- Cortelco analog terminal adapter- SIP standardization deployed throughout- Two Voice Ports (RJ-11) support traditional analog touch tone telephones (corded or cordless) or fax machines- One Network Port (RJ-45) for connecting to broadband digital subscriber line (DSL) cable modem or wireless works- One PC Port (RJ-45) for connecting to a Personal Computer- One Line-In Port (RJ-11) for connecting to the PSTN (if available)- Call switching between VoIP and PSTN calls- Supports Caller ID/Name display or block Hold Call Waiting/Flash Call Transfer Call Forward in-band/out-of-band/SIP INFO DTMF Dial Plans etc- Supports 3-way conferencing- PSTN line default in case of power failureITT8212