پروتکل SIP
RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP, ICMP, DNS (A record,SRV, NAPTR), DHCP, PPPoE,TELNET, TFTP, NTP, STUN
Codec های پشتیبانی شده
G.729A/B, G.711µ/a-law, G.726, G.722(wide-band), andiLBC,in-band and out-of-band DTMF (in audio, RFC2833, SIP INFO),