DIN EN 61291-2:2008 Optical amplifiers - Part 2: Digital applications - Performance specification template (IEC 61291-2:2007); German version EN 61291-2:2007
2016DIN EN 61291-2:2016 Optical amplifiers - Part 2: Single channel applications - Performance specification template (IEC 61291-2:2016); German version EN 61291-2:2016
2012DIN EN 61291-2:2012 Optical amplifiers - Part 2: Digital applications - Performance specification template (IEC 61291-2:2012); German version EN 61291-2:2012
2008DIN EN 61291-2:2008 Optical amplifiers - Part 2: Digital applications - Performance specification template (IEC 61291-2:2007); German version EN 61291-2:2007