What does SDSL stand for?

What does SDSL mean?

SDSL	Symmetric Digital Subscriber Line Computing » Networking
SDSL	Symmetric Digital Subscriber Line Business » International Business
SDSL	Symmetric Digital Subscriber Line Computing » General
SDSL	Symmetric Digital Subscriber Line Computing » Security
SDSL	Symmetric Digital Subscriber Line Computing » Telecom
SDSL	Symmetric Digital Subscriber Line Business » General
SDSL	Single Digital Subscriber Line Miscellaneous » Unclassified