Do i need a X100p card for timing?

i have 1 pc server with vicidial now installed, 12 agent comps, 2 cisco routers, i havent tested it with more then 1 call at a time because i don't have agents yet.
Will I need some kind of timing device? Can someone explain to me exactly what the x100p card does?
thanks.
Will I need some kind of timing device? Can someone explain to me exactly what the x100p card does?
thanks.