Unfortunately, I couldn't find a free PDF download of the IEC 60794-1 standard. The standard is copyrighted by the IEC, and it's not publicly available for free download.
This standard applies to optical fiber cables used in various telecommunication networks, including fiber-to-the-home (FTTH), fiber-to-the-building (FTTB), and long-haul networks. Iec 60794-1 Pdf Free Download
You're looking for a paper on IEC 60794-1 and a possible free PDF download. Unfortunately, I couldn't find a free PDF download
Here's a brief paper on IEC 60794-1:
IEC 60794-1: Standard for Optical Fiber Cables including fiber-to-the-home (FTTH)