1. 2 FXS phone ada[pter  Support T.38 FAX, 1 RJ-45 port LAN  Ethernet 
2. SIPv2: Session Initiation Protocol v2 (RFC 3261, 3262, 3263, 3264)
3. Supports Dynamic Host Configuration Protocol (DHCP)
4. Call Waiting,Transfer,Call Forwarding: No Answer / Busy / All
5. Call Return,Call Back on Busy,Call Blocking with Toll Restriction
6. Supports  G.711, G.726, G.729, and G.723.1 codec
7. Supports DTMF tone detection and generation
8. Web-based configuration through a built-in web server