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Link Capacity Adjustment Scheme (LCAS) Approved generic protocol (ITU-T G.7042/Y.1305) Defined independently of SDH, SONET or G.709 Works in combination with virtual concatenation LCAS specification has two components An end-to-end signaling part (with messages) Mechanisms enhance Virtual Concatenation to achieve hitless bandwidth modification LCAS currently defined for TDM networks SDH/Sonet (G.707) and G.709 OTH LCAS is the best solution for hitless bandwidth modification