Hello, everyone.
In this post, I would like to share with you how protection path switchover works in Huawei DWDM.
Abstract
Customer wants to know how does protection path works in Huawei's WDM
Answe
For the OSN 1800, the OLP board can implement optical line protection, intra-board 1+1 protection, inter-subrack optical channel protection, and client 1+1 protection
Ideally the 1 + 1 protection implementation diagram is as this
Handling Process
The OLP unit implements the dual-fed and selective receiving of one channel of signals.
1) Transmit direction
The TI optical port receives one channel of the optical signal. After passing through the splitter, the signals are output to the working and the protection through the TO1 and TO2 optical ports.
2) Receive direction
The signals in the working and the protection fibers are input through the RI1 and RI2 optical ports and enter the optical switch. The optical switch selects one from the two channels of signals based on the optical power of the signals. In this way, the selection of signals from the working and the protection channels is achieved. The selected optical signals are output through the RO optical port.
The optical power detecting module detects the detection signals that are extracted from the working and protection signals and reports the detection results to the control and communication module. The control and communication module compares the optical power of the two channels of optical signals and controls the operation of the optical switch based on the optical power. In this way, the selection of signals from the working and the protection channels is achieved
That's all, I hope you like it.
Thank you!
