What is this white paper about?
Wavelength division multiplexing (WDM) technology multiplexes multiple optical carrier signals onto a single optical fiber, enabling high traffic capacity. Protection (multiple diverse paths) is essential for many organizations to ensure the availability of the link and the data carried.
Following legislation worldwide enterprises need to have in place disaster recovery and business continuity procedures. This ensures that data is stored in different facilities and transported over different paths.
This white paper discusses two optical facility protection methods: electrical switching and optical switching.
Electrical switching uses a cross connect to duplicate and select the working or protecting paths, using two independent optics and two sets of mux/demux per each path.
Optical switching uses an optical switch to select the working or protecting paths.