| 摘要 |
<p>It is herein described a linear optical transmission system with failure protection wherein the protection is totally accomplished at an optical level, and it operates on the entire system, and not just at a local level. This is accomplished, in a linear system for the transmission of N signals from a first station to a second station, by providing in each station an optical communication path for each signal, and a single shared optical communication path, as well as a communication path for a protocol between the two stations for managing the protection requests arising from optical failure detectors in the optical communication paths and optical switching sections in the two stations for selectively switching the signal propagating along the optical communication path having an optical failure onto the shared communication path. Arrangements of optical switching suitable to the implementation of said system are also described.</p> |
