BS EN IEC 60794-1-201:2024

1   Scope This part of IEC 60794‑1 defines test procedures to be used in establishing uniform requirements for the environmental performance of:

• optical fibre cables for use with telecommunication equipment and devices employing similar techniques; and

• cables having a combination of both optical fibres and electrical conductors.

Throughout this document, the wording "optical cable" can also include optical fibre
  units, microduct fibre units, etc. 
This document defines a test standard to determine the ability of a cable to withstand
  the effects of temperature cycling by observing changes in attenuation. 
See [IEC 60794‑1‑2](/search?q=IEC%C2%A060794%E2%80%911%E2%80%912) for a reference guide to test methods of all types and for general requirements and
  definitions.