Classroom Phones The IT department has installed phones in all of the classrooms on campus for emergency and immediate technical needs. These phones dial only internal numbers and Emergency 911. To make a call, simply pick up the phone and dial the internal 4-digit extension or dial 911. There are quick-call buttons on these phones that you can press to get to the IT Help Desk, AV Support, Public Safety and the On-Campus Emergency number. These buttons are labeled on the phone screens next to the perspective button. To find the internal 4-digit extension for an office or person on campus, use our online directory and dial by department or search by name.