WO2022049757A1 - Circuit de changement de pôle, dispositif de commande, procédé de commande et programme de commande - Google Patents

Circuit de changement de pôle, dispositif de commande, procédé de commande et programme de commande Download PDF

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Publication number
WO2022049757A1
WO2022049757A1 PCT/JP2020/033737 JP2020033737W WO2022049757A1 WO 2022049757 A1 WO2022049757 A1 WO 2022049757A1 JP 2020033737 W JP2020033737 W JP 2020033737W WO 2022049757 A1 WO2022049757 A1 WO 2022049757A1
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WO
WIPO (PCT)
Prior art keywords
circuit
terminal
subscriber
current
line
Prior art date
Application number
PCT/JP2020/033737
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English (en)
Japanese (ja)
Inventor
教之 佐藤
貴行 古屋
Original Assignee
日本電信電話株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to JP2022546845A priority Critical patent/JPWO2022049757A1/ja
Priority to PCT/JP2020/033737 priority patent/WO2022049757A1/fr
Publication of WO2022049757A1 publication Critical patent/WO2022049757A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/28—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP with meter at substation or with calculation of charges at terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Definitions

  • the present invention relates to a repolarization circuit, a control device, a control method, and a control program.
  • a signal such as coin storage is transmitted from the exchange to the terminal in order to notify the timing of storing the inserted coin such as 10 yen in the terminal at regular time intervals (for example, 56 seconds). Since the terminal of a public telephone operates with an analog circuit, the terminal is made to grasp the signal such as coin storage by a special control that inverts (reverts) the polarity of the current supplied to the terminal during a call for about 2 seconds. ..
  • FIG. 13 is a graph of signals such as coin storage.
  • the coin storage signal (communication storage signal) is expressed as a series of current change patterns that elapse in the order of periods T1, T2, T3, T4, and T5.
  • the current in the normal state during a call is turned off in the period T2, and the current is switched to the levers state in the period T3.
  • it is turned off in the period T4 and returns to the normal state in the period T5, so that the transmission of the signal such as coin storage once is completed.
  • FIG. 14 is a configuration diagram of a conventional subscriber telephone system 100Z.
  • the subscriber circuit 92 accommodated in the exchange of the telephone office and the terminal 91 of the public telephone installed in the inn or the like are connected by a subscriber cable.
  • the subscriber circuit 92 is brought into a normal state in the forward direction by passing a current in the order of terminal 92X ⁇ terminal 91 ⁇ terminal 92Y.
  • the subscriber circuit 92 is brought into a levers state in the opposite direction by passing a current in the order of terminal 92Y ⁇ terminal 91 ⁇ terminal 92X.
  • the subscriber circuit 92 is equipped with the following seven functions. These seven functions are collectively called the "BORSCHT" function in which the first letters of the alphabet are arranged. ⁇ Battery feed (power supply function) ⁇ Over voltage protection ⁇ Ringing (call signal transmission function) ⁇ Supervision (monitoring function) ⁇ Coder / decoder ⁇ Hybrid (2-wire-4 wire conversion function) ⁇ Testing (subscriber line test function)
  • Patent Document 1 describes an extended invention for smoothing a change in current inside a subscriber circuit.
  • the main subject of the present invention is to add a repolarization function to a conventional exchange at low cost.
  • the present invention is a diversion circuit that inverts the polarity of the current supplied from the subscriber circuit to the terminal.
  • a first subscriber line that supplies current from the subscriber circuit, a second subscriber line that allows current supplied from the first subscriber line to flow through the subscriber circuit, and a first terminal line that connects to the terminal. And is connected to the second terminal line, respectively.
  • a normal state in which the current from the first subscriber line is passed through the first terminal line and the current from the second terminal line after supplying power to the terminal is passed through the second subscriber line.
  • An off state that cuts off the current from the first subscriber line with respect to the first terminal line and the second terminal line.
  • FIG. 1 is a configuration diagram of a first subscriber telephone system 100A.
  • the subscriber telephone system 100A is configured by inserting a repolarization circuit 3 for transversing the current supplied from the subscriber cable to the terminal 1 between the subscriber circuit 2 of the exchange and the terminal 1 of the public telephone.
  • the subscriber circuit 2 of FIG. 1 is equipped with at least the following three functions among the "BORSCHT" functions mounted on the subscriber circuit 92 of FIG. ⁇ Battery feed (power supply function) ⁇ Coder / decoder ⁇ Hybrid (2-wire-4 wire conversion function)
  • the repolarization circuit 3 is connected to the outside via the following four wires.
  • the first subscriber line connects terminals 2X and P1.
  • the second subscriber line connects between terminals 2Y and P4.
  • the first terminal line connects between the terminal P2 and the terminal 1.
  • the second terminal line connects between the terminal P3 and the terminal 1.
  • the repolarization circuit 3 has the following four switches as a switch mechanism for realizing the repolarization function.
  • This repolarization function is a new function that is not included in the conventional "BORSCHT" function.
  • -Switch Sn1 that turns the connection between terminals P1 and P2 on and off.
  • -Switch Sr1 that turns the connection between terminals P1 and P3 on and off.
  • -Switch Sr2 that turns the connection between terminals P2 and P4 on and off.
  • -Switch Sn2 that turns the connection between terminals P3 and P4 on and off.
  • switches The sign of these switches is "S” indicating the switch, "n or r” indicating that it is turned on in the normal state (n) or the levers state (r), and the first or two from the top. It is a combination with “1 or 2" that indicates the eye. For example, in the normal state, two switches, Sn1 and Sn2, are turned on.
  • the subscriber telephone system 100A also has a control device 4 for transmitting a control signal to each switch of the pole conversion circuit 3 to control on / off.
  • the control device 4 switches each switch of the reversion circuit 3 in cooperation with the subscriber circuit 2 so that a signal such as coin storage can be transmitted at a predetermined timing such as 10 yen at regular time intervals (for example, 56 seconds). ..
  • the coin storage signal instructed by the control device 4 using the rotation function of the conversion circuit 3 includes a “response storage signal” and a “100 yen storage signal”. It is also applicable to.
  • FIG. 2 is a state transition table of the first subscriber telephone system 100A. This table associates the on / off state of the switches Sn1 and Sn2 with the on / off state of the switches Sr1 and Sr2 and the current flow state for each period T1 to T5 shown in FIG.
  • the control device 4 turns on (closes) switches Sn1 and Sn2 and turns off (opens) switches Sr1 and Sr2.
  • the current supplied from the terminal 2X of the subscriber circuit 2 passes in the order of terminal 2X ⁇ P1 ⁇ P2 ⁇ terminal 1 ⁇ P3 ⁇ P4 ⁇ 2Y, so that a constant current flows in the forward direction.
  • the control device 4 turns off all four switches Sn1, Sn2, Sr1 and Sr2. As a result, all the connections between the subscriber circuit 2 and the terminal 1 are disconnected, and the state is turned off.
  • the control device 4 turns off the switches Sn1 and Sn2 and turns on the switches Sr1 and Sr2. As a result, the current supplied from the terminal 2X of the subscriber circuit 2 passes in the order of terminal 2X ⁇ P1 ⁇ P3 ⁇ terminal 1 ⁇ P2 ⁇ P4 ⁇ 2Y, so that a constant current flows in the opposite direction.
  • FIG. 3 is a hardware configuration diagram of the control device 4.
  • the control device 4 is configured as a computer 900 having a CPU 901, a RAM 902, a ROM 903, an HDD 904, a communication I / F 905, an input / output I / F 906, and a media I / F 907.
  • the communication I / F 905 is connected to an external communication device 915.
  • the input / output I / F 906 is connected to the input / output device 916.
  • the media I / F907 reads / writes data from the recording medium 917.
  • the CPU 901 controls each processing unit by executing a program (also referred to as an application or an abbreviation thereof) read into the RAM 902.
  • the program can also be distributed via a communication line, or recorded and distributed on a recording medium 917 such as a CD-ROM.
  • FIG. 4 is a configuration diagram of the second subscriber telephone system 100B.
  • this subscriber telephone system 100B in addition to the configuration of the subscriber telephone system 100A of FIG. 1, for example, coils L1 and L2 are added to the pole circuit 3 as a first electric filter circuit provided for the purpose of smoothing the change of current. did.
  • the change in the current at the time of turning is steep, such as when the periods T1 and T2 are separated, the change in the current can be smoothed by passing the current through the coils L1 and L2. Therefore, it is possible to suppress the noise generated when the change in the current is steep.
  • FIG. 5 is a state transition table of the second subscriber telephone system 100B.
  • the combination of switching on and off in each period of the state transition table is common.
  • the difference is that in the state transition table of FIG. 5, the change of the current in each period becomes smooth. For example, from the end of the period T1 to the start of the period T2 in FIG. 13, the current momentarily (steeply) shifts from normal to off.
  • the current at the start of the period T2 is slightly weaker than that at the end of the period T1, and the current is gradually turned off in the latter half of the period T2. The current becomes weaker (see the waveform of FIG. 3 (f) of Patent Document 1).
  • FIG. 6 is a configuration diagram of the third subscriber telephone system 100C.
  • a first invalidation circuit for disabling the first electric filter circuit (coils L1 and L2) is added to the repolarization circuit 3.
  • the first invalidation circuit is composed of, for example, a switch SL1 parallel to the coil L1 and a switch SL2 parallel to the coil L2.
  • FIG. 7 is a first example of the state transition table of the third subscriber telephone system 100C.
  • the control device 4 since the influence signal does not flow, the control device 4 turns off the switches SL1 and SL2 during the entire period T1 to T5 during the inversion. As a result, a current flows through the first electric filter circuit (coils L1 and L2), so that the current states in each period are the same in FIGS. 7 and 5. Therefore, in the subscriber telephone system 100C as well as the subscriber telephone system 100B, it is possible to suppress the noise generated when the change in the current is steep.
  • FIG. 8 is a second example of the state transition table of the third subscriber telephone system 100C.
  • the control device 4 since the influence signal flows, the control device 4 turns on the switches SL1 and SL2 during the entire period T1 to T5 during the inversion. As a result, no current flows through the first electric filter circuit (coils L1 and L2), so that the current states in each period are the same in FIGS. 8 and 2. Therefore, a signal such as coin storage can be transmitted by the subscriber telephone system 100C as well as the subscriber telephone system 100A.
  • FIG. 9 is a configuration diagram of the fourth subscriber telephone system 100D.
  • a second electric filter circuit for passing an audio signal in parallel with the first electric filter circuit (coils L1 and L2) is inserted in the repolarization circuit 3.
  • the second electric filter circuit is composed of, for example, a capacitor C1 parallel to the coil L1 and a capacitor C2 parallel to the coil L2.
  • the first electric filter circuit (coils L1, L2) increases the electrical impedance for high frequency audio signals (voice, FAX signal, modem signal, etc.), and even when the high frequency voice signal is attenuated, the voice signal. Can pass through the pole circuit 3. Therefore, it is possible to appropriately prevent the case where the voice becomes difficult to hear or the case where the fax signal, the modem signal, or the like is attenuated and communication becomes impossible.
  • FIG. 10 is a state transition table of the fourth subscriber telephone system 100D.
  • the state transition table of FIG. 10 has the same first row (Sn1, Sn2) to third row (current) as the state transition table of FIG.
  • the fourth row row indicating the quality of the audio signal
  • the capacitors C1 and C2 attenuate the audio signal. Is suppressed and the sound can be heard.
  • FIG. 11 is a configuration diagram of the fifth subscriber telephone system 100E.
  • the subscriber telephone system 100E enables (activates) or disables the second electric filter circuit (capacitors C1 and C2) for passing an audio signal.
  • the circuit was added in the pole circuit 3.
  • the second invalidation circuit is composed of, for example, a switch SC1 in series with the capacitor C1 and a switch SC2 in series with the capacitor C2.
  • a potential difference is generated at both ends of the coils L1 and L2, and a potential difference is also generated at both ends of the capacitors C1 and C2, so that noise is generated.
  • FIG. 12 is a state transition table of the fifth subscriber telephone system 100E.
  • the state transition table of FIG. 12 is compared with the state transition table of FIG. 10, the following rows are the same. -The first line of FIG. 10 and the first line of FIG. 12 (switches Sn1 and Sn2 are on / off). -The second line of FIG. 10 and the third line of FIG. 12 (switches Sr1 and Sr2 are on / off). 3rd row in FIG. 10 and 5th row in FIG. 12 (current state)
  • the states of the switches SC1 and SC2 in each period of FIG. 12 will be described.
  • the control device 4 turns on the switches SC1 and SC2.
  • the voice can be heard as in the period T1 of FIG.
  • the control device 4 turns off the switches SC1 and SC2.
  • the voice cannot be heard for a short period of time.
  • the control device 4 turns off the switches SC1 and SC2, and delays the on of the switches Sr1 and Sr2 (for example, after the potential difference between the ends of the coils L1 and L2 disappears). turn on.
  • the audio signal can be heard with a delay from the on of the switches Sr1 and Sr2.
  • the control device 4 turns on the switches SC1 and SC2 after the switches Sn1 and Sn2 are turned on (for example, after the potential difference between the ends of the coils L1 and L2 disappears). As a result, the audio signal can be heard with a delay from the on of the switches Sn1 and Sn2. As described above with reference to FIG. 12, the control device 4 prevents the generation of noise by finely controlling the period for enabling the second electric filter circuit (capacitors C1 and C2) through which the audio signal is passed. Further, the subscriber circuit 2 and the repolarization circuit 3 of the subscriber telephone systems 100A to 100E may be configured as separate housings, or may be housed in the same housing (exchange).
  • the present invention is a diversion circuit 3 that inverts the polarity of the current supplied from the subscriber circuit 2 to the terminal 1.
  • the first subscriber line that supplies current from the subscriber circuit 2, the second subscriber line that sends the current supplied from the first subscriber line to the subscriber circuit 2, the first terminal line connected to the terminal 1, and so on. It is connected to the second terminal line respectively, A normal state in which the current from the second terminal line after supplying power to the terminal 1 is passed to the second subscriber line while the current from the first subscriber line is passed through the first terminal line.
  • a switch mechanism that can switch between a levers state in which the current from the first terminal line after supplying power to the terminal 1 flows to the second subscriber line while the current from the first subscriber line is flowing to the second terminal line. It is characterized by having Sn1, Sn2, Sr1, Sr2). Further, the present invention is a control device 4 that controls the switch mechanism of the repolarization circuit 3.
  • the present invention is characterized in that the repolarization circuit 3 further includes a first electric filter circuit (coils L1, L2) for smoothing a change in current.
  • a first electric filter circuit coil L1, L2
  • the noise generated when the current change is steep is reduced without using a dedicated switch equipped with an extension for smoothing the current change as in Patent Document 1. It can be suppressed by cost.
  • the present invention is characterized in that the repolarization circuit 3 further has a first invalidation circuit (switch SL1, SL2) for invalidating the first electric filter circuit at a position parallel to the first electric filter circuit. .. As a result, only the signal affected by the first electric filter circuit can be bypassed.
  • a first invalidation circuit switch SL1, SL2
  • the present invention is characterized in that the repolarization circuit 3 further has a second electric filter circuit (capacitors C1 and C2) for passing an audio signal at a position parallel to the first electric filter circuit. Thereby, even when the high frequency audio signal is attenuated when passing through the first electric filter circuit, the attenuation of the audio signal can be suppressed through the second electric filter circuit.
  • a second electric filter circuit capacitor C1 and C2
  • the present invention is characterized in that the repolarization circuit 3 further has a second invalidation circuit (switches SC1 and SC2) for invalidating the second electric filter circuit at a position in series with the second electric filter circuit. ..
  • a second invalidation circuit switching SC1 and SC2 for invalidating the second electric filter circuit at a position in series with the second electric filter circuit. ..

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

Selon l'invention, un circuit de changement de pôle (3) permettant d'inverser la polarité d'un courant fourni à une borne (1) à partir d'un circuit d'abonné (2) comporte des commutateurs (Sn1, Sn2, Sr1, Sr2) qui peuvent commuter entre : un état normal dans lequel un courant provenant d'une première ligne d'abonné est amené à circuler vers une première ligne de borne, tandis qu'un courant ayant été fourni à la borne (1) et provenant d'une deuxième ligne de terminal est amené à circuler vers une deuxième ligne d'abonné ; un état désactivé dans lequel le courant provenant de la première ligne d'abonné est interrompu par rapport à la première ligne de borne et à la deuxième ligne de borne ; et un état inversé dans lequel un courant provenant de la première ligne d'abonné est amené à circuler vers la deuxième ligne de borne, tandis qu'un courant ayant été fourni à la borne (1) et provenant de la première ligne de borne est amené à circuler vers la deuxième ligne d'abonné.
PCT/JP2020/033737 2020-09-07 2020-09-07 Circuit de changement de pôle, dispositif de commande, procédé de commande et programme de commande WO2022049757A1 (fr)

Priority Applications (2)

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JP2022546845A JPWO2022049757A1 (fr) 2020-09-07 2020-09-07
PCT/JP2020/033737 WO2022049757A1 (fr) 2020-09-07 2020-09-07 Circuit de changement de pôle, dispositif de commande, procédé de commande et programme de commande

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PCT/JP2020/033737 WO2022049757A1 (fr) 2020-09-07 2020-09-07 Circuit de changement de pôle, dispositif de commande, procédé de commande et programme de commande

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WO2022049757A1 true WO2022049757A1 (fr) 2022-03-10

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60183891A (ja) * 1984-03-02 1985-09-19 Nippon Telegr & Teleph Corp <Ntt> 加入者回路
JP2001197225A (ja) * 2000-01-11 2001-07-19 Hitachi Ltd 加入者回路

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60183891A (ja) * 1984-03-02 1985-09-19 Nippon Telegr & Teleph Corp <Ntt> 加入者回路
JP2001197225A (ja) * 2000-01-11 2001-07-19 Hitachi Ltd 加入者回路

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