The economical Zoom Model 5806 Voice over IP Telephone Adapter allows standard analog telephones to make and receive calls over a broadband Internet connection. Simply plug a conventional or cordless phone into the adapter and then plug the telephone adapter into a broadband-connected router or Internet gateway. A minimum of five attached phones can be rung simultaneously using the built-in ring generator.The Model 5806 supports industry-standard Session Initiation Protocol (SIPv2) and works with a wide range of service providers and SIP-based VoIP equipment. Voice over IP Service providers can deliver a rich variety of advanced telephone services through the Model 5806 including CLASS features such as Call Waiting, Caller Identification, Call Transfer, Call Hold, Call Forwarding, Distinctive Ringing, and Voice Message Waiting Indication.The VoIP terminal adapters can be configured remotely using a TFTP or HTTP download from the service provider and updates to the firmware can be automatically delivered. Local configuration is done with a browser-based graphical user interface. The Model 5806 supports G.711, iLBC and G.729 voice codecs.