Waits for the specified number of seconds. You can pass fractions of a second. For example, setting seconds to 1.5 would make the dialplan wait 1.5 seconds before going on to the next priority in the dialplan.

; wait 1.5 seconds before playing the prompt
exten => s,1,Answer()
exten => s,2,Wait(1.5)
exten => s,3,Background(enter-ext-of-person)