1.Caller ID for C.O Lines and extension,telephone number is not lost when transferring .             

2.2.Outline calling on duty manual/automatic mode,Ringtone mode.        

3.Four-sections of digital recording can be30 seconds .(optional 30s-90s).            

4.When calling no one answer or the line is busy can be transferred .       

5.Calling level for extension and the talking time is limited .           

6.The extension number ranges can be mixed .          

7.Outline or inline calls can be answered the Phone for Others , transfer, retention, monitor .        

8.Checking telephone caller id number and voice checking .            

9.Real time clock, manual/automatic service day and night .            

10.Outline routing, automatic IP dial-up, outline connected number.        

11.Call center function, extension hotline number, Ringtone function.             

12.Automatic on duty and abbreviated dialling .        

13.Voice call inputted by computer .           

14.Mobile account.       

15.PC programming management, billing .        

16.Remote maintenance, hardware self-tested .