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Sub-TLVs describing Sonet/SDH TE Links
TE Link Capabilities (less frequent updates) defined per order (i.e. LOVC/VT or HOVC/STS SPE):
LD-MC sub-TLV: TE Link Sonet/SDH Multiplexing Capability
LD-CC sub-TLV: TE Link Sonet/SDH Concatenation Capability (including CC & VC) w/ full flexibility
LD-TC sub-TLV: TE Link Sonet/SDH Transparency Capability
Resource Allocation (# unallocated timeslots per TE Link) implying more frequent updates
LD-UT sub-TLV: TE Link #Unallocated Timeslots
Note: blocks of unallocated timeslots can be considered