The traditional telephone service is complex

its exploiting period is so long

and it depends on the equipment supply businessmen. Facing the customer’s demand which is changeful and individual little by little

in order to enlarge the intake

the operators require design various novel traffics expediently. In this regard

NGN assumes peculiar dominancy. So with the quick evolution of NGN

the application of the relative protocols will ripen unceasingly. In this paper

we demonstrate the character of NGN and relative protocols based on NGN.