Digital Subscriber Line - (DSL)
	Digital data transmission over telphone lines.
In Practice	DSL is a technology for delivering digital data over analog-modulation telephone lines [copper wires]. DSL is distance sensitive, the greater the distance to the ISP, the lower the speed. Some DSL distance limitations: 2.5 miles - [ADSL] 1.5Mbps/384Kbps 3 miles - [SDSL] 768Kbps 3.5 miles - [SDSL] 384Kbps 4 miles - [SDSL] 192Kbps Over 4 miles - 144Kbps