ITU-T L.109 PDF

This Recommendation describes cables containing both optical fibres and metallic wires and covers the following aspects.

– Optical/metallic hybrid cables for communications systems;

– Construction of optical/metallic hybrid cables. The optical fibre dimensional and transmission characteristics should comply with [ITU-T G.652], [ITU-T G.653], [ITU- T G.654], [ITU-T G.655], [ITU-T G.656], [ITU-T G.657] and [IEC 60793-2-10]. Dimensional and transmission characteristics of metallic wires and coaxial units for telecommunication applications and systems should comply with [b-ITU-T TR-OFCS];

– Cables designed for outdoor, indoor, or indoor-outdoor use: fibre-to-the-antenna (FTTA) or distributed antenna systems (DAS) cables are examples of such hybrid cables;

– Cables for limited powering applications found in communications systems.

– A recommendation that an optical/metallic hybrid cable should be provided with cable-end sealing and protection during cable delivery and storage, as is usual for metallic or optical cables. If splicing components have been factory installed, they should be adequately protected;

– A recommendation that pulling devices can be fitted to the end of the cable if required.

Three types of optical/metallic hybrid cable are considered in this Recommendation according to the usage of the metallic wires, such as Type I: communication only, Type II: power feeding only, and Type III: both power feeding and communication.

Individual requirements for Type II optical/metallic hybrid cable which supports a bit rate up to 1 Gb/s or beyond can be found in [ITU-T L.109.1].