Ring ring, your iPhone is ringing
Ring a ding ding ding doh
Silence (used to ignore calls)
Police Radio
Our Man Flint (Austin Powers)
Star Trek  - Red Alert
Airport
You got mail
Asshole
S.O.S.    Morse Code
LCARS - "Incomming Subspace Signal"
Little Piggy - Weeeeee!!!!!
Close Encounters - 5 tones
Nature - birds chirping