Spec Sheet Preview: The Alpha Communications® SF117/4A Emergency Pull Switch features a rugged, long-life, positiveacting switch mounted on a durable ABS plastic faceplate. Signaling an emergency requires just a short pull on the 6' long nylon cord, in any direction. The signal cannot be canceled except at the point of origin. The SF117/4A provides four (4) circuits to operate 1- 4 signaling devices, such as a remote annunciator lamp, and a corridor dome lamp, as well as signaling circuits to operate additional options such as floor bell(s) and …