IP Gateway with 2 fxs

1)TCP/IP V4 (IP V6 auto adapt)
2)ITU-T H.323 V4 Standard
3)H.2250 V4 Standard
4)H.245 V7 Standard
6)H.235 Standard（MD5，HMAC-SHA1）
7)ITU-T G.711 Alaw/ULaw, G.729A, G.729AB, and G.723.1 Voice Codec
8)RFC1889 Real Time Data Transmission
9)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