Gears of War 3 has fire alarms on the Checkout map
http://www.youtube.com/watch?v=MkFqfQy1WEs&feature=related&t=0m11s - note I have the first parts skipped because there are possible objectionable words in the intros.
http://www.youtube.com/watch?v=ZlmCMtnkE6Y&feature=relmfu&t=0m09s
The pull has a bell image and has a handle on the bottom and has a profile like an EST/Edwards 270 series. It triggers a 1-second on, 3-second off buzzer tone and a burglar-alarm siren tone, lasting for 15 seconds.