SL1
Encyclopedia : S : SL : SL1 : SL1
- redirect
SL1 was the first practical
digital PBX (Public Branch eXchange, or private
telephone switchboard), and in many ways, the first practical
digital switch. It was developed in the early
1970s at
Bell-Northern Research and sold by
Northern Electric (later
Nortel Networks).
From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.
