Pass the Huawei HCIP Transmission H31-341_V2.5 Questions and answers with CertsForce

The OptiXtrans DC908 chassis supports both DC and AC power supply configurations, allowing it to operate as either a DC chassis or an AC chassis.

In Link Aggregation Group (LAG) settings, port priority determines which ports carry traffic preferentially. (A) If a primary port is configured to preferentially carry services, it must have a higher priority than other ports to ensure it is selected first. Port priority is numerically represented, and (D) a lower value of “port priority” means higher priority, which can be counterintuitive but is standard in networking. For manual aggregation groups that don’t run LACP, priority settings typically do not apply. This priority mechanism helps optimize link utilization and failover in aggregated links, as detailed in HCIP-Transmission documentation on Ethernet and service aggregation.

An LSP (Label Switched Path) in MPLS is unidirectional, meaning traffic flows in one direction only. A bidirectional LSP would require two separate LSPs in opposite directions. Each LSP has a tunnel ID and involves at least one ingress and one egress node. This design allows for traffic engineering and efficient routing in MPLS networks. HCIP-Transmission clarifies that bidirectional communication is achieved through paired unidirectional LSPs, not a single bidirectional LSP, which is a common misconception.

In an outloop (external loopback), the transmitted signal is sent out of the NE and then looped back into its receive port, so signals flow into the local WDM NE.

Hardware loopback on optical ports uses pigtail jumpers, and on electrical ports uses self-loop cables, both performed manually.

When performing optical hardware loopback, adding an optical attenuator is necessary to prevent excessive return power from damaging the transmitter.

Signal flow analysis is a diagnostic method used to check the service flow through a faulty WDM system node by node, aiding in fault localization. By analyzing the signal path stepwise, engineers can identify where faults or performance degradation occur within the network elements. HCIP-Transmission materials highlight this technique as vital for efficient troubleshooting in complex optical networks, enabling fast restoration and minimal service impact.

When using the loopback method for troubleshooting or testing, the objects to be looped back or replaced can include optical fibers, boards, fiber adapters, optical attenuators, or power supply devices. Loopback tests help isolate faults by looping signals back to the source or intermediate points, enabling precise fault location. HCIP-Transmission explains that loopback can be applied at various points within the transmission system to verify signal integrity and component function, making it a versatile diagnostic tool in optical networks.

Gain of an Optical Amplifier (OA) measures how much the signal power is increased, typically expressed in decibels (dB), which is a standard unit for power ratios in optical systems.

The TMB1AST2 board is a specialized optical module used in transmission equipment. According to HCIP-Transmission references, all the statements about this board are correct. (A) The TM1 optical port must be connected to the TMI1 optical port for proper operation. (B) It supports IEEE 1588v2 clock processing, essential for precise time synchronization, and includes OTDR (Optical Time Domain Reflectometer) functions for fiber fault detection and maintenance. (C) When working with DFIU03/DFIU04 boards, the OSC optical port requires an optical module that supports the 1511 nm wavelength to ensure wavelength compatibility. (D) Similarly, when working with DSFIU01/DSFIU02 boards, the TM1/RM1 and TM2/RM2 ports must use optical modules supporting 1511 nm and 1491 nm wavelengths respectively, ensuring correct wavelength assignment for WDM channels. This detailed configuration ensures interoperability and proper system functionality.

A common WDM service can be converted into an ODUk SNCP (Subnetwork Connection Protection) service. However, when an ODUk SNCP service is converted back into a common WDM service, the protection is interrupted, causing service disruption. This is because SNCP provides path-level protection with automatic switching, which is lost during conversion back to a simpler WDM configuration. HCIP-Transmission highlights this limitation in protection mechanisms when migrating between service types, important for network planning and service continuity management.

The TMK1UNS5 is a universal OTN line board that operates in 100 G and 200 G line modes and supports hybrid OTN/SDH/packet mapping (including ODU0, ODU1, ODU2/2e, ODU3, ODU4, and ODUflex) as well as FEC, OSC, and 1+1 protection. Its published “Functions and Features” do not include an electrical 3R regeneration mode, so it cannot be used as a regenerator.