1. BS EN 61280-2-2:2012 Fibre optic communication subsystem test procedures - Part 2-2: Digital systems - Optical eye pattern, waveform and extinction ratio measurement

2. BS EN 61280-2-3:2009 Fibre optic communication subsystem test procedures - Part 2-3: Digital systems - Jitter and wander measurements

3. BS EN 61280-2-9:2009 Fibre optic communication subsystem test procedures -Part 2-9: Digital systems - Optical signal-to-noise ratio measurement for dense wavelength-division multiplexed systems

4. BS EN 61280-4-1:2009 Fibre optic communication subsystem test procedures - Part 4–1: Installed cable plant - Multimode attenuation measurement

5. BS EN 61280-4-2:2014 Fibre-optic communication subsystem test procedures - Part 4-2: Installed cable plant - Single-mode attenuation and optical return loss measurement

6. BS EN 61284:1998 IEC 61284:1997 Overhead lines -requirements and tests for fittings

7. BS EN 61285:2015 Industrial-process control - Safety of analyzer houses

8. BS EN 61287-1:2014 Railway applications - Power converters installed on board rolling stock - Part 1: Characteristics and test methods

9. BS EN 61290-1-1:2015 Optical amplifiers - Test methods - Part 1-1: Power and gain parameters - Optical spectrum analyzer method

10. BS EN 61290-1-3:2015 Optical amplifiers -Test methods - Part 1-3: Power and gain parameters - Optical power meter method