当人们对融合PSTN和IP网络的初期成果抱有极高期望之时，业界仍然在等待真正的融合。电话号码映射（ENUM：telephonenumbermapping）标准把电话号码当作所有通信服务的单一接入点。利用因特网的现有域名服务器（DNS）设施，ENUM可以将ITUE．１６４电话号码译为IP地址，许多人将 The industry is still waiting for real convergence as people have high hopes for the initial results of converging PSTN and IP networks. The ENUM: telephonenumbermapping standard treats phone numbers as the single point of access for all communications services. Using the Internet’s existing Domain Name Server (DNS) facilities, ENUM can put ITUE. 164 phone number translated as IP address, many people will