The popularization of the Internet drives the rapid development of a wide variety of IP-based
applications. The IP telephone technology has become the major means for operators to develop voice
services now. Especially, IP technology becomes the core of the next generation network (NGN), so the
IP-based voice technology will keep soaring speeding the future and become the No. 1 choice of new
operators in exploring services. 
As an Integrated Access Device, the upstream port of the ATA can be directly connected to the IP
 
network, to provide basic accesses for POTS users. This user port gateway can support four telephone lines.
It is also applicable for small-size enterprises and IP telephone bars. 

Detailed instructions please download the document.