DSL - FAQ Qwest
What are the various types of DSL
DSL Highspeed Internet Access
DSL is a generic term used for a family of related technologies, including RADSL, ADSL, SDSL, IDSL, and others. The leading DSL technologies being deployed today include:
RADSL - (Rate Adaptive Digital Subscriber Line)
- Most robust business DSL available today;
- Developed to overcome line impediments;
- Automatically adjusts for environmental conditions; - Because RADSL is a type
of SDSL, it supports symmetric (equal downstream and upstream) data
transmissions up to 768K.
ADSL - Asymmetrical Digital Subscriber Line - ADSL supports a range of
asymmetric (higher downstream than upstream) data speeds that can reach up to 7
mbps downstream and 1.5 mbps upstream. ADSL can deliver simultaneous high-speed
data and telephone service over the same line.
SDSL - Symmetric Digital Subscriber Line - SDSL supports symmetric (equal
downstream and upstream) data transmissions up to 1.54 mbps.
