JP3038195B1 - Method of determining presence / absence of polarity reversal of communication line and additional device for telephone terminal - Google Patents

Abstract

The present invention provides an additional device for a telephone which automatically determines the presence / absence of polarity reversal of a communication line and automatically switches a line connection mode, and a method of determining the presence / absence of polarity reversal of a communication line. SOLUTION: An incoming call waits in an idle state, and the idle state is maintained. When an incoming call is detected, transition is made simultaneously to incoming call processing and determination of the presence or absence of polarity inversion. When an incoming call is detected, polarity inversion of the incoming call is determined, and a counter with polarity inversion and a counter without polarity inversion are added. The polarity inversion of the connection line is determined based on the difference between the counter value with polarity inversion and the counter value without polarity inversion. The timing of idle return from abandonment of a call is set to the reversion of polarity inversion on a line with polarity inversion, and after an elapse of an arbitrary time from ringer stop on a line without polarity inversion. Before abandoning the incoming call, the process shifts to the incoming call process in response to the incoming call, and if there is no response, the incoming call process is maintained until the call is abandoned. When the incoming call is abandoned, idle return processing of the abandoned call is performed based on the determination of the line with / without polarity reversal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an additional apparatus for a telephone terminal connected to a communication terminal such as a telephone, and a method for determining the presence / absence of polarity reversal of the communication line.

[0002]

2. Description of the Related Art In a general line, an exchange controls the polarity of a line voltage so that when a telephone call is made and a telephone receiver is picked up and answered, the DC voltage on the transmitting side is inverted. Also, in the case of an incoming call, polarity control is performed by the exchange so that the polarity is reversed, and if the calling side gives up calling because the called side does not respond to the incoming call (for example, if the call is hung up), That is, in the case of abandonment of the call, voltage control is performed so as to reverse the polarity (return the inverted polarity). As described above, the additional device of the telephone terminal connected to the general line detects the reversion of the polarity at the time of the incoming call and controls the timing of the return from the idle state after the abandonment of the call. In addition, in an additional device of a telephone terminal having a call time display function, time integration start timing control for call time display is performed using polarity reversal.

On the other hand, when performing various communications using an ISDN line, a terminal adapter is connected between the ISDN line and an additional device of a telephone terminal. Therefore, the additional equipment of the telephone terminal is ISDN via the terminal adapter.
Although connected to a line, the ISDN line is a digital line and, unlike a general line (analog line), does not perform polarity control such as polarity inversion. Therefore, by controlling the polarity of the general line in place of the ISDN line, the terminal adapter performs the timing control of the idle return from the abandonment of the call and the time accumulation start timing control for displaying the talk time to the additional device of the telephone terminal. ing.

[0004] However, some terminal adapters do not perform polarity control. Therefore, the additional device of the telephone terminal controls the timing of idle return from abandoning the incoming call and the timing of time integration start for displaying the talk time. Control may not be possible. Therefore, most of the additional devices of the telephone terminal are provided with a switch for switching the processing mode for line connection without polarity reversal, and when connecting to a line without polarity reversal, the mode is switched to the line connection mode without polarity reversal. Switching is performed to control idle return timing from call abandonment of incoming calls and time integration start timing control for displaying call time.

[0005]

When the contract line is switched from a general line to an ISDN line, the additional device of the telephone terminal is connected to a terminal adapter. At this time, the user does not check whether or not the terminal adapter used by the user has polarity control, and cannot check the polarity itself. The switch setting is often left as “for line connection with polarity reversal”. This is a natural setting because it is assumed that the additional device of the telephone terminal is connected to a general line.However, if the telephone terminal is used in this state, the additional device of the telephone terminal will be idle from abandoning the incoming call. I don't know when to return,
When the call time display function is provided, there is a problem that the display cannot be performed.

In such a case, the user can set the switch for switching the mode of the additional device of the telephone terminal to the processing mode for line connection without reversing the polarity, thereby preventing the above-mentioned inconvenience phenomenon from occurring. However, since the user cannot know whether or not the line has the polarity inversion, if the above-mentioned inconvenience occurs, the user considers it to be a malfunction of the telephone terminal and makes a complaint to the manufacturer. On the other hand, in response to a complaint from the user, the manufacturer has requested that a switch for setting a processing mode for line connection without polarity reversal be set to solve the problem. Therefore, not only will the response be delayed, but it does not know which user uses which manufacturer's terminal adapter, so there is no problem for users who do not claim it. there were.

Further, even if the operation manual of the additional device of the telephone terminal describes a phenomenon that occurs when the telephone terminal is connected to a line without polarity reversal and a method of coping with the phenomenon, the operation is complicated, and it is difficult for the user. There has been a problem that the operation cannot be performed or that the user is troublesome to deal with.

Furthermore, the necessity of a switch member for switching has caused an increase in the cost of an additional device for a telephone terminal.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. A telephone which automatically determines the presence / absence of polarity reversal of a communication line and automatically switches a processing mode for line connection based on the determination result. It is an object of the present invention to provide an additional device of a terminal and a method of determining the presence / absence of polarity inversion of a communication line. It is another object of the present invention to provide an additional device for a telephone terminal having a function capable of displaying a talk time regardless of whether the polarity of a line is inverted.

[0010]

In order to achieve the above object, a first aspect of the present invention provides a method for determining the presence / absence of polarity reversal of a communication line. When the polarity is detected, the polarity inversion counter operates if polarity inversion is detected, and the polarity non-inversion counter operates if polarity inversion is not detected.As a result of comparing the polarity inversion counter with the polarity non-inversion counter,
If the polarity inversion counter is greater than the polarity non-inversion counter by a predetermined value or more, the communication line is determined to be a line with polarity inversion.If the polarity non-inversion counter is greater than the polarity inversion counter by a predetermined value or more, the communication line is a line without polarity inversion. Is determined, and if the difference between the two counters is less than a predetermined value, the determination result up to that point is continued.

According to a second aspect of the present invention, there is provided a method for determining the presence / absence of polarity reversal of a communication line, wherein a polarity determining counter is provided, the polarity is detected when a communication line arrives, and the polarity determining counter is provided when the polarity reversal is detected. If the count is incremented and the polarity inversion is not detected, the polarity determination counter counts down.If the polarity determination counter reaches a predetermined upper limit, the communication line is determined to be a line with polarity inversion, and the polarity determination counter is determined. When the communication line reaches a predetermined lower limit, the communication line is determined to be a line having no polarity inversion, and when the communication line does not reach the upper limit or the lower limit, the determination result up to that point is continued.

According to a third aspect of the present invention, there is provided a method for determining the presence / absence of polarity inversion of a communication line. If inversion is detected, the polarity inversion counter operates.If polarity inversion is not detected, the polarity non-inversion counter operates.As a result of comparing the polarity inversion counter and the polarity non-inversion counter, the polarity inversion counter is greater than the polarity non-inversion counter. If the value is larger than a predetermined value, the communication line is determined to be a line with polarity inversion.If the polarity non-reversal counter is larger than the value of the polarity reversal counter by a predetermined value or more, the communication line is determined to be a line without polarity reversal. Is smaller than a predetermined value, the determination result up to that point is continued.

According to a fourth aspect of the present invention, there is provided a method for determining the presence / absence of polarity reversal of a communication line, wherein a polarity determination counter is provided, polarity detection is performed within a predetermined time when the communication line is transmitted, and the polarity determination is performed when polarity reversal is detected. Counter counts up,
If the polarity inversion is not detected, the polarity determination counter counts down, and if the polarity determination counter reaches a predetermined upper limit, the communication line determines that the rotation has the polarity inversion,
When the polarity determination counter reaches a predetermined lower limit, the communication line is determined to be a line without polarity inversion, and when the polarity is less than the upper limit or lower limit, the determination result up to that point is continued.

According to a fifth aspect of the present invention, there is provided an additional apparatus for a telephone terminal, comprising: a polarity detecting means for detecting polarity reversal and reversal of a communication line; Presence / absence determination means, and control means for determining the presence / absence of polarity inversion of the communication line by using the output of the polarity detection means and the presence / absence of polarity inversion of the communication line, and providing a trigger for timing control. It is characterized by the following.

According to a sixth aspect of the present invention, there is provided an additional apparatus for a telephone terminal, comprising: polarity detecting means for detecting polarity reversal and reversal; And using the output of the polarity detecting means and the polarity inversion determining means of the communication line to determine the presence / absence of the polarity inversion of the communication line. In the case of a line having no polarity reversal at the pole, a trigger for controlling idle return timing from abandoning the incoming call is performed after a predetermined time from the stop of the ringer.

According to a seventh aspect of the present invention, there is provided an additional apparatus for a telephone terminal, comprising: a polarity detecting means for detecting polarity reversal and reversal of a communication line; Presence / absence determination means, the presence / absence of polarity inversion of the communication line is determined using the output of the polarity detection means and the presence / absence determination means of polarity inversion of the communication line, and if the result of the determination is that the line has polarity inversion, When the polarity is inverted and the line is not inverted, a trigger for timing control of the other party's response in transmission is performed after a predetermined time from the dial transmission.

[0017]

FIG. 1 is a block diagram showing a circuit configuration of an embodiment of an automatic dial adding apparatus according to the present invention, which is an example of an automatic dial adding apparatus externally attached to a communication terminal such as a telephone. In FIG. 1, the automatic dial adding device 2 includes a control circuit 20, a storage circuit 21, a modem circuit 22, a polarity detection circuit 23, a ringer detection circuit 24, a DT detection circuit 25, a display circuit 26, a dial circuit 27, and a hook ON / OFF. It has a detection circuit 28 and a line control circuit 29. In FIG. 1, the automatic dialing apparatus 2 is connected to the telephone 1 and a communication line 3 and is connected to another telephone 5 through the communication line 3 and the exchange 4.

In FIG. 1, a control circuit 20 is control means for controlling the operation of the entire automatic dial adding apparatus. Further, the control circuit 20 determines whether the polarity of the communication line 3 is inverted by using the polarity detection circuit 23, and performs a trigger for performing idle return timing control for abandoning the incoming call and time integration start timing control for displaying the talk time. Emits. Further, the control circuit 20 includes a timer, and when the start timing of the talk time integration is obtained by reversing the polarity, the display time counter is set to 0 and the talk time is set to the display time counter based on the clock signal from the timer. Integrate. When the call is terminated, the integration of the call time to the display time counter is stopped. Also,
The control circuit 20 sets the time after transmission of the dial signal transmitted from the dial circuit 27 as the start timing of the polarity inversion determination.

In the embodiment, a microcomputer comprising a CPU, a program storage memory and a timer is used as the control circuit 20. The program storage memory includes a polarity reaction determination program as a determination means and an integration of display talk time. A call time display program for displaying the integration result on the display circuit 26 is stored.

The storage circuit 21 is storage means for storing the detection result of the polarity detection circuit 23. In the embodiment, the storage circuit 21
Although a volatile memory is used as the memory, any storage circuit capable of writing data and reading the written data may be used.

At the time of reception, the modem circuit 22 demodulates a received signal received from the communication line 3 and sends it to the control circuit 20.
At the time of transmission, a transmission signal from the telephone 1 is modulated and transmitted to the communication line 3.

The polarity detecting circuit 23 is a polarity reversing detecting means for detecting the polarity reversal of the communication line 3 and sending a detection signal to the control circuit 20 at the time of incoming or outgoing call.

The ringer detecting circuit 24 is a calling signal detecting means for detecting a bell calling signal upon receiving a call and sending a calling signal to the control circuit 20. The DT detecting circuit 25 is a line type detecting signal for detecting a signal for confirming the transmission. It is.

Further, the display circuit 26 displays the talk time counted by the control of the talk start timing by the control circuit 20.

The dial circuit 27 receives a dial signal from a dial operation of the telephone 1 performed at the time of transmission, and passes the dial signal to the line control circuit 29 via the control circuit 20.

The ON / OFF hook detection circuit 28 detects the ON / OFF state of the transmitter / receiver of the telephone 1 and passes the detection result to the control circuit 20.

The line control circuit 29 transmits a dial signal passed from the dial circuit 27 via the control circuit 20 to the communication line 3 at the time of transmission, and thereafter transmits a voice signal to the communication line 3. In addition, at the time of an incoming call, a ringing tone is sent to the connection terminal 1 via the line control circuit 29, and at the same time, the ringer detecting circuit 24 detects (a ringing tone) and sends it to the control circuit 20 to determine that the call is incoming.

FIG. 2 is a block diagram showing a circuit configuration of an embodiment of the automatic dial adding apparatus according to the present invention, and is an example of an automatic dial adding apparatus in which a communication terminal such as a telephone incorporates the automatic dial adding apparatus. In FIG. 2, the telephone 1 'includes a control circuit 20, a storage circuit 21, a modem circuit 22, a polarity detection circuit 23, a ringer detection circuit 24, a DT detection circuit 25, a display circuit 26, a dial circuit 27, an ON / OFF hook detection circuit. 28, a line control circuit 29, dial operation keys 30, and a transmission / reception circuit 30 '. Also, telephone 1 '
Is connected to the communication line 3 and to another telephone 5 via the communication line 3 and the exchange 4.

In FIG. 2, the control circuit 20 to the line control circuit 29
1 is the same as that of FIG. 1 (however, the input of the dial signal to the dial circuit 27 is performed from the dial operation key 30, and the dial signal from the dial circuit 27 is passed to the line control circuit 29. The voice signal is transmitted to and received from the line 3 via the transmission / reception circuit 30 'and the line control circuit 29).

Embodiment 1 Method of Determining the Presence or Absence of Polarity Reversal (1-1) Operation of Determining the Presence or Absence of Polarity Reversal at Incoming Call FIG. 3 shows the polarity inversion of the additional device 2 (or telephone 1 ') of the telephone terminal at the time of incoming call 6 is a flowchart showing an embodiment of the presence / absence determination operation.

[Step S1: Detection of Incoming Call] An incoming call is waiting in an idle state, and the idle state is maintained unless there is an incoming call operation. Further, when an incoming call is detected (polarity inversion or ringer detection), transition is made simultaneously to incoming call processing and polarity inversion determination.

[Step S2: Calculation of Polarity Reversal Counter] At the same time that the incoming call is detected, it is determined whether the incoming call has polarity reversal. If there is polarity reversal, the polarity reversal counter is added (n = x + 1), and the polarity reversal is performed. If there is no, the counter without polarity inversion is added (m = y + 1). In this example, the value to be added is 1, but it is not limited to 1 and may be 2 or 3. The value to be added is the previous counter value (x
Or y). Further, x and y may have an upper limit so that they do not exceed a certain value.

[Step S3: Judgment of Line with / without Polarity Inversion] It is determined whether the connected line has polarity inversion based on the difference (xy) between the counter value with polarity inversion and the counter value without polarity inversion. For example, as a result of the difference, if the counter value with the polarity inversion is equal to or more than a certain value (a ≦ xy), the connected line is determined to be the line with the polarity inversion (Z = A). When the difference between the counter value with polarity inversion and the counter value without polarity inversion is a>xy> b, the previous determination result is continued.

[Step S4: Processing for Returning to Idle from Call Abandonment] The timing for returning from idle to abandonment for call abandonment is reversion of polarity inversion if the line has polarity reversal (Z = A). If Z = B), it is determined that an arbitrary time has elapsed since the ringer stopped.

[Step S5: Incoming Call Processing] If the called party answers before the current incoming call is abandoned, the process proceeds to the incoming call processing. If no answer is received, the incoming call processing is maintained until the call is abandoned.

[Step S6: Call Abandon Idle Return Processing Based on Judgment of Polarity Reversal / Unavailable Line] When the current incoming call is abandoned, call abandonment idle based on the polarity reversal existence / absence of the line is determined. Perform return processing.

(1-2) Operation for Determining the Presence or Absence of Polarity Reversal at the Time of Outgoing Call FIG. 4 is a flowchart showing an embodiment of the operation for determining whether or not the polarity reversal of the additional device (or telephone 1 ') of the telephone terminal at the time of calling is performed. is there.

[Step S1: Outgoing Call Detection and Dial Sending] Call waiting in an idle state, and the idle state is maintained as long as there is no call operation. Further, when a call is detected (off-hook detection in the case of a telephone) and a dial is transmitted, a transition is made to polarity reversal detection and talk time counting processing at the same time.

[Step S2: Polarity Reversal Detection] After the dial is transmitted, the count of the polarity detection counter t is started. The reason why the polarity detection counter is provided is to prevent a polarity inversion inversion counter (described later) from counting when the connected line does not respond due to the absence of the called side despite the line having polarity inversion. If t detects polarity inversion within a predetermined time, a counter with polarity inversion is added (n = x + 1), and if there is no polarity inversion within a predetermined time, a counter without polarity inversion is added (m = y + 1). In this example, the value to be added is 1, but it is not limited to 1 and may be 2 or 3. The value to be added is the previous counter value (x or y). Further, x and y may have an upper limit so that they do not exceed a certain value.

[Step S3: Judgment of Line with / without Polarity Inversion] It is determined from the difference (xy) between the counter value with polarity inversion and the counter value without polarity inversion whether or not the connected line has polarity inversion. For example, as a result of the difference, if the counter value with the polarity inversion is equal to or more than a certain value (a ≦ xy), the connected line is determined to be the line with the polarity inversion (Z = A). Also, the result of the determination of the line with / without polarity reversal is stored in the storage circuit. When the difference between the counter value with polarity inversion and the counter value without polarity inversion is a>xy> b,
Continue the previous judgment result.

[Step S4: Talk Time Counting Process] The talking time counting process changes depending on the result of the judgment of the line with / without polarity reversal. In the case of a line with polarity reversal, when the polarity reversal of the response of the other party (called side) is detected, the talk time counting starts.

By the above operation, the automatic dial adding device 1
Can automatically determine the polarity even if the communication line 3 does not have the polarity inversion, and can control the talk time accumulation start timing, so that the talk time can be displayed correctly. Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made.

[0043]

As described above, according to the present invention, the additional device of the telephone terminal can automatically detect the presence / absence of the polarity inversion of the line to be connected, and the line does not have the polarity inversion. Can automatically determine this and control the idle return timing of the telephone when an incoming call is received. In addition, at the time of calling, the call time accumulation start timing control can be performed, so that the call time can be displayed correctly.

Further, even if an additional device of the same telephone terminal is connected from a line with polarity inversion to a line without polarity inversion, line connection control without polarity inversion can be performed automatically. The user of the automatic dial adding apparatus of the present invention does not need to perform mode switching or switch switching every time the line to be connected is changed as in the related art,
It saves the user the trouble.

Further, a complaint and a potential complaint when connecting from a line having polarity reversal to a line having no polarity reversal as in the related art are eliminated, and the trouble of the manufacturer on complaints is reduced accordingly. Further, the need for a switch member for switching is eliminated, which leads to a reduction in the cost of an additional device of the telephone terminal.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a circuit configuration of an embodiment of an additional device for a telephone according to the present invention.

FIG. 2 is a block diagram showing a circuit configuration of an embodiment of the additional device of the telephone according to the present invention.

FIG. 3 is a flowchart showing one embodiment of an operation of determining whether or not polarity inversion of the additional device of the telephone at the time of an incoming call is performed.

FIG. 4 is a flowchart showing one embodiment of an operation for determining the presence / absence of polarity reversal of the additional device of the telephone at the time of calling.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Telephone 2 Telephone additional device 3 Communication line 20 Control circuit (control means, determination means, talk time display means) 21 Storage circuit (storage means) 26 Display circuit (talk time display means)

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masayuki Nishikawa 8nd Ichibancho, Chiyoda-ku, Tokyo Second Denden Co., Ltd. (56) References JP-A-2-32666 (JP, A) JP-A-3-3 174865 (JP, A) JP-A-10-173809 (JP, A) JP-A-10-257199 (JP, A) JP-A-10-304094 (JP, A) JP-A-11-196194 (JP, A) (58) Field surveyed (Int.Cl. ⁷ , DB name) H04M 1/00 H04M 1/253 H04M 1/738 H04M 11/00-11/10

Claims (7)

(57) [Claims] 1. A counter for detecting the number of polarity reversal and the number of non-reversal of polarity reversal is provided.
If polarity inversion is detected, the polarity inversion counter operates.If polarity inversion is not detected, the polarity noninversion counter operates.As a result of comparing the polarity inversion counter and the polarity noninversion counter, the polarity inversion counter indicates that the polarity inversion counter is noninversion. If the counter is greater than the counter by a predetermined value, the communication line is determined to be a line with polarity inversion.If the polarity non-inversion counter is greater than the polarity inversion counter by a predetermined value or more, the communication line is determined to be a line without polarity inversion. A method of determining whether or not the polarity of a communication line has been inverted, wherein the determination result up to that point is continued when the difference is less than a predetermined value. 2. A counter for determining polarity is provided. When a communication line arrives, polarity is detected. When a polarity inversion is detected, the polarity determination counter counts up. When no polarity inversion is detected, the polarity determination counter is used. Counting down, if the polarity determination counter reaches a predetermined upper limit, the communication line is determined to be a line with polarity reversal, and if the polarity determination counter reaches a predetermined lower limit, the communication line is a line without polarity reversal. And determining whether or not the polarity of the communication line has been inverted if the value is less than the upper limit or the lower limit. 3. A counter for detecting the number of polarity reversal and the number of non-reversal of polarity reversal is provided. The polarity detection is performed within a predetermined time when transmitting a communication line, and when the polarity reversal is detected, the polarity reversal counter operates. If it is not detected, the polarity non-inversion counter operates, and as a result of comparing the polarity inversion counter and the polarity non-inversion counter, if the polarity inversion counter is larger than the polarity non-inversion counter by a predetermined value or more, the communication line is regarded as a line with polarity inversion. If the polarity non-inversion counter is greater than the polarity inversion counter by a predetermined value or more, the communication line is determined to be a line having no polarity inversion, and if the difference between the two counters is less than the predetermined value, the determination result up to that point is continued. A method of determining the presence / absence of polarity reversal of a communication line. 4. A counter for polarity determination is provided, polarity detection is performed within a predetermined time when transmitting a communication line, and the polarity determination counter counts up when polarity inversion is detected, and polarity determination when polarity inversion is not detected. When the polarity counter reaches a predetermined upper limit, the communication line is determined to be a rotation with polarity reversal, and when the polarity determination counter reaches a predetermined lower limit, the communication line is reversed. A method for determining the presence / absence of polarity reversal of a communication line, wherein the determination is made that the line does not have a polarity, and if the value is less than the upper limit or the lower limit, the determination result up to that point is continued. 5. A polarity detecting means for detecting polarity reversal or reversal of a communication line, a polarity reversing presence / absence determining means for a communication line corresponding to any one of claims 1 to 4, and an output of said polarity detecting means. Control means for determining the presence / absence of polarity reversal of the communication line using the polarity reversal presence / absence determination means of the communication line and providing a trigger for timing control. 6. A polarity detecting means for detecting polarity reversal or reversal of a communication line, a polarity reversing presence / absence determining means for a communication line corresponding to any one of claims 1 to 4, and an output of said polarity detecting means. The presence / absence of polarity inversion of the communication line is determined by using the polarity inversion presence / absence determination means of the communication line. An additional device for a telephone terminal, characterized in that, if it does, a trigger for controlling idle return timing from abandoning an incoming call is performed a predetermined time after the ringer stops. 7. A polarity detecting means for detecting polarity reversal or reversal of a communication line, a polarity reversing presence / absence determining means for a communication line corresponding to any one of claims 1 to 4, and an output of said polarity detecting means. The presence / absence of polarity inversion of the communication line is determined by using the polarity inversion presence / absence determination means of the communication line.If the result of the determination indicates that the line has polarity inversion, the polarity is inverted, and the line has no polarity inversion. A trigger for controlling the timing of the response of the other party in the transmission after a predetermined time from the dial transmission.