xDSL
x Digital Subscriber Line
x = A (Asymmetric) x = H (High-speed)
existing copper networks to be re-used for high-speed services
- ADSL - up to 640kbit/s upstream and up to 6Mbit/s downstream (Internet, VoD)
- HDSL - 2 Mbit/s symmetric (e.g. GSM base stations)
commercial ADSL services launched this year throughout Europe, USA and Japan
developed in partnership with T1 of the USA