The value of this field indicates the kind of wanted link protection. The default value is NONE. if value is changed in Snc(1)then an entry is created in Snc table with the same index. But this table has to be completed (by setting the PIC,...) to obtain a configured protection. if value is changed in None(0)then the associated entry in Snc table is deleted. When the value is set to Snc for a particular entry of LinkTable, other links which are in relation (of direction or protection) with this main link remain setting to None for this field. But all links are set to the USED(1) value in the next field (linkProtectionStatus)