Features:

01)TCP/IP V4 (IP V6 auto adapt)
02)ITU-T H.323 V4 Standard
03)H.2250 V4 Standard
04)H.245 V7 Standard
06)H.235 Standard(MD5,HMAC-SHA1)
07)ITU-T G.711 Alaw/ULaw, G.729A, G.729AB, and G.723.1 Voice Codec
08)RFC1889 Real Time Data Transmission
09)Proprietary Firewall-Pass-Through Technology
10)SIP V2.0 Standard
11)Simple Traversal of UDP over NAT (STUN)
12)Web-base Management
13)PPP over Ethernet (PPPoE)
14)PPP Authentication Protocol (PAP)
15)Internet Control Message Protocol (ICMP)
16)TFTP Client
17)Hyper Text Transfer Protocol (HTTP)
18)Dynamic Host Configuration Protocol (DHCP)
19)Domain Name System (DNS)
20)User account authentication using MD5
21)Out-band DTMF Relay: RFC 2833 and SIP Info