![]() For details about the configuration guide and precautions, see the Alarm and Event Handling.For details, see the Hardware Description. Only some WSS boards support the optical-layer loopback function.The ADC0824 board is used as an example to describe manual optical-layer loopback via physical fiber connection. Therefore, instead of performing fiber loopback on the DM and AM physical ports of the boards, you can directly configure software loopback on the NMS to avoid onsite operations. The WSS modules of some boards have internal optical ports for loopback. The DWSS20 board is used as an example to describe manual optical-layer loopback via physical fiber connection. The alarm is cleared only after all loopback configurations are deleted. After a loopback is configured, a LOOP_ALM alarm is generated on the IN port. The loopback path on the WSS board is as follows: IN->DM->AM->OUT. By checking the service transmission and receiving on the OTU board, you can determine whether the optical line between the OTU and WSS boards is normal. To implement the optical-layer loopback on the WSS board, you need to perform a fiber loopback on the DM and AM physical ports, and configure the logical fiber connection and loopback function between the DM and AM ports on the NMS. Mode 2: Configure a software loopback on the NMS without any manual fiber loopback operation. Mode 1: Manually create physical fiber connections, loop back the DM and AM ports of the WSS board using optical fibers, and configure logical fiber connections and loopback from the DM port to the AM port on the NMS. Specifically, services are transmitted and received through the same WSS board, and a loopback is performed at the DM/AM layer or internal port layer of the WSS board.Ĭurrently, optical-layer loopback can be implemented in two modes. ![]() By creating a loop of signal from transmitter to receiver within one MPO piug,it forms optical link which allows testing of optical network segment by segment. Range ≤ 0.Optical-layer loopback is performed to locate faults. L-com’s 62.5/125 Multimode fiber loop back cables provide an economical solution for a number of fiber optic test applications. MPO Loopback Connector is designde for testing of MPO parallel links and for device burn-in.
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