Vibrate? An NX-300 doesn't vibrate...
My school won't order me to disable my radio during class. I'm a first responder on campus 24/7, I respond not only to my Fire Departments calls, but to medical calls on campus.
You're a public servant to the community - no professor is going to tell me to turn my radio off. What if it's their child who was in a car wreck?
Depending on the law, your prof may be the ultimate authority. If their child was in a crash, the guys on the Engine, Rescue, Ambulance, Black and Whites. . . would respond.
I will not bash you as I completely can relate however when you are at school, be serious about school, dont be that guy. I was "that" guy for a while, and I paid for it by taking substantially longer to graduate and with my reputation. While I have some cool stories and experiences, I regret being an 19 year old pompous *** with a siren. Getting on with the Feds the first time made me think I was the greatest thing in the world. My transcript still carries a pair of F grades from that semester from a Political Science Professor my job (authority, cool factor in BDUs and Oakleys, Pelican Cases of toys) did not save me from.
911 jobs are great, cool, fun, and fulfilling however Emergency Service today is not what it was when we were growing up. Hold you head high and be a responder your peers and community respect and trust. Feel free to PM me if you would like to talk about doing EMS/Fire during college, I am fixing to graduate shortly but we are in the same boat.
That having been said, I like 2100Hz/500Hz alternating 5 bursts of each for 100 milliseconds. I have that pattern cycle 4 times with a 4 second delay between cycles as my pager. For my more discrete uppity alert, I use 700Hz (100ms) then silence alternating with 1000Hz (70ms each) for a total of seven tones alternating with six silent periods. I can use that in class, meetings, or when available in training and it is pleasant and uppity.
Best of luck this semester and in your career goals man.