Anybody can give a summary about Philips curve?

I am sort of confused about the anticipated and unanticipated change in demand, fiscal, monetary, inflation etc. What I do know now is that for anticipated change in inflation, SRPC will shift and for unticipated change, SRPC will move upward or downward. But anyone can give a clear picture on the relationship among unemployment, inflation etc? I found Schweser notes on this part is not very clear. Thanks alot!