Networking Cable Splitter
FAS Series Optical Instrument applications of automatic protection-FAS, optical automatic protection by jekky
Chapter Overview automatic optical switch apparatus 1.1 Overview FAS series of optical automatic protection instrument is a fiber-optic communications make decisions, prepare light optical switching devices, can automatically identify the primary, backup system and optical signal state, for the instantaneous optical switching, which can avoid the main Full stop using fiber optic cable barriers, the protection system operating normally. Using optical automatic protection apparatus can simply and economically to create various paths, the main trunk of the backup system and the needs of the various optical switching network 1.2 meter optical principle of automatic protection Usual line protection with 1 +1 protection and protection of both 1:1 mode, the line loss is large redundancy 1 +1 protection methods recommended in the amount of line loss is small, the proposed redundancy 1:1 protection methods. 1.2 1:1 +1 protection mode 1 +1 protection mode: In the transmitter using optical splitter (Splitter) to separate light signals, usually in a 50:50 optical splitter (in practice because of work and the protection of optical fiber routing inconsistencies can use different splitting ratio of optical splitter), respectively, after the separation of optical signals in fiber optic and backup fiber optic transmission work. Fiber at the receiving end of optical channels selected by closing the device on standby optical fiber and the work of the election close. When the working fiber failure when the receiving side automatically selects the channel received from the backup in Figure 1.1 1.2.2: 1:1 protection mode 1:1 protection mode: select channels in the transmitter light collection device for sending optical channel routing, Along the working channel optical signals can only be transmitted or back-channel (1 +1 is the same along the two Paths Delivery). Receiving end the same channel in the light collection device on the work of selected channel and alternate channel selection, it must ensure access and delivery channels to accept consistent failure when the working channel when the sending end and receiving end at the same time to switch to the backup channel. Figure 1.2 1.2.3 Network Construction A: Long primary / standby optical switch automatically Long standby cable relay station from 50 to 100 km, based on light sensitivity of the receiver end system requirements, to guarantee the normal operation of the communication line, end offices using alternate between A and B fiber-optic cable in the end Bureau of A and B automatically switch between the introduction of fiber-optic line protection system, communications guarantee system indicators and normal. Figure 1.3. B: cross-section relay, long the primary / standby optical switch automatically End offices between the A and B have more than one relay station, across large, multiple section need to be protected. A and B at the end of the main Board with the introduction of optical fiber cable protection, use of end office A and B alternate between the optical fiber, optical amplifier settings, the establishment of end offices across relay station A to B, long-distance optical fiber line automatic switching protection system, switch range, application efficiency, more complete and reliable. Figure 1.4 C: automatic protection switching communication business board Exchange equipment in order to prevent the failure of the communication board, usually the work of another protective plate plate heat back up, causing failure when the work sheet work sheet is not the time to send light, working light channel automatically switches to protection board. Send and receive the same channel at the same time switch to ensure consistent signal. Figure 1.5
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