BS EN 60794-2-21:2012 Optical fibre cables. Indoor optical fibre cables. Detailed specification for multi-fibre optical distribution cables for use in premises cabling
2012BS EN 60794-2-21:2012 Optical fibre cables. Indoor optical fibre cables. Detailed specification for multi-fibre optical distribution cables for use in premises cabling
2006BS EN 60794-2-21:2006 Optical fibre cables - Indoor cables - Detailed specification for multi-fibre optical distribution Cables for use in premises cabling