IEC 60794-3-20:2008(E) covers optical self-supporting aerial telecommunication cables. Requirements of the sectional specification IEC 60794-3 for duct, buried and aerial cables are applicable to cables covered by this standard. This second edition cancels and replaces the first edition published in 2002. It constitutes a technical revision. The main changes are listed below: - the fibres specification clause (Clause 5) has been enlarged to include fibre Types B5 and B6.a; - an annex has been added for additional requirements according to the MICE table.