Personal VoIP Gateway SKG-300 Datasheet Manual Firmware FeaturesAuto detection and switching of incoming PSTN or Skype callsRJ-11 phone port to POTS phone, RJ-11 line port to PSTNOne handset for both PSTN and Internet callsNo need for microphone and speaker to make Skype callThree-way conference calling between PSTN and Skype callsSupports forward incoming PSTN call to Skype, and forward incoming Skype call to PSTNCall waiting Full-duplex and echo-free sound quality