Pass the Huawei HCIP-Access H35-210_V2.5 Questions and answers with ValidTests

XGS-PON Wavelengths :

XGS-PON (10-Gigabit Symmetric Passive Optical Network) uses specific wavelengths for upstream and downstream transmission:

Downstream (OLT to ONU) : 1577 nm.

Upstream (ONU to OLT) : 1270 nm.

Why 1577 nm?

The ITU-T G.9807.1 standard specifies 1577 nm as the downstream wavelength for XGS-PON. This wavelength is chosen to avoid interference with GPON, which uses 1490 nm for downstream transmission.

Other Options :

1490 nm : Used for downstream transmission in GPON, not XGS-PON.

1310 nm : Used for upstream transmission in GPON, not XGS-PON.

1290 nm : Not a standard wavelength in PON technologies.

Thus, the correct answer is C .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: XGS-PON Wavelengths.

ITU-T G.9807.1 Standards for XGS-PON .

Vectoring Classification :

Vectoring is primarily classified into two types based on the scope of crosstalk cancellation:

System-Level Vectoring (SLV) : Applies to all lines within a single DSLAM or cabinet.

Node-Level Vectoring (NLV) : Applies to lines across multiple DSLAMs or nodes.

However, these are not the only classifications. Other implementations, such as hybrid approaches, may also exist depending on the network design.

Why FALSE?

The statement incorrectly claims that vectoring is classified only as SLV and NLV, ignoring other possible implementations or variations.

Thus, the correct answer is B .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: VDSL2 Vectoring Architectures.

ITU-T G.993.5 Standards for Vectoring in VDSL2 .

OIDs (Object Identifiers) are numeric (e.g., 1.3.6.1.2.1.1.5), not letters. The statement in C is incorrect.

ONU Activation Overview :

When an ONU (Optical Network Unit) is added to the OLT, it may initially be in a deactivated state (Control flag = deactive).

To bring the ONU online, it must be explicitly activated using the ont activate command.

Command Usage :

The ont activate command is issued in GPON port mode to activate the ONU. Once activated, the ONU transitions to the Online state and begins normal operation.

Why TRUE?

The statement accurately describes the procedure for activating an ONU when the control flag is deactive.

Thus, the correct answer is A .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: ONU Activation.

OLT Command Reference Guide by Huawei.

Adding an ONT to the OLT :

Adding an ONT (Optical Network Terminal) to the OLT involves several steps, but the critical step is registering the ONT and binding it to the appropriate profile.

Key Steps :

DBA Profile : Configures dynamic bandwidth allocation for the ONT but is not mandatory during initial registration.

ONT Service Profile : Defines services (e.g., Internet, IPTV) but is applied after the ONT is added.

Add ONT and Bind Profile : Registers the ONT with the OLT and binds it to a pre-configured line profile. This is the essential step for adding an ONT.

ONT Line Profile : Configures the VLAN and service parameters but is created before adding the ONT.

Why C?

The most critical action when adding an ONT is to register it and bind it to a profile, ensuring it is recognized and operational within the network.

Thus, the correct answer is C .

References:

HCIA Huawei ACCESS Official Documentation , Chapter: ONT Registration.

OLT Command Reference Guide by Huawei.