La description

1. A powerful and flexible configuration to support digital relay 2M ( PRI ) board. 

WS**4 ( 8D ) models can be derived from the basic 8 Co Lines *6 exts, flexible expansion to **4 Co Lines **2 exts. It has excellent scalability adaptability and capacity. Enterprises in the initial stage can buy a small capacity configuration, along with the development of enterprises and gradually add the affordable expansion boards, thus protect initial investment, and ensure the communication system with automatic adaptation capabilities of enterprise growth.

2.IP Economical Routing Call. Make China Telecom, China Unicom, China Netcom, China Jitong,  the IP card account, password one-time to the switching system. When dialing long distance call, system will go through IP Economical Routing automatically. It is very easy to operate, as well to save money at most;

3. Built in Four Road computer operator (can be expand to *2 road), convenient for the user at different working mode, first section: Hello, please dial the extension number, please dial 0 for checking; second section: extension is busy now, please dial other extension number; third section: no answer, please dial other extension number; fourth section: Hello, the number you dialed does not exist, please check it again; etc..

4. Single page navigation, Innovation of the single number group callfunction.