JP3679927B2 - Dial tone verification method and facsimile machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a facsimile machine.
[0002]
[Prior art]
In general, when transmitting the contents of a document with a facsimile machine, place the document on the document table of the facsimile machine, lift the handset, enter the number of the other party, call the other party, and press the start button. Is switched from the telephone to the facsimile machine, and a dial tone is transmitted from the exchange to the facsimile machine.
[0003]
The facsimile apparatus verifies the duration of the dial tone, enters a call operation after a predetermined time, which is a condition for data transmission, and transmits the document contents to the other party.
[0004]
The facsimile apparatus converts the dial tone received from the exchange into a signal of 1 (the dial tone continues) and 0 (the dial tone is interrupted) by a modem tone detector, and stores it in a register (not shown). The stored tone is verified by a central processing unit (hereinafter referred to as CPU).
[0005]
The CPU verifies the on-time when the dial tone continues and the off-time when the dial tone continues, and continues the verification if the off-time is less than the off-set value, which is a preset comparison value. When it reaches, the call operation starts. If the off time exceeds the off set value, repeat the test.
[0006]
By the way, in other countries, when the line is congested, the exchange sends a dial tone called a routing tone that repeats a predetermined on time and off time, for example, an on time and off time of 50 ms, instead of a dial tone. Thus, the facsimile apparatus is prevented from entering a call operation. When the routing tone is output from the tone detector, the on time is 64 to 90 ms and the off time is 10 to 36 ms according to the standard level -10 to -27 dBm.
[0007]
In addition, in foreign countries, there is an instantaneous disconnection standard in which a calling operation should not be started when an off time exceeding 30 ms occurs after a dial tone output from an exchange continues for one second. When the off time 30 ms is output from the tone detector, the off time is 0 to 35 ms according to the standard level −10 to −27 dBm.
[0008]
[Problems to be solved by the invention]
In the conventional facsimile apparatus, the verification is started by receiving the dial tone from the exchange, and the verification is continued if the off time is equal to or less than the off set value. If it is set to 40 ms, which is a little longer than the above, and the verification is continued for the off time of 0 to 35 ms of the instantaneous interruption standard and the calling operation is started, the verification is also performed for the off time of the routing tone of 10 to 36 ms. As a result, there is a problem that the call operation starts when the predetermined verification time is reached.
[0009]
The present invention provides a facsimile apparatus which enters a call operation when the off-time of the dial tone from the exchange is within the instantaneous interruption standard, and does not enter the call operation when the dial tone is a routing tone. It is intended to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above-mentioned purpose, the on-time and the off-time when the dial tone transmitted from the exchange continues are detected and the dial tone is verified, and the off time is equal to or greater than the preset off-set value. cancel the call if it is, it continues with the off if time is less than the off-set value test, in the facsimile apparatus to enter the calling operation upon reaching a predetermined check time routing tone off time A shorter first off setting value, an on setting value longer than the on time of the routing tone , a second off setting value longer than the first off setting value and longer than the off time determined to be an instantaneous interruption, The first off-set value is set as the off-set value before call verification, and the on-time is set to on-time by comparing the on-time with the on-set value. Value exceeded And a off-set value updating means for updating the OFF setting value to the second off-set value when.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the element common to each drawing.
FIG. 1 is a block diagram showing a main part of the present invention according to an embodiment. The facsimile apparatus 1 and the telephone set 2 are connected to a line 5 via a changeover switch 4 of a network control unit 3 (hereinafter referred to as NCU 3).
[0012]
The facsimile machine 1 includes a central processing unit 6 (hereinafter referred to as CPU 6), a memory 7, and a modem 8. The modem 8 converts an analog signal transmitted through the line 5 into a digital signal, stores 1 in the register 9 when the dial tone continues, and stores it in the register 9 when the dial tone is interrupted. A tone detector 10 for storing 0 is provided.
[0013]
The memory 7 stores an on-set value 11 to be compared with the first on-time after the start of the test, an off-set value 12 to be compared with the off-time, a second off-set value 13 for updating the off-set value 12, and the test. Stored is a test value 14 which is a time from the start of the call to the start of the call operation.
[0014]
The CPU 6 is provided with an off-time update unit 15, an examination stop unit 16, a calling unit 17, and a timer 18. The timer 18 includes a timer 18a for measuring the on time and a timer 18b for measuring the off time. The timer 18a for measuring the on time is started at the start of the test, and the timer 18b for measuring the off time is stored in the register 9. It is reset every time 0 is stored.
[0015]
When 1 is stored in the register 9 of the tone detector 10, the off-time updating means 15 compares the output of the timer 18a for measuring the on-time with the on-set value 11 of the memory 7 and outputs the timer 18a. When the ON value reaches the ON setting value 11, the OFF setting value 12 is updated to the second OFF setting value 13.
[0016]
When 0 is stored in the register 9 of the tone detector 10, the test canceling means 16 compares the output of the timer 18b for measuring the off time with the off set value 12 of the memory 7 and outputs the timer 18b. When the off set value 12 is reached, the test is stopped.
[0017]
The calling means 17 compares the output of the timer 18a with the test value 14 of the memory 7 and enters the call operation when the output of the timer 18a reaches the test value 14.
[0018]
FIG. 2 is a waveform diagram of a routing tone output from the tone detector of the modem. In the specification of the routing tone, the on time and the off time are 50 ms, respectively, but when output from the tone detector, the on time is 64 to 90 ms according to the standard level -10 to -27 dBm, and the off time is 10 to 36 ms.
[0019]
FIG. 3 is a waveform diagram of instantaneous interruption output from the tone detector of the modem. In the specification of instantaneous interruption in other countries, the onset time of the dial tone output from the exchange is continued for 1 second, and then the off time of 30 ms occurs as an instantaneous interruption, but it is standard when it is output from the tone detector. Depending on the level -10 to -27 dBm, the off time is 0 to 35 ms.
[0020]
FIG. 4 is a flowchart showing the operation of the present invention according to the embodiment.
[0021]
In step S1, the CPU 6 sets whether the document is set on the document table of the facsimile apparatus, raises the handset of the telephone 2, inputs the number of the other party, calls the other party, and then presses a start button (not shown). I have a sense.
[0022]
In step S2, the CPU 6 senses whether the NCU 3 switches the changeover switch 4, the connection with the line 5 is switched from the telephone set 2 to the facsimile apparatus 1, and a dial tone is transmitted from the exchange (not shown) to the facsimile apparatus 1. doing.
[0023]
In step S3, the CPU 6 starts to verify the dial tone, and sets, for example, 5 ms and 2 seconds as the OFF setting value 12 and the verification value 14 in the memory 7. Further, the ON set value 11 and the second OFF set value 13, respectively, are 140 ms shorter than the ON time of the routing tone, shorter than 1 second of the instantaneous interruption standard, and OFF time 0 to 35 ms of the instantaneous interruption standard. Set 40ms which is slightly over.
[0024]
In step S4, the CPU 6 checks the on-time in which 1 is stored in the register 9 of the tone detector 10 by the timer 18a. If the on-time has reached 140 ms, the CPU 6 branches to step S5. In this case, the process branches to step S9. In step S5, the CPU 6 reads the second off setting value 13 and updates the off setting value 12 from 5 ms to 40 ms.
[0025]
In step S6, the CPU 6 checks the off time in which 0 is stored in the register 9 of the tone detector 10 by the timer 18b. If the off time exceeds 40 ms, the CPU 6 branches to step S1. Branches to step S7.
[0026]
In step S7, the CPU 6 checks whether or not the on-time has reached 2 seconds by the timer 18a. If it has reached 2 seconds, the CPU 6 branches to step S8 and proceeds to the calling operation in step S8. If the on-time has not reached 2 seconds, the process branches to step S6.
[0027]
Further, when branching from step S4 to step S9, the CPU 6 checks by the timer 18b whether or not the off time has exceeded 5 ms. If it has exceeded, the CPU 6 branches to step S1, and if not, the process goes to step S10. Branch.
[0028]
In step S10, the CPU 6 checks by the timer 18a whether or not the on-time has reached 2 seconds. If the on-time has reached 2 seconds, the CPU 6 branches to step S8. If not, the CPU 6 proceeds to step S4. Branch.
[0029]
That is, when the on-time continues for 2 seconds, it is determined that the dial tone is a dial tone, the call operation is started, and the document content is transmitted to the other party. If the off time exceeds 5 ms before the on time reaches 140 ms, the procedure returns to step S1 and the test is repeated.
[0030]
If the off time exceeds 40 ms after the on time reaches 140 ms and the off set value 12 is updated from 5 ms to 40 ms, the procedure returns to step S1 and the test is repeated.
[0031]
If the dial tone is a routing tone, the first on-time is 64 to 90 ms when output from the tone detector, as shown in FIG. Since the time is 10 to 36 ms, it is longer than 5 ms, so that the test is re-executed and the call operation is not started.
[0032]
In addition, for the instantaneous interruption standard, since the first on-time has passed 1 second exceeding 140 ms, the off-time is updated to 40 ms which is longer than the instantaneous interruption off-time 0 to 35 ms. If the off time is 0 to 35 ms or less, the verification is continued. After the on time continues for 2 seconds, the call operation is started and the document content is transmitted to the other party.
[0033]
Therefore, if the dial tone received from the exchange is a routing tone, the call operation is not started, and if the off time of the dial tone is within the instantaneous interruption standard, the call operation is started.
[0034]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
The dial tone transmitted from the exchange detects the on time when the dial tone continues and the off time when the dial tone stops, and verifies the dial tone, and if the off time is greater than or equal to the preset off set value, the call is made. If the off time is less than or equal to the off set value, the verification is continued. When the predetermined verification time is reached, the first off set value that is shorter than the off time of the routing tone in the facsimile apparatus that enters the calling operation. Storage means for storing an ON setting value longer than the ON time of the routing tone, and a second OFF setting value longer than the first OFF setting value and longer than the OFF time determined to be instantaneous interruption , Before call verification, set the first OFF setting value as the OFF setting value , start dial tone verification, compare ON time with ON setting value, and OFF setting value when ON time exceeds ON setting value To the second By having the OFF setting value updating means for updating the set value, if the off time of the dial tone in the instantaneous standard enters the calling operation, if a dial tone routing tone to the calling operation It can be prevented from entering.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a main part of the present invention according to an embodiment.
FIG. 2 is a waveform diagram of a routing tone output from a tone detector of a modem.
FIG. 3 is a waveform diagram of instantaneous interruption output from a tone detector of a modem.
FIG. 4 is a flowchart showing the operation of the present invention according to the embodiment.
[Explanation of symbols]
1 Facsimile device 3 NCU
6 CPU
7 Memory 8 Modem 10 Tone detector

Claims (2)

After being connected to the line, the dial tone transmitted from the switchboard is detected for the on time and the off time when the dial tone continues, and the dial tone is verified, and the off time exceeds the preset off set value. In the call verification method, the call is stopped if it is, the verification is continued if the off time is equal to or less than the off set value, and the call operation is started when the predetermined verification time is reached ,
Prior to call verification, a first off setting value shorter than the off time of the routing tone is set as the off setting value,
Before starting the dial tone verification and detecting an on time longer than the on time of the routing tone, if the off time exceeding the first off setting value is detected, the call operation is stopped.
When an on-time longer than the on-time of the routing tone is detected, the off-set value is updated to a second off-set value that is longer than the off-time determined to be instantaneous interruption and longer than the first off-set value. A dial tone verification method characterized by the above. After connecting to the line, the dial tone transmitted from the exchange detects the on time when the dial tone continues and the off time when the dial tone stops, and verifies the dial tone, and the off time is greater than or equal to the preset off set value. In the facsimile apparatus, the call is stopped in some cases, the verification is continued if the off time is equal to or less than the off set value, and the call operation is started when the predetermined verification time is reached .
A first off setting that is shorter than the routing tone off time;
An on setting that is longer than the on time of the routing tone,
Storage means for storing a second off setting value that is longer than the off time determined to be instantaneous interruption and longer than the first off setting value;
Before calling test by setting the first off-set value as the off set value,
OFF setting value to start test tone by comparing the on-set value and on-time on-time to update the off set value when it exceeds the ON setting value to the second off-setting value update And a facsimile apparatus.

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