A network operator is commissioning a new long-haul DWDM link using Huawei OptiXtrans E9600 series equipment. After enabling a 100G service, the optical power monitoring shows an unexpectedly high OSNR degradation at the receiver, despite the launch power and amplifier gains being within the planned design limits. The fiber link consists of multiple G.652 fiber spans. Which of the following is the most probable root cause that an experienced engineer should investigate first?
During the design phase of a metro WDM network, an engineer must select an appropriate protection scheme for a critical 10GbE service carried over an ODU2 container. The network topology is a ring, and the primary requirement is to achieve a switching time of less than 50 ms while optimizing wavelength resources. Which protection scheme should be implemented at the electrical layer to meet these requirements?
A technician is configuring a new service on a Huawei OptiXtrans E6608T. The task is to map a 1GbE client signal into an OTN container for transport. According to the ITU-T G.709 standard and Huawei's implementation, which mapping path is correct for this service?
True or False: In a Huawei WDM system, the Tandem Connection Monitoring (TCM) feature can only be configured and monitored at the path-terminating equipment (PTE) and not at intermediate regeneration sites.
A field engineer is performing the initial commissioning of a point-to-point WDM link. Which of the following tasks are considered part of the optical layer commissioning phase, to be completed before any client services are provisioned? (Select THREE)
A major telecommunications provider is deploying a new backbone network using the Huawei OptiXtrans E9624 platform. The network must support a mix of 100G and future 400G services with high reliability. The network design involves complex mesh topologies. Which board is essential for enabling flexible, multi-degree wavelength grooming and reconfigurable add/drop capabilities at the core nodes?
An administrator is analyzing a persistent `R_LOS` (Receive Loss of Signal) alarm on a WDM system's OSC (Optical Supervisory Channel) board. The main service wavelengths are operating correctly. What is the most likely cause of this specific alarm?
Which statement accurately describes the primary difference in application focus between the Huawei OptiXtrans E9600 series and the OptiXtrans DC908?
**Case Study** A regional internet service provider (ISP) is upgrading its network to offer dedicated, high-bandwidth services to enterprise customers. They have deployed a ring network using Huawei OptiXtrans E6616 equipment. A key customer requires a protected 40 Gbit/s service between two of their sites, Site A and Site C, on the ring that also includes Site B and Site D in a square topology (A-B-C-D-A). The ISP's network architect has decided to use ODU3 containers to carry the 40GE service. To ensure high availability, they have configured ODUk SNCP. After configuration, the service is tested and works correctly. However, during a scheduled maintenance window, a technician performs a test by simulating a fiber cut between Site A and Site B. The monitoring system shows that the service correctly switches to the protection path (A->D->C). When the fiber cut is repaired, the service does not automatically switch back to the primary working path (A->B->C). What is the most likely configuration parameter that needs to be adjusted on the ODUk SNCP group to ensure the service returns to the primary path after a fault is cleared?
Stimulated Raman Scattering (SRS) is a non-linear effect in optical fibers that can impact WDM system performance. Which of the following statements accurately describes the effect of SRS?