An ATA is an Analog Telephone Adaptor.
It is a box which connects your voip calls to your analog telephone without the need of a computer. You need to program your ATA with your sip provider details (username, password, domain name and when needed proxy, stun-server etc.)
The ATA is connected to:
- Line in = PSTN = FXO
- Telephone = FXS
- internet via modem (cable / adsl)
- power suply
When all is correctly installed your phone is ringing when you get a voip call. You can also use your phone to make a voip call. There is no need for a computer.
A VOIP modem is a combination of an ATA with a modem in one box.
Good luck
