According to Huawei HCIP-Access V2.5 learning materials and official Huawei Access Network product documentation, a 10G EPON PONI port supports both EPON (1.25 Gbit/s) and 10G EPON (10 Gbit/s) transmission modes.
These two modes are not combined — they operate on different wavelengths and serve different types of Optical Network Units (ONUs):
EPON uses a 1490 nm wavelength for downstream transmission with a rate of 1.25 Gbit/s.
10G EPON uses a 1577 nm wavelength for downstream transmission with a rate of 10 Gbit/s.
When an OLT (Optical Line Terminal) port supports dual-mode operation, it automatically adapts to the connected ONU type — but it does not aggregate the bandwidth of both technologies. Each ONU communicates using only one rate (either EPON or 10G EPON).
Therefore, the total downstream bandwidth is not the sum of both rates. It depends solely on the ONU’s operational mode.
Hence, the statement is False.
Answer: B
References (from HCIP-Access V2.5 and Huawei Technical Documents):
HCIP-Access V2.5 Study Guide – “Huawei Campus Network Overview” Chapter, Section: PON Technologies Overview
Huawei Access Network 10G EPON Technology White Paper (Huawei Enterprise Documentation Center)
Huawei MA5800/EA5800 Series OLT Product Description – “Dual-Mode EPON/10G EPON PON Ports”
