Amazon has the Polycom VoIP Telephone / Fax Adapter, model no. OBi200, for $39.99 (49.99 – 10 instant savings) with Free Shipping for a limited time. NewEgg also has it for the same price with Free Shipping for a limited time.
The Polycom (OBIHAI) OBi200 allows you to make and receive phone calls using your high-speed internet, your regular home phone, and a “VoIP” Internet phone service provider like Google Voice. This enables you to call free or at a fraction of the cost, a traditional telco would charge. Simply connect your analog phone and internet to the OBi200 and activate your device through the Polycom OBiTALK portal to start making and receiving calls in minutes. No computer is needed. The dedicated device with a high-performance system-on-a-chip platform ensures you can clearly hear every important word in your phone conversation.
The Polycom OBi200 supports up to four VoIP services like Google Voice, Anveo, VoIP.ms, and PhonePower. Local, long-distance, and even international calling are all possible. Calls from your OBi device to other OBi devices are always free via the OBiTALK network.