IEC 60794-1-21 18A 

UNIVER BTC-1000 Series is designed to determine the ability of optical fiber cable to withstand bending around rollers or bows during installation, when specified load is applied.
This machine is capable of conducting both test procedure 1 (180°) and 2 (reverse bend over a pair of rollers) according to Method E18A on IEC 60794-1-21. These tests are generally considered to simulate bending that any type of cable may experience during installation.