Yeastar YST-TA800 8 Port FXS Analog Telephone Adapter VoIP SIP FAX QOS Gateway Ports: 8 FXS Ports Telephony Interfaces: RJ11 Network Interfaces: 1 10/100Base-T Ethernet Network: DHCP, DDNS, OpenVPN, PPPoE, Static Route, VLAN Compatibility: Interoperable with 3CX, Asterisk, Lync Server, FreePBX and certified with Elastix and BroadSoft