Features  
IAX/IAX2 protocols  
yes
Call transfer  
yes
Calls Incoming status  
yes
Redial  
yes
Access voice mail message with one button  
yes
Call Forwarding  
yes
Do Not Disturb  
yes
Missed call Log  
yes
Dial Missed call  
yes
Hold function  
yes
Hold status (number of users waiting)  
yes
Quick dial  
yes
Mute  
yes
Logs  
yes
Support for multiple audio devices  
yes
Available codecs GSM, ulaw, alaw, speex, ilbc  
yes
DTMF tones sending  
yes
Echo cancellation  
yes
Adaptive Jitter Buffer  
yes
Address book  
yes
Automatic user registration  
yes
Account password encryption  
yes