JP2871226B2 - Automatic telephone / facsimile receiving method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically receiving an incoming call in a facsimile apparatus sharing one line with a telephone.

[0002]

2. Description of the Related Art There are two types of facsimile machines connected to a telephone line and used as an incoming call system: an automatic incoming call system and a manual incoming call system. It has become. The automatic incoming call method is often selected when the line is used exclusively for facsimile, and the manual incoming call method is often selected when the line is shared with a telephone.

[0003] A procedure at the time of an incoming call of a facsimile apparatus set to automatic incoming call will be described. When there is an incoming call, the facsimile apparatus generates a ringing tone and counts the ringing signal. With a predetermined number of ringing tones, the line control unit closes the DC circuit, switches the line to the modem side, and sets the facsimile signal. Is received. The number of ringing tones is usually about two, and the exchange starts counting time from the time the circuit is closed and enters a billing state.

When the circuit is closed, the calling side sends a calling tone CNG (1100 Hz, repetition of 0.5 seconds on, 3 seconds off) for identifying a facsimile call. When this is detected by the called side, the called side identifies the called terminal identification signal (CED) (2100).
Hz, 2.6-4 seconds) and sends out a digital identification (DIS) signal. The calling side sends a digital command (DCS) signal as a response thereto, which determines transmission of the calling side and reception of the called side. If there is no response from the calling side to the sending of the DIS from the called side, the called side repeats the sending of the DIS, for example, every three seconds.
If there is no response within a certain time, the line is disconnected.
This time is about 35 to 45 seconds. After the line is closed,
Even if CNG is not sent from the calling side, the called side
The CED is sent out after 1.8 to 2.5 seconds.

In such a conventional automatic reception procedure, when the calling side is a telephone, no CNG is transmitted from the calling side even if the line is closed. The called party simply sends out the DIS repeatedly to request the facsimile procedure,
After a certain time has elapsed, the called party disconnects the line. Therefore, facsimile machines set for automatic reception
You cannot make calls. Moreover, on the called side,
The called party does not pick up the handset because it cannot recognize that it is a telephone. During this time, the calling party will hear a loud DIS tone and will be charged.

[0006] In the case of facsimile reception by the manual method, since the line is connected in the telephone mode, there is no problem in receiving a telephone call from the calling side. When a request for facsimile transmission from the calling party is transmitted during a call, the called party
By switching to the facsimile mode, the facsimile procedure is executed and facsimile reception is performed.
However, if the called party cannot go off-hook due to absence or the like, it cannot receive a facsimile from the calling party. The called side cannot cope with a facsimile apparatus in which the calling side is set to an automatic transmission mode such as broadcast transmission or time-specified transmission.

[0007] With the spread of facsimile, facsimile and telephone are often shared by a single line. For incoming facsimile,
There is a problem that cannot be addressed sufficiently.

In order to solve this problem, a method is known in which the incoming call is a telephone call or a data communication such as a facsimile, and the called party responds to either of them.

In the automatic incoming call system described in Japanese Patent Application Laid-Open No. Sho 61-262350, when there is an incoming call, the called party closes the line, sends a message, and makes a communication / telephone decision. If no identification signal is transmitted from the calling side within a predetermined time, it is determined that the call is a telephone, and a pseudo ringback tone is transmitted to the calling side and a buzzer is output. According to this method, if there is an identification signal during the monitoring period, the mode shifts to the communication mode, and if the identification signal is not obtained, that is, a buzzer sounds for an incoming call, and the calling side Since a ringback tone is transmitted, it is possible to respond to a telephone call.

[0010] However, on the receiving side, after the monitoring period has elapsed, it is determined that the incoming call is a telephone, and the mode is shifted to the telephone mode. Therefore, the incoming call is not a communication, that is, the identification signal is not sent. Sufficient time is required before confirmation. Therefore, it is necessary to take a sufficient monitoring period, and a useless period becomes long. In addition, the calling side is in a state of silence until the pseudo ringback tone is transmitted after the message is heard, and there is also a problem that the calling side becomes uneasy.

On the other hand, Japanese Patent Application Laid-Open No. 63-148750
In the telephone / facsimile switching method described in Japanese Patent Application Laid-Open Publication No. H11-27163, when a call is received, a pseudo ring-back tone is immediately transmitted from the called side and CNG from the calling side is monitored. If CNG is not detected during the monitoring period, it is determined that the call is a telephone call, a pseudo ringback tone is continued, a buzzer sound is generated, and an incoming call is notified.

In this method, since the pseudo ring-back tone continues during the monitoring period, the above-mentioned problem does not accompany the anxiety, but the problem that the monitoring period has to be taken sufficiently is solved. Not.

Further, when the calling side transmits by facsimile of the manual transmission method, in the above-mentioned method, if the called side cannot talk due to absence or the like, the transmission cannot be performed unless switching to facsimile transmission during the monitoring period. From this viewpoint as well, there is a problem that the monitoring period must be extended.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can be applied to both telephone and facsimile, and can shorten a monitoring period before generating a pseudo ringing tone. It is another object of the present invention to realize a facsimile apparatus that can pick up a telephone even during a monitoring period and that can handle a manually transmitted facsimile.

[0015]

According to a first aspect of the present invention, there is provided an automatic telephone / facsimile receiving method in which a line is closed in a state in which a ringing tone is stopped for an incoming call. Then, after transmitting the first message, a pseudo ring-back tone is transmitted for a first predetermined period. In parallel with this, a facsimile identification signal is monitored, and the pseudo ring-back tone is transmitted within the first predetermined period. A pseudo ringing tone is generated after a lapse of a second predetermined period after the start of tone transmission, and the first predetermined period is determined by counting the pseudo ringback tone. According to a second aspect of the present invention, in the telephone / facsimile automatic incoming call receiving method according to the first aspect, after the first predetermined time has elapsed, the generation of the pseudo call is stopped, and the second message is generated. It sends the over-di, then, is characterized in that to switch the facsimile reception mode.

The monitoring of the facsimile identification signal may be performed during a break period of the pseudo ringback tone.

[0017]

FIG. 2 is a schematic block diagram of a facsimile apparatus applied to an embodiment of an automatic facsimile receiving method according to the present invention. In the figure, 1 is a line, 2 is a line controller, 3 is CN
G detection unit, 4 is a pseudo ringback tone generation unit, 5 is a modem, 6 is a voice transmission unit, 7 is an attached telephone, 8 is a child telephone, 9 is a pseudo bell sound generation unit, 10 is an operation unit, and 11 is an original reading , 12 is a recording unit, and 13 is a main control unit (CPU) responsible for overall control of these units.

FIG. 3 is an explanatory view of the passage of time in an embodiment of the automatic facsimile receiving method according to the present invention.
The numbers in the figure indicate the time in units of seconds, but this value is merely an example and is not limited to this. This will be described with reference to FIG.

When an incoming call is received, a 16-Hz DC intermittent signal is received from the line 1 as a ring tone, but when the facsimile apparatus is set to the automatic incoming call mode,
The ringing sound of the attached telephone 7 and the sub telephone 8 is prevented from sounding. Therefore, the surroundings do not need to hear unnecessary bell sounds. When a certain number of ring tones are detected, for example, two times, the line control unit 2 closes the DC circuit of the line. As a result, the exchange starts charging.

Next, the voice transmitting unit 6 sends an R (not shown)
A voice 1 which is a first voice message such as "A call will be made, please wait as it is" is sent out using a synthetic sound based on data stored in the AM or the like. If the calling party is a telephone, the incoming call can be confirmed by this, and it can be recognized that charging has started. When the transmission of the first message is completed, a signal from the pseudo ringback tone generator 4 is transmitted from the line controller 2 to the line 1 in order to notify the calling side of the calling state.
In this embodiment, the pseudo ringback tone is the same pattern as that of the ring tone and is transmitted for one second and cut off for two seconds. at the same time,
CNG monitoring is started.

For example, when 10 seconds elapse, the pseudo-bell sound generating section 9 is activated, and the generated pseudo-ring sounds as a ringing sound in the attached telephone 7 and the sub telephone 8. The pseudo bell sound generates this as a low frequency signal,
A speaker may be provided on the facsimile main body side and the sub telephone side to make sound. Alternatively, it may be generated as a DC intermittent signal, and the bells provided on the attached telephone and the sub telephone may be sounded. During the period when the operator is ringing with the pseudo bell sound, the transmission of the pseudo ringback tone and the monitoring of CNG are performed in parallel. Therefore, even if the detection of CNG fails during the 10-second period described above, CNG monitoring is not performed until the handset of the attached telephone 7 or the sub telephone 8 is picked up during the period in which the pseudo bell sound is generated. It will be continued. The period during which the pseudo bell sound is generated is, for example, 10 seconds.

In this embodiment, CNG detection by the CNG detection unit 3 is periodically performed during a period in which a pseudo ringback tone is generated. That is, during the period when the pseudo ringback tone is cut off, the CNG detection unit 3
As a result, CNG is detected. CNG is 0.5
In this embodiment, the pseudo-ringback tone is transmitted for 1 second and transmitted for 2 seconds, whereas 0.5 seconds, which is the transmission period of CNG, is the detection period. Even if the time is off from the time of the interruption of the pseudo ringback tone, the detection cycle always matches the detection cycle in several cycles, and CNG can be detected. If CNG is detected, it is determined that the incoming call is from a facsimile, and the main control unit 13
Immediately stops generating the pseudo ringback tone,
Jump to the CED / DIS transmission procedure. Therefore, the transmission of voice 2 described later is not performed. If there is a DCS response from the calling side, the facsimile reception procedure can be started. If the DCS cannot be received, a line disconnect command DCN is sent out after about 40 seconds have elapsed to disconnect the line.

When the incoming call is a telephone call, the operator answers while the pseudo-bell sound is being repeated and raises the handset of the attached telephone 7 or the sub telephone 8, and the off-hook is detected, and the line is detected. The control unit 2 connects the off-hook handset to the line 1 to enable a call with the calling side. The generation of the pseudo ringback tone and the pseudo bell sound is stopped.

In this embodiment, after the voice 1 is transmitted, when the handset of the attached telephone 7 or the sub telephone 8 is picked up, the incoming call is switched to the telephone. However, if there is an incoming call, the bell does not sound. Therefore, it is preferable to provide a display unit such as an LED on the facsimile main body side and the handset side. When a call is made from the facsimile side or the like, it is possible to determine that a call is being received by looking at the display unit, and it is possible to prevent the operator from inadvertently making a call or facsimile during the reception operation. In addition, if the user looks at the display unit and goes off-hook before the generation of the pseudo-bell sound, the telephone can be switched to the telephone. If the incoming call is a facsimile, it is possible to shift to the facsimile reception procedure by manually switching to the facsimile mode when CNG is heard.

In the description of the embodiment with reference to FIG. 3, the time from the start of the transmission of the pseudo ringback tone to the generation of the pseudo bell sound is 10 seconds, and the period of generating the pseudo bell sound is 10 seconds. Accordingly, in FIG. 3, the transmission period of the pseudo ringback tone is 20 seconds, but in the present invention, the transmission period of the pseudo ringback tone is set by the number of pseudo ringback tones. The period from the start of the transmission of the pseudo ringback tone to the generation of the pseudo bell sound may be set by the number of pseudo ringback tones. For example, the number of occurrences of the pseudo ringback tone is 6, 8, 1
The operator can set a dip switch from 0 or 12 times and set the number of pseudo ringback tones before generating a pseudo bell sound to any of three or four times. You can adjust how long you can.

When the number of occurrences of the pseudo ringback tone reaches the set number due to the absence of the operator or the like, a second voice message is sent from the voice transmitting unit 6 to say "I am not near. Fax is called P. Please transmit after the sound. " If the calling party is a telephone, the caller will hear this and know that he / she is out of the office, so that further charging can be prevented by hanging up the telephone here.

After the transmission of voice 2, the facsimile apparatus
Set to facsimile reception mode. If the calling side is a facsimile of manual transmission, after hearing the second message, it is sufficient to hear the CED subsequently transmitted to the calling side followed by the DIS beep and then press the send button. As a result, a facsimile from the calling side can be received.

If there is no facsimile transmission from the calling side, the transmission of CED / DIS is repeated, and when about 40 seconds have elapsed, a line disconnection command DCN is transmitted to disconnect the line.

In this embodiment, the CNG is monitored by:
It was performed during the period when the pseudo ringback tone was turned off. Therefore, when monitoring CNG, the pseudo ringback tone is not transmitted to the line, so that CNG can be detected without being affected by harmonics of the pseudo ringback tone. CNG may be detected even during transmission of the pseudo ringback tone by using a determination unit that is less likely to be affected by harmonics of the pseudo ringback tone.

FIG. 1 is a flow chart for explaining an embodiment of the automatic facsimile receiving method of the present invention described with reference to FIG.

The flow starts with an incoming call. Ste
At p1, the DC circuit of the line is closed, and at Step 2, the above-mentioned first message of voice 1 is transmitted. Then S
Step 3 and Step 4 are looped, and the CN from the calling side is
G is detected. If CNG is not detected within 2 seconds, the process shifts from Step 5 to Step 6, and a pseudo ringback tone is transmitted. One second later, the pseudo ringback tone is turned off. Until the pseudo bell sound is generated,
Since the flag of the pseudo bell sound is “0”, the process moves from Step 8 to Step 10 and loops to Step 3, where CN
The detection of G and the transmission of the pseudo ringback tone are repeated.

If CNG is detected, S3 to S
The process proceeds to step 13 and step 14, and the CED is transmitted.
At Step 15, the DIS is sent. As will be described later, when a pseudo bell sound is generated via Step 9, this is stopped at Step 13. Then St
In step ep16, the DCS from the calling side is received, and in step 19
Then, the facsimile reception procedure is performed. If the DCS cannot be received, Step 17 to Step 15
And repeats the transmission of DIS, and waits for DCS.
In this embodiment, if a DCS response is not obtained within about 40 seconds within a predetermined time, Step 17 to Step 1
In step 8, the DCN is transmitted to disconnect the line.

When CNG cannot be detected and the number of pseudo ringback tones reaches the set number m, for example, three, the process proceeds from Step 8 to Step 9 to generate a pseudo bell sound and generate a pseudo bell sound. The flag is set to “1”. Thereafter, since the flag of the pseudo bell sound is “1”,
From p3 to Step7, move to Step10, and
Loop to p3 and repeat CNG detection and pseudo ringback tone transmission.

After the generation of the pseudo bell sound or before the generation of the pseudo bell sound as described above, Steps 3 to
If the attached telephone or the sub telephone is off-hook during the loop of the detection of CNG and the repetition of the pseudo ringback tone in Step 10, Step 10 to Step
Then, if a pseudo bell sound has been generated, this is stopped, and in Step 12, the line is switched to the off-hook telephone side, and a call is made. During a call,
If the calling party requests a facsimile transmission,
The facsimile apparatus can switch to the facsimile reception mode and perform reception by operating a button on the operation unit.

During the loop of the detection of CNG and the repetition of the pseudo ringback tone, when the count value from the beginning of the pseudo ringback tone reaches the set number n, for example, six, the process shifts from Step 5 to Step 20. , The pseudo bell sound is stopped, the pseudo bell sound flag is set to “0”, and S
At step 21, the above-mentioned second message of voice 2 is transmitted, the facsimile apparatus is switched to the reception mode,
Proceeding to Step 14, the process proceeds to the facsimile procedure described above.

The monitoring of the facsimile identification signal may be performed immediately after the line is closed. Also, CNG
If is not detected, the generation of the pseudo bell sound and the monitoring of the facsimile identification signal may be extended to after the transmission of the second message. In any of these cases, if the attached telephone or the sub telephone is off-hook after receiving a call, a telephone call becomes possible, and if CNG is detected, the mode is shifted to the facsimile reception mode.

[0037]

As is apparent from the above description, according to the present invention, when a line is closed, a facsimile identification signal is monitored and a pseudo ringing tone is generated after a predetermined time, so that the telephone and the telephone are not generated. It can respond to any facsimile, even during the monitoring period of the facsimile identification signal,
You can pick up the phone. Further, it is possible to cope with a manually transmitted facsimile even if an operator is absent, and there is an effect that an automatic receiving method of the called facsimile apparatus which does not impose an unnecessary burden on the calling side can be realized.

[Brief description of the drawings]

FIG. 1 is a flowchart of an embodiment of an automatic facsimile receiving method according to the present invention.

FIG. 2 is a schematic configuration diagram of a facsimile apparatus applied to an embodiment of an automatic facsimile receiving method according to the present invention.

FIG. 3 is an explanatory diagram of the passage of time in an embodiment of an automatic facsimile receiving method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Line 2 Line control part 3 CNG detection part 4 Pseudo ringback tone generation part 6 Voice transmission part 7 Attached telephone 8 Sub telephone 9 Pseudo bell sound generation part 13 Main control part (CPU)

Claims (2)

(57) [Claims] 1. An automatic telephone / facsimile incoming call receiving method, wherein a line is closed in a state where a ringing tone is stopped for an incoming call, a first message is transmitted, and then a pseudo ringback tone is transmitted to the first incoming call. And a facsimile identification signal is monitored in parallel with the first period.
A pseudo ringing tone is generated after a lapse of a second predetermined period after the transmission of the pseudo ring back tone is started within the predetermined period of time, and the pseudo ring back tone is counted during the first predetermined period. A telephone / facsimile automatic call receiving method characterized by: 2. After the first predetermined time has elapsed, the generation of the pseudo call is stopped, and a second message is transmitted;
2. The method according to claim 1, further comprising switching to a facsimile reception mode.