The lockout protection command (tools>perform>aps>lockout) disables use of the protection line. Since the command has the highest priority, a failed working line using the protection line is switched back to itself even if it is in a fault condition. No switches to the protection line are allowed when the line is locked out. Refer to the 7705 SAR OAM and Diagnostics Guide, ‟Tools”, for information on the APS lockout command.