What is the maximum speed of the Single Mode Fiber Optic used in 10GBase-ER?

The maximum speed of Single Mode Fiber Optic used in 10GBase-ER is 10 Gbps (gigabits per second). This standard allows for high-speed data transmission over long distances, typically up to 40 kilometers, using single mode fiber. The technology is designed for efficient long-range communication with minimal signal loss.