Over deze norm
||Fibre optic communications
Specifies the requirements of single-mode optical fibre cables and cable elements which are intended to be used primarily in public telecommunications networks. Other types of applications requiring similar types of cables can be considered. Requirements for cables to be used in ducts or for directly buried application and aerial cables are covered in this standard. For aerial applications, this standard does not cover all functions aspects of cables installed in the vicinity of overhead power lines. In the case of such application additional requirements and test methods may be necessary. Moreover, this standard excludes optical ground wires and cables attached to the phase or earth conductors of overhead lines.