Lock On: Locks traffic onto the working card, that is, prevents a traffic switch
from occurring. In a 1+1 configuration you can also 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). For splitter and Y-cable protection groups, CTC allows Lock On for a protect port if other switch conditions (Manual, Force) exist. Lock On is not available if the protect port already has a Lock Out or Lock On present.