1.  2 sip phone port

2.  1 RJ-45 port for 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