1. Support Skype VoIP platform ( including SkypeOut &SkypeIn ) . 2. By regular phone, input the speed-dial number to dial the corresponding Skype contact . 3. By regular phone, use SkypeOut & SkypeIn to dial-up & switch-on . 4. By regular phone , through PSTN line to dial-up & switch-on . 5. When PSTN switched to VoIP ,user can dial up with VoIP by anytime and anywhere, basic on the protecting password. 6. When VoIP switched to PSTN,user can set fixed phone number or mobile phone number, then can receive VoIP incoming call by anytime and anywhere. 7. Leave message in voice-mail box,user can use the unit and PC as record-answer machine and can set greeting by himself. 8. Record communication voice secretly . 9. Built-in USB sound card , use DSP tech to reduce noise and cancel echo effectively. 10. The same ring tone of the PSTN line and VoIP. 11. Support DECT、2.4G、900M and other cordless phones . 12. Support phone group and PBX , realizing internet phone system . 13. Automatically check the PSTN line and switch-on between the PSTN and VoIP . 14. Stating light LED . 15. Easily realize the communication of PSTN-to-PSTN , PC-to-PC , PC-to-PSTN , PSTN-to-PC .