The China major telcon  Huawei has successfully launched the industry's first Giga DSL (Digital Subscriber line) prototype. The Giga DSL system engages time division duplex (TDD) to achieve a total upstream and downstream rate of 1,000 Mbps over a single twisted pair.

Dr Long Guozhu, Huawei's principal expert of DSL technology said that it was inevitable that spectrum expansion would help us improve the rate of a twisted pair at a short distance, but after the spectrum is expanded, a technical issue appears: how to design the high-speed physical layer and high-frequency analog front end (AFE).

The Giga DSL prototype reduces radiation interference and power consumption, and provides a total upstream and downstream rate of one Gbps within 100 meters, and 500 Mbps-plus within 200 meters, making it a cost-effective option for telecom operators building ultra-broadband access networks.

The hurdles related to limited bandwidth of FTTB (fiber to the building)/FTTC (fiber to the curb), and difficulty in deploying FTTH (fiber to the home) drop cables can be curbed by locating optical fiber access points closer to users.

The 100 Mbpps-plus ultra-broadband access can be made available relatively quickly by utilizing legacy copper line resources, as providing 1,000 Mbps bandwidth within 100 meters of twisted pairs using DSL technology is more complex.