* ONT Line Profile Overview :
* An ONT line profile defines the mapping and configuration of services for an ONU (Optical Network Unit) on the OLT.
* Key Parameters :
* Mapping between GEM ports and data packets : Specifies how data packets are mapped to GEM (GPON Encapsulation Method) ports for transmission.
* GEM ports : Logical ports used to encapsulate and transmit data over the GPON network.
* T-CONT (Transmission Containers) : Allocates upstream bandwidth for different service flows.
* Number of Ethernet ports on the ONT : This is a hardware attribute of the ONT and is not defined in the line profile.
* Why A, B, C?
* These parameters are directly related to the configuration of services and are included in the ONT line profile.
* The number of Ethernet ports is unrelated to the line profile and is determined by the ONT hardware.
Thus, the correct answers are A, B, C .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: ONT Line Profiles.
* GPON Service Configuration Guide by Huawei.

* Testing Optical Transmit Power :
* Testing the optical transmit power of an ONU involves measuring the power output at its upstream port.
* Key Considerations :
* Wavelength : The upstream wavelength for GPON/XGS-PON is 1310 nm , so selecting this wavelength is correct.
* Power Meter Type : A common power meter is not suitable for testing optical power in live networks. Instead, a specialized optical power meter or an OLT-based monitoring tool should be used.
* Why FALSE?
* Using a common power meter is incorrect because it may not provide accurate readings or could disrupt network operation.
Thus, the correct answer is B .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: ONU Optical Testing.
* Optical Power Measurement Procedures by Huawei.