WO2011148680A1 - 過大信号防止装置及びその方法 - Google Patents
過大信号防止装置及びその方法 Download PDFInfo
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- WO2011148680A1 WO2011148680A1 PCT/JP2011/053448 JP2011053448W WO2011148680A1 WO 2011148680 A1 WO2011148680 A1 WO 2011148680A1 JP 2011053448 W JP2011053448 W JP 2011053448W WO 2011148680 A1 WO2011148680 A1 WO 2011148680A1
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- 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
- H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
- H04Q3/545—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised using a stored programme
- H04Q3/54575—Software application
- H04Q3/54591—Supervision, e.g. fault localisation, traffic measurements, avoiding errors, failure recovery, monitoring, statistical analysis
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/42314—Systems providing special services or facilities to subscribers in private branch exchanges
Definitions
- the present invention relates to a transmission signal in which a transmission signal transmitted from the first device to the second device in a normal state represents an excessive level when the connection between the first device and the second device becomes abnormal. (Hereinafter referred to as “excessive signal”).
- the present invention relates to an excessive signal prevention device and an excessive signal prevention method.
- the first device is a radio base station and the second device is a private branch exchange.
- a mobile station wirelessly connected to the radio base station converts an audio analog signal obtained from the voice of the user of the mobile station into an audio digital signal.
- the audio digital signal is transmitted as it is from the mobile station to the telephone of the other party via a radio base station, a private branch exchange or the like. Then, in the telephone of the other party, the voice digital signal is returned to the voice analog signal so that the other party can hear.
- the audio analog signal is also affected.
- noise is mixed in a heavy part of the audio digital signal, an excessive sound is generated in the telephone of the other party, which makes the other party feel uncomfortable.
- One reason for the noise mixed in the voice digital signal is the disconnection of the line between the radio base station and the private branch exchange.
- line disconnection detection of the line where the base station interface card of the private branch exchange and the wireless base station are connected is detected by detecting the disconnection or recovery by monitoring the line voltage of the hardware or monitoring the communication status by software on the private branch exchange side. I was suppressing.
- the conventional hardware control means when a line disconnection and recovery occur in a short time, there is a possibility that an excessive sound will be sent to the exchange side at the time of recovery.
- the detection means by software has a long detection cycle depending on the specifications on the exchange side, there is a possibility that excessive sound may be sent to the exchange side until the disconnection can be detected by software.
- Patent Document 1 a transmission path for transmitting and receiving audio signals is used, and a signaling signal for an exchange or a telephone is transmitted and received using a first frequency signal consisting of a single frequency signal or a plurality of frequency signals within a band.
- the signal generation unit provided in the transmission unit generates a second frequency signal different from the audio signal and the first frequency signal
- the level detection unit provided in the reception unit generates a game.
- the voice signal and the second frequency signal are detected so that when the no-call state is detected in the level detecting means in the call state, the second frequency signal is transmitted from the signal generating means to the game, and the level detecting means
- a line disconnection detection method for determining a line disconnection when the second frequency signal is not detected is described.
- the no-signal state of the transmission voice and the first frequency signal is detected by the no-signal detection means provided in the transmission unit.
- the no-signal detection means provided in the transmission unit.
- the line condition with the radio base station was detected by detecting the line disconnection by monitoring the line voltage level, so a line voltage detection circuit and a silence insertion circuit were required, and an excessive noise suppression control circuit was large. There was a problem of scale.
- the present invention provides an excessive signal prevention device and an excessive signal prevention method capable of preventing the occurrence of an excessive signal with a small configuration without using a signal other than a signal essential for transmission of the transmission signal.
- One purpose is to do.
- connection state determination means for detecting whether the connection between the first device and the second device is normal or abnormal, and the first device and the first device by the connection state determination means The transmission signal output by the first device is output to an output destination during a period in which it is determined that the connection between the two devices is normal, and the connection state determination unit and the first device
- an excessive signal prevention device comprising: zero level signal insertion means for outputting a zero level signal to the output destination during a period when it is determined that the connection with the second device is abnormal. Is done.
- a signal pattern that is one or more signals other than a transmission signal transmitted from the first device to the second device in a normal state and is essential for transmission of the transmission signal.
- a connection state determination step for detecting whether the connection between the first device and the second device is normal or abnormal, whether the input audio signal is normal or abnormal, The transmission signal output by the first device is output to an output destination during a period when the connection state determination step determines that the connection between the first device and the second device is normal.
- a zero level signal inserting step of outputting a zero level signal to the output destination during a period in which the connection between the first device and the second device is determined to be abnormal by the connection state determining step;
- Over-signal prevention characterized by comprising A method is provided.
- the first device based on a signal pattern that is one or more signals other than a transmission signal transmitted from the first device to the second device in a normal state and is essential for transmission of the transmission signal, the first device It is possible to detect whether the connection between the second device and the second device is normal or abnormal, so that an excessive signal can be generated in a small configuration without using a signal other than a signal essential for transmission of the transmission signal. Can be prevented.
- FIG. 1 It is a block diagram which shows the radio base station connected to the part relevant to this invention of the private branch exchange by embodiment of this invention, and a private branch exchange. It is a block diagram which shows the internal structure of the connection state judgment part shown in FIG. It is a block diagram which shows the internal structure of the zero level signal insertion part shown in FIG.
- private branch exchange 50 includes a base station interface card 10 connected to radio base station 1.
- the base station interface card 10 includes a signal conversion unit 30 and an excessive voice suppression control unit 20.
- the excessive voice suppression control unit 20 includes a connection state determination unit 30, a zero level signal insertion unit 40, and a pattern signal generation unit 50.
- the radio base station 1 performs radio communication with one or more mobile stations (not shown).
- a voice signal generated based on a voice of a user of a mobile station is transmitted to a telephone of a call partner (another mobile station that performs radio communication with the radio base station 1, a radio base station other than the radio base station 1, and a radio Since it deals with the case of outputting from the voice output unit of a mobile station, a fixed telephone, etc. that performs communication, the following description will be made paying attention to that case.
- the mobile station connected to the radio base station 1 converts the voice input from the user into a voice analog signal, and then converts the voice analog signal into a voice digital signal.
- the mobile station wirelessly transmits an audio digital signal to the radio base station 1 according to a predetermined method.
- the radio base station 1 transmits the received audio digital signal to the signal conversion unit 30 according to a predetermined method.
- the signal transmitted by this predetermined method is an AMI signal including an audio digital signal and a control signal.
- the signal transmitted by this predetermined method also includes a synchronization signal.
- the signal converter 30 separates the received AMI signal into an audio digital signal and a control signal. Further, the signal conversion unit 30 outputs the synchronization signal and the control signal to the connection state determination unit 30, and outputs the received audio digital signal to the zero level signal insertion unit 40.
- the pattern signal generation unit 50 compares the reference synchronization signal for comparison with the synchronization signal input from the signal conversion unit 30 by the connection state determination unit 30 and the control signal input from the signal conversion unit 30 by the connection state determination unit 30.
- a reference control signal for generating the reference control signal.
- connection state determination unit 30 compares the synchronization signal input from the signal conversion unit 30 with the reference synchronization signal input from the pattern signal generation unit 50 in a portion where they should match, and the control input from the signal conversion unit 30 The signal and the reference control signal input from the pattern signal generator 50 are compared in a portion where they should match.
- the portion where both should coincide is, for example, a fixed pattern portion.
- the connection state determination unit 30 determines that the connection between the radio base station 1 and the signal conversion unit 30 is normal when a match is detected in both of the two comparisons described above.
- connection state determination unit 30 determines that the connection between the radio base station 1 and the signal conversion unit 30 is abnormal when a mismatch is detected in at least one of the two comparisons described above. To do. Then, the connection state determination unit 30 outputs a connection state signal indicating normality / abnormality of the connection to the zero level signal insertion unit 40.
- the zero level signal insertion unit 40 when the connection state signal indicates that the connection is normal, the zero level signal insertion unit 40 outputs the voice digital signal input from the signal conversion unit 30 to the inside of the private branch exchange as it is. On the other hand, when the connection state signal indicates an abnormal connection, the zero level signal insertion unit 40 outputs the zero level signal generated inside to the private branch exchange.
- the zero level signal is an audio digital signal indicating no sound in the present embodiment.
- the connection state determination unit 30 includes a pattern comparison unit 31, a detection protection unit 32, a recovery protection unit 33, and a detection signal generation unit 34.
- the pattern comparison unit 31 compares the synchronization signal input from the signal conversion unit 30 and the reference synchronization signal input from the pattern signal generation unit 50 at a portion where they should match, and from the signal conversion unit 30.
- a second comparison is performed in which the input control signal and the reference pattern signal input from the pattern signal generator 50 are compared at a portion where they should match.
- both the result of the first comparison and the result of the second comparison indicate coincidence, “match” is indicated, and at least one of the result of the first comparison and the result of the second comparison is In the case of indicating a mismatch, a match / mismatch signal indicating “mismatch” is output to the detection protection unit 32 and the recovery protection unit 33.
- the detection protection unit 32 outputs a mismatch signal to the detection signal generation unit 34 when a predetermined number of frames in which the match / mismatch signal indicates “mismatch” continues.
- the predetermined number may be 1, but the operation is more stable when it is 2 or more.
- the restoration protection unit 33 outputs a match signal to the detection signal generation unit 34 when a predetermined number of frames whose match / mismatch signals indicate “match” continue.
- the predetermined number may be 1, but the operation is more stable when it is 2 or more.
- by setting the predetermined number to several it is possible to prevent excessive noise from occurring at the time of recovery.
- the detection signal generation unit 34 changes the value of the connection state signal to a value indicating that the connection state is abnormal, and inputs the match signal from the recovery protection unit 33. If so, the value of the connection state signal is changed to a value indicating that the connection state is normal.
- the zero level signal insertion unit 40 includes a zero level signal generation unit 41 and a voice selection unit 42.
- the zero level signal generation unit 41 generates the above-described zero level signal.
- the voice selection unit 42 outputs the voice digital signal from the radio base station 1 as it is inside the exchange, and on the other hand, the connection status signal is When connection abnormality is indicated, the zero level signal input from the zero level signal generation unit 41 is output as an audio digital signal to the inside of the exchange.
- the first effect of this embodiment is that excessive voice is not transmitted to the exchange even if the line connecting the radio base station and the private branch exchange is disconnected or restored.
- the reason is that the base station interface card has an excessive sound suppression control unit by hardware.
- the second effect of this embodiment is that no special voltage monitoring circuit is required. For this reason, the cost of hardware can be reduced. The reason is that it has an excessive sound suppression control unit that uses the synchronization signal and the control signal from the radio base station as signals for detecting line disconnection.
- the present invention is not limited to the above-described embodiment, and is a device connected by wire from the private branch exchange, such that the private branch exchange cannot immediately detect line disconnection, or a device with a large delay to the end device. It can also be applied when is connected.
- the normality / abnormality of the connection is detected using the synchronization signal and the control signal, but the normality / abnormality of the connection may be detected using only the synchronization signal or only the control signal.
- an audio signal is handled, but a video signal may be handled.
- a blue back signal or the like may be used as the zero level signal.
- connection state determining means for detecting whether the connection with the device is normal or abnormal, The transmission signal output by the first device is output to an output destination during a period when the connection state determination means determines that the connection between the first device and the second device is normal.
- a zero level signal inserting means for outputting a zero level signal to the output destination during a period when the connection state judging means judges that the connection between the first device and the second device is abnormal.
- An over-signal prevention device comprising: (Appendix 2) In the excessive signal prevention device according to attachment 1, The connection state determination means matches at a portion where at least one signal pattern of one or more signals other than the transmission signal, which is essential for transmission of the transmission signal, should match a comparison pattern corresponding to the signal. An excessive signal prevention device characterized in that, when not, the connection between the first device and the second device is determined to be abnormal. (Appendix 3) In the excessive signal prevention device according to attachment 1, The connection state determination means matches at a portion where at least one signal pattern of one or more signals other than the transmission signal, which is essential for transmission of the transmission signal, should match a comparison pattern corresponding to the signal.
- An over-signal prevention device wherein when the period during which no signal is transmitted exceeds a certain level, it is determined that the connection between the first device and the second device is abnormal.
- the connection state determination means determines that the connection between the first device and the second device is abnormal, and then is one or more signals other than the transmission signal and is essential for transmission of the transmission signal.
- An over-signal that determines that the connection between the first device and the second device has returned to normal when the pattern of each signal matches in a portion that should match the comparison pattern corresponding to the signal. Prevention device.
- connection state determination means determines that the connection between the first device and the second device is abnormal, and then is one or more signals other than the transmission signal and is essential for transmission of the transmission signal. It is determined that the connection between the first device and the second device has returned to normal when the period in which the pattern of each signal matches the comparison pattern corresponding to the signal becomes equal to or longer than a certain period.
- An over-signal prevention device characterized by that.
- connection state determination step for detecting whether the connection with the device is normal or abnormal, whether the input audio signal is normal or abnormal, and The transmission signal output by the first device is output to an output destination during a period when the connection state determination step determines that the connection between the first device and the second device is normal.
- An over-signal prevention method comprising: (Appendix 9) In the excessive signal prevention method according to attachment 8, In the connection state determining step, at least one signal other than the transmission signal, which is essential for transmission of the transmission signal, matches in a portion where a pattern of the signal should match a comparison pattern corresponding to the signal.
- connection state determining step At least one signal other than the transmission signal, which is essential for transmission of the transmission signal, matches in a portion where a pattern of the signal should match a comparison pattern corresponding to the signal.
- a method for preventing an excessive signal characterized in that when the period during which the transmission is not performed becomes equal to or greater than a certain period, it is determined that the connection between the first device and the second device is abnormal.
- connection state determination step after determining that the connection between the first device and the second device is abnormal, the connection state determination step is one or more signals other than the transmission signal and is essential for transmission of the transmission signal.
- connection state determination step after determining that the connection between the first device and the second device is abnormal, the connection state determination step is one or more signals other than the transmission signal and is essential for transmission of the transmission signal. It is determined that the connection between the first device and the second device has returned to normal when the period in which the pattern of each signal matches the comparison pattern corresponding to the signal becomes equal to or longer than a certain period. A method for preventing an excessive signal.
- the over-signal prevention method characterized in that one or more signals other than the transmission signal that are essential for transmission of the transmission signal are a synchronization signal, a control signal, or both.
- the present invention can be applied to a case where communication data needs to be immediately determined when line disconnection and recovery occur between devices connected by wire.
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Abstract
Description
無線基地局に無線接続された移動局は、その移動局の利用者の音声から得られる音声アナログ信号を音声デジタル信号に変換する。音声デジタル信号は、音声デジタル信号のまま、移動局から無線基地局、構内交換機などを経由して通話相手の電話機に伝送される。そして、通話相手の電話機において、音声デジタル信号は音声アナログ信号に戻されて、通話相手が聞こえるようになる。
また、本発明の第2の観点によれば、正常時に第1の装置から第2の装置に伝送される伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号のパターンを基に、前記第1の装置と前記第2の装置との間の接続が正常であるのか異常であるのか入力音声信号が正常であるか異常であるかを検出する接続状態判断ステップと、前記接続状態判断ステップにより前記第1の装置と前記第2の装置との間の接続が正常であると判断された期間に、前記第1の装置が出力した前記伝送信号を出力先に出力し、前記接続状態判断ステップにより前記第1の装置と前記第2の装置との間の接続が異常であると判断された期間に、ゼロレベル信号を前記出力先に出力するゼロレベル信号挿入ステップと、を備えることを特徴とする過大信号防止方法が提供される。
正常時に第1の装置から第2の装置に伝送される伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号のパターンを基に、前記第1の装置と前記第2の装置との間の接続が正常であるのか異常であるのかを検出する接続状態判断手段と、
前記接続状態判断手段により前記第1の装置と前記第2の装置との間の接続が正常であると判断された期間に、前記第1の装置が出力した前記伝送信号を出力先に出力し、前記接続状態判断手段により前記第1の装置と前記第2の装置との間の接続が異常であると判断された期間に、ゼロレベル信号を前記出力先に出力するゼロレベル信号挿入手段と、
を備えることを特徴とする過大信号防止装置。
(付記2)
付記1に記載の過大信号防止装置において、
前記接続状態判断手段は、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号の少なくとも1つの信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致しない時に、前記第1の装置と前記第2の装置との間の接続が異常であると判断することを特徴とする過大信号防止装置。
(付記3)
付記1に記載の過大信号防止装置において、
前記接続状態判断手段は、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号の少なくとも1つの信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致しない期間が一定以上となった時に、前記第1の装置と前記第2の装置との接続が異常であると判断することを特徴とする過大信号防止装置。
(付記4)
(付記1)乃至(付記3)の何れか1に記載の過大信号防止装置において、
前記接続状態判断手段は、前記第1の装置と前記第2の装置との接続が異常であると判断した後に、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な各信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致した時に、前記第1の装置と前記第2の装置との接続が正常に戻ったと判断することを特徴とする過大信号防止装置。
(付記5)
(付記1)乃至(付記3)の何れか1に記載の過大信号防止装置において、
前記接続状態判断手段は、前記第1の装置と前記第2の装置との接続が異常であると判断した後に、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な各信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致する期間が一定以上となった時に、前記第1の装置と前記第2の装置との接続が正常に戻ったと判断することを特徴とする過大信号防止装置。
(付記6)
(付記1)乃至(付記5)の何れか1に記載の過大信号防止装置において、
前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号は、同期信号、制御信号又はその双方であることを特徴とする過大信号防止装置。
(付記7)
(付記1)乃至(付記6)の何れか1に記載の過大信号防止装置を含む交換機。
(付記8)
正常時に第1の装置から第2の装置に伝送される伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号のパターンを基に、前記第1の装置と前記第2の装置との間の接続が正常であるのか異常であるのか入力音声信号が正常であるか異常であるかを検出する接続状態判断ステップと、
前記接続状態判断ステップにより前記第1の装置と前記第2の装置との間の接続が正常であると判断された期間に、前記第1の装置が出力した前記伝送信号を出力先に出力し、前記接続状態判断ステップにより前記第1の装置と前記第2の装置との間の接続が異常であると判断された期間に、ゼロレベル信号を前記出力先に出力するゼロレベル信号挿入ステップと、
を備えることを特徴とする過大信号防止方法。
(付記9)
付記8に記載の過大信号防止方法において、
前記接続状態判断ステップは、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号の少なくとも1つの信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致しない時に、前記第1の装置と前記第2の装置との間の接続が異常であると判断することを特徴とする過大信号防止方法。
(付記10)
付記8に記載の過大信号防止方法において、
前記接続状態判断ステップは、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号の少なくとも1つの信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致しない期間が一定以上となった時に、前記第1の装置と前記第2の装置との接続が異常であると判断することを特徴とする過大信号防止方法。
(付記11)
(付記8)乃至(付記10)の何れか1に記載の過大信号防止方法において、
前記接続状態判断ステップは、前記第1の装置と前記第2の装置との接続が異常であると判断した後に、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な各信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致した時に、前記第1の装置と前記第2の装置との接続が正常に戻ったと判断することを特徴とする過大信号防止方法。
(付記12)
(付記8)乃至(付記10)の何れか1に記載の過大信号防止方法において、
前記接続状態判断ステップは、前記第1の装置と前記第2の装置との接続が異常であると判断した後に、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な各信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致する期間が一定以上となった時に、前記第1の装置と前記第2の装置との接続が正常に戻ったと判断することを特徴とする過大信号防止方法。
(付記13)
(付記8)乃至(付記12)の何れか1に記載の過大信号防止方法において、
前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号は、同期信号、制御信号又はその双方であることを特徴とする過大信号防止方法。
10 基地局インタフェースカード
20 過大音声抑圧制御部
30 接続状態判断部
31 パターン比較部
32 検出保護部
33 復旧保護部
34 検出信号生成部
40 ゼロレベル信号挿入部
41 ゼロレベル信号生成部
42 音声選択部
50 パターン信号生成部
Claims (8)
- 正常時に第1の装置から第2の装置に伝送される伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号のパターンを基に、前記第1の装置と前記第2の装置との間の接続が正常であるのか異常であるのかを検出する接続状態判断手段と、
前記接続状態判断手段により前記第1の装置と前記第2の装置との間の接続が正常であると判断された期間に、前記第1の装置が出力した前記伝送信号を出力先に出力し、前記接続状態判断手段により前記第1の装置と前記第2の装置との間の接続が異常であると判断された期間に、ゼロレベル信号を前記出力先に出力するゼロレベル信号挿入手段と、
を備えることを特徴とする過大信号防止装置。 - 請求項1に記載の過大信号防止装置において、
前記接続状態判断手段は、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号の少なくとも1つの信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致しない時に、前記第1の装置と前記第2の装置との間の接続が異常であると判断することを特徴とする過大信号防止装置。 - 請求項1に記載の過大信号防止装置において、
前記接続状態判断手段は、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号の少なくとも1つの信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致しない期間が一定以上となった時に、前記第1の装置と前記第2の装置との接続が異常であると判断することを特徴とする過大信号防止装置。 - 請求項1乃至3の何れか1項に記載の過大信号防止装置において、
前記接続状態判断手段は、前記第1の装置と前記第2の装置との接続が異常であると判断した後に、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な各信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致した時に、前記第1の装置と前記第2の装置との接続が正常に戻ったと判断することを特徴とする過大信号防止装置。 - 請求項1乃至3の何れか1項に記載の過大信号防止装置において、
前記接続状態判断手段は、前記第1の装置と前記第2の装置との接続が異常であると判断した後に、前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な各信号のパターンがその信号に対応した比較パターンと一致するべき部分において一致する期間が一定以上となった時に、前記第1の装置と前記第2の装置との接続が正常に戻ったと判断することを特徴とする過大信号防止装置。 - 請求項1乃至5の何れか1項に記載の過大信号防止装置において、
前記伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号は、同期信号、制御信号又はその双方であることを特徴とする過大信号防止装置。 - 請求項1乃至6の何れか1項に記載の過大信号防止装置を含む交換機。
- 正常時に第1の装置から第2の装置に伝送される伝送信号以外の1以上の信号であって前記伝送信号の伝送に必須な信号のパターンを基に、前記第1の装置と前記第2の装置との間の接続が正常であるのか異常であるのか入力音声信号が正常であるか異常であるかを検出する接続状態判断ステップと、
前記接続状態判断ステップにより前記第1の装置と前記第2の装置との間の接続が正常であると判断された期間に、前記第1の装置が出力した前記伝送信号を出力先に出力し、前記接続状態判断ステップにより前記第1の装置と前記第2の装置との間の接続が異常であると判断された期間に、ゼロレベル信号を前記出力先に出力するゼロレベル信号挿入ステップと、
を備えることを特徴とする過大信号防止方法。
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AU2011259536A AU2011259536B2 (en) | 2010-05-26 | 2011-02-18 | Excessive-signal prevention apparatus and method therefor |
CA2790514A CA2790514C (en) | 2010-05-26 | 2011-02-18 | Excessive-signal prevention apparatus and method therefor |
US13/638,381 US8417182B2 (en) | 2010-05-26 | 2011-02-18 | Excessive-signal prevention apparatus and method therefor |
EP11786380.3A EP2579610B1 (en) | 2010-05-26 | 2011-02-18 | Excessive-signal prevention apparatus and method therefor |
CN201180018794.9A CN102823269B (zh) | 2010-05-26 | 2011-02-18 | 过量信号防止设备及其方法 |
HK13102801.0A HK1175913A1 (en) | 2010-05-26 | 2013-03-06 | Excessive-signal prevention apparatus and method therefor |
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JP2010120323A JP4748490B1 (ja) | 2010-05-26 | 2010-05-26 | 過大信号防止装置及びその方法 |
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2010
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2011
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JP2000036869A (ja) * | 1998-07-17 | 2000-02-02 | Nec Eng Ltd | 電話機種別の識別機能を備えた電話交換装置 |
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AU2011259536B2 (en) | 2013-12-05 |
HK1175913A1 (en) | 2013-07-12 |
CA2790514C (en) | 2013-02-05 |
EP2579610A1 (en) | 2013-04-10 |
JP2011250070A (ja) | 2011-12-08 |
EP2579610B1 (en) | 2014-08-20 |
CN102823269B (zh) | 2014-04-02 |
CN102823269A (zh) | 2012-12-12 |
JP4748490B1 (ja) | 2011-08-17 |
US20130029594A1 (en) | 2013-01-31 |
EP2579610A4 (en) | 2013-10-23 |
AU2011259536A1 (en) | 2012-10-11 |
CA2790514A1 (en) | 2011-12-01 |
US8417182B2 (en) | 2013-04-09 |
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