An ATA is an adaptor that connects to a high-speed Internet connection and simply turns an analog phone into an IP telephone to start you making and receiving VoIP calls.
Do you want to keep your PSTN number too? Look at the ATAs with an FXO port here
FXS - Foreign Exchange Station. The port on a VoIP ATA for connecting directly to phones, faxes, and Analogue ports on PBXs.
FXO - Foreign Exchange Office. A port on a VoIP device to connect PSTN lines.
Basically it plugs into your telephone wall outlet and allows your ATA to work with both your SIP line and your PSTN line -
ATAs with FXO: Linksys SPA3000 / SPA3102 / engin Voice Box 2 / engin Voice Box 3
Locked/Preconfigured ATAs & Phones Explained
Do you already know the VoIP provider you want to sign up with? Check out these locked and preconfigured VoIP devices to buy at VoIPShop.com.au.
These ATAs are perfect for people wanting very little technical set up and to start making cheap VoIP calls. Click on the engin, gotalk, sipme or MyNetFone logo to view their products.
Terms and Conditions 
Analogue Adaptor - ATA->
GoTalk Products
