VoIP ATA

A VoIP FXO (Foreign Exchange Office) Gateway bridges the VoIP and PSTN networks by enabling both voice and fax communications.

TCP/IP V4 (IP V6 auto adapt)

ITU-T H.323 V4 Standard

H.225 V4 Standard

H.245 V7 Standard

H.235 Standard(MD5,HMAC-SHA1)

ITU-T G.711 Alaw/ULaw, G.729A, G.729AB, and G.723.1 Voice Codec

RFC1889 Real Time Data Transmission

Proprietary Firewall-Pass-Through Technology

SIP V2.0 Standard

Simple Traversal of UDP over NAT (STUN)

Web-base Management PPP over Ethernet (PPPoE)

PPP Authentication Protocol (PAP) Internet Control Message Protocol (ICMP)

TFTP Client

Hyper Text Transfer Protocol (HTTP)

Dynamic Host Configuration Protocol (DHCP)

Domain Name System (DNS)

User account authentication using MD5

Out-band DTMF Relay: RFC 2833 and SIP Info