Whether the logical fibers between the client-side ports of OLP and OTU boards need to be created on the NMS


When port protection or 1+1 protection is configured in single-site mode, it is not mandatory to configure logical fibers. This is because boards and ports are specified in single-site configuration and there is no need to search for boards or ports based on logical fibers.
Correct logical fibers created on the NMS provide references for configuration and check. Therefore, you are advised to correctly create logical fibers on the NMS.

Other related questions:
Number of client-side ports on the TTX board
There are 10 physical ports on the client side of the TTX board and the port with the maximum number is RX10/TX10. On the NMS, numbers 1 and 2 have been assigned to IN/OUT ports on line boards. Ports on tributary boards are numbered from 3. TTX is a tributary board and therefore its ports are numbered from 3. In other words, logical port 3 on the NMS corresponds to the RX1/TX1 port.

Fiber connection between ports when the client-side 1+1 protection is configured for a DCP board on 1600G devices
The TI1 and RO1 ports on the DCP board are interconnected with client-side devices. The TO11 and RI11 ports need to be connected to the client side of the active ELOG board, and the TO12 and RI12 ports need to be connected to the client side of the standby ELOG board.

Client-side transmission distance of a 100G OTU board
The client-side transmission distance of a board depends on the client-side optical module.

Method used to determine whether optical fiber connections are correct between a router and a WDM board on the client-side of WDM equipment
Disable the ALS function for the client-side laser of the WDM board and enable the laser to forcibly emit light. If the optical port on the router receives optical signals, the optical fiber in the transmit direction is correctly connected. Stop the router from emitting light. If the WDM board reports an R_LOS alarm, the optical fiber in the receive direction is correctly connected.

Whether the client-side optical port of the peer OTU board does not send or receive optical signals if the client-side optical port of the local OTU board does not with ALS enabled
According to the ALS principle, if the local OTU board does not receive any optical signal on its client side, the peer OTU board will not emit light on its client side.

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