201126930 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種使脈衝試驗光於敷設於第丨站台與第2 站台，間之光纖傳送路徑上傳播，並根據該脈衝試驗光之 傳播時所產生之後方散射光而監視該第1站台與第2站台間 所進行之光傳送的裝置。 【先前技術】 光纖傳送系統係經由敷設於第丨站台（例如基地台）與第2 站台（例如用彳家）之間之光纖傳送路徑進行信號光之發送 接收。其中m站台與複數之第2站台經由分離器並藉 由光纖傳送路徑而連接之系統被稱作p〇N(Passive201126930 VI. Description of the Invention: [Technical Field] The present invention relates to a method in which a pulse test light is spread on an optical fiber transmission path between a second station and a second station, and the light is propagated according to the pulse. A device that monitors the light transmission between the first station and the second station by generating scattered light. [Prior Art] The optical fiber transmission system transmits and receives signal light via a fiber transmission path between a second station (e.g., a base station) and a second station (e.g., a home). The system in which the m station and the second station of the plurality are connected via the splitter and through the optical fiber transmission path is called p〇N (Passive).
Network，被動式光網路）系統。於此種光纖傳送系統中， 監視光纖傳送路徑之狀態較為重要，又，監視設置於第丄 站台及第2站台各者中之信號光傳送設備亦較為重要。 專利文獻1中揭示有一種意圖確定光纖傳送系統中發生 某些傳送異常時之原因的發明。該專利文獻丨所揭示之發 明中，係針對複數條光纖傳送路徑設置—個光開關及一個 光傳送監視裝置，複數條光纖傳送路徑分別依序經由光開 關而光學性連接於光傳送監視裝置。_，複數條光纖傳送 路徑分別依序被光傳送監視裝置所監視。 先行技術文獻 專利文獻 專利文獻1:日本專利特開平5-199191號公報 【發明内容】 146466.doc 201126930 發明所欲解決之問題 發明者們經過對先前之光傳送監視裝置進行 ㈣以下之闕1，上述專利文⑴所揭示之發明^ =光路徑中之某—條光纖傳送路徑上發生傳 u時，為確疋發生該異常之 該傳送異常之原因有路&進而判定 油 要化費較長時間。例如，當個宏 傳送路徑包含2000條光纖傳送路徑、並幻條光纖傳^ 二之4驗需要1分鐘時’―但鳩條光纖傳送路徑中 一條光纖傳送路徑上發生傳送異常’則直至對該光纖傳送 =進行試驗為止，最壞之情形時需要2_分鐘⑴3小 時），從而即時性欠佳。 又，當接收到來自光傳送系統之心（例如作為第2站a :用戶家之用戶)之異常報告後，亦考慮針對到達該第二 =先纖傳送路徑實施試驗。然而，此時，成為被動之光 :送系統之維持活動’從而應對來自用戶之異常報告或系 、洗之維持需要花費時間及費用。 明係⑽解決上述課題而完成者’其目的在於提供 :種包含如下構造之光傳送監視裝置，該構造用於當在包 3自第1站台至第2站台之光纖傳送路徑之信號光之傳播路 徑上發生傳送異常時能夠及早判定該異常原因。 解決問題之技術手段 本發明之光傳送監視裝置係使脈衝試驗光於一個或一個 以上之傳送路徑單元中之成為監視對象之傳送路徑單元中 傳播並根據該脈衝試驗光之傳播時所產生之後方散射Network, passive optical network) system. In such an optical fiber transmission system, it is important to monitor the state of the optical fiber transmission path, and it is also important to monitor the signal optical transmission equipment provided in each of the second station and the second station. Patent Document 1 discloses an invention intended to determine the cause of occurrence of some transmission abnormality in a fiber delivery system. In the invention disclosed in the patent document, an optical switch and an optical transmission monitoring device are provided for a plurality of optical fiber transmission paths, and the plurality of optical fiber transmission paths are optically connected to the optical transmission monitoring device via optical switches in sequence. _, a plurality of optical fiber transmission paths are sequentially monitored by the optical transmission monitoring device. CITATION LIST Patent Literature Patent Literature 1: Japanese Patent Laid-Open No. Hei 5-199191-A SUMMARY OF THE INVENTION 146466.doc 201126930 Problem to be Solved by the Invention The inventors have performed (4) the following on the conventional optical transmission monitoring device. In the invention disclosed in the above patent (1), when a transmission u occurs in a certain optical fiber transmission path in the optical path, it is determined that there is a reason for the transmission abnormality in which the abnormality occurs, and further, it is determined that the oil is expensive. time. For example, when a macro transmission path includes 2,000 optical fiber transmission paths, and the magic strip optical fiber transmission is required for 1 minute, the transmission abnormality occurs on one optical fiber transmission path in the optical fiber transmission path until the macro transmission path Fiber transmission = 2 months (1) 3 hours) in the worst case, so the immediacy is not good. Further, after receiving an abnormality report from the heart of the optical transmission system (for example, as the second station a: the user of the user's home), it is also considered to perform the test for reaching the second = fiber-optic transmission path. However, at this time, it becomes a passive light: the maintenance activity of the delivery system is required to cope with the abnormal report from the user or the maintenance of the system and the washing, which takes time and expense. The present invention has been made in order to provide an optical transmission monitoring apparatus including a configuration for transmitting signal light of a fiber transmission path from the first station to the second station in the packet 3. The cause of the abnormality can be determined early when a transmission abnormality occurs on the path. Means for Solving the Problem The optical transmission monitoring apparatus of the present invention causes a pulse test light to propagate in a transmission path unit that is a monitoring target in one or more transmission path units, and generates a posterior side when the light is propagated according to the pulse. scattering
[S 146466.doc 201126930 光，對監視對象之光傳送進行監視。 — 上之傳送路徑單元分別包含第’―個或一個以 第1站台與第2站台之間之光纖傳種及f:於 個以上之傳送路徑單元各者作為監視候匕種一個或一 監視裝置’係包含監視部、測定部、⑼合:及之二光:送 具體而言’監視部為監視—個或及…二 元各自之光傳送狀態，而確定 之傳送路徑單 元之第1Λ 屬於成為監視對象之傳送路徑單 視對象中之傳送Λ之有Γ或接收之狀況，檢測該監 上之傳送路徑單二：！測定部係將自-個或-個以 單元所, &視部作為監視對象之傳送路徑 早：：獲仔的測定資料，作為該等一個或—個以二:: 路徑單7G各自之基準資料而β ^ ^ ^ ^ ^ ^ 达 為監視對象之傳送路經單…此時測-部對屬於成 * ’並接收該脈衝試驗光所傳播:傳==出:衝試驗 J的後方散射光，藉此取得該後方散射光== 變化資料。弁翹八加〆 凡心烛戾之蛉間性 .„ σ。系將自測定部輸出之脈衝試驗光#人 到屬於由監視部作為監 大驗先執合 路徑，並將脈衝試驗光所值搞 早70之光纖傳送 之後方#… 所傳播之、於光纖傳送路徑内產生 ❻合於測定部。判定部係判定 因之判：係徑單元之異常原因。又，該異常原 蕻、、稭由監視部撿測出之傳送異常之狀況、及 定部所取得之後方散射光之強度之時間性變: 146466.do, 201126930 再者，應監視之傳送異常中包含第丨站台與第2站二 無法傳播信號光之狀況（以下，稱作傳送中斷）。D之間 之位元錯誤率之增加等。又，此種傳送異常之原== 第1站台側及第2站台側之至少任一者中之發送器異a二3 收器異料設備異常、光纖傳送路控 ==或接 一 尤纖傳误敗 徑中之損耗異常、及極化波異常等特性異常等。 、 本發明之光傳送監視裝置中，光耦合部係包含與— -個以上之傳送路徑單元對應而設置之光合波分固或 開關部。 /态、及 光合波分波器各自含有經由對應之光纖傳送路徑 光學性連接於第1站台及第2站台之第1連接埠及第^接 埠，且含有使脈衝試驗光相合於對應之光纖傳送路經 且用於萃取該脈衝試驗光所傳播之、於對應之光 财產生之後方散射光的測定科。又，„部係具= 刀別屬於-個或-個以上之傳送路徑單元之光合波分波考 =定科之任-者與敎部光學性連接之構造，該構造 精由光開關、計測控制部而實現。此處，光開關係包含愈 t合波分波器之測定用埠各自.對應而設置之第1輸入輸出、 璋、及光學性連接於測定部之第2輸入輸出璋。 部係用於將第2輸入.輸出埠光學性連接於第！輸入輸出痒中 之與屬於成為監視對象之傳送路徑單元之光合波分波哭之 測定用埠對應的第〗輸入輸出埠。 先準边般之構造之光轉合部中，計測控制部根據預 準備之弟1站台之配線資訊（表示第1站台與光纖傳送路r I46466.doc 201126930 徑對應關係之資訊）、及光開關配線資訊（表示光纖傳送路 徑與光開關之連接埠之對應關係之資訊），進行光開關中 之埠切換。然而，該計測控制部中之埠切換之準確性係依 存於預先準備之配線資訊之準確性。即，當所準備之配線 貧訊自身有誤時，有可能將來自測定部之脈衝試驗光發送 至與藉由監視部檢测到傳送異常之第丨站台對應之光纖傳 送路徑不同的屬於其他傳送路徑單元之光纖傳送路徑上。 對此，本發明之光傳送監視裝置亦可包含如下構造：於第 1站台與第2站台之間之光傳送開始之前，自動構築構成一 個傳送路徑單元之第丨站台、光耦合部之測定用埠、及光 纖傳送路徑之對應關係。 可藉由改良具有如上述般之構造 具體而言 — -.W ^ ^ ^ 貫現。例如，光合波分波器之各者係進而包含用於萃取 :之第1站口輸出之# 5虎光之一部分的確認用埠。光 開關係包含：與光合波分波11之確認用埠各自對應而設置 2第3輸入輸出埠，以及藉由計測控制部而與第3輸入輸出 部Π —者光學性連接之第4輸入輸出淳。而•，該開關 埠而包含信號檢測器’其光學性連接於第4輸入輸出 ’：測來自分別屬於一個或一個以上之傳送 元之 弟1站台之任一者之信號光。 根據該構成，光開關之第丨輪 喷八卞 讯八碗出埠分別連接於光合 皮刀波器之測定用埠，第2輸入輪 耠入认 ％出埠連接於測定部，第3 翰入輪出埠分別連接於光合波 入輪Ψ &、 故刀/皮崙之確認用埠，第4輸 ' 阜連接於信號檢測器。光Μ & — 7^開關中之第i及第3輸入輸 146466.doc 201126930 淳之對應為已知，四叩別万…π 一nq益又檢 果’確定已發送信號之第1站台’則可自動構築構成—個 傳送路徑單元之第1站台、光合波分波器之測定用淳、及 光纖傳送路徑之對應關係。 進而’本發明之光傳送監視裝置中，一個或—個以上之 傳送路徑單元中之至少任一傳送路徑單元之信號光傳播路 徑亦可具有多分支構造。具體而言，一個傳送路徑單元包 含：第1站台，分別相當於第2站台之複數之終端台，配置 於第1站台與複數之終端台之間之分離器，及經由光分離 器而敷設於第丨站台與複數之終端台之間之相當於光纖傳 送路徑的多分支光纖傳送路徑。此時，該光傳送監視裝置 係對於配置有分離器之多分支光纖傳送路徑，使脈衝試驗 t自第1站台側朝向複數之終端台侧傳播，並根據其傳播 日年所產生之後方散射光監視第i站台與複數之終端台之 之光傳送。 又，於包含上述多分支光纖傳送路徑之傳送路徑單元 中’且於複數之終端台之任一者與第丄站台之間之光傳送 之開始之前，敎部在第1站台接收到自複數之終端台之 t一者發送之信號光時，取得在多分支光纖傳送路徑内產 之後方散射光之強度之時間性變化資料。該光傳送監視 裝置係於根據藉由測定部所 „ „ π行艾後方散射光之強度之時 竭性吏化資料，確認多分支[S 146466.doc 201126930 Light, monitor the optical transmission of the monitored object. — The transmission path unit includes one or one of the optical fiber between the first station and the second station and f: one or more of the transmission path units as the monitoring device or one monitoring device The system includes a monitoring unit, a measuring unit, and (9): and the second light: the specific monitoring unit is a monitoring unit or a binary optical transmission state, and the first channel of the determined transmission path unit belongs to The transmission path of the monitoring object is detected or received by the transmission target in the single-view object, and the transmission path of the surveillance is detected: In the measurement unit, the transmission path of the target unit and the & view unit is monitored as early: the measured data of the acquired one is used as the basis for each of the one or two:: path list 7G The data and β ^ ^ ^ ^ ^ ^ are the transmission path of the monitoring object... At this time, the measurement-part pair belongs to *' and receives the pulse test light to propagate: pass == out: backscattered light of the test J In order to obtain the backscattered light == change data.弁 八 〆 〆 〆 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡 凡After the transmission of the optical fiber in the early 70th, the propagation is generated in the optical fiber transmission path, and the determination unit determines the cause of the abnormality of the caliper unit. The time difference between the state of the transmission abnormality detected by the monitoring unit and the intensity of the scattered light obtained by the fixed part: 146466.do, 201126930 In addition, the transmission abnormality to be monitored includes the second station and the second station. The situation in which the signal light cannot be transmitted (hereinafter referred to as transmission interruption), the increase in the bit error rate between D, etc. Further, the original transmission error == at least either the first station side and the second station side Among the transmitters, the transmitter is abnormal, the optical fiber transmission path control == or the abnormality of the loss in the transmission path of the fiber, and the abnormality of the polarization wave, etc., etc. In the optical transmission monitoring device, the optical coupling unit includes and - an optical multiplexing or switching unit provided corresponding to one or more transmission path units. Each of the / state and the optical multiplexer/demultiplexer is optically connected to the first station and the second station via the corresponding optical fiber transmission path. The connection port and the second connection port, and the measurement unit for aligning the pulse test light to the corresponding fiber transmission path and for extracting the scattered light after the corresponding light generation is propagated by extracting the pulse test light. „ Departmental ware = knives belong to - or more than one of the transmission path units of the optical multiplexed wave split test = the basis of the syllabus - the optical connection of the scorpion, the structure is finely controlled by the optical switch, measurement control And realized. Here, the light-on relationship includes the first input/output, the 璋, and the second input/output 光学 optically connected to the measurement unit, which are provided for the measurement of the multiplexer/demultiplexer. The department is used to optically connect the second input and output to the first! The input and output itch is the input and output 埠 corresponding to the measurement 光 corresponding to the optical multiplex wave that is the transmission path unit to be monitored. In the light-conversion part of the structure of the front side, the measurement control unit is based on the wiring information of the pre-prepared 1st station (information indicating the relationship between the first station and the optical fiber transmission path r I46466.doc 201126930), and the optical switch Wiring information (information indicating the correspondence between the fiber transmission path and the optical switch), and switching between the optical switches. However, the accuracy of the switching in the measurement control unit depends on the accuracy of the wiring information prepared in advance. In other words, when the prepared wiring information is incorrect, it is possible to transmit the pulse test light from the measuring unit to another transmission that is different from the optical fiber transmission path corresponding to the third station that has detected the transmission abnormality by the monitoring unit. The fiber path of the path unit. In addition, the optical transmission monitoring device of the present invention may include a structure for automatically measuring the second station and the optical coupling unit that constitute one transmission path unit before the optical transmission between the first station and the second station is started.对应, and the corresponding relationship of the fiber transmission path. By modifying the structure as described above, specifically - -.W ^ ^ ^ is achieved. For example, each of the optical multiplexer/demultiplexer further includes a 埠 for confirming one of the #5 虎光 outputs for the first station port. The optical open relationship includes two second input/output ports 与 corresponding to the confirmation of the optical multiplexing wavelength division 11 and a fourth input/output optically connected to the third input/output unit by the measurement control unit. Hey. And, the switch includes a signal detector 'optically connected to the fourth input/output': measuring signal light from any one of the stations 1 belonging to one or more transmission elements. According to this configuration, the first wheel of the optical switch is connected to the measuring bowl of the photo-piercing knife, and the second input wheel is connected to the measuring unit, and the third input is connected. The wheel 埠 is connected to the photosynthetic wave rim and the knives, and the fourth ' ' is connected to the signal detector. Μ amp & — The first and third inputs of the 7^ switch are 146466.doc 201126930 The corresponding correspondence is known, four 万 10,000... π 一 nq benefits and the result 'determine the first station that has sent the signal' The correspondence between the first station constituting one transmission path unit, the measurement 光 of the optical multiplexer/demultiplexer, and the optical fiber transmission path can be automatically constructed. Further, in the optical transmission monitoring apparatus of the present invention, the signal light propagation path of at least one of the one or more transmission path units may have a multi-branch structure. Specifically, one transmission path unit includes: a first station, which corresponds to a plurality of terminal stations of the second station, a separator disposed between the first station and the plurality of terminal stations, and is disposed via the optical splitter. A multi-branch fiber transmission path corresponding to a fiber transmission path between the second station and the plurality of terminal stations. In this case, the optical transmission monitoring device transmits the pulse test t from the first station side toward the plurality of terminal stations on the multi-branch optical fiber transmission path in which the splitter is disposed, and generates a backscattered light according to the propagation date. The optical transmission of the i-th station and the plurality of terminal stations is monitored. Further, before the start of the optical transmission between the plurality of terminal stations and the second station in the transmission path unit including the multi-branch optical fiber transmission path, the top portion receives the self-complex number at the first station. When the signal light transmitted by one of the terminal stations is transmitted, time-varying data of the intensity of the scattered light in the multi-branch optical fiber transmission path is obtained. The light transmission monitoring device confirms the multi-branch by exchanging data according to the intensity of the scattered light by the measuring unit
0叉光緘傳送路徑之分支路徑中的 已連接於發送信號光之終端A ^ , 細σ之分支路徑後，開始第1站 口與發送信號光之終端台之間之光傳送。 146466.doc 201126930 包含如上述般之構造之光傳送監視裝置(本發明之光傳 送監視裝置）中，判^部係於藉由監視部檢測出光傳送之 中，狀態之傳送異常時，判定被檢測到傳送異常之傳送路 k單元之異b原因為第i站台中之信號光傳送設備故障、 第2站台中之信號光傳送設備故障、光纖傳送路徑斷線、 及光纖傳送路徑之損耗異常中之何者。 判定。P可於藉由監視部檢測出光傳㊆中之纟元錯誤率超 過：定值之傳送異常時，判定被檢測到傳送異常之傳送路 I單元之異吊原因為第丨站台中之信號光傳送設備故障、 第2站台中之信號光傳送設備故障、及光纖傳送路徑之 耗異常中之何者' 再者，測定部宜對屬於被檢測到傳送異常之傳送路徑單 元之光纖傳送路徑輸出波長比信號光之波長為長之脈衝試 驗，。此時，#定部可於藉由監視部檢測出光傳送之中斷 狀恶之傳送異常時，判定被檢測到傳送異常之傳送路徑單 凡之異常原因為第1站台巾之信號光傳送設備故障、第2站 台中之信f虎光傳送設備故$、光纖傳送路徑㈣、光纖傳 送路徑之損耗異常、及光纖傳送路徑之極化波異常中之何 者。又，判定部亦可於藉由監視部檢測出光傳送中之位元 ’曰吳率超過一定值之傳送異常時，判定被檢測到傳送異常 之傳延路徑單兀之異常原因為第】站台中之信號光傳送設 備故障、第2站以之信號光傳送設備㈣、光纖傳送路 k之扣耗異常、及光纖傳送路徑之極化波異常+之何者。 進而，本發明之光傳送監視裝置宜進而包含：對自分別 146466.doc 201126930 屬於一個或—個 俨轳a 之傳迗路徑早兀之第1站台所輪出之 ==中、^_合部而萃取之_部分信 =光功率計。於該構成中，判定部係根據藉由= =:傳送異常之狀況、藉由測定部所測定之後= 射先之強度之時間性變化眘 # ㈣μ定結果’ 心成為測定對象之傳送路徑單元之異常原因。 發明之效果 、乂據本發月之光傳送監視I置，當作為監視對象之—個 或個乂上之傳达路徑單元各者中發生傳送異 及早判定該傳送異常之原因。 此夠 【實施方式】 乂下邊參照圖i〜圖ls一邊詳細說明本發明之光 監視裳置之各實施形態。再者，於圖式之說明中，對同一 位、同-要素附上同—符號並省略重複說明。 (第1實施形態） 圖1係表示包含第1實施形態之光傳送監視裝置之光_ 系統之構成的圖。圖以斤示之光傳送系統 146466.doc 1 目同構造之叩以上之整數小2、...、f傳^路: 早几、該第1實施形態之光傳送監視裝置2A。再者，_ 時為2_左右之值4彳如，第⑽傳送路徑單元係如圖1所 示三包含第1站台lln、第2站台12n、及敷設於第丨站台η。 與第2站台12„之間之光纖傳送路徑13〇，經由光纖傳送路徑 13„而於帛1站台Un與第2站台％之間進行光傳送。本第1 實施形態之光傳送監視裝置2A對N個傳送路徑單元中之成 201126930 為監視對象之傳送路徑單元各個中的光傳送進行監視。 再者’於以下之關於各實施形態之說明中，當表示屬於 傳送路徑單元各個之同一構成要素時，參照編號之下 標使用「N」’當僅表示屬於特定之傳送路徑單元、例如第 η個傳送路徑單元之構成要素時，參照編號之下標使用 「1」。具體而言，「第1站台Un」、「第2站台12ν」、「光纖 傳达路徑13Ν」係表示屬於_傳送路徑單元各個之所有第 1站台、所有第2站台、所有光纖傳送路徑。 於關傳送路徑單元各者中，在光纖傳送路徑叫上且第 2站台12N#U或第2站台％之正前方）設置有滤光器〜。 =’，光纖傳送路㈣Ν上且帛i站台Un側設置有光合波 分波器15Ν。該光合波分波器15ν構成本第丨實施形態之光 傳送監視裝置2At之光耗合部之—部分，並且包含:經由 光纖傳送路徑13n而與第！站台Un光學性連接之第】連接璋 ’經由光纖傳送路徑13n而與第2站台i2n光學性連接之 第2連接埠15b，及用於將脈衝試驗光導人至t纖傳送路徑 13N之測定用埠15c。 一本第1實施形態之光傳送監視裝置2A將N個傳送路徑單 元之王部作為監視對象候補，於例如第η個傳送路徑單元 中榀測到傳送異常時，判定該第η個傳送路經單元之異常 原因。為此’該光傳送監視裝置2Α包含光開關2〇α、測定 裝置3〇及光傳送異常判定裝置5〇。光傳送異常判定裝置5〇 包3光傳廷監視部5 1、計測控制部52、光傳送路徑試驗部 53、試驗資料管理部54、配線資訊管理部55、⑼關配線 146466.doc 12· 201126930 部56㈣定部57。再者，光㈣繼與計測控制 邛52構成開關部。 光傳送監視部51構成監視部，其係根據第1站台Un各者 中之^號光之發送或接收之狀況而檢測N個傳送路和單元 各自中之傳送狀態。測定裝置30、計測控制部52及光傳送 路徑试驗部53構成測定部，其係將自關傳送路捏單元中 之作為光傳送監視部S1之監視對象之傳送路徑單元所獲得 的測疋資料，作為該等!^個傳送路徑單元各自之基準資料 ^己錄。該測定部例如於第n個傳送路徑單元成為監視對 象時，輸出應在屬於該第_傳送路徑單元之光纖傳送路 傳播之脈衝試驗光，另—方面，接收在該光纖傳 k仅13n中產生之後方散射光，藉此取得該後方散射光 之強度之時間性變化資料。再者’計測控制部似光開關 構成開關部，其係將自測定部輸出之脈衝試驗光麵合 ^^傳送路徑13n各個，另—方面，將光纖傳送路徑A 所產生之後方散射光_合到測。又，該開 關部及上述光合波分波器! 5 n構成光耦合部。 第1站台11N旨在偵測對應之光纖傳送路徑i3n上是否連 接有第2站台12n ’並將該偵測結果通知給光傳送監視部 又’第1站台Un對與第2站台12n之間之傳送異常(光 傳运成為中斷狀態、或者光傳送中之位元錯誤率超過一定 值m行制，並將㈣測結果通知給光傳送監視部^ 再者’料已連接於光纖傳送路徑13n之㈣台％而 各’右連接於光纖傳送路徑13n，則將該情況經由光纖傳 146466.doc •13· 201126930 站台 視對象 送路徑13n通知給第1站台…。光傳送監視部51自第,站台 nN之任一者接收如上述般之通知，藉此蜂定該通知之第】 一、例如第1站台⑽屬之第n個傳送路徑單元作為監 光開關20Α包含分別連接於光合波分波器^之第！輸入 輸出璋21G、及連接於測定裝㈣L人輸出埠220。 該光開關20A中之第！輸人輸出埠與第2輸人輸出埠之連接 係藉由計測控制部52而_，以將光合波分波器W之中 所選擇之任一者與測定裝置3〇彼此光學性連接。 測定裝置30輸出應在光纖傳送路徑A上傳播之脈衝試 驗光，另一方面，接收光纖傳送路徑13n中所產生之後方 散射光’#此取得後方散射光之強度之時間性變化資料。 測定裝置3〇較佳為利用OTDR(〇ptical Time〜咖匕 Reflectometry’光時域反射儀）之裝置。 自測定裝置30輸出之脈衝試驗光之波長係與在第i站台 11N與第2站台12>1之間發送接收之信號光之波長不同， 又，為能夠更早察覺到光纖傳送路徑13n上彎曲經時增大 之狀况，較佳為設為比信號光之波長為長、且更容易產生 由穹曲而引起之損耗增加之波長。例如，對於ITU-丁 G.625之單模光纖，彎曲半徑為15爪爪時，波長ι 3i 中 之彎曲損耗為2.33x10-2 dB/m左右，波長^55 μιι^之彎曲 損耗為1.45 dB/m左右，波長i_65 μπ^之彎曲損耗為477 dB/m左右。因此，即便於波長丨3丨卩爪中有比〇TDR之損乾 測疋精度0 _ 01 dB更小而無法偵測之彎曲損耗增加量，亦可 146466.doc -14· 201126930 藉由使用更長波長之脈衝試驗光，而以較佳感度檢測出光 、截傳送路徑13N之彎曲損耗。例如，於信號光波長為丨49The optical path between the first station and the terminal station that transmits the signal light is started after the branch path of the terminal A^, which is connected to the transmitted signal light, in the branch path of the 0-fork transmission path. 146466.doc 201126930 In the optical transmission monitoring device (the optical transmission monitoring device of the present invention) having the above-described structure, the determination unit detects that the transmission of the state is abnormal during the transmission of the light by the monitoring unit, and the determination is detected. The reason for the difference in the transmission path k unit is that the signal optical transmission equipment failure in the i-th station, the signal optical transmission equipment failure in the second station, the optical fiber transmission path disconnection, and the loss of the optical fiber transmission path are abnormal. What? determination. P can detect that the transmission error of the transmission path I unit in which the transmission abnormality is detected is the signal light transmission in the second station when the monitoring unit detects that the transmission error rate in the optical transmission 7 exceeds the fixed value transmission abnormality. Which of the equipment failure, the signal transmission equipment failure in the second station, and the abnormality of the optical fiber transmission path? Further, the measuring unit should output the wavelength ratio signal to the optical fiber transmission path of the transmission path unit to which the transmission abnormality is detected. The wavelength of light is a long pulse test. In this case, when the monitoring unit detects that the transmission of the interruption of the optical transmission is abnormal by the monitoring unit, it is determined that the abnormal cause of the transmission path in which the transmission abnormality is detected is that the signal light transmission device of the first station is malfunctioning, In the second station, the letter f, the optical transmission path (4), the loss of the optical fiber transmission path, and the polarization of the optical fiber transmission path are abnormal. Further, the determination unit may determine that the abnormal cause of the transmission path unit in which the transmission abnormality is detected is the first station when the monitoring unit detects that the transmission of the bit in the optical transmission exceeds a certain value. The signal transmission equipment failure, the signal transmission equipment (4) of the second station, the abnormal consumption of the optical transmission path k, and the polarization abnormality of the optical transmission path + whichever. Furthermore, the optical transmission monitoring apparatus of the present invention further includes: a ============================================================================================ And the extracted part of the letter = optical power meter. In this configuration, the determination unit transmits the abnormality by ==: and the measurement by the measurement unit = the temporal change of the intensity of the first shot. (4) The result is determined as the transmission path unit of the measurement target. Abnormal. EFFECTS OF THE INVENTION According to the light transmission monitoring I of the present month, a cause of transmission abnormality is determined in each of the transmission path units that are the target of monitoring or the transmission. [Embodiment] Each embodiment of the optical monitoring device of the present invention will be described in detail with reference to Figs. In the description of the drawings, the same reference numerals are attached to the same and the same elements, and the repeated description is omitted. (First Embodiment) Fig. 1 is a view showing a configuration of an optical system including an optical transmission monitoring device according to a first embodiment. In the light transmission system of the first embodiment, the optical transmission monitoring device 2A of the first embodiment is used. Further, _ is a value of about 2_. For example, the (10)th transmission path unit includes the first station 11n, the second station 12n, and the second station η as shown in FIG. The optical fiber transmission path 13A between the second station and the second station 12 is optically transmitted between the first station Un and the second station % via the optical fiber transmission path 13'. The optical transmission monitoring apparatus 2A of the first embodiment monitors the optical transmission in each of the N transmission path units 201126930 for the transmission path unit to be monitored. In the following description of the respective embodiments, when the same constituent elements belonging to the transmission path unit are indicated, the reference numeral "N" is used to indicate only the specific transmission path unit, for example, the η. When the components of the transmission path unit are used, "1" is used under the reference number. Specifically, "1st station Un", "2nd station 12v", and "optical fiber transmission path 13A" indicate all the first stations, all the second stations, and all the optical fiber transmission paths belonging to the _transmission path unit. In each of the transmission path units, a filter ~ is provided on the optical fiber transmission path and the front of the second station 12N#U or the second station. =', the optical fiber transmission path (4) is mounted on the Uni station Un side, and the optical multiplexer/demultiplexer 15 is provided. The optical multiplexer/demultiplexer 15v constitutes a portion of the light-receiving portion of the optical transmission monitoring device 2At of the second embodiment, and includes: via the optical fiber transmission path 13n! The second connection port 15b of the station Un optical connection is connected to the second station i2n via the optical fiber transmission path 13n, and the measurement for guiding the pulse test light to the t-fiber transmission path 13N. 15c. In the optical transmission monitoring device 2A of the first embodiment, the king portion of the N transmission path units is used as a monitoring target candidate, and when the transmission abnormality is detected in, for example, the nth transmission path unit, the nth transmission path is determined. The cause of the abnormality of the unit. Therefore, the optical transmission monitoring device 2 includes an optical switch 2A, a measuring device 3A, and a light transmission abnormality determining device 5A. The optical transmission abnormality determining device 5 includes the optical transmission monitoring unit 5, the measurement control unit 52, the optical transmission path test unit 53, the test data management unit 54, the wiring information management unit 55, and (9) the wiring 146466.doc 12·201126930 Part 56 (four) fixed part 57. Further, the light (4) and the measurement control unit 52 constitute a switch unit. The optical transmission monitoring unit 51 constitutes a monitoring unit that detects the transmission state of each of the N transmission paths and the units based on the transmission or reception of the light of the first station Un. The measurement device 30, the measurement control unit 52, and the optical transmission path test unit 53 constitute a measurement unit that is a measurement data obtained by the transmission path unit that is the target of the optical transmission monitoring unit S1 in the self-closing transmission unit. As the benchmark data of each of these transmission path units, it has been recorded. For example, when the nth transmission path unit is to be monitored, the measurement unit outputs pulse test light to be propagated on the optical fiber transmission path belonging to the first transmission path unit, and the reception is generated in the optical fiber transmission only 13n. The light is then scattered to obtain temporal changes in the intensity of the backscattered light. Further, the 'measurement control unit-like optical switch constitutes a switch unit that separates the pulse test optical surface transmission path 13n output from the measurement unit, and the other side, the light-scattered light generated by the optical fiber transmission path A To the test. Further, the switch unit and the optical multiplexer/demultiplexer 5 n constitute an optical coupling unit. The first station 11N is for detecting whether or not the second station 12n' is connected to the corresponding optical fiber transmission path i3n, and notifying the detection result to the optical transmission monitoring unit and between the first station Un and the second station 12n. The transmission is abnormal (the optical transmission becomes the interrupted state, or the bit error rate in the optical transmission exceeds a certain value m line system, and the (four) measurement result is notified to the optical transmission monitoring unit. ^ Further, the material is connected to the optical fiber transmission path 13n. (4) When the unit is connected to the optical fiber transmission path 13n, the case is notified to the first station via the optical fiber transmission 146466.doc •13·201126930. The optical transmission monitoring unit 51 is from the station. Any one of the nNs receives the notification as described above, thereby betting the first part of the notification. 1. For example, the nth transmission path unit belonging to the first station (10) is used as the optical switch 20, and is respectively connected to the optical multiplexer/demultiplexer. ^The first input/output port 21G and the measurement device (4) L human output port 220. The connection between the first input output port and the second input output port of the optical switch 20A is controlled by the measurement control unit 52. To split the optical multiplexer W Any one of the selections and the measuring device 3〇 are optically connected to each other. The measuring device 30 outputs pulse test light to be propagated on the optical fiber transmission path A, and on the other hand, the rear side scattered light generated in the receiving optical fiber transmission path 13n'# This obtains temporal change data of the intensity of the backscattered light. The measuring device 3 is preferably a device using an OTDR (〇ptical Time~Curry Reflectometry' optical time domain reflectometer.) The pulse test light output from the measuring device 30 The wavelength is different from the wavelength of the signal light transmitted and received between the i-th station 11N and the second station 12>1, and it is preferable to detect the increase in the bending time of the optical fiber transmission path 13n earlier. It is set to be longer than the wavelength of the signal light, and is more likely to cause a wavelength increase due to distortion. For example, for the ITU-D G.625 single-mode fiber, the bending radius is 15 claws, the wavelength ι The bending loss in 3i is about 2.33x10-2 dB/m, the bending loss at wavelength ?55 μm is about 1.45 dB/m, and the bending loss at wavelength i_65 μπ^ is about 477 dB/m. Therefore, even at wavelength 丨3 claws There is a reduction in the bending loss that is smaller than the TDR's loss-of-drying accuracy of 0 _ 01 dB and cannot be detected. It can also be used by using a longer-wavelength pulse test light, 146466.doc -14·201126930 The sensitivity detects the bending loss of the light and the intercepting path 13N. For example, the wavelength of the signal light is 丨49
Km之|f形時，較好的是脈衝試驗光之波長設為比該1 ·49 μιη長 1〇〇 nm以上之！ 65 _。 0又置於光纖傳送路徑丨3n上之光合波分波器1 5n將自測定 褒置30輸出之脈衝試驗光耦合到光纖傳送路徑，將光 纖傳送路徑13N中所產生之後方散射光耦合到測定裝置 3 〇。為此，光合波分波器} 5n如上述般，至少具有第}連接 埠15a、第2連接埠1 5b、及測定用埠1 5c。 设置於光纖傳送路徑1 3N上之濾光器！&使自測定裝置3〇 輪出之脈衝試驗光選擇性地反射，且使在第丨站台丨丨n與第 2站台12N之間發送接收之信號光選擇地透過。關於濾光器 14N中之脈衝試驗光之反射，較理想的是顯著高於光纖之 端面中之脈衝試驗光之反射’且，較理想的是實質性遮斷 朝向第2站台12N之脈衝試驗光之入射。 光傳送監視部51根據第1站台11N各個中之信號光之發送 或接收之狀況檢測傳送異常之有無。更具體而言，光傳送 監視部51於第1站台11N經由光纖傳送路徑i3n而與第2站台 12N連接且可無異常地進行光傳送時，自第1站台Un取得 第1站台11N及第2站台12Ng自之識別資訊、第1站台i 1n及 第2站台12N各自之發送接收功率規格資訊、以及第1站台 11N中之來自第2站台12N之實際之信號光接收功率而作為 第2站台連接信號’並將該第2站台連接信號發送給判定部 57 〇 146466.doc -15- 201126930 另一方面’光傳送監視部51於自第1站台11n中之例如屬 於第η個傳送路徑單元之第1站台Un接收到表示光傳送為 中斷狀態之意旨的通知時，與該通知一併自第丨站台丨、取 得光傳送為令斷狀態之第丨站台lln及第2站台12n各自之識 別資訊、第1站台lln之實際之信號光發送功率、以及來自 第1站台lln中之第2站台12„之實際之信號光接收功率而作 為光傳送中斷信號，並將該光傳送中斷信號發送給判定部 57 ° 又，光傳送監視部5 1於自屬於第n個傳送路徑單元之第i 站台1 ln接收到表示光傳送之位元錯誤率（以下稱作 「BER(Bit error rate)」）超過一定值之意旨的通知時，與 該通知一併自第】站台lln取得職異常之第】站台A及第2 站台仏各自之識別資m、第1站台比之實際之信號光發送 力率乂及來自第1站台11η中之第2站台％之實際之信號 光接收功率而作為光傳送顺異常信號，並將該光傳送 BER異常信號發送給判定部57。 計測控制部52根據來自㈣送路徑試驗部53之指示，對 光開關20A及測定裝置30各自進 進仃控制。藉由該計測控制 部52之控制，將來自測定裝置 衣置川之脈衝試驗光導入至屬於 第η個傳送路徑單元（監視對 豕X先纖傳送路徑13η，進 而，測定裝置30取得光纖傳送路 „ ^ ^ 峪乜13"内產生之後方散射 光之強度之時間性變化資料。 再者，試驗資料管理部 為監視對象之傳送路徑單 54針對Ν個傳 70各者，根據 送路徑單元中之成 測定裝置30所取得 146466.doc •16· 201126930 之後方散射光之強度之時間性變化資料，將該時間性變化 資料中之濾光器14N中之脈衝試驗光之反射位置及強度資 訊（測定資料）作為與第2站台12N各自相關之基準資料而加 以記憶並管理。又，0LT配線資訊管理部55針對第ι站台 πΝ與光纖傳送路徑13n之連接關係進行記憶並管理。光 SW配線資訊管理部56針對光開關繼之各埠與域傳送路 位13 N之連接關係進行記憶並管理。 光傳送路徑試驗部53自判定部57接收試驗指令。該試驗 指令包含第2站台連接信號（通知第丨站台_第2站台間之光傳 送之開始之信號）、光傳送中斷信號或光傳送B E R異常信號 (通知傳送異常之信號），又，包含第1站台11N及第2站台 %中之已通知有信號之第1站台lln及第2站台％(屬於2 為I視對象之第n個傳送路徑單元）各自之識別資訊。光傳 送路徑試驗部53若接收到該試驗指令，則根據藉由〇lt配 線資訊管理部55及光SW配線資訊管理部％各個所管理之 資訊，指示計測控制部52試驗開始。 再者，於例如確定第„個傳送路徑單元作為監視對象 時，計測控制部52控制光開關2〇A中之埠切換，以使脈衝 試驗光自測定裝置3〇導入至應試驗之光纖傳送路徑I%， 同時控制測定裝置30，以取得由所輸出之脈衝試驗光而引 起亚產生之後方散射光之強度之時間性變化資料。而且， 光傳送路徑試驗部53根據自計測控制部52所輸出之後方散 射光之強度之時間性變化資料，對濾光器A之脈衝試驗 光之反射之有無及位置進行解析。 146466.doc 201126930 :傳：路徑試驗部53於自判定部57接收到闕於成為監視 =之弟η㈣送路徑單元的第2站台連接信號時，將遽光 …之脈衝5式驗光之反射之位置及強度與第1站台11η及第 二台％相關聯地作為基準資料而記憶於試驗資料管理部 二方面’光傳送路徑試驗部53於自判定部57接收到關 或^監視對象之第η個傳送路徑單元的光傳送中斷信號 ^送MR異常信號時’取得記憶於試驗資料管理部54 中之基準資料’並檢m器14。之脈衝試驗光之反射是 否在基準資料之位置處。光傳送路徑試驗部53於遽光界 1:之脈衝試驗光之反射在基準資料之位置處之情形時， =自光、截傳送路徑13n之傳送開始時之傳送損耗之增加 置。而且’光傳送路徑試驗部53將該等之結果通知給判定 部5 7 〇 判定部57經由上述動作而自光傳送監視部”接收到第2 口連接U、光傳送中斷信號或光傳送BER異常信號。 判定部57於自光傳送監視部51接收到關於成為監視對象 第個傳送路徑單几之第2站台連接信號時，根據第！站 台llnt接收功率規格資訊與第1站台u„中之來自第2站台 貝IV、之七號光接收功率之差，求出光纖傳送路徑i ^傳适知耗界限’並將傳送損耗界限作為藉由光纖傳送路 立η而連接之第1站台Un及第2站台％之網路資訊加以記 又，判定部57將第1站台Un及第2站台12η各自之識別 貝訊通知給光傳送路經試驗㈣並下達關於光纖傳送路徑 146466.doc 201126930 13n之試驗指令。 另-方面，判定部57於自㈣送監視料接收到關於成 為I視對象之第η個傳送路徑單元之光傳送中斷信號或光 傳达BER異常信號時’根據第1站台11η及第2站台％各自 之識別資訊、第1站台11η之實際之信號光發送功率、第丄 站台lln中之來自第2站台l2n之實際之信號光接收功率、及 ^傳送路徑試驗部53之試驗之結果，進行是第丨站台η。還 疋第2站σ 12„之傳送设備之異f、或者是光纖傳送路徑α 之異常之故障原因之分析。 " =’作為一例，使用圖2~圖5說明接收到關於Ν個傳送 路位單兀中之成為監視對象之第11個傳送路徑單元的光傳 送中斷信號或光傳送BER異常信號時的判定部57之判定動 作。再者’圖2〜圖5分別係用於說明第i實施形態之光傳送 監=裝置2A所包含之狀部57之判定動作的流程圖。具體 而言，圖2係用於說明接收到光傳送中斷信號時之判定部 57之敎動作的流程圖。圖3係用於說明接收到光傳送 BER異常信號時之判定部57之判定動作的流程圖。圖4係 用於說明尤其於脈衝試驗光之波長比信號光之波長長⑽ X上之丨月开乂日卞接收到光傳送中斷信號時的判定部π之判 定動作的流程圖。x，圖5係用於說明尤其於脈衝試驗光 之波長比信號光之波長長i⑼nm以上之情形時接收到光傳 送BER異常信號時的判定部57之判定動作的流程圖。 接收到光傳送中斷信號時之判定部57之判定動作係如圖 2所示，首先於步驟川中，若帛i站台Un之傳送設備之實 ]46466.doc •19- 201126930 際之信號光發送功率未達發送規格’則判定為第1站台^ 之傳送設備發生故障。繼而於步驟S12中，若濾光器Γ 脈衝試驗光之反射不在特定位置上，則判定為光纖傳送路 徑13„發生斷線。繼而於步驟S13中，若自光纖傳送路徑 13 n之傳送開始時之整體傳送損耗之增加量為傳送損耗界 限以上，則判定光纖傳送路徑13n為損耗異常。而且，繼 而於步驟S14中，若第i站台lln中之來自第2站台之實際 之信號光接收功率為苐丨站台lln之接收規格内，則判定: 第1站台11„之傳送設備發生故障，若不在第i站台Un之接 收規格内，則判定為第2站台12n之傳送設備發生故障\ 接收到光傳送BER異常信號時之判定部57之判定動作係 如圖3所示，首先於步驟S23中，若自光纖傳送路徑Un之 傳送開始時之整體傳送損耗之增加量為傳送損耗界限1以 上，則判定光纖傳送路徑13n為損耗異常。而且，繼而於 步驟S24中，若第1站台lln中之來自第2站台12n之實際之信 號光接收功率為第丨站台lln之接收規格内，則判定第 台Un之傳送設備發生故障，若不在接收規格内，則判定 第2站台11之傳送設備發生故障。 再者來自第1站台1 1 n之傳送設備之發送功率係藉由於 傳送異常時由傳送設備測量發送功率而獲得。域傳送路 f 13 η之整體損耗之增加量係根據傳送開始時與傳送異常 時濾光器!4η中之反射之峰值之差而獲得。傳送損耗界限 可為於傳运開始時由第2站台％之傳送設備測量接收功率 並根據該值與該設備之接收規格之差而獲得之值，或者亦 146466.doc •20· 201126930 可為預先設定之值。又，來自第2站台12„之實際之信號光 接收功率可藉由於傳送異常時由第1站台Un之傳送設備測 量接收功率而獲得。 關於在脈衝試驗光之波長比信號光之波長長丨〇〇 nm以上 之情开> 時接收到光傳送中斷信號時的判定部5 7之判定動 作，如圖4所示，係與圖2之動作（步驟su〜S14)對應之動 作且執行包含步驟S13A代替步驟S13之動作（步驟S11、In the case of Km|f-shape, it is preferable that the wavelength of the pulse test light is set to be longer than the 1·49 μm by 1 〇〇 nm or more! 65 _. The optical multiplexer/demultiplexer 15 5, which is placed on the optical fiber transmission path 丨3n, couples the pulse test light output from the measurement device 30 to the optical fiber transmission path, and couples the backscattered light generated in the optical fiber transmission path 13N to the measurement. Device 3 〇. Therefore, the optical multiplexer/demultiplexer 5n has at least a first connection port 15a, a second port connection 15b, and a measurement port 15c as described above. Filter set on the fiber transmission path 1 3N! & The pulse test light that has been rotated from the measurement device 3 is selectively reflected, and the signal light transmitted and received between the second station and the second station 12N is selectively transmitted. Regarding the reflection of the pulse test light in the filter 14N, it is preferable to be significantly higher than the reflection of the pulse test light in the end face of the optical fiber', and it is preferable to substantially block the pulse test light toward the second station 12N. Incidence. The optical transmission monitoring unit 51 detects the presence or absence of a transmission abnormality based on the transmission or reception of the signal light in each of the first stations 11N. More specifically, when the first station 11N is connected to the second station 12N via the optical fiber transmission path i3n and the optical transmission can be performed without abnormality, the optical transmission monitoring unit 51 acquires the first station 11N and the second station from the first station Un. The station 12Ng transmits the received power specification information from the identification information, the first station i 1n and the second station 12N, and the actual signal light receiving power from the second station 12N in the first station 11N as the second station connection. The signal 'the second station connection signal is transmitted to the determination unit 57 〇 146466.doc -15-201126930. When the station station Un receives the notification indicating that the optical transmission is in the interrupted state, the identification information of the third station 12n and the second station 12n in which the optical transmission is in the cancel state is obtained from the third station together with the notification. The actual signal light transmission power of the first station 11n and the actual signal light reception power from the second station 12 of the first station 11n are used as optical transmission interruption signals, and the optical transmission interruption signal is transmitted to The fixed portion 57 °, the optical transmission monitoring unit 51 receives the bit error rate indicating the optical transmission (hereinafter referred to as "BER (Bit error rate)") at the i-th station 1 ln belonging to the nth transmission path unit. When the notification is over a certain value, the actual signal light transmission rate is the same as the identification value of the platform A and the second station of the station A and the second station. The actual signal light reception power from the second station % of the first station 11n is transmitted as an optical transmission abnormality signal, and the optical transmission BER abnormality signal is transmitted to the determination unit 57. The measurement control unit 52 controls the optical switch 20A and the measurement device 30 in accordance with an instruction from the (four) transmission path test unit 53. By the control of the measurement control unit 52, the pulse test light from the measurement device is introduced into the n-th transmission path unit (the monitoring pair X-fiber transmission path 13n, and the measurement device 30 acquires the optical fiber transmission path). „ ^ ^ 峪乜13" The time-varying data of the intensity of the scattered light is generated. In addition, the test data management unit is a transmission path for the monitoring target 54 for each of the 70 transmissions, according to the transmission path unit. The time-varying data of the intensity of the scattered light after 146466.doc •16·201126930 obtained by the measuring device 30, the reflection position and intensity information of the pulse test light in the filter 14N in the temporal change data (determination) The data is stored and managed as reference data related to each of the second stations 12N. The 0LT wiring information management unit 55 memorizes and manages the connection relationship between the first station πΝ and the optical fiber transmission path 13n. Optical SW wiring information management The unit 56 memorizes and manages the connection relationship between the optical switch and the domain transfer path 13 N. The optical transmission path test unit 53 judges itself. The unit 57 receives a test command including a second station connection signal (a signal notifying the start of the optical transmission between the second station and the second station), an optical transmission interruption signal, or an optical transmission BER abnormality signal (a signal for notifying the transmission abnormality) Further, the identification information of each of the first station 11N and the second station % that have been notified of the signal, the first station 11n and the second station % (the nth transmission path unit belonging to the I view object) are included. Upon receiving the test command, the optical transmission path test unit 53 instructs the measurement control unit 52 to start the test based on the information managed by each of the 配线lt wiring information management unit 55 and the optical SW wiring information management unit %. For example, when the „th transmission path unit is determined as the monitoring target, the measurement control unit 52 controls the 埠 switching in the optical switch 2〇A so that the pulse test light is introduced from the measuring device 3〇 to the optical fiber transmission path I% to be tested, and The measurement device 30 controls the temporal change data of the intensity of the scattered light after sub-generation by the pulse test light to be outputted. Further, the optical transmission path test unit 53 The time-varying data of the intensity of the scattered light after the measurement by the measurement control unit 52 analyzes the presence or absence of the reflection of the pulse test light of the filter A. 146466.doc 201126930: Pass: The path test unit 53 When the determination unit 57 receives the second station connection signal that is the η (four) transmission path unit of the monitoring = ,, the determination unit 57 correlates the position and intensity of the reflection of the pulse type 5 optometry of the ray light with the first station 11 η and the second station % In the case where the joint data is stored as the reference data in the test data management unit, the optical transmission path test unit 53 receives the optical transmission interruption signal of the nth transmission path unit of the target or the monitoring target from the determination unit 57, and sends the MR abnormality signal. At the time of 'receiving the reference data stored in the test data management unit 54' and checking the m device 14. Whether the reflection of the pulse test light is at the position of the reference data. When the optical transmission path test unit 53 reflects the pulse test light at the position of the reference data at the position of the reference light, the transmission loss at the start of the transmission from the optical and intercept transmission path 13n is increased. Further, the 'light transmission path test unit 53 notifies the determination unit of the result of the above, and the determination unit 57 receives the second port connection U, the optical transmission interruption signal, or the optical transmission BER abnormality from the optical transmission monitoring unit via the above operation. When the second station connection signal for the first transmission path to be monitored is received from the optical transmission monitoring unit 51, the determination unit 57 receives the power specification information from the first station llnt and the first station u„ The difference between the optical receiving powers of the second station and the seventh and the seventh, and the first station Un and the first station connected by the optical fiber transmission path η are obtained. The network information of the two stations is recorded, and the judging unit 57 notifies the optical transmission path of the first station Un and the second station 12n to the optical transmission path (4) and issues a test on the optical fiber transmission path 146466.doc 201126930 13n. instruction. On the other hand, when the (4) transmission monitoring material receives the optical transmission interruption signal or the optical transmission BER abnormality signal of the nth transmission path unit that is the I view, the determination unit 57 is based on the first station 11n and the second station. The respective identification information of %, the actual signal light transmission power of the first station 11n, the actual signal light receiving power from the second station l2n in the second station 11n, and the result of the test by the transmission path test unit 53 are performed. It is the third station η. Also, the analysis of the abnormality of the transmission device of the second station σ 12 „ or the abnormality of the optical fiber transmission path α. " = ' As an example, the reception of the transmission is described using FIG. 2 to FIG. The determination operation of the determination unit 57 when the optical transmission interruption signal or the optical transmission BER abnormality signal of the eleventh transmission path unit to be monitored is in the road position unit. Further, FIG. 2 to FIG. Fig. 2 is a flowchart for explaining the operation of the determination unit 57 when the optical transmission interruption signal is received, in particular, FIG. 2 is a flowchart for explaining the operation of the optical transmission control unit of the embodiment. Fig. 3 is a flowchart for explaining the determination operation of the determination unit 57 when the optical transmission BER abnormality signal is received. Fig. 4 is a diagram for explaining that, in particular, the wavelength of the pulse test light is longer than the wavelength of the signal light (10) X A flowchart of the determination operation of the determination unit π when the optical transmission interruption signal is received on the opening day of the month. FIG. 5 is a diagram for explaining reception when the wavelength of the pulse test light is longer than the wavelength of the signal light by i (9) nm or more. BER abnormality to optical transmission A flowchart of the determination operation of the determination unit 57 at the time of the signal. The determination operation of the determination unit 57 when the optical transmission interruption signal is received is as shown in Fig. 2, first in the middle of the step, if the transmission device of the station i is unclear] 46466.doc •19- 201126930 The signal transmission power of the signal is not up to the transmission specification', it is determined that the transmission device of the first station ^ has failed. Then in step S12, if the reflection of the filter 脉冲 pulse test light is not at a specific position In the above, it is determined that the optical fiber transmission path 13 is disconnected. Then, in step S13, if the amount of increase in the overall transmission loss from the start of the transmission of the optical fiber transmission path 13n is equal to or higher than the transmission loss limit, it is determined that the optical fiber transmission path 13n is a loss abnormality. Further, in step S14, if the actual signal light receiving power from the second station in the i-th station 11n is within the reception specification of the station station 11n, it is determined that the transmission device of the first station 11's has failed. If it is not within the reception specification of the i-th station Un, it is determined that the transmission device of the second station 12n has failed. The determination operation of the determination unit 57 when the optical transmission BER abnormality signal is received is as shown in FIG. 3, first in step S23. In the case where the increase in the total transmission loss from the start of the transmission of the optical fiber transmission path Un is the transmission loss limit of 1 or more, it is determined that the optical fiber transmission path 13n is a loss abnormality. Further, in step S24, if the first station 11n is in the middle station When the actual signal light receiving power from the second station 12n is within the reception specification of the second station 11n, it is determined that the transmission device of the second station has failed, and if it is not within the reception specification, it is determined that the transmission device of the second station 11 is generated. The transmission power of the transmission device from the first station 1 1 n is obtained by measuring the transmission power by the transmission device when the transmission is abnormal. The whole of the domain transmission path f 13 η The amount of increase in loss is obtained based on the difference between the peak of the reflection in the filter!4n at the start of transmission and the transmission abnormality. The transmission loss limit can be measured by the transmitting device of the second station at the start of the transmission and The value obtained according to the difference between the value and the receiving specification of the device, or 146466.doc •20·201126930 may be a preset value. In addition, the actual signal light receiving power from the second station 12 „ can be When the transmission is abnormal, it is obtained by measuring the received power by the transmission device of the first station Un. The determination operation of the determination unit 57 when the optical transmission interruption signal is received when the wavelength of the pulse test light is longer than the wavelength of the signal light by 丨〇〇 nm or more is as shown in FIG. The action (steps su to S14) corresponds to the action and performs the action including step S13A instead of step S13 (step S11,
12、13A、S14)，又，執行步驟si5〜S17。於步驟S13A 中，若光纖傳送路徑13n之整體傳送損耗自傳送開始時增 加，則進入步驟S15。於步驟S15中，若第1站台ιιη中之來 自第2站台12n之實際之信號光接收功率與光纖傳送路徑丨I 之整體傳送損耗（信號光波長換算值）之加算值未達第2站台 12η之發送規格’則判定為第2站台ι2η之傳送設備發生故 障。繼而於步驟S16中，若第1站台11η中之來自第2站台12η 之貫際之信號光接收功率為第丨站台丨ln之接收規格内，則 判定為第1站台1 ln之傳送設備發生故障。而且，繼而於步 驟S17中’若自光纖傳送路徑I%之傳送開始時之整體傳送 損耗之增加量（信號光波長換算值）為傳送損耗界限以上， 則判定光纖傳送路徑13η為損耗異常，若不為傳送損耗界 限以上’則判定光纖傳送路徑丨311為極化波異常。 關於尤其在脈衝試驗光之波長比信號光之波長長丨〇 〇 n m 以上之情形時接收到光傳送BER異常信號時的判定部57之 判疋動作，係圖5所示，執行相當於圖4之動作（步驟 S13A、S14)之動作（步驟S23A、S24)，又，執行步驟 146466.doc •21 · 201126930 S25〜S27。於步驟S23Af，若光纖傳送路徑^之整體傳送 損耗自傳送開始時增加，則進人步驟於步驟⑵中， 若第i站台Un中之來自第2站台12n之實際之信號光接收功 率與光纖料路㈣„之整體料損耗（㈣光波長換算值） 之加算值未達第2站台12n之發送規寺各，則判定為第2站台 12n之傳送設備發生故障。繼而於步驟s26中，若第^站台 1“中之來自第2站台12n之實際之信號光接收功率為第Μ 台11η之接收規格内，則判定為第i站台11η之傳送設備發生 故障。而且，繼而於步驟S27中，若自光纖傳送路徑i乂之 傳送開始¥之整體傳送損耗之增加量（信號光波長換算值） 為傳送損耗界m，則判定光纖料路徑i3n為損耗異 常，若不為傳送損耗界限以上，則判定光纖傳送路徑α 為極化波異常。 如上述般，本第丨本實施形態之光傳送監視裝置能夠 於發生光纖傳送路徑中之傳送異常（光傳送中斷或光傳送 BER異常）之情形時及早判定該異常原因。 (第2實施形態） 圖6係表示包含第2實施形態之光傳送監視裝置2b之光傳 送系統1B之構成的圖。該圖6所示之光傳送監視裝置π監 視光傳送系統1B中之光傳送。光傳送系統1B亦包含分別 具有相同構造之N(1以上之整數：1、2、…、η、）倘傳送 路裣單疋、及該第2實施形態之光傳送監視裝置2Β。例 如，第η個傳送路徑單元係如圖6所示，包含第】站台Un、 第2站台12η、及敷設於第i站台Un與第2站台12^之間之光 146466.doc -22· 201126930 :傳送路徑13n ’經由光纖傳送路徑I3n而於第1站台1“盘 ^站台％之間進行料送。本第2實㈣態之光傳μ :裝物亦對Ν個傳送路徑單元中之成為監視對象之傳送 :空早兀各自中的光傳送依序進行監視。 第1站α 11Ν與第2站台12ν係藉由敷設於第^站台^與第 2站σ 12N之間之光纖傳送路徑…發送接收信號光。 於N個傳达路徑單元各個中，在光纖傳送路徑^上且第 2站台12]"側（或第2站台％之正前方）設置有遽光器14N。 、在光義傳送路;^ 13n上且第！站台Un側設置有光合波 分波器16N。該光合波分波器16n構成本第2實施形態之光 傳送監視裳置2B中之光竊合部之一部分，並且包含：經由 光纖傳送路徑13N而與帛i站台Un光學性連接之第丨連接缚 16a，經由光纖傳送路徑13n而與第2站台16n光學性連接之 第2連接埠16b 1於將脈衝試驗光導人至光纖傳送路徑 13N之測定用埠16c，及用於萃取自第丨站台Un輪出之信號 光之一部分之確認用埠160。 本第2實施形態之光傳送監視裝置⑸將^^個傳送路徑單 元之全部作為監視對象候補，於例如第11個傳送路徑單元 中檢測到傳送異常時，在光纖傳送路徑13n上使脈衝試驗 光自第1站台1 Μ則朝向第2站台12„側傳播，並根據該脈衝 試驗光之傳播時所產生之後方散射光判定傳送異常之原 因。光傳送監視裝置2Β包含光開關20Β、測定衷置3〇、光 功率計40及光傳送異常判定裝置50。光傳送異常判定裝置 5〇包含光傳送監視部51、計測控制部52、光傳送路徑試驗12, 13A, S14), again, steps si5 to S17 are performed. In step S13A, if the overall transmission loss of the optical fiber transmission path 13n is increased from the start of transmission, the process proceeds to step S15. In step S15, if the actual signal light receiving power from the second station 12n in the first station ιιη and the total transmission loss (signal light wavelength conversion value) of the optical fiber transmission path 丨I are not added to the second station 12n In the transmission specification ', it is determined that the transmission device of the second station ι2η has failed. Then, in step S16, if the signal light receiving power from the second station 12n in the first station 11n is within the reception specification of the second station 丨ln, it is determined that the transmission device of the first station 1 ln has failed. . Then, in step S17, if the increase in the total transmission loss (signal light wavelength conversion value) at the start of the transmission from the optical fiber transmission path I% is equal to or higher than the transmission loss limit, it is determined that the optical fiber transmission path 13n is a loss abnormality. If it is not above the transmission loss limit, it is determined that the optical fiber transmission path 丨 311 is a polarization abnormality. In the case where the wavelength of the pulse test light is longer than the wavelength of the signal light by more than 丨〇〇 nm, the determination unit 57 performs the determination operation when the optical transmission BER abnormality signal is received, as shown in FIG. The operations (steps S23A, S14) (steps S23A, S24), and steps 146466.doc • 21 · 201126930 S25 to S27 are executed. In step S23Af, if the overall transmission loss of the optical fiber transmission path is increased from the start of transmission, the step of entering the step (2), if the actual signal light receiving power from the second station 12n in the i-th station Un is the optical fiber material If the added value of the total material loss ((4) optical wavelength conversion value) of the road (4) is less than the transmission schedule of the second station 12n, it is determined that the transmission device of the second station 12n has failed. Then in step s26, if When the actual signal light receiving power from the second station 12n in the station 1 is within the reception specification of the second station 11n, it is determined that the transmission device of the i-th station 11n has failed. Then, in step S27, if the increase in the total transmission loss (signal light wavelength conversion value) from the transmission start of the optical fiber transmission path i is the transmission loss boundary m, it is determined that the fiber material path i3n is a loss abnormality. If it is not above the transmission loss limit, it is determined that the optical fiber transmission path α is a polarization abnormality. As described above, the optical transmission monitoring apparatus according to the present embodiment can determine the cause of the abnormality early when a transmission abnormality (optical transmission interruption or optical transmission BER abnormality) in the optical fiber transmission path occurs. (Second Embodiment) Fig. 6 is a view showing a configuration of an optical transmission system 1B including the optical transmission monitoring device 2b of the second embodiment. The optical transmission monitoring device π shown in Fig. 6 monitors the optical transmission in the optical transmission system 1B. The optical transmission system 1B also includes N (one or more integers: 1, 2, ..., η) having the same configuration, and a light transmission monitoring device 2 according to the second embodiment. For example, as shown in FIG. 6, the nth transmission path unit includes the first station Un, the second station 12n, and the light laid between the i-th station Un and the second station 12^ 146466.doc -22· 201126930 The transmission path 13n' is transported between the first station 1 and the station 1 via the optical fiber transmission path I3n. The second (fourth) state of the optical transmission μ: the contents are also in the one of the transmission path units. The transmission of the monitoring target: the optical transmission in each of the early transmissions is sequentially monitored. The first station α 11Ν and the second station 12ν are laid by the optical fiber transmission path between the second station and the second station σ 12N... Transmitting and receiving signal light. In each of the N transmission path units, a chopper 14N is provided on the optical fiber transmission path and on the second station 12]" side (or directly in front of the second station %). The optical multiplexer/demultiplexer 16N is provided on the transmission path; and the optical multiplexer/demultiplexer 16n is formed on the second station side. The optical multiplexer/demultiplexer 16n constitutes one of the optical stealing portions in the optical transmission monitoring skirt 2B of the second embodiment. And including: a third connection 16a optically connected to the 帛i station Un via the optical fiber transmission path 13N The second port 16b1 optically connected to the second station 16n via the optical fiber transmission path 13n is used to measure the pulse test light to the measurement port 16c of the optical fiber transmission path 13N, and is used for extraction from the second station Un. In the optical transmission monitoring device (5) of the second embodiment, all of the transmission path units are used as monitoring target candidates, and when, for example, the transmission abnormality is detected in the eleventh transmission path unit, The pulse test light is transmitted from the first station 1 to the second station 12 side on the optical fiber transmission path 13n, and the cause of the transmission abnormality is determined based on the backscattered light generated when the pulse test light propagates. The optical transmission monitoring device 2A includes an optical switch 20A, a measurement device 3A, an optical power meter 40, and an optical transmission abnormality determining device 50. The optical transmission abnormality determining device 5 includes the optical transmission monitoring unit 51, the measurement control unit 52, and the optical transmission path test.
ι ° [ S 146466.doc •23- 201126930 部53、試驗資料管理部54、〇LT配線資訊管理部55、光SW 配線資訊管理部56及判定部57。 若與圖1所示之第1實施形態之光傳送監視裝置2 A之構成 進行比較’則該圖6所示之第2實施形態之光傳送監視裝置 2B在如下方面有所不同：代替光合波分波器15^圖丨）而包 含光合波分波器〗6n，且代替光開關2〇A而包含光開關 20B ’又’更包含光功率計40。 刀收态16n將自光開關20B到達之脈衝試驗光導入 至光’’截傳送路徑1 3N，將光纖傳送路徑丨％中所產生之後方 散射光輸出至光開關細，又，將自^站台Un經由光纖 傳送路徑…而到達之信號光輸出至光開關2GB。為此，光 。波刀波益16NW上述般，至少具有第丨連接埠、第2連 接埠16b、測定用埠16c、及確認用埠i6d。 光開關咖包含：與光合波分波器…之測定料心光 學性連接m輸出埠2ig，與測定裝置 :第2輪入輪出物〇,又，與光合波分波器 3 埠16d光學性連接 吻用 朵與抖、^ 輸輸料23G，及與光功率計40 ϋ連接之第4輸人輸出埠光開關細中之埠切換 係猎由計測控制部52控 旱刀換 m ^ ^右运擇先合波分波器16N中之 屬於第η個傳送路徑單元 ν中之 選擇之光合波 先。波刀波益％，則為將該所 第丨輸入輸出蜂；=與測定裝置啊 又’光開關_藉由計測控制 出:220連接。 光合波分波器l6n盥光功工制為將所選擇之 先力率#光學性連接，而將第3輪入 146466.doc -24· 201126930 輸出阜23〇中對應之埠與第4輸人輸出蜂no連接。藉由該 構成光功率叶40對第【站台Un經由光開關2〇B及光纖傳 送路徑13n所輸出之信號光之功率進行監控。 :光開關20B包含：與光合波分波器叫之測定用璋心光 子I·生連接之第i輸人輸出埠21G，與測定裝置Μ光學性連接 之第2輸入輸出埠22〇，又’與光合波分波器之確認用 阜6d光予J·生連接之第3輸入輸出蜂咖，及與光功率計4〇 光學性連接之第4輸入輸出埠MO。光開關應中之淳切換 係藉由計測控制部52控制’若選擇光合波分波器i6n中之 屬於第η個傳送路徑單元之光合波分波器％，則為將該所 =擇之光合波分波器16n與測定裝置㈣學性連接，而將 心輸入輸出埠210中對應之埠與第2輸入輸出璋22〇連接。 =，先開關20B藉由計測控制部”之控制，為將所選擇之 分波ϋ16η與光功率計4Q光學性連接，而將第3輸入 二，Π對應之埠與第4輸入輸出埠220連接。藉由該 士力率相對第1站台Un經由經光開關2GB而連接 之^傳祕㈣"所㈣之信號光之㈣騎監控。 再^’於確定^個傳送路#單元作為監視對象 二=Γ2根據來自光傳送路徑試驗部”之指示， 役剌先開關20Β、測定梦罟·π , 拄i 疋哀置30及光功率計40之各個。此 時，計測控制部52取得光功 號光功率之監控結果。4十4〇之第1站台W之輸出信ι ° [ S 146466.doc • 23- 201126930 Section 53, test data management unit 54, 〇LT wiring information management unit 55, optical SW wiring information management unit 56, and determination unit 57. The optical transmission monitoring device 2B of the second embodiment shown in Fig. 6 differs from the configuration of the optical transmission monitoring device 2A of the first embodiment shown in Fig. 1 in that: instead of the optical multiplexing wave The splitter 15) includes an optical multiplexer/demultiplexer 6n, and includes an optical switch 20B' and an optical power meter 40 instead of the optical switch 2A. The knife receiving state 16n introduces the pulse test light arriving from the optical switch 20B into the light intercepting transmission path 1 3N, and outputs the rear side scattered light generated in the optical fiber transmission path 丨% to the optical switch, and further, from the platform The signal light that arrives through the optical fiber transmission path... is output to the optical switch 2GB. For this, light. As described above, the wave cutter 16NW has at least a first connection port, a second connection port 16b, a measurement port 16c, and a confirmation port i6d. The optical switch coffee includes: the optical core of the optical multiplexer/wavelength splitter...the optical connection m output 埠2ig, and the measuring device: the second round of the wheel 〇, and the optical multiplexer/demultiplexer 3 埠16d optical Connect the kiss with the flower and shake, ^ 23G, and the 4th output of the optical power meter 40 ϋ connected to the switch, the switch is controlled by the measurement control unit 52 to control the dry knife for m ^ ^ right The selected photo-multiplexed wave belonging to the n-th transmission path unit ν in the first multiplexer/demultiplexer 16N is first. The wave cutter wave % is used to input and output the bee; and the measuring device ah and the 'optical switch _ are controlled by the measurement: 220 connection. The optical multiplexer demultiplexer l6n 盥 功 为 为 为 146 146 146 146 146 146466.doc -24· 201126930 output 阜23〇 corresponding to the fourth input Output ben no connection. The power of the signal light output by the [Station No. Un via the optical switch 2A and the optical fiber transmission path 13n] is monitored by the optical power unit 40. The optical switch 20B includes an ith input output 埠21G connected to the measuring photon splitter I and the optical input/demultiplexer, and a second input/output 埠22〇 optically connected to the measuring device, and The third input/output bee, which is connected to the optical multiplexer/demultiplexer, is connected to the J·sheng, and the fourth input/output 埠MO optically connected to the optical power meter 4〇. The switching of the optical switch is controlled by the measurement control unit 52. If the % of the optical multiplexer/demultiplexer belonging to the nth transmission path unit in the optical multiplexer/demultiplexer i6n is selected, the photosynthetic multiplexer is selected. The wavelength demultiplexer 16n is academically connected to the measuring device (4), and connects the corresponding 埠 of the cardiac input/output port 210 to the second input/output port 22〇. =, the first switch 20B is optically connected to the optical power meter 4Q by the control of the measurement control unit, and the third input 2, Π is connected to the fourth input/output port 220. By means of the signal rate of the signal transmission (4) of the (4) " (4) connected to the first station Un via the optical switch 2GB, the monitoring is performed. = Γ 2 According to the instruction from the optical transmission path test unit, the first switch 20 Β, the nightmare π, the 拄i 疋 疋 30 and the optical power meter 40 are measured. At this time, the measurement control unit 52 obtains the monitoring result of the optical power of the optical power. 4th 4th 第1st station W output letter
S 試驗部Μ自判定部57接㈣㈣ “個傳送路徑單元之試驗指令。該試驗指令包含第2 146466.doc •25· 201126930 站台連接信號、光傳送中斷信號或光傳送ber異常信號， 包含第!站台lln及第2站台12n各自之識別資訊。光傳 运路徑試驗部53自計測控制部52接收到光功率計扣之第工 出㈣光功率之監控結果’並將其發送給判 定部5 7。 於本第2實施形態中，即便於無法對成為監視對象之^ 個傳送路徑單S監控第！站台11η中輸出信號光功率之” 時，光功率計4〇亦可監控第1站台W所輸出之信號光之功 率。判定部57使用該監控、结果，與第1實施形態之情形同 樣地’於發生光纖傳送路徑中之傳送異常（光傳送中斷或 光傳送BER異常）時能夠及早判定其原因。 (第3實施形態） 圖7係表示包含第3實施形態之光傳送監視裝置2c之光傳 送系統1C之構成的圖。該圖7所示之光傳送監視裝置2〔監 視光傳送系統1C中之光傳送。光傳送系統⑴亦包含分= 具有相同構造之N(1以上之整數：卜2、、n、·）個傳送 路徑單元、及該第3實施形態之光傳送監視裝置2(：。其 中，光傳送系統1C為PON系統，各傳送路徑單元之信號2 傳播路徑具有多分支構造。例如，第η個傳送路徑單元如 圖7所示，包含第！站台11η、相當於第2站台12。之複數之終 端台12nJ、12n，2、12n，3...(以下’簡稱為第2站台"靡為2 以上之整數））、及敷設於第1站台lln與複數之 口1 么 之間之多分支光纖傳送路徑。再者’多分支光纖傳送路徑 具有分離器17n，且包含 敷设於第1站台lln與分離器17 146466.doc •26- 201126930 =間之光纖傳送路徑13n，分別敷設於分離器17n與複數之 第2站台n，m之間之複數之光纖傳送路徑（分支線路Mg 1、 18n，2、18n，3···。本第3實施形態之光傳送監視裝置％ 個傳送路徑單元中之成為監視對象之傳送 的光傳送依序進行監視。 + 第1站crllN與第2站台12NM係經由光纖傳送路徑、分 器17N及光纖傳送路徑i 8N m發送接收信號光。 本第3實施形態之光傳送監視裳置％具有與第㉟施形離 =送監視裝置2A相同之構成，如：將包含多分支光纖 =送路叙N個傳送路徑單元作為監視對㈣補，在例如 萄於成為監視對象之第n個傳送路徑單元之光纖傳送路和 η及光纖傳送路徑I上使脈衝試驗光自第丨站台 站台12nM側傳播，並根據該脈衝試驗光之傳播時 斤產生之後方散射光監視光傳送❶ . 仲本^實施形態令，對於成為監視對象之第η個傳送路徑 2 4連接於光纖傳送路經18心(經由分離器^連接於 光纖線路13„之Μ個光缠值、笨々〆 ； 徑）之㈣台8η，第m個光纖傳送路 送給幻站台lln。’第已連接之意旨之信號光發 站σ Un接收該信號光，並識別出g 站台I新連接於光纖傳送路㈣ 幻出弟2 光傳送監視部5 1。光傳送 ，、Λ月况通知給 定部57。 先傳运&視部51進而將該情況通知給判 光路“驗部53自判定部”接收到關於成為 S] ㈣㈣“元之第2站台I新連接於光== 146466.doc -27- 201126930 路k 1 8n,m之思曰的資Sfl，並根據藉由測定裝置3 〇所取得之 後方散射光之強度之時間性變化之資料，㈣濾光器广4 之脈衝試驗光之反射之有無及位置。此時，光傳送路徑: 驗部53參照記憶於試驗資料管理部Μ中之既設之關於第2 站台之濾光器的脈衝試驗光之反射之位置及強度，並根據 後方散射光之強度之時間性變化之資料’確認到達新的Χ第 2站台12n，m之路徑之存在。 而且 対％尤1寻延路徑試驗部53而言，若僅涉及第η低 傳送路徑單元，則於可確認到達新的第2站台ΐ2 —之路種 之存在之情形時，將與該新的第2站台η"對應之濾光= 14n，m之脈衝試驗光之反射之位置及強度與第i站台^、及第 2站台12n，m相關聯地作為基準資料而記憶於試驗資料1管理 部54中。又，於可確認到達新的第2站台12_之路徑二存 在時，開始第}站台lln與新的第2站台12^之間之傳送。 本第3實施形態亦與第丨實施形態之情形同樣地，判定部 57於發生光纖傳送路徑中之傳送異常（光傳送中斷或光傳 送BER異常）時能夠及早判定其原因。 進而，本第3實施形態中，若僅涉及第n個傳送路徑單 元，則於第2站台12m，m新連接於光纖傳送 士 1工i 0n，m日寸，可 進行與該第2站台12„，』應之濾m之安以認及性 能確認，且於該等確認之後可於第丨站台丨、與第2站a 12 n，m之間進行信號光之發送接收。 又，第3實施形態中，若僅涉及第〇個傳送路徑單元，貝| 亦可確認濾光器I4n，m之安裝位置，因而可調整濾光器μ則 I46466.doc •28- 201126930 之女裝位置，以能夠識別出藉由測定裝置30所取得之後方 散射光之強度之時間性變化之資料令各遽光器之反射之位 置。 (第4實施形態） '述第1第3貫她形滤之光耦合部中，計測控制部52 根據預先準備之記錄於〇LT配線資訊管理部55令之第丨站 台之配線資訊 '與記錄於光線資訊管理部对之光 開關配線資訊’進行光開關20A、2GB中之_切換。然 而，該計測控制部52中之埠切換之準確性係依存於預先準 備之配線資訊之準確性。即，分別記錄於⑽配線資訊管 理部55及光SW配、線資訊管理部56中之配線資訊，均係基 於施工資訊之人為登錄之資訊’從而有發生輸入錯誤及人 力延遲之可此性。因此，當預先登錄之配線資訊自身有誤 時’無法對ϋ由監視部所確定之傳送路徑單元進行所期望 ^試驗。又’只要OLT配線資訊管理部55及光請配線資訊 管理部56中未登錄配線資訊，亦無法進行試驗。 對此，本第4實施形態中，實現如下構造：即，於第 台與第2站台之間之光傳送開始之前，自動構築構成一個 傳送路徑單元之第i站台、光輕合部之測定用埠、及光纖 傳送路徑之對應關係。再者，圖8係表示第4實施形態之光 傳送監視裝置中之光柄合部周邊之構成的目。圖9係表示 包含第4實施形態之光傳送監視裝置2d之光傳送系統之構 成的圖。圖H)係用於說明圖9所示之光傳送系統⑴中之 OLT-光SW資訊管理部500之邏輯構造的圖。 146466.doc 29- 201126930 圖9所示之光傳送系統1D具備：信號光傳播路徑分別具 有多分支構造之N個傳送路徑單元、及第作施形態之光傳 送監視裝置2D。本第4實施形態中，光傳送系統m之各傳 送路徑單元係包含與圖7所示之光傳送系統⑴中之各傳送 路徑單元相同之多分支光纖傳送路徑而構成。再者，光傳 送系統m之N個傳送路徑單元之一部分或全部，亦可為與 圖1及圖6所示之各傳送路徑單元相同之構造。 本第4實施形態中，光搞合部（包含光合波分波器及開關 部）除開關部之構成外，其他與圖6所示之光耦合部之構成 相同。其t ’第4實施形態中之開關部除包含信號檢測器 300以代替圖6所示之開關部之光功率計4〇以外，其他亦與 圖6所不之開關部之構成相同。即，本第4實施形態之光耦 合部如圖8所示，包含分別配置於屬個傳送路徑單元之 光纖傳送路徑1 3N上之光合波分波器丨6n '及開關部。開關 部包含光開關20C、計測控制部52、及信號檢測器3〇〇。 進而，本第4實施形態中，圖9之光傳送異常判定裝置5〇 在如下方面與上述第1〜第3實施形態之光傳送監視裝置 2A〜2C不同：代替〇LT配線資訊管理部55及光SW配線資訊 管理部56而包含〇LT-光SW資訊管理部500。 如上述般，第4實施形態之光傳送監視裝置2D之構成除 上述光轉合部及光傳送異常判定裝置之構造外，與上述第 1〜第3實施形態之光傳送監視裝置2A〜2C之任一者相同， 從而省略重複之說明。 如圖8及圖9所示，光合波分波器16N將自光開關20C到達 146466.doc -30- 201126930 之脈衝試驗光導入至光纖傳送路徑13n，且將光纖傳送路 径13N中所產生之後方散射光輸出至光開關，又，將自 第1站台ilN經由光纖傳送路徑13n到達之信號光輸出至光 開關20C。為此’光合波分波器16n構成本第4實施形態之 光傳送監視裝置2D中之光耦合部之一部分，並且包含：經 由光纖傳送路徑13N與第！站台Un光學性連接之第i連接蜂 ，經由光纖傳送路徑13n與複數之第2站台16nm光學性 連接之第2連接埠16b，用於將脈衝試驗光導入至光纖傳送 路徑％之測定用埠16c，及用於萃取自第i站台A輸出之 信號光之一部分之確認用埠丨6d。 又’光開關2GC包含：與光合波分波器叫之測定用蜂 16a光予性連接之第丨輸入輸出埠21〇，與測定裝置川光學 性連接之第2輸入輸出埠22〇 ’又，與光合波分波器W之 確認用埠16d光學性連接之第3輸入輸出埠23〇，及與信號 檢測器3GG光學性連接之第4輸入輸出埠24Q。光開關中 之埠切換係藉由計測控制部52控制，若選擇光合波分波器 W中之屬於第n個傳送路徑單元之光合波分波器％，則 為將該所選擇之光合波分波器16n與測定裝置川光學性連 接’而將第1輸入輸出皡21〇中對應之谭與第2輸入輸出蜂 220連接。又，光開關20C藉由計測控制部52之控制，若為 將所選擇之光合波分波器16n與信號檢測器3〇〇光學性連 接’則將第3輸入輸出埠23〇中對應之埠與第4輸入輸出埠 220。藉由該構成，信號檢測器3〇〇可經由光開關20C及光 纖傳送路徑13„而進行第！站台lu所輸出之信號光之檢測。 146466.doc -31 _ 201126930 繼而，說明在第1站台11N與第2站台12nm之間之光傳送 之前，OLT-光SW資訊管理部500之自動構築動作。再者， 以下之說明令，設為在屬於第n個傳送路徑單元之第丨站台 11η與m個弟2站台12n，m之間開始光傳送。 百先，光傳送監視部51偵測第丨站台11η2新的傳送開始 信號，並向判定部57通知第i站台11η之識別編號。判定部 57收到該通知，且經由光傳送路徑試驗部兄、計測控制部 52而控制光開關20C及信號檢測器3〇〇。而且，計測控制部 52於光開關20C中，一邊切換第3輸入輸出埠23〇各個與第* 輸入輸出埠240之連接狀態，並確認信號檢測器3〇〇之檢測 結果，一邊搜查、檢測與已開始傳送之第丨站台對應之 第3輸入輸出埠23Ge其中，於該埠搜查中，已登錄於⑽- 光sw資訊管理部5附之璋編號之第3輪人輸出崞謂為搜 查對象之外。 若藉由計測控制部52’對已將新的傳送開始信號送出至 光傳送现視。P 5 1之第1站台U n之識別編號、與連接於該第 1站台11„之光開關20C中之第3輸入輪出埠23〇之痒編號的 對應關係進行檢測’則判定部57將該所檢測到之第【站台 之識別編號與第3輸人輸出埠23()之埠㈣之關係記錄於 〇LT-光SW資訊管理部5〇〇中並加以管理。再者，㈣光 請資訊管理部500之邏輯構造例如成為圖ι〇所示。又，光 開關2〇C中之第1輸人輸出埠叫連接有光合波分波器W 各個之敎料16e)、與光開關2QC之第3輸入輸出淳 23〇(連接有光合波分波器16n各個之確認用埠⑹)之關係， 146466.doc •32- 201126930 係以滿足特定之關係之方式，將光合波分波器16n各個之 測定用埠16c及確認用埠16d連接於光開關2〇c。該特定之 關係係指如下關係：例如連接有第光合波分波器1 6之 測定用埠16c之第i輸入輸出埠21〇之埠編號、與連接有 認用埠16d之第3輸入輸出埠23〇之埠編號藉由特定之計管 式而表示。因此，於藉由計測控制部52檢測出第3輸= 出痒230之埠編號之時間點，藉由使用有被檢測到之該淳 編號的計算式所獲得之璋編號成為^輸人輸㈣21(^對 應之埠編號，因而於01^_光8%資訊管理部5〇〇中，無需其 理第i輸入輸出蟑21〇與第3輸入輸出埠23〇之對應關係、。& 又，光傳送監視部51於自管理之外之第i站台（第i站二 η广第！站台uwp站台11η+ι〜第i站台ιΐΝ)之任一者: 送出傳送開始之信號之情形時，债測該新的第Μ台之新 ㈣f開始信號’並將該新的第1站台之識別編號通知給 判疋部5 7。收到通知之判定Α 卩57將邊偵測到之新的第1站 口作為新的傳送開始之第丨站台」，並新登錄到〇l S”訊管理部5。。卜而且，於找到光開 的第1站台對廊之笛^ 測一==r3°之時間點，作為「檢 送===藉由計測控制部52而檢測到與已 230之埠編號之時了之第1站台對應的第3輸入輸出埠 站么金#間點’將已送出該新的傳送開始信號之 Ϊ之二輸，物之對應之埠編 依序記錄到0LT-光^資訊管理部中（參照， 146466.doc • 33 · 201126930 圖10)。再者，於拆除第i站台N之中任—者之情形時判 定部57收到來自已偵測到第i站台之拆除之光傳送監視部 51之通知，並自記錄於〇LT_*sw資訊管理部5〇〇中之關係 資訊刪除與該拆除之第1站台相關之資訊。 信號檢測器300為如下裝置，即，監控經由光開關2〇c及 光纖傳送路徑13n而連接之第丨站台Un所送出之信號光，抽 出由該信號光所構成之傳送訊框内之該第丨站台丨I之識別 編號，並將該抽出之識別編號通知給計測控制部^。判定 部57對自光傳送監視部51通知之已送出新的傳送開始信號 之第1站台之識別編號、與信號檢測器3〇〇所抽出之識別編 號進行對照。結果，若光傳送監視部51所通知之識別編號 與信號檢測器300所抽出之識別編號一致，則判定部”判 斷光開關20C中之第3輸入輸出埠23〇之正確埠編號已「被 檢測到」。再者’作為信號檢測器綱，亦可使用具有既定 之〇NU(〇Ptical Netw〇rk Unh ’光網路單元）識別編號之 ONU。此時，利用光開關2〇c確立光學性連接路徑，藉此 第1站台與ONU間之通信鏈接確立，因此光傳送監視部51 確認自第1站台與具有規定之識別編號之〇NU之通信鏈接 狀態，從而能夠檢測出光開關20C中之第3輸入輸出埠23〇 之埠編號。於任一手段中’因能夠一邊識別已送出新的傳 送開始信號之第1站台，一邊檢測光開關2〇中之第3輸入輸 出埠230之對應之埠編號，故而即便於複數之第ι站台同時 送出新的傳送開始信號之狀況下，亦可正確檢測出光開關 20C中之第3輸入輸出埠23〇的、與該等複數之第台各個 146466.doc •34- 201126930 對應之埠編號M列如， 於一併桩、畜赍、& m〇LT執行時等時，即便對 ^併接通電源之複數之第〗站么， 編號(光開關20C中之時入二 出正確之璋 7之弟3輸入輸出埠23〇的 '與 站台各個對應之埠編號）。 第4實施形態之光傳送 *視裝置20令’如上述般在OLT-先s W貝gfL管理部500中登锌 Π⑬ ^錄有弟1站台與對應之埠編號(光 開關20C中之第3輸入輸出谭 . w 早之埠編唬）之對應關係的傳 达路徑早元可成為監視對象。 . m 象口此，例如，若將第η個傳 ㈣❹元中^站台11η與第3輸入輸出谭23〇之璋編號 之對應關係登錄於⑽.光sw#訊管理部_中，則該^ 個傳送路徑單元之監視動作係與上述第卜第3實施形態同 ，進行」而’引導自測定裝置3〇輸出之脈衝試驗光之 光開關20C中之第i輸入輪出埠21〇之蜂編號之綠定方法有 所不同。R ’當自第1站台1 h向光傳送監視部5 1送出信號 時，光傳送監視部51將第1站台⑴之識別編號通知給：定 部57。判定部57根據登錄於〇1^_光3〜資訊管理部5〇〇中之 對應關係而取得與該第！站台Un對應之第3輸人輸出痒23〇 之埠編號’根據該取得之琿編號，且依據光開關2〇c之構 造並藉由計算而求出第1輸入輸出埠210之對應之埠編號， 使自測定裝置30輸出之脈衝試驗光耦合到藉由計算所求出 之第1輸入輸出埠210之對應之埠編號。 根據該構成，光開關20C中之第i輸入輸出埠21〇分別連 接於光合波分波器16N之測定用埠i6c，第2輸入輸出埠22〇 連接於測定裝置30，第3輸入輸出埠23〇分別連接於光合波[ 146466.doc •35· 201126930 分波器16N之確認用埠’第4輸入輸出埠24〇連接於信號檢 測器300。因光開關2〇c中之第i及第3輸入輸出埠21〇、23〇 之對應為已知，故而若根據信號檢測器3 〇〇之檢測結杲確 疋已發送新的傳送開始信號之第1站台，則能夠自動構築 構成一個傳送路徑單元之第丨站台、光合波分波器之測定 用埠、及光纖傳送路徑之對應關係。因此，根據本第4實 靶形恕之光傳送監視裝置2D，不需要上述第丨〜第3實施形 惡中之OLT配線資訊管理部55及光SW配線資訊管理部 56(不需要該等管理部55、56之登錄作業及管理）。 又’依據記錄於OLT-光開關資訊管理部5〇〇中之資訊， 能夠簡單地找出因第丨站台之拆除等理由而導致目前無法 用於監視之第3輸入輸出埠230。藉此，能夠簡單且準確地 進行光開關20C中之埠再利用等埠之有效利用。 (弟5實施形態） 圖11係表不第5實施形態之光傳送監視裝置中之光耦合 部周邊之構成的圖。再者，本第5實施形態之光傳送監視 裝置之構成除光耦合部所包含之光開關2〇D外，實質上與 上述第4貫施形態之光傳送監視裝置2d(圖9)相同。 第5實施形態中之光開關2〇D如圖丨丨所示，埠切換機構與 第4實施形態中之光開關2〇c不同。第5實施形態中之光開 關20D中，第2輸入輸出埠22〇(連接於測定裝置3〇)、與第4 輸入輸出埠240(連接於信號檢測器300)，係於保持固定間 隔（圖11中為可配置3個埠之間隔）之狀態下，固定於可沿圖 中所不之箭頭A或B所示之方向移動之頭部250上。對應於 146466.doc -36- 201126930 °玄頭部250之構造，第1輸入輸出埠210與第3輸入輸出埠 230以每4個交替而配置。 根據本第5實施形態中之光開關細，若將第愤入輪出 ^240連接於第3輸人輸料2觀任—者，則連接於測定 .裝置30之第2輸入輸出埠22()自動地連接於對應之幻輪入 輸出埠21 〇。 再者，除上述光開關2〇D中之埠切換機構及動作外，在 針對N個傳送路徑單元之各個的監視動作之前所進行之 ⑽-光sw資訊管理部500之構築動作係與上述第4實施形 態相同。又，該構築動作以後之監視動作係與上述第工〜第 3實施形態之光傳送監視裝置2A〜2C相同。 (第6實施形態） 圖12係表示第6實施形態之光傳送監視裝置中之光耦合 部周邊之構成的圖。本第6實施形態中之光轉合部可適用 上述第1〜第5實施形態中之光開關2〇A〜2〇D之任一者。然 而本第6只轭形態中，係經由藉由計測控制部52而進行 切換控制之開關330(SW)，將信號檢測器3〇〇及光功率計4〇 連接於光開關20A〜20D中之第4輸入輸出埠24〇。 因此，若經由開關330連接第4輸入輸出埠24〇與信號檢 測器300，則本第6實施形態之光傳送監視裝置進行與上述 第4實施形態之光傳送監視裝置2D(圖9)相同之動作。另一 方面，若經由開關330連接第4輸入輸出埠240與光功率計 4〇,則本第6實施形態之光傳送監視裝置之構造除第4輸入 輸出埠240之連接對象外，與上述第4實施形態之光傳送監μ 146466.doc -37- 201126930 視裝置2D(圖9)相同。又，該監視動作係與上述第2實施形 態之光傳送監視裝置2Β(圖6)之監視動作相同。 (第7實施形態） 上述第1〜第ό實施形態之光傳送監視裝置中，若光合波 刀波盗經由第1及第2連接埠連接於第1站台及光纖傳送路 徑，則無法區分是否用於第台-第2站台間之光傳送（無 法區分目前使用/非目前使用）。為此，當將處於非目前使 用狀態之光合波分波器、以及連接於該光合波分波器之第 1站台側之光纖傳送路徑、及第2站台側之光纖傳送路徑拆 除、更換或者再利用時，若對錯誤設備實施該等之作業， 則成為發生光傳送中斷之事態。實際情況為，為避免此種 事態而無法簡單進行光纖之連接解除作業。 對此’本第7實施形態中，利用上述第4〜第6實施形態之 光傳送監視裝置（亦可利用上述第丨〜第3實施形態之光傳送 監視裝置），更包含如下構造：用於簡單找出處於非目前 使用狀態之光合波分波器，從而不會對目前使用狀態之光 傳迗造成影響，而可安心地實施該等非目前使用設備之拆 除、更換、再利用等作業。 例如’本第7實施形態之光傳送監視裝置之構造可與上 述第4實施形態之光傳送監視裝置相同，但判定部57之 周邊之構造不同。具體而言’如圖丨3之區域所示，判定 邛5 7係與第4實施形態同樣地’管理OLT-光SW資訊管理部 500，並且亦進而管理通信狀況管理部51〇。 本第7實施形態中，判定部57係與第4實施形態同樣地， 146466.doc 38- 201126930 對在第1站台與第2站台間之光傳送之開始之前自動構築之 資訊（登錄於OLT-光S W資訊管理部500中之資訊 ° ^ 與1由通 信狀況管理部51〇所管理之與第丨站台_第2站台間之通信狀 態相關之資訊（OLT-ONU通信狀態）進行對照，藉此檢測光 開關中之第3輸入輸出埠230中之哪一個埠為與並未用於第 1站台-第2站台間之光傳送中之非目前使用之光傳送路徑 對應的埠，並將該資訊登錄於通信狀況管理部51 〇中。再 者，通信狀況管理部510中如圖13之區域（b)所示，依序登 錄有檢測結果。再者，OLT-光SW資訊管理部5〇〇中登錄有 第1站台之識別時編號、與光開關中之第3輸入輸出埠23〇 之對應之埠編號之關係。 又，光開關係設置於光合波分波器（屬於N個傳送路徑單 元各個之光合波分波器）之附近，光開關之埠與光合波分 波器各個中之對應埠係利用5 m左右之丨條光纖軟線簡單連 接。藉此，若依據登錄於通信狀況管理部51〇中之光開關 之非目前使用埠資訊，目測追蹤光開關與光合波分波器間 之光纖軟線，則可簡單地找出非目前使用狀態之光合波分 波器、以及接於該光合波分波器之第1站台側之光纖傳送 路徑、及第2站台側之光纖光傳送路徑。再者，因光開關 與光合波分波器間之光纖軟線與第1站台_第2站台間之光 傳送無關，故而能夠在任意時間自光開關拔出（不會對光 傳送造成影響）。此時，亦可利用自光開關側照射心線對 照光等方法而找出目標光合波分波器。 如上述般’根據本第7實施形態之光傳送監視裝置，不 146466.doc 39- 201126930 會對目前使用狀態之光傳送造成影響，而可安心地實施該 等非目前使用設備之拆除、更換、再利用等作業。 【圖式簡單說明】 .圖1係表示包含第1實施形態之光傳送監視裝置之光傳送 系統之構成的圖； 圖2係用於說明第1實施形態之光傳送監視裝置所包含之 判定部之判定動作的流程圖（其1); 圖3係用於說明第1實施形態之光傳送監視裝置所包含之 判定部之判定動作的流程圖（其2); 圖4係用於說明第1實施形態之光傳送監視裝置所包含之 判定部之判定動作的流程圖（其3); 圖5係用於說明第丨實施形態之光傳送監視裝置所包含之 判定部之判定動作的流程圖（其4); 圖6係表示包含第2實施形態之光傳送監視裝置之光傳送 系統之構成的圖； 圖7係表示包含第3實施形態之光傳送監視裝置之光傳送 系統之構成的圖； 圖8係表示第4實施形態之光傳送監視裝置中之光耦合部 周邊之構成的圖； 圖9係表示包含第4實施形態之光傳送監視裝置之光傳送 系統之構成的圖； 圖10係用於說明圖9所示之光傳送系統中之〇1^_光;5力資 訊管理部之邏輯構造之圖； 、 圖11係表示第5實施形態之光傳送監視裝置中之光耦合 146466.doc -40- 201126930 部周邊之構成的圖； 圖12係表示第6實施形態之光傳送監視裝置中之光耦合 部周邊之構成的圖；及 圖！3(a)、（b)係表示第7實施形態之光傳送監視裝置中之 判定部周邊之構成的圖、及用於說明通信狀況營 味那之、段 輯構造之圖。 @ 【主要元件符號說明】 1A〜1D 光傳送系統 2A 〜2D 光傳送監視裝置 11 第1站台 12 第2站台 13 光纖傳送路徑 14 遽光器 15、16 光合波分波器 17 光束分光器 18 光纖傳送路徑（分」 20A 〜20D 光開關 30 測定裝置 40 光功率計 50 光傳送異常判定裝 51 光傳送監視部 52 計測控制部 53 ▲光傳送路徑試驗部 54 試驗資料管理邹 146466.doc -41 . 201126930 55 OLT配線資訊管理部 56 光SW配線資訊管理部 57 判定部 300 信號檢測器 500 OLT-光SW資訊管理部 510 通信狀況管理部 146466.doc * 42 -The S test unit is connected to the test unit 57. (4) (4) "Test command for one transmission path unit. The test command includes the second 146466.doc •25·201126930 station connection signal, optical transmission interruption signal or optical transmission ber abnormal signal, including the first! The identification information of each of the station 11n and the second station 12n. The optical transmission path test unit 53 receives the monitoring result of the optical power (4) optical power from the measurement control unit 52 and transmits it to the determination unit 57. In the second embodiment, the optical power meter 4 can monitor the first station W even when it is impossible to monitor the signal light power of the station station 11n in the transmission path unit S to be monitored. The power of the output signal light. Using the monitoring and the result, the determination unit 57 can determine the cause early when the transmission abnormality (optical transmission interruption or optical transmission BER abnormality) occurs in the optical fiber transmission path as in the case of the first embodiment. (Third Embodiment) Fig. 7 is a view showing a configuration of an optical transmission system 1C including the optical transmission monitoring device 2c of the third embodiment. The optical transmission monitoring device 2 shown in Fig. 7 [monitors the optical transmission in the optical transmission system 1C. The optical transmission system (1) also includes N (one or more integers: 2, n, ·) transmission path units having the same structure, and the optical transmission monitoring device 2 of the third embodiment (where: light The transmission system 1C is a PON system, and the signal 2 propagation path of each transmission path unit has a multi-branch structure. For example, the n-th transmission path unit includes the !th station 11n and the second station 12 as shown in FIG. The terminal stations 12nJ, 12n, 2, 12n, 3... (hereinafter referred to as "the second station" is an integer of 2 or more), and are disposed between the first station 11n and the plurality of ports 1 Multi-branch fiber transmission path. Further, the 'multi-branch optical fiber transmission path has a separator 17n, and includes a fiber transmission path 13n disposed between the first station 11n and the separator 17 146466.doc • 26-201126930, respectively, and is disposed on the separator 17n and the plural The optical fiber transmission path between the two stations n and m (the branch lines Mg1, 18n, 2, 18n, 3, ...). The optical transmission monitoring device of the third embodiment is monitored in the % transmission path units. The transmitted optical transmission is monitored in sequence. + The first station crllN and the second station 12NM transmit and receive signal light via the optical fiber transmission path, the distributor 17N, and the optical fiber transmission path i 8N m. The optical transmission monitoring of the third embodiment The skirting % has the same configuration as the 35th embodiment of the transmission monitoring device 2A. For example, the multi-branch optical fiber = the transmission path includes the N transmission path units as the monitoring pair (4), and is, for example, the target to be monitored. The optical fiber transmission path of the n transmission path units and the η and optical fiber transmission paths I propagate the pulse test light from the 12nM side of the second station, and according to the pulse test, the light is generated and the rear scattered light monitors the light. ❶ ^ 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 ^ 实施 实施 实施 实施 ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ ^ (4) Stage 8η, the mth fiber transmission path is sent to the magic station lln. 'The connected signal source σ Un receives the signal light and recognizes that the station I is newly connected to the fiber transmission path. (4) The illusion output 2 optical transmission monitoring unit 5 1. The optical transmission is transmitted to the given unit 57. The first transmission & viewing unit 51 further notifies the optical path "the inspection unit 53 from the determination unit" To become S] (4) (4) "The second station of the Yuan I is connected to the light == 146466.doc -27- 201126930 Road k 1 8n, m thinking of the capital Sfl, and after obtaining by the measuring device 3 〇 The data of the temporal change of the intensity of the square scattered light, (4) the presence or absence of the reflection of the pulse test light of the filter 4, and the optical transmission path: the inspection unit 53 refers to the existing memory in the test data management department. The position and intensity of the reflection of the pulse test light on the filter of the second station And confirming the existence of the path to the new Χ second station 12n,m based on the data of the temporal change of the intensity of the backscattered light. Moreover, the 対% 11 trailing path test unit 53 only refers to the η In the case of the low transmission path unit, when the presence of the new second station ΐ2 is confirmed, the filter corresponding to the new second station η" = 14n, m pulse test light reflection The position and intensity are stored in the test data 1 management unit 54 as reference materials in association with the i-th station and the second station 12n,m. Further, when it is confirmed that the second route to the new second station 12_ is present, the transfer between the first station 11n and the new second station 12 is started. Also in the third embodiment, as in the case of the third embodiment, the determination unit 57 can determine the cause early when a transmission abnormality (optical transmission interruption or optical transmission BER abnormality) occurs in the optical fiber transmission path. Further, in the third embodiment, when only the nth transmission path unit is involved, the second station 12m, m is newly connected to the optical fiber transmission line, and the second station 12 can be connected to the second station 12 „,』 The filter should be confirmed by the performance, and after the confirmation, the signal light can be transmitted and received between the second station and the second station a 12 n,m. In the embodiment, if only the first transmission path unit is involved, the mounting position of the filter I4n,m can also be confirmed, so that the position of the filter μ can be adjusted to the position of the women's clothing of I46466.doc •28-201126930 It is possible to recognize the position of the reflection of each of the choppers by the temporal change of the intensity of the scattered light obtained by the measuring device 30. (Fourth Embodiment) "The first third-dimensional filter is described. In the coupling unit, the measurement control unit 52 performs optical switches 20A and 2GB based on the wiring information 'recorded on the third station of the 〇 LT wiring information management unit 55 and the optical switch wiring information recorded in the light information management unit'. Switching between the measurement control unit 52 The accuracy depends on the accuracy of the pre-prepared wiring information. That is, the wiring information recorded in (10) the wiring information management unit 55 and the optical SW distribution and line information management unit 56 are all information based on the construction information. 'There is a possibility of input errors and manpower delays. Therefore, when the wiring information registered in advance is incorrect, it is impossible to perform the desired test on the transmission path unit determined by the monitoring unit. In the information management unit 55 and the optical distribution information management unit 56, the wiring information is not registered, and the test cannot be performed. In the fourth embodiment, the light is transmitted between the first station and the second station. Before the start of the transfer, the correspondence between the i-th station, the measurement unit for the light-light-sense unit, and the optical fiber transmission path of the one-way path unit is automatically constructed. Fig. 8 shows the optical transmission monitoring device of the fourth embodiment. FIG. 9 is a view showing a configuration of an optical transmission system including the optical transmission monitoring device 2d of the fourth embodiment. FIG. A diagram showing the logical structure of the OLT-light SW information management unit 500 in the optical transmission system (1) shown in Fig. 9. 146466.doc 29-201126930 The optical transmission system 1D shown in Fig. 9 has a plurality of signal light propagation paths respectively. N transmission path units of the branched structure and optical transmission monitoring apparatus 2D of the first embodiment. In the fourth embodiment, each of the transmission path units of the optical transmission system m is included in the optical transmission system (1) shown in FIG. Each of the transmission path units has the same multi-branch fiber transmission path. Further, part or all of the N transmission path units of the optical transmission system m may be the same as the transmission path units shown in FIGS. 1 and 6. Construction. In the fourth embodiment, the light engaging portion (including the optical multiplexer/demultiplexer and the switch portion) has the same configuration as that of the optical coupling portion shown in Fig. 6 except for the configuration of the switch portion. The switch unit in the fourth embodiment is the same as the switch unit shown in Fig. 6 except that the signal detector 300 is provided instead of the optical power meter 4 of the switch unit shown in Fig. 6 . In other words, as shown in Fig. 8, the optical coupling unit of the fourth embodiment includes the optical multiplexer/demultiplexer 丨6n' and the switch unit which are respectively disposed on the optical fiber transmission path 13N of one of the transmission path units. The switch unit includes an optical switch 20C, a measurement control unit 52, and a signal detector 3A. Further, in the fourth embodiment, the optical transmission abnormality determining apparatus 5 of FIG. 9 is different from the optical transmission monitoring apparatuses 2A to 2C of the first to third embodiments described above in place of the 〇LT wiring information management unit 55 and The optical SW wiring information management unit 56 includes a 〇LT-light SW information management unit 500. As described above, the configuration of the optical transmission monitoring device 2D of the fourth embodiment is different from the configuration of the optical transmission unit and the optical transmission abnormality determining device, and the optical transmission monitoring devices 2A to 2C of the first to third embodiments. Either the same is omitted, and the overlapping description is omitted. As shown in FIGS. 8 and 9, the optical multiplexer/demultiplexer 16N introduces the pulse test light from the optical switch 20C to 146466.doc -30-201126930 to the optical fiber transmission path 13n, and generates the rear side in the optical fiber transmission path 13N. The scattered light is output to the optical switch, and the signal light that has arrived from the first station ilN via the optical fiber transmission path 13n is output to the optical switch 20C. For this reason, the optical multiplexer/demultiplexer 16n constitutes one of the optical coupling units in the optical transmission monitoring device 2D of the fourth embodiment, and includes: via the optical fiber transmission path 13N and the first! The i-th connection bee that is optically connected to the station Un is connected to the second port 16b optically connected to the second station 16 nm via the optical fiber transmission path 13n, and is used to introduce the pulse test light into the measurement channel 16c of the optical fiber transmission path %. And a confirmation 埠丨6d for extracting a part of the signal light output from the i-th station A. Further, the optical switch 2GC includes a second input/output port 21〇 that is optically connected to the measuring bee 16a of the optical multiplexer/demultiplexer, and a second input/output 埠22〇' that is optically connected to the measuring device. The third input/output port 23A optically connected to the optical fiber splitter W for confirmation 埠16d and the fourth input/output 埠24Q optically connected to the signal detector 3GG. The switching in the optical switch is controlled by the measurement control unit 52. If the % of the optical multiplexer/demultiplexer belonging to the nth transmission path unit in the optical multiplexer/demultiplexer W is selected, the selected optical multiplexed wave is divided. The waver 16n is optically connected to the measuring device, and the tan corresponding to the first input/output port 21 is connected to the second input/output bee 220. Further, the optical switch 20C is controlled by the measurement control unit 52, and if the selected optical multiplexer/demultiplexer 16n is optically connected to the signal detector 3', the third input/output 埠23 对应 corresponds. And the fourth input/output 埠220. With this configuration, the signal detector 3 can detect the signal light output from the station platform lu via the optical switch 20C and the optical fiber transmission path 13 146466.doc -31 _ 201126930 Next, the description is made on the first station. The automatic construction operation of the OLT-light SW information management unit 500 before the transmission of the light between the 11N and the second station is 12 nm. Further, the following description is made to the second station 11n belonging to the nth transmission path unit. The optical transmission monitoring unit 51 detects a new transmission start signal of the second station 11n2, and notifies the determination unit 57 of the identification number of the i-th station 11n. When the notification is received, the optical switch 20C and the signal detector 3 are controlled via the optical transmission path test unit and the measurement control unit 52. Further, the measurement control unit 52 switches the third input/output in the optical switch 20C.埠23〇 each of the connection states with the *th input/output port 240, and confirming the detection result of the signal detector 3〇〇, while searching and detecting the third input/output port 23Ge corresponding to the third station that has started to transmit, The 埠In the investigation, the third round of human output that is registered in the (10)-light sw information management unit 5 is outside the search target. If the measurement control unit 52' has sent a new transmission start signal to Optical transmission is performed. The identification number of the first station U n of P 5 1 is detected in correspondence with the itching number of the third input wheel exit 23〇 of the optical switch 20C connected to the first station 11' Then, the determination unit 57 records the relationship between the detected [the station identification number and the third input output 埠 23 () (4) in the 〇 LT-light SW information management unit 5 并 and manages it. Further, (4) Light The information structure of the information management unit 500 is, for example, as shown in FIG. Further, the first input output of the optical switch 2〇C is connected to the data 16e) of the optical multiplexer/demultiplexer W, and the third input/output 淳23〇 of the optical switch 2QC (the optical multiplexed wave is connected) The relationship between the 16(6)) for each of the devices 16n is 146466.doc •32-201126930. The measurement 埠16c and the 埠16d for the optical multiplexer/demultiplexer 16n are connected to the optical switch in a manner to satisfy the specific relationship. 2〇c. This specific relationship refers to, for example, the number of the ith input/output port 21 of the measurement port 16c to which the optical multiplexing/demultiplexer 16 is connected, and the third input/output of the connection 认16d. The number of 23〇 is indicated by a specific gauge. Therefore, when the measurement control unit 52 detects the number of the third transmission = the number of the itching 230, the number obtained by using the calculation formula having the detected number of the flaw becomes the input and output (four) 21 (^ corresponds to the 埠 number, so in the 01^_light 8% information management unit 5〇〇, there is no need to deal with the correspondence between the i-th input/output 蟑21〇 and the third input/output 埠23〇. & The optical transmission monitoring unit 51 is one of the i-th stations (i-th station η 广 广! station uwp station 11n+ι to i-th station ιΐΝ) other than the management: when the signal of the transmission start is sent, the debt The new (four)f start signal of the new third stage is measured and the identification number of the new first station is notified to the judgment unit 57. The judgment of receiving the notification Α57 will detect the new first one. The station port is the new platform for the start of the transmission, and is newly logged in to the 管理l S" management department 5. Moreover, the first station on the light is found to the flute of the gallery ^ Measure 1 == r3 ° At the time point, as the "detection === the third input/output corresponding to the first station when the measurement control unit 52 detects the number after the number 230 has been detected Station Jinjin #间点' will have sent the new transmission start signal to the second of the transmission, and the corresponding corresponding code is recorded in the 0LT-light^ information management department (Ref., 146466.doc • 33 · 201126930 In the case of the removal of the i-th station N, the determination unit 57 receives the notification from the optical transmission monitoring unit 51 that has detected the removal of the i-th station, and records it from The relationship information in the LT_*sw information management unit 5 deletes information related to the removed first station. The signal detector 300 is a device that is connected via the optical switch 2〇c and the optical fiber transmission path 13n. The signal light sent by the second station Un extracts the identification number of the station station I in the transmission frame composed of the signal light, and notifies the measurement control unit of the extracted identification number. The identification number of the first station that has transmitted the new transmission start signal notified from the optical transmission monitoring unit 51 is compared with the identification number extracted by the signal detector 3A. As a result, the optical transmission monitoring unit 51 notifies Identification number and signal detector 3 When the identification numbers extracted by 00 match, the determination unit "determines that the correct number of the third input/output port 23 of the optical switch 20C has been "detected". Further, as the signal detector, it is also possible to use the predetermined number. The NU (〇Ptical Netw〇rk Unh 'Optical Network Unit) identifies the ONU of the number. At this time, the optical connection path is established by the optical switch 2〇c, whereby the communication link between the first station and the ONU is established, so The optical transmission monitoring unit 51 confirms the communication link state between the first station and the 〇NU having the predetermined identification number, and can detect the number of the third input/output 埠23〇 of the optical switch 20C. In any of the means, it is possible to detect the corresponding number of the third input/output port 230 of the optical switch 2A while recognizing the first station that has sent the new transmission start signal, and thus even the plural number of stations In the case where a new transmission start signal is simultaneously sent, the third input/output 埠23 of the optical switch 20C can be correctly detected, and the number M column corresponding to each of the plurality of 146466.doc •34-201126930 For example, when the pile, the animal, the & m〇LT are executed, etc., even if the number of stations of the power supply is turned on and the number is the same, the number is entered in the optical switch 20C. The younger brother 3 input and output 埠23〇's corresponding number to the station. The optical transmission* view device 20 of the fourth embodiment has the same number as the corresponding station number (the third of the optical switches 20C) in the OLT-first s W g gfL management unit 500 as described above. The communication path of the correspondence between the input and output TAN. w 早 埠 埠 早) can be monitored. m is like this, for example, if the correspondence between the number n of the nth (fourth) unit and the number of the third input/output tan 23 is registered in (10).lightsw# management unit_, then ^ The monitoring operation of the transmission path unit is performed in the same manner as in the above-described third embodiment, and the bee number of the i-th input wheel out of the optical switch 20C of the pulse test light output from the measurement device 3 is performed. The green method is different. When the signal is sent from the first station 1h to the optical transmission monitoring unit 51, the optical transmission monitoring unit 51 notifies the identification unit 57 of the identification number of the first station (1). The determination unit 57 acquires the corresponding relationship based on the correspondence relationship registered in the 〇1^_light 3 to the information management unit 5? The third input of the station Un corresponds to the itch number of the 输23〇', based on the obtained 珲 number, and the corresponding number of the first input/output 埠210 is obtained by calculation based on the structure of the optical switch 2〇c. The pulse test light output from the measuring device 30 is coupled to the corresponding 埠 number of the first input/output port 210 obtained by calculation. According to this configuration, the i-th input/output port 21〇 of the optical switch 20C is connected to the measurement 埠i6c of the optical multiplexer/demultiplexer 16N, and the second input/output port 22〇 is connected to the measurement device 30, and the third input/output port 23 is connected. 〇 is connected to the signal detector 300 by connecting the photosynthetic wave [146466.doc • 35· 201126930 demultiplexer 16N for confirmation] 4th input/output 埠24〇. Since the correspondence between the i-th and third input/output ports 21〇, 23〇 in the optical switch 2〇c is known, if a new transmission start signal is transmitted based on the detection result of the signal detector 3〇〇 In the first station, the correspondence between the second station constituting one transmission path unit, the measurement 光 of the optical multiplexer/demultiplexer, and the optical fiber transmission path can be automatically constructed. Therefore, according to the fourth optical target monitoring device 2D, the OLT wiring information management unit 55 and the optical SW wiring information management unit 56 in the above-described third to third embodiments are unnecessary (the management is not required). Registration and management of the departments 55 and 56). Further, based on the information recorded in the OLT-optical switch information management unit 5, it is possible to easily find the third input/output port 230 which is currently unavailable for monitoring due to reasons such as the removal of the second station. Thereby, it is possible to easily and accurately perform efficient use such as recycling in the optical switch 20C. (Embodiment 5) FIG. 11 is a view showing a configuration around the optical coupling unit in the optical transmission monitoring device according to the fifth embodiment. In addition, the optical transmission monitoring device of the fifth embodiment is substantially the same as the optical transmission monitoring device 2d (Fig. 9) of the fourth embodiment except for the optical switch 2D included in the optical coupling unit. As shown in Fig. 5, the optical switch 2'' in the fifth embodiment is different from the optical switch 2'c in the fourth embodiment. In the optical switch 20D of the fifth embodiment, the second input/output port 22〇 (connected to the measuring device 3A) and the fourth input/output port 240 (connected to the signal detector 300) are held at a fixed interval (Fig. In the state of 11 which is configurable with three turns, it is fixed to the head 250 which is movable in the direction indicated by the arrow A or B in the figure. Corresponding to the structure of the 146466.doc -36-201126930 ° head 250, the first input/output port 210 and the third input/output port 230 are alternately arranged every four. According to the fifth embodiment, the optical switch is thin, and if the first intrusion wheel 240 is connected to the third input conveyor 2, the second input/output port 22 of the measuring device 30 is connected ( ) Automatically connected to the corresponding magic wheel input and output 埠 21 〇. Further, in addition to the switching mechanism and the operation of the optical switch 2〇D, the construction operation of the (10)-light sw information management unit 500 performed before the monitoring operation for each of the N transmission path units is performed. 4 The embodiment is the same. Further, the monitoring operation after the construction operation is the same as that of the optical transmission monitoring devices 2A to 2C of the above-described third to third embodiments. (Embodiment 6) FIG. 12 is a view showing a configuration of a periphery of an optical coupling unit in an optical transmission monitoring device according to a sixth embodiment. In the light-converting unit of the sixth embodiment, any of the optical switches 2A to 2D in the first to fifth embodiments can be applied. However, in the sixth yoke configuration, the signal detector 3A and the optical power meter 4 are connected to the optical switches 20A to 20D via the switch 330 (SW) that performs switching control by the measurement control unit 52. The fourth input and output 埠24〇. Therefore, when the fourth input/output port 24A and the signal detector 300 are connected via the switch 330, the optical transmission monitoring device according to the sixth embodiment is the same as the optical transmission monitoring device 2D (FIG. 9) of the fourth embodiment. action. On the other hand, when the fourth input/output port 240 and the optical power meter 4 are connected via the switch 330, the structure of the optical transmission monitoring device according to the sixth embodiment is the same as the above-described connection of the fourth input/output port 240. 4 Embodiment of the light transmission monitoring μ 146466.doc -37- 201126930 The viewing device 2D (Figure 9) is the same. Further, this monitoring operation is the same as the monitoring operation of the optical transmission monitoring device 2 (Fig. 6) of the second embodiment. (Seventh Embodiment) In the optical transmission monitoring apparatus according to the first to third embodiments, if the optical multiplexer is connected to the first station and the optical fiber transmission path via the first and second ports, it is impossible to distinguish whether or not it is used. Light transmission between the first station and the second station (cannot distinguish between current use/non-current use). Therefore, when the optical multiplexer/demultiplexer which is not in the current state of use, the optical fiber transmission path connected to the first station side of the optical multiplexer/demultiplexer, and the optical fiber transmission path on the second station side are removed, replaced, or re At the time of use, if such an operation is performed on the erroneous device, a situation in which the optical transmission is interrupted occurs. In actuality, in order to avoid such a situation, it is not possible to simply perform the fiber connection cancellation operation. In the seventh embodiment, the optical transmission monitoring device according to the fourth to sixth embodiments (the optical transmission monitoring device according to the above-described third to third embodiments) may further include the following structure: Simply find out the optical multiplexer/demultiplexer that is not in the current state of use, so as not to affect the light transmission of the current state of use, and can safely implement the removal, replacement, and reuse of such non-current equipment. For example, the structure of the optical transmission monitoring device according to the seventh embodiment can be the same as that of the optical transmission monitoring device according to the fourth embodiment, but the configuration of the periphery of the determination unit 57 is different. Specifically, as shown in the area of Fig. 3, it is determined that the OLT-light SW information management unit 500 is managed in the same manner as in the fourth embodiment, and the communication status management unit 51 is further managed. In the seventh embodiment, the determination unit 57 similarly to the fourth embodiment, 146466.doc 38-201126930 automatically constructs information before the start of the optical transmission between the first station and the second station (registered in the OLT- The information in the optical SW information management unit 500 is compared with the information (the OLT-ONU communication state) related to the communication state between the second station and the second station managed by the communication status management unit 51. Which one of the third input/output ports 230 in the optical switch is detected is a 对应 corresponding to a non-currently used optical transmission path that is not used for optical transmission between the first station and the second station, and the information is The communication status management unit 51 is registered in the communication status management unit 51. Further, the communication status management unit 510 registers the detection results in sequence as shown in the area (b) of Fig. 13. Further, the OLT-light SW information management unit 5 The relationship between the identification number of the first station and the 埠 number corresponding to the third input/output 埠23〇 of the optical switch is registered in the middle. Further, the optical open relationship is set to the optical multiplexer (which belongs to the N transmission path units). Near the light multiplexer/demultiplexer) The corresponding 埠 of each of the 埠 埠 and the optical multiplexer/demultiplexer is simply connected by a fiber optic cord of about 5 m. Therefore, the information is not used according to the optical switch registered in the communication status management unit 51 By visually tracking the optical fiber cord between the optical switch and the optical multiplexer/demultiplexer, it is possible to simply find the optical multiplexer/demultiplexer that is not in the current state of use, and the optical fiber transmission on the first station side of the optical multiplexer/demultiplexer. The path and the optical fiber optical transmission path on the second station side. Moreover, since the optical fiber between the optical switch and the optical multiplexer/demultiplexer is independent of the optical transmission between the first station and the second station, it can be self-lighted at any time. The switch is pulled out (does not affect the light transmission). At this time, the target optical multiplexer/demultiplexer can be found by the method of illuminating the reference light from the light switch side, etc. As described above, according to the seventh embodiment. The light transmission monitoring device, 146466.doc 39- 201126930, will affect the light transmission in the current state of use, and can safely implement the removal, replacement, and reuse of such non-current equipment. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a configuration of an optical transmission system including an optical transmission monitoring device according to a first embodiment, and Fig. 2 is a diagram for explaining a determination operation of a determination unit included in the optical transmission monitoring device according to the first embodiment. FIG. 3 is a flowchart (No. 2) for explaining the determination operation of the determination unit included in the optical transmission monitoring device according to the first embodiment. FIG. 4 is a view for explaining the first embodiment. (3) of the determination operation of the determination unit included in the optical transmission monitoring device; FIG. 5 is a flowchart for explaining the determination operation of the determination unit included in the optical transmission monitoring device according to the second embodiment (4) FIG. 6 is a view showing a configuration of an optical transmission system including the optical transmission monitoring device according to the second embodiment; FIG. 7 is a view showing a configuration of an optical transmission system including the optical transmission monitoring device according to the third embodiment; FIG. 9 is a view showing a configuration of an optical transmission system including an optical transmission monitoring device according to a fourth embodiment; FIG. 10 is a view showing a configuration of an optical transmission system in the optical transmission monitoring device according to the fourth embodiment; Fig. 11 is a diagram showing the logical structure of the force information management unit in the optical transmission system shown in Fig. 9; Fig. 11 is a view showing the optical coupling in the optical transmission monitoring apparatus according to the fifth embodiment 146466.doc -40- FIG. 12 is a view showing the configuration of the periphery of the optical coupling unit in the optical transmission monitoring device according to the sixth embodiment; and FIG. 3(a) and (b) are diagrams showing the configuration of the periphery of the determination unit in the optical transmission monitoring apparatus according to the seventh embodiment, and a diagram showing the structure of the communication state. @ [Main component symbol description] 1A to 1D optical transmission system 2A to 2D optical transmission monitoring device 11 first station 12 second station 13 optical fiber transmission path 14 chopper 15, 16 optical multiplexer demultiplexer 17 beam splitter 18 fiber Transmission path (minutes) 20A to 20D Optical switch 30 Measurement device 40 Optical power meter 50 Optical transmission abnormality determination device 51 Optical transmission monitoring unit 52 Measurement control unit 53 ▲ Optical transmission path test unit 54 Test data management Zou 146466.doc -41 . 201126930 55 OLT wiring information management unit 56 Optical SW wiring information management unit 57 Judging unit 300 Signal detector 500 OLT-light SW information management unit 510 Communication status management unit 146466.doc * 42 -