See also: Asymmetric DSL, High Speed DSL, Symmetric DSL, Very High-Speed DSL

CIMM DEFINITION: Modem telecommunications technology that enables broadband, digital data to be transmitted over ordinary telephone line. DSL comes in many flavors, known collectively as xDSL. (Source: itvt.com/glossary)

2: A high-speed dedicated digital circuit from a given location to the telephone company’s central office, using normal copper telephone lines. DSL is the main form of consumer broadband worldwide. It is a general term that includes several variations: ADSL (Asymmetric Digital Subscriber Line), ranging up to 1.5 Mbps; HDSL (High-bit-rate Digital Subscriber Line), 1.5 Mbps; SDSL (Single-line Digital Subscriber Line), 1.5 Mbps; VDSL (Very high-data-rate Digital Subscriber Line), ranging up to 2.3 Mbps; and RDSL (Rate Adaptive Digital Subscriber Line), various speeds. (Source: IAB)