Boeing 757-300 Takeoff Config Warning Test 

Take off warning config test initiated from the rear panel behind the first officers seat. Advancing the throttles while parked will not result in the T/O warning sounding. I assume that the warning does not arm until after engines have started. I also assume that this plane has the newer warning sound due to it being built in 2002, unlike most 757s and 767s. that have the older config warning sound.