Cisco ONS 15600 Reference Manual page 82

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.
Lock outs can only be applied to protect cards and prevent traffic from switching to the protect port
under any circumstance. 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).
Cisco ONS 15600 Reference Manual, R6.0
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