection circuit, 1O...Voice detection Circuit, 11, 106... Off-hook detection circuit, 12
．． 13.14... Switching control circuit, 15... FAX startup control circuit, -16... Ringing sound output circuit, 17
... Speaker, 18 ... Control circuit, 104 ... Telephone, 105 ... Transformer, 107 ... Ringing circuit, 108 ... Modem circuit, 109 ... CNG
Audio detection section, 110... Communication control section, 111... Image processing section, 112... System control section. Ctsu, 57~ Fig. 2, Fig. 3) Did! two

Claims (2)

[Claims] (1) In a communication system in which a telephone line is switched and connected to a telephone set and a data transmission device to perform telephone calls and data transmission, an incoming call detection means for detecting a ringing signal from the telephone line, and an incoming call detection means for detecting a ringing signal from the telephone line, and a a voice response means for sending a voice message to a telephone line; a discriminating means for determining whether the purpose of the calling party is a telephone call or data transmission based on a signal sent from the calling party; A ringing means for outputting a ringing sound to notify an incoming call when the purpose of the call is a call, and a control means for connecting the telephone line to the data transmission device side and executing the data transmission when the purpose of the call is for data transmission. A communication system characterized by: (2) In a facsimile machine equipped with a telephone that performs telephone calls and facsimile communications by switching and connecting a telephone line to the telephone and the facsimile machine, an incoming call detection means for detecting a ringing signal from the telephone line; ringing means for outputting a ringing sound to notify of an incoming call when the purpose of the telephone is a telephone call; unspecified signal detection means for detecting that a signal of an unspecified frequency is received from the telephone line which is closed due to the incoming call; specific signal detection means for detecting that a signal of a specific frequency is received from the line; destination determination means for determining that the calling party is a facsimile device when the signal of the specific frequency is detected for a certain period of time; facsimile communication execution means that executes facsimile communication when it is determined that the calling party is a facsimile machine; and outputting the ringing sound when only the signal of the unspecified frequency is detected or if it is not determined that the calling party is a facsimile machine; 1. A facsimile device comprising: calling means.