Link Management Protocol Extensions for Link discovery Using Loss of Light
This document proposes an enhanced mechanism for Link Management Protocol’s Link Verification procedure that is independent of the data encoding type. It can be used for any point-to-point link, including both Optical Links and SONET/SDH Links. The general proposal is to use the transmission of light by the sender and recognition of the presence or absence of light by the receiver to identify port mapping. The proposal includes minor extensions to the existing messages to implement this extension to the link verification procedure.