JPH0376321A - N to 1 line changeover device - Google Patents
N to 1 line changeover deviceInfo
- Publication number
- JPH0376321A JPH0376321A JP21169889A JP21169889A JPH0376321A JP H0376321 A JPH0376321 A JP H0376321A JP 21169889 A JP21169889 A JP 21169889A JP 21169889 A JP21169889 A JP 21169889A JP H0376321 A JPH0376321 A JP H0376321A
- Authority
- JP
- Japan
- Prior art keywords
- line
- signal
- input
- section
- transmission
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 46
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims description 24
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 241000630665 Hada Species 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔概要］
送端局と受端局の中間に伝送信号の分離と挿入を行うＤ
／Ｉ局の中間中継局を有する多重通信システムの、特に
Ｎ本の現用回線に対して１本の予備回線をもつＮ対ｌの
回線切替装置に関し、中間中継局で任意の１つの現用回
線の受信障害を検出して該回線の送端で入力信号を予備
回線へ切替えた時、中間中継局の予備回線の送信部が誤
って送信入力断のアラームＡＬＭ Ｓを送出することの
ないようなＮ対１回線切替装置を目的とし、中間中継局
に、任意の１個の現用回線の受信部の監視部が信号の入
力断を検出した時、検出信号により、受信障害と判断し
た現用回線の入力信号と同じ速度の擬似信号を発生する
ダく一信号発生器と該ダミー信号発生器の出力の擬似信
号を入力し予備回線の送信部へ出力するスイッチを具え
、Ｎ個の現用回線の任意の１回線の受信障害時の回線切
替時に、中間中継局の予備回線の送信部が、ダミー信号
発生器からの擬似信号を入力し、送信部の監視部が誤っ
て送信入力断のアラームを送出しないように構成する。[Detailed description of the invention] [Summary] D that separates and inserts a transmission signal between a sending end station and a receiving end station
/In a multiplex communication system having an intermediate relay station of I station, especially regarding an N to l line switching device having one protection line for N working lines, the switching of any one working line at the intermediate relay station is concerned. N such that when a reception failure is detected and the input signal is switched to the protection line at the sending end of the line, the transmission section of the protection line of the intermediate relay station will not erroneously send out an alarm ALM S indicating that the transmission input is disconnected. Intended as a one-to-one line switching device, when the monitoring section of the receiving section of any one working line detects a signal input disconnection at an intermediate relay station, the input of the working line determined to be a reception failure based on the detection signal. It is equipped with a dummy signal generator that generates a pseudo signal at the same speed as the signal, and a switch that inputs the pseudo signal output from the dummy signal generator and outputs it to the transmission section of the protection line. When switching lines in the event of reception failure on one line, the transmitting section of the backup line of the intermediate relay station inputs a pseudo signal from the dummy signal generator, so that the monitoring section of the transmitting section does not erroneously send out an alarm for transmission input disconnection. Configure it as follows.
本発明は送端局と受端局との中間に伝送信号の分離と挿
入を行うＤ／Ｉ局の中間中継局を有する多重通信システ
ムに係り、特にＮ本の現用回線に対し１本の予備回線を
もつＮ対１の回線切替装置に関する。The present invention relates to a multiplex communication system having an intermediate relay station of a D/I station that separates and inserts transmission signals between a transmitting end station and a receiving end station, and particularly relates to a multiplex communication system having one standby relay station for N working lines. This invention relates to an N-to-1 line switching device having a line.
従来のＮ対１の回線切替装置は、第３図に示す如く、Ｎ
個の入力信号を並列に送信する送信部Ａをもっ送端局１
と該送端局からのＮ個の送信信号を受信する受信部りを
もつ受端局３との中間に、中継局２を有し、Ｎ本の現用
回線ＷＫ、〜ＷＫＮと、その任意の一回線１１Ｋｎの障
害時に入力信号を切替えて伝送する１本の予備回線ＰＴ
ＣＴとで結び、且つ中間の中継局２は、送端局ｌからの
送信信号を分離して受信する受信部Ｂと受信信号を挿入
して送信する送信部Ｃからなる所謂Ｄ／１局（Ｄｒｏｐ
／ Ｉｎ５ｅｒｔ）の中継局であって、予備回線ＰＴＣ
Ｔは、通常は送端局１でＮ本の現用回線の任意の１回線
の人力信号、例えば現用第１回線ＷＫ、の入力信号を、
該回線の送信部Ａ１のハイブリッドＨ３にて予備回線の
送信部へ〇に分岐して中間中継局２に送り、中間中継局
２の予備の受信部Ｂ０のスイッチ２ｏ１を実線の如く通
り送信部Ｃ０により受端局３の受信部Ｄ０へ送り、現用
第１回線の受端スイッチ３□で点線の如く待機している
。その時は、中間中継局２の送信部Ｃ０への入力信号Ｓ
ｉｎの断を監視する送信入力監視部２ｏ、は、入力Ｓ
ｉ、ｌが正常なのでアラームＡＬＭ、を送出しない。そ
してＮ本の現用回線の任意の１回線、例えば現用第２回
線ＷＫ、が送端局１と中間中継局２との間で回線断とな
り受信障害となると、中間中継局２の受信部Ｂｔの入力
断を監視する受信入力監視部２．が受信人力Ｒｉａの断
を検出してアラームＡＬＭ 、を出すと共に、該検出信
号ｄにより自局２の受信部８０〜ＢＮのスイッチ２６１
〜２ｔ１を点線の如く切替え、又検出信号ｄを送端局１
へ送って送端局ｌの送信部ＡｔのスイッチＳＷ、！を点
線の如く切替える。そして現用第２回線−に２の入力信
号を、予備回線ＰＴＣＴの送端の送信部へ〇に送り、中
間中継局２に送って中間中継局２の予備回線の受信部Ｂ
０のスイッチ２．１の点線を通り、現用第２回線のスイ
ッチ２□の点線を通って其の送信部ＣＩに送り、該送信
部Ｃ２から受端局３の受信部Ｄ！へ送信し外部に出力す
る構成となっている。The conventional N-to-1 line switching device, as shown in FIG.
A transmitting terminal station 1 has a transmitter A that transmits input signals in parallel.
and a receiving end station 3 having a receiving section that receives N transmission signals from the sending end station, and a relay station 2, which connects N working lines WK, to WKN and any of them. One backup line PT that switches and transmits input signals in the event of a failure of one line 11Kn
The intermediate relay station 2 connected to the CT is a so-called D/1 station (D/1 station) consisting of a receiving section B that separates and receives the transmitted signal from the transmitting end station I, and a transmitting section C that inserts and transmits the received signal. Drop
/ In5ert) relay station, and is a backup line PTC
Normally, T is the input signal of any one of the N working lines at the transmitting end station 1, for example, the input signal of the first working line WK.
The hybrid H3 of the transmitter A1 of the line branches to the transmitter of the protection line to the intermediate relay station 2, and passes through the switch 2o1 of the backup receiver B0 of the intermediate relay station 2 as shown by the solid line to the transmitter C0. It is sent to the receiving unit D0 of the receiving end station 3, and is on standby at the receiving end switch 3□ of the working first line as shown by the dotted line. At that time, the input signal S to the transmitter C0 of the intermediate relay station 2
The transmission input monitoring unit 2o that monitors the disconnection of the input S
Since i and l are normal, alarm ALM is not sent. If any one of the N working lines, for example the second working line WK, is disconnected between the transmitting end station 1 and the intermediate relay station 2, resulting in a reception failure, the receiving section Bt of the intermediate relay station 2 Reception input monitoring unit that monitors input interruption 2. detects the disconnection of the receiving power Ria and issues an alarm ALM, and the detection signal d causes the receiving section 80 of the own station 2 to switch 261 of the BN.
~2t1 is switched as shown by the dotted line, and the detection signal d is switched to the sending terminal station 1.
and the switch SW of the transmitting section At of the transmitting end station L, ! Switch as shown in the dotted line. Then, the input signal of 2 is sent to the working second line - to the transmitting unit at the sending end of the protection line PTCT, and is sent to the intermediate relay station 2, where it is sent to the receiving unit B of the protection line of the intermediate relay station 2.
0 through the dotted line of the switch 2.1 of the working second line, and the dotted line of the switch 2□ of the working second line to the transmitting section CI, and from the transmitting section C2 to the receiving section D! of the receiving end station 3! The configuration is such that the data is sent to and output to the outside.
従来のＮ対１の回線切替装置は、上述の如く動作し、中
間中継局２の予備回線の送信部Ｃ０は、通常時はＮ個の
現用回線の１つ現用第１回線ＷＫ、の入力信号をハイブ
リッドＨ，で分岐した送信信号を受信部Ｂ０で受信した
受信信号を送信し、其の送信入力監視部２ｏｓは送信入
力断のアラームＡＬＭ ｓを送出せず正しい表示をする
が、現用第２回線−に２が送端局ｌと中間中継局２との
間で回線断を起こして受信障害となった時は、中間中継
局２の受信部Ｂｔの受信入力監視部２ｏが受信入力の断
を検出し自局２の受信部Ｂ０〜Ｂ、のスイッチ２ｏ１〜
２ｇ＋を点線の如く切替え、送端局１の送信部１ｔのス
イッチＳＷ＋ｇを点線の如く切替え、現用第２回線−に
２の入力信号を、中間中継局２の予備回線の受信部Ｂ、
のスイッチ２□から第２回線の受信部Ｂ２のスイッチ２
□を点線の如く通過し、その送信部Ｃ２から受端局３へ
送信する。そして回線断となった現用第２回線−に２の
信号に対しては中間中継局２の予備回線の受信部Ｂ０は
正しい回線切替を行うが、中間中継局２の予備回線の送
信部Ｃ０は、受信部Ｂ０のスイッチ２．１の切替により
其の入力信号が断となるので、送信部Ｃ０の送信入力監
視部２ｏ、が送信入力断のアラームＡＬＭ ｓを出して
誤表示をするという問題があった。本発明は、中間中継
局にてＮ個の現用回線の１つの受信障害を検出し該回線
の入力信号を予備回線へ切替えた時に、中間中継局の予
備回線の送信部が誤って送信入力断のアラームＡＬＭ
ｓを出すことのないようなＮ対１の回線切替装置の提供
を課題とする。The conventional N-to-1 line switching device operates as described above, and the transmission section C0 of the protection line of the intermediate relay station 2 normally receives the input signal of the first working line WK, one of the N working lines. The transmission signal branched by the hybrid H is sent as the reception signal received by the reception unit B0, and its transmission input monitoring unit 2os does not send out the transmission input disconnection alarm ALM s and displays correctly, but the current When the line -2 causes a line disconnection between the transmitting end station l and the intermediate relay station 2, resulting in a reception failure, the reception input monitoring unit 2o of the reception unit Bt of the intermediate relay station 2 is detected, and the switches 2o1 to
2g+ as shown by the dotted line, switch SW+g of the transmitting unit 1t of the sending end station 1 as shown by the dotted line, input signal 2 to the working second line -, and the receiving unit B of the protection line of the intermediate relay station 2.
from switch 2 □ to switch 2 of receiving section B2 of the second line.
The signal passes through □ as shown by the dotted line, and is transmitted from the transmitter C2 to the receiving end station 3. Then, in response to the signal of 2 on the working second line which has been disconnected, the receiver B0 of the protection line of the intermediate relay station 2 performs correct line switching, but the transmitter C0 of the protection line of the intermediate relay station 2 When the switch 2.1 of the receiving section B0 is switched, the input signal is cut off, so the transmission input monitoring section 2o of the transmitting section C0 issues an alarm ALM s indicating that the transmission input is cut off, causing an incorrect display. there were. The present invention provides a system in which, when an intermediate relay station detects a reception failure in one of N working lines and switches the input signal of the line to the protection line, the transmission section of the protection line of the intermediate relay station accidentally disconnects the transmission input. alarm ALM
An object of the present invention is to provide an N-to-1 line switching device that does not issue s.
この課題は、第１図の如く、中間中継局２に、障害とな
った１つの現用回線ＷＫｎの受信部２□の受信入力監視
部２ｎＲの検出信号ｄにより、受信障害と判断された現
用回線−Ｋｎの送端の入力信号と同じ速度の擬似信号を
発生するダミー信号発生器２、．３と、該ダミー信号発
生器の出力の擬似信号を入力し予備回線の送信部２ｏア
ヘ送出するスイッチ２ｏ４を具え、Ｎ個の現用回線の任
意の１回線ＷＫｎの受信障害時の入力信号の予備回線へ
の切替時に、中間中継局の予備回線の送信部２．７が、
ダミー信号発生器２ｎＲからの擬似信号を入力して、送
信部２ｏ丁の送信入力監視部２０５がアラーム＾ＬＭ
、を誤って送出しないようにした本発明によって解決さ
れる。As shown in Fig. 1, this problem is caused by the detection signal d of the reception input monitoring unit 2nR of the receiving unit 2□ of the working line WKn of the working line WKn, which is determined to be a reception failure, being sent to the intermediate relay station 2. A dummy signal generator 2, . 3, and a switch 2o4 that inputs the pseudo signal output from the dummy signal generator and sends it to the transmission section 2oA of the protection line, which provides a backup for the input signal in the event of a reception failure on any one line WKn of the N working lines. When switching to the line, the transmission section 2.7 of the protection line of the intermediate relay station
By inputting the pseudo signal from the dummy signal generator 2nR, the transmission input monitoring section 205 of the transmitting section 2o sets an alarm ^LM
, is solved by the present invention, which prevents the erroneous sending of the .
本発明のＮ対１の回線切替装置の基本構成を示す第１図
の原理図において、
１は、Ｎ個の信号を入力し、常時はＮ個の現用間’＄ｈ
Ｋ、〜ＷＫＮで中間中継局２を経て受端局３へ送信する
スイッチ１目〜Ｉ Ｎ＋を内蔵する送信部ｈ〜ＩＮの送
端局であって、Ｎ個の入力信号の少くとも１個（例えば
現用第１回線ＷＫＩの人力信号）をハイブリッド１１□
で２分岐し、予備回線ＰＴＣＴの送信部１゜に送り該送
信部１０から予備回線で中間中継局２を経て受端局３へ
送信する。そして中間中継局２で１つの現用回線−Ｋｎ
の受信部２ ｎｌが、受信入力の断の受信障害を検出し
た時、障害となった現用間ｐＷＫｎの送端の送信部ｌ、
ｌのスイッチ１０を動作させ、其の現用回線−Ｋｎの入
力信号を切替えて予備回線の送信部１゜へ送出する。In the principle diagram of FIG. 1 showing the basic configuration of the N-to-1 line switching device of the present invention, 1 inputs N signals, and normally connects N working signals to '$h'.
K, ~WKN, which transmits to the receiving end station 3 via the intermediate relay station 2, the first switch ~I N+ is a transmitting unit h~IN transmitting end station that transmits at least one of the N input signals. (for example, the human signal of the working first line WKI) to the hybrid 11□
The signal is then branched into two, sent to the transmitter 1° of the protection line PTCT, and transmitted from the transmitter 10 to the receiving end station 3 via the intermediate relay station 2 on the protection line. and one working line at intermediate relay station 2 -Kn
When the receiving unit 2 nl detects a reception failure due to disconnection of the reception input, the transmitting unit l at the sending end of the working pWKn that has caused the failure,
The switch 10 of Kn is operated to switch the input signal of the working line -Kn and send it to the transmission section 1 of the protection line.
２は、送端局１からの１個の予備回線ＰＴＣＴの送信信
号とＮ個の現用回線ＷＫ、〜ＷＫＮの送信信号とを分離
して受信する、スイッチ２ｏ１．を有する予備の受信部
２ｏ８とスイッチ２□〜２□を有する現用の受信部２ｎ
ＲＲ〜２□と、該受信部の出力を夫々挿入し送信する予
備の送信部２．７と現用の送信部２ｎＲ゜〜２Ｎアから
なる中間中継局である。2 is a switch 2o1. A spare receiving section 2o8 having the following functions and a working receiving section 2n having switches 2
This is an intermediate relay station consisting of RR~2□, a backup transmitter 2.7 into which the output of the receiver is inserted and transmitted, and a working transmitter 2nR~2Na.
２＋ｚ〜２ Ｈｚは、中間中継局２のＮ個の現用の受信
部２＋ｌ〜２□の夫々の入力信号Ｒｉｎを監視する受信
入力監視部であって、該入力信号ＲＬｎの断を検出した
時に受信アラームＡＬＭ ｓｒを送出する。2+z to 2 Hz is a reception input monitoring unit that monitors the input signal Rin of each of the N active reception units 2+l to 2□ of the intermediate relay station 2, and when a disconnection of the input signal RLn is detected, the reception input monitoring unit Send alarm ALM sr.
２ｎＲ３〜２ Ｎ３は、中間中継局２のＮ個の現用の受
信部２目〜２■の受信入力監視部２ｏ〜２□の各検出信
号により、受信入力断と検出された現用回線ＷＫｎの送
端における入力信号と同じ速度の擬似信号を発生するダ
ミー信号発生器である。2nR3 to 2N3 detects the transmission of the working line WKn where reception input disconnection is detected by each detection signal of the reception input monitoring units 2o to 2□ of the N working reception units 2 to 2■ of the intermediate relay station 2. It is a dummy signal generator that generates a pseudo signal at the same speed as the input signal at the end.
２ｏは、中間中継局２の予備の受信部２ｏの内部のスイ
ッチであって、中間中継局２の受信部２、の受信入力監
視部２ｎＲでＮ個の現用回線のうちの任意の１回線ＷＫ
ｎの受信障害が検出された時、その検出信号ｄにより駆
動され発生したダミー信号発生器２ ｎｌの出力の擬似
信号を入力し、中間中継局２の予備の送信部２０Ｔへ出
力する。2o is a switch inside the backup receiving section 2o of the intermediate relay station 2, and a reception input monitoring section 2nR of the receiving section 2 of the intermediate relay station 2 selects any one line WK of the N working lines.
When a reception failure of n is detected, the pseudo signal generated by the output of the dummy signal generator 2 nl driven by the detection signal d is inputted and output to the backup transmitter 20T of the intermediate relay station 2.
２ｏは、中間中継局２の予備の送信部２ｏ、の入力信号
を監視する送信入力監視部であって、予備の受信部２□
からの信号人力Ｓ ｉｎの断を検出した時に、送信入力
断のアラームＡＬＭ ｓを送出するが、Ｎ個の現用回線
の任意の１回線−Ｋｎの受信入力が断の時に受信入力監
視部２ ｎｔが出力する検出信号ｄにより発生されたダ
ミー信号発生器２ｏの出力の擬似信号を、受信部２ｏの
内部のスイッチ２．４を介して入力して、送信入力断の
アラームＡＬＭ ｓを送出しないように構成する。2o is a transmission input monitoring unit that monitors the input signal of the backup transmitter 2o of the intermediate relay station 2, and is connected to the backup receiver 2□.
When detecting a disconnection of the signal signal S in from the input terminal S in , the alarm ALM s for transmitting input disconnection is sent out, but when the receive input of any one of the N working lines - Kn is disconnected, the reception input monitoring unit 2 nt A pseudo signal of the output of the dummy signal generator 2o generated by the detection signal d outputted by the receiver 2o is inputted via the switch 2.4 inside the receiver 2o so as not to send out the alarm ALM s of the transmission input disconnection. Configure.
中間中継局２のＮ個の現用の受信部２ｎＲ１１〜２ Ｍ
ｌは、送端局１からのＮ個の現用回線ＷＫ、−ＷＫ、の
送信信号を受信し、その任意の１つ現用回線ＷＫｎの受
信入力が断となった時に、受信部２□の受信人力監視部
２□が該受信入力の断を検出し、その検出信号ｄにより
、自局２の受信部２ｎＲｍのスイッチ２□を点線の如く
切替えると共に現用回線ＷＫｎの送端局１の送信部１７
のスイッチ１□を駆動し、其の入力信号−に７を予備の
送信部１゜へ送り予備回線ＰＴＣＴで中間中継局２へ送
る。中間中継局２は、送端局１の予備の送信部１゜から
の現用回線−に７の信号を、予備回線の受信部２□のス
イッチ２□を経て現用回線ＷＫｎの受信部２．、ｌのス
イッチ２□の点線を通し、送信部２ ｎｒへ送り、送信
部２ｎＲから受端局３へ送信して受端局３の受信部３、
のスイッチ３１を経て外部に出力して、障害となった現
用回線ＷＫｎの回線切替を完了する。その時、中間中継
局２の予備の送信部２．７の送信入力監視部２ｏ、は、
現用回線ＷＫｎの受信入力が断の時に受信入力監視部２
□が出力する検出信号ｄによりダミー信号発生器２．３
が発生した擬似信号を入力するので、誤って送信入力断
のアラームＡＬＭ 、を−送出せず問題は解決される。N active receiving units 2nR11 to 2M of intermediate relay station 2
l receives the transmission signals of N working lines WK, -WK, from the transmitting end station 1, and when the reception input of any one of the working lines WKn is disconnected, the receiving unit 2□ receives the transmission signals. The human power monitoring unit 2□ detects the disconnection of the receiving input, and based on the detection signal d, switches the switch 2□ of the receiving unit 2nRm of its own station 2 as shown by the dotted line, and also switches the transmitting unit 17 of the transmitting end station 1 of the working line WKn.
The switch 1□ is driven, and its input signal -7 is sent to the backup transmitter 1° and sent to the intermediate relay station 2 via the backup line PTCT. The intermediate relay station 2 transmits the signal 7 from the backup transmitter 1° of the sending end station 1 to the working line - through the switch 2□ of the receiver 2□ of the protection line to the receiver 2. , l through the dotted line of the switch 2□, and sends it to the transmitter 2nr, and transmits it from the transmitter 2nR to the receiving end station 3, and then transmits it to the receiving end station 3 of the receiving end station 3.
The signal is output to the outside via the switch 31, and line switching of the faulty working line WKn is completed. At that time, the transmission input monitoring unit 2o of the backup transmission unit 2.7 of the intermediate relay station 2,
When the reception input of the working line WKn is disconnected, the reception input monitoring unit 2
The dummy signal generator 2.3 uses the detection signal d outputted by □.
Since the pseudo signal that is generated is inputted, the problem is solved without accidentally sending out the alarm ALM indicating that the transmission input is disconnected.
第１図の原理図は、そのまま本発明の実施例のＮ対ｌの
回線切替装置の構成を示し、既に詳述した。第２図は本
発明の実施例の中間中継局の受信部の構成を示す回路図
であって、現用回線の数ＮがＮ・３の場合である。The principle diagram of FIG. 1 directly shows the configuration of an N-to-I line switching device according to an embodiment of the present invention, which has already been described in detail. FIG. 2 is a circuit diagram showing the configuration of the receiving section of the intermediate relay station according to the embodiment of the present invention, in the case where the number N of working lines is N.3.
第２図の回路図において、中間中継局の予備回線１’Ｔ
ｃＴの受信部２０１１は、スイッチ２ｏ１ とスイッチ
２ｏ４の直列接続で構成され、通常時は、図示しない送
端局の送信部１ｏからの現用第１回線ＷＫ、の入力信号
の分岐信号の受信信号を、スイッチ２ｏ、に入力し、ス
イッチ２０４から予備の送信部２０丁へ出力する。又、
３個の現用回線−Ｋｌ−ＷＫ３の受信部２□、２□＋
２３１は夫々、スイッチ２□−１，２□１．２ｎＲ□。In the circuit diagram of Figure 2, the backup line 1'T of the intermediate relay station
The receiving section 2011 of the cT is composed of a switch 2o1 and a switch 2o4 connected in series, and normally receives a received signal of a branch signal of the input signal of the working first line WK from the transmitting section 1o of the transmitting end station (not shown). , switch 2o, and output from switch 204 to 20 spare transmitters. or,
Three working lines-Kl-WK3 receiving section 2□, 2□+
231 are switches 2□-1, 2□1.2nR□, respectively.
２、コ、スイッチ２２ ＋ −１＋ ２２ｎＲ−２＋
２！！＋ ２２３ 、スイッチ２□−１，２□−ｚ＋２
＋ｚ＋２ｓｓで構成され、３個の現用回線−に、〜匈に
３の例えば第２現用回線ＷＫ、の受信回線が障害となり
、中間中継局の第２現用回線の受信入力監視部２ｏのＲ
ｉｎ検出器が、受信入力の断を検出してアラームＡＬＭ
えを出した場合、其の検出信号ｄにより、上記予備回線
ＰＴＣＴの受信部２ｏえのスイッチ２＋、２．４と第２
現用回線ＷＫ、の受信部２□のスイッチ２□−１２□ｔ
−ｔ＋２□８．２□、の可動接片を点線の如く接続する
。そして受信部２．のスイッチ２．１が、図示しない送
端局１の送信部りから送信部１゜を経て入力する現用第
２回線−に２の信号を、点線の如く通り第１回線の受信
部２□のスイッチ２ｏ、２ｏを経て第２回線の受信部２
□のスイッチ２ｚｓ、２□４を通り第２回線の送信部２
８７へ送出して障害となった第２現用回線−に２の回線
切替を完了する。それと同時に、受信入力監視部２ｔ＊
の検出信号ｄにより、ダミー信号発生器２！３を起動し
前記の障害となった第２現用回線−に２の送端の入力信
号と同じ伝送速度の擬似信号を発生し、現用第２回線ｗ
Ｋｇの受信部２□のスイッチ２２ｇの出力側に入力し、
現用第３回線−に、の受信部２■のスイッチ２３３１２
３！を経て、予備回線ＰＴＣＴの受信部２ｏのスイッチ
２．４に入力し、その点線の接片を通って予備の送信部
２ｏｒへ送出する。従って図示しない予備回線の送信部
２ｏアの送信入力監視部２ｏは、ダミー信号発生器２ｏ
が発生した擬似信号を入力するので、送信入力断のアラ
ームＡＬＭ ｓを送出せず問題は無い。2. Switch 22 + -1+ 22nR-2+
2! ! + 223, switch 2□-1, 2□-z+2
+z+2ss, and the receiving line of the 3 working lines -, for example, the 2nd working line WK, becomes a failure, and the R of the reception input monitoring unit 2o of the 2nd working line of the intermediate relay station
in detector detects disconnection of reception input and issues an alarm ALM
If a detection signal d is detected, the switches 2+, 2.4 and the second switch of the receiving section 2o of the protection line PTCT are
Switch 2□-12□t of receiving section 2□ of working line WK
Connect the movable contact pieces of -t+2□8.2□ as shown in the dotted lines. and receiving section 2. The switch 2.1 sends the signal 2 to the working second line which is input from the transmitting unit of the transmitting end station 1 (not shown) through the transmitting unit 1゜ to the receiving unit 2□ of the first line as shown by the dotted line. Receiving section 2 of the second line via switches 2o and 2o
Pass through the switches 2zs and 2□4 of □ to the transmitting section 2 of the second line.
87 to complete line switching to the second working line which caused the failure. At the same time, the reception input monitoring section 2t*
In response to the detection signal d, the dummy signal generator 2!3 is activated to generate a pseudo signal having the same transmission speed as the input signal at the sending end of 2 to the faulty second working line. lol
Input to the output side of the switch 22g of the Kg receiving section 2□,
Switch 23312 of the receiving section 2 of the working third line -
3! The signal is then input to the switch 2.4 of the receiving section 2o of the protection line PTCT, and is transmitted to the protection transmitting section 2or through the dotted line contact. Therefore, the transmission input monitoring section 2o of the transmission section 2oa of the protection line (not shown) is a dummy signal generator 2o.
Since the pseudo signal generated by this is input, there is no problem because the alarm ALM s indicating that the transmission input is disconnected is not sent out.
以上説明した如く、本発明によれば、回線切替時に、中
間中継局の予備回線で送信入力断のアラームを誤って発
生することが防止されるので、Ｎ対ｌの回線切替装置の
誤表示を無くす効果が得られる。As explained above, according to the present invention, when switching lines, it is possible to prevent erroneously generating a transmission input disconnection alarm on the backup line of an intermediate relay station, thereby preventing the erroneous display of the N to 1 line switching device. You can get the effect of eliminating it.
第１図は本発明のＮ対ｌの回線切替装置の基本構成を示
す原理図、
第２図は本発明の実施例の中間中継局の受信部の構成を
示す回路図、
第３図は従来のＮ対ｌの回線切替装置のブロック図であ
る。 図において、
１は送端局、２は中間中継局、２ｏえは予備回線の受信
部、２＋、 ２ｏａはスイッチ、２．％Ｒは任意の現用
回線の受信部、２、は受信入力監視部、２７．はダ１３
０−Fig. 1 is a principle diagram showing the basic configuration of an N to l line switching device of the present invention, Fig. 2 is a circuit diagram showing the configuration of a receiving section of an intermediate relay station according to an embodiment of the present invention, and Fig. 3 is a conventional diagram. FIG. 2 is a block diagram of an N-to-l line switching device. In the figure, 1 is a transmitting end station, 2 is an intermediate relay station, 2o is a protection line receiving section, 2+, 2oa are switches, 2. %R is a receiving section of any working line, 2 is a receiving input monitoring section, 27. Hada 13
0-
Claims (1)
用回線（ＷＫ＿１〜ＷＫ＿Ｎ）により送信し、該現用回
線の任意の１個（ＷＫｎ）の障害時は１個の予備回線（
ＰＴＣＴ）に切替えて送信し、受信する受端局（３）と
の中間で信号を分離して受信する受信部と該受信信号を
挿入して送信する送信部からなる中間中継局（２）で中
継して、受端局（３）へ送信するＮ対１の回線切替装置
において、 該中間中継局に、任意の１個の現用回線（ＷＫｎ）の受
信部（２＿ｎ＿Ｒ）で信号の入力断を検出する監視部（
２＿ｎ＿２）の検出信号（ｄ）により受信障害と判断さ
れた現用回線（ＷＫｎ）の入力信号と同じ速度の擬似信
号を発生するダミー信号発生器（２＿ｎ＿３）と該ダミ
ー信号発生器の出力の擬似信号を入力し予備回線の送信
部（２＿ｏ＿Ｔ）へ出力するスイッチ（２＿ｏ＿４）を
具え、Ｎ個の現用回線の任意の１回線（ＷＫｎ）の受信
障害時の予備回線への切替時に、中間中継局の予備回線
の送信部（２＿ｏ＿Ｔ）が、ダミー信号発生器（２＿ｎ
＿３）からの擬似信号を入力し該送信部（２＿ｏ＿Ｔ）
の監視部（２＿ｏ＿５）が誤って送信入力断のアラーム
（ＡＬＭ＿ｓ）を送出しないことを特徴としたＮ対１の
回線切替装置。[Claims] N input signals are normally transmitted from the transmitting end station (1) through N working lines (WK_1 to WK_N), and when any one of the working lines (WKn) fails. is one backup line (
An intermediate relay station (2) consisting of a receiving unit that separates and receives the signal and a transmitting unit that inserts and transmits the received signal between the receiving end station (3) that switches to PTCT) and receives the signal. In the N-to-1 line switching device that relays and transmits to the receiving end station (3), the signal input is interrupted at the receiving unit (2_n_R) of any one working line (WKn) at the intermediate relay station. Monitoring unit to detect (
A dummy signal generator (2_n_3) that generates a pseudo signal of the same speed as the input signal of the working line (WKn) determined to be a reception failure based on the detection signal (d) of 2_n_2), and a pseudo signal output from the dummy signal generator. It is equipped with a switch (2_o_4) that inputs the signal and outputs it to the transmission section (2_o_T) of the protection line. The transmission section (2_o_T) of the protection line is connected to the dummy signal generator (2_n
The pseudo signal from _3) is input to the transmitter (2_o_T).
An N-to-1 line switching device characterized in that the monitoring unit (2_o_5) of the monitor (2_o_5) does not erroneously send out an alarm (ALM_s) indicating that the transmission input is disconnected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21169889A JPH0376321A (en) | 1989-08-17 | 1989-08-17 | N to 1 line changeover device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21169889A JPH0376321A (en) | 1989-08-17 | 1989-08-17 | N to 1 line changeover device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0376321A true JPH0376321A (en) | 1991-04-02 |
Family
ID=16610112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21169889A Pending JPH0376321A (en) | 1989-08-17 | 1989-08-17 | N to 1 line changeover device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0376321A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5423810B2 (en) * | 2009-12-21 | 2014-02-19 | 日本電気株式会社 | Optical transmission system and optical transmission method |
-
1989
- 1989-08-17 JP JP21169889A patent/JPH0376321A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5423810B2 (en) * | 2009-12-21 | 2014-02-19 | 日本電気株式会社 | Optical transmission system and optical transmission method |
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