Get on Amazon.com : http://www.amazon.com/gp/product/B000E57DSI?tag=clothingattes-20<br /><br />Linksys SPA3000 Analog Telephone Adapter 1 Port FXO 1 Port FXS<br /><br />One PSTN FXO port to connect to a Telco or PBX circuit <br />One RJ-11 POTS Plain Old Telephone Service FXS port to connect an existing analog phone or fax machine <br />One RJ-45 network port to connect to your router <br />FXS and FXO lines that can be independently configured <br />Works with Asterisk FreePBX or other SIP based VOIP PBX
