ITU-T L.43 PDF

Optical fibre cables are traditionally used in trunk line networks, but their use is expanding rapidly to access networks. Today, many cables are buried in order to respect the environmental landscape, to reduce network construction costs or to reduce the extension of underground facilities like ducts and tunnels.

When they are installed without ducts, tunnels and hard protection, cables should have good resistance characteristics to harsh conditions. Some cables have strong outer armouring, others have outer pipe-systems or special plastic sheaths.

This Recommendation:

– refers to multi-mode graded index and single-mode optical fibre cables to be used for telecommunication networks in direct buried installations;

– considers the mechanical and environmental characteristics of the optical fibre cables. The optical fibre dimensional and transmission characteristics, together with their test methods, should comply with one or more of: [ITU-T G.651.1], [ITU-T G.652], [ITU-T G.653], [ITU-T G.654], [ITU-T G.655], [ITU-T G.656] or [ITU-T G.657];

– considers the fundamental aspects related to optical fibre cable from mechanical and environmental points of view.