This topic describes requirements for fiber connector protection.
The requirements are as follows:
All boards with optical ports must be packed properly, to avoid mechanical and electrostatic damages and to reduce vibrations.
The protective caps must be put in an ESD bag.
Protective caps must be installed on all optical fiber connectors when not in use. The optical fiber connectors must be stored in proper packages to keep them clean.
The protective caps not recommended are made of soft rubber, which are apt to absorb dust and sundries, and difficult to clean.