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Cisco ONS 15600 Reference Manual, R7.2
Chapter 3 Card Protection
3.3 External Switching Commands
A Manual switch will switch traffic if the path has an error rate less than the signal degrade. A Force
switch will switch traffic even if the path has signal degrade (SD) or signal fail (SF) conditions;
however, a Force switch will not override an SF on a 1+1 protection scheme. A Force switch has a higher
priority than a Manual switch.
Lockouts prevent traffic from switching to the protect port under any circumstance , thus they can only
be applied to protect cards. Lockouts have the highest priority. Another way to inhibit protection
switching in a 1+1 configuration is to apply a lock- on to the working port. A working port with a lock-on
applied cannot switch traffic to the protect port in the protection group (pair).