OS1 and OS2, short for Optical Single-mode 1 and Optical Single-mode 2, are fibre optic cable standards
Fibre optic cables all have one common weakness: flexibility. The glass core and reflective cladding are essential to signal integrity, and accidentally twisting or bending the cable too much will force attenuation that can ruin your application with signal loss.
In a fibre optic system, there are several small devices and components, to which one might not give due credit and understand their importance.
Nowadays, many organizations are extending their Local Area Networks (LANs) to Metropolitan Area Network (MANs) to get uninterrupted, private access and control of their networks on several remote sites across the city from a central location.