ADSL Interleave Mode:
Interleave mode is used in ADSL to improve error correction by interleaving data bits before transmission.
This process introduces additional latency (delay) but enhances stability by reducing the impact of impulse noise.
Why B?
Better stability: Interleaving spreads errors across multiple frames, making it easier to correct them.
Longer delay: The interleaving process adds latency due to the time required to reorder data bits.

* 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.