What is the maximum upstream data rate supported by XG-PON1 (10G-PON) access architecture?

The maximum upstream data rate supported by XG-PON1 (10G-PON) access architecture is 2.5 Gbps. XG-PON1 is part of the ITU-T G.987 standard, which provides an enhanced optical access network capable of delivering high-speed broadband services. Specifically, XG-PON1 features downstream data rates of up to 10 Gbps while supporting upstream data rates of up to 2.5 Gbps.

This architecture is designed to meet the increasing bandwidth demands of users, allowing for a substantial increase in data transmission speeds compared to earlier PON technologies. The specification emphasizes the importance of accommodating both high downstream and reasonable upstream rates to support symmetrical traffic, although the focus is on higher downstream capabilities for most consumer applications.

It's essential to understand that the higher rates specified in other options do not apply to XG-PON1, as they pertain to different standards or future enhancements within the PON family, such as XGS-PON, which provides 10 Gbps upstream capability.