User dialing is a very important link in voice service

the access network fulfi ls user number receiving and cooperates with LE（Local Exchange） to realize the voice call function. Through combing user dialing methods

we compared the difference in traditional circuit-switched network and digital voice network. The application of three different user number receiving modes and the relationship among them in the digital voice network had been reported. We focused on the user number reception according to the digitmap. Through the typical interactive signal

we analysd the important factors affecting the digitmap effi ciency which includes matching mode

timer and so on. On the basis of the above factors

we reported how to construct the digitmap

and we had carried on the discussion and summary combined with engineering application.