Huawei H35-211_V2.5 Actual Questions

The MG reports availability and restarts to the MGC using H.248 ServiceChange with Method=Restart. The Reason code distinguishes the type of restart. In Huawei implementations aligned with H.248 semantics, Reason=[901] corresponds to a warm/warmboard restart scenario rather than a full cold start.

Board restart triggers a warm restart of the voice board/MG, producing ServiceChange { Method=Restart, Reason=901 }.

Reset coldstart performs a cold start, which would use a different reason code (cold start), not 901.

Reboot system generally implies a broader device reboot similar to cold start semantics, not 901.

ONT re-register affects ONU registration and does not cause the MG to announce a ServiceChange restart to the MGC.

According to IEEE 802.3av wavelength planning adopted by Huawei 10G-EPON, downstream uses 1577 nm and 10G upstream uses 1270 nm. In asymmetric coexistence, 1G-EPON upstream uses 1310 nm, but for 10G-EPON upstream specifically the wavelength is 1270 nm. Therefore the correct upstream wavelength for 10G-EPON is 1270 nm.

Huawei GPON implements hierarchical traffic control. CAR (Committed Access Rate) can be applied at multiple layers: GEM-port level (GEM-CAR), per-flow (Flow-CAR), and T-CONT level (T-CONT-CAR) for upstream bandwidth policing/shaping and guaranteeing QoS. GEM mapping is a classification/association mechanism (service → GEM/T-CONT) rather than a traffic-control action, so it is not a CAR measure.