一种基于SPCE061 A的窄带网络电话

A kind of narrow band network phones based on SPCE061A

介绍了SPCE061A的基本原理,并介绍了一个基于SPCE061A的窄带网络电话,这种窄带网络电话可以在任何有公用电话网的地方使用,享受其话费低廉的优越性,同时可以借助公用电话网实现邀约呼叫,呼叫不在线用户,突破了一般网络电话无法呼叫网下用户的局限。

This paper discusses the basic principle of SPCE061A and a kind of narrow band network phones based on SPCE061A,it can be used in any PTSN places and has the advantages of low costs.It can achieve the calling of request by PTSN,call offline user,and it breaks a localization that currently network phones can't call offline user.