Fiber-optic power meters used in FTTH networks must measure which two wavelengths?

In Fiber-to-the-Home (FTTH) networks, the typical wavelengths used for downstream and upstream communications are critical for effective signal transmission and measurement. The correct wavelengths for fiber-optic power meters in these networks are 1,490 nm for downstream traffic and 1,625 nm for upstream monitoring and maintenance.

The choice of 1,490 nm is primarily used for high-speed data transmission, while 1,625 nm is often employed for measurements and reflector applications, allowing technicians to monitor the system without disrupting the existing data flow. This dual-wavelength capability is essential for ensuring the integrity and performance of FTTH services during installation and ongoing maintenance.

Other options feature wavelengths that may not align with the standard practices for FTTH networks, resulting in less effective or non-standard measurements. Therefore, understanding the key wavelengths used in FTTH networks is vital for accurate measurements and maintenance of fiber-optic systems.