1. 2 FXS phone ada[pter , Support  SIP protocol
2. One RJ-45 port for 10Base-T Ethernet connection
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. G.711a/u, G.726, G.729, and G.723.1 Voice codec
7. Supports DTMF tone detection and generation
8. Web-based configuration through a built-in web server