The request or manual switch of active to protection command (tools>perform>aps> request) switches the active line to use the protection line (by issuing a manual switch request) unless a request of equal or higher priority is already in effect. If the active line is already on the protection line, no action takes place. Refer to the 7705 SAR OAM and Diagnostics Guide, ‟Tools”, for information on the APS request command.