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USB Internet phone function description：
The USB Internet Phone is voice comunication terminals over the internet，It is a different way of comunication from traditional telephones。It connects directly to PC through the USB port，With DSP chipset set inside。its sound is very clear，PC to PC is free of charge。You can make calls from PC to regular phone when the internet is connected with PSTN network by gateway，It is can work with cable and Dial-up internet, Broadband and LAN connections.It is especially suitable for those who make long-distance calls frequently。Easy to use, easy to set up。The best of all,it saves money；

USB Internet Phone Performance and features：

① PC to PC, and PC to Phone dialing capabilities；

② Compact, stylish and, portable for notebook PC users；

③ USB Phone support Skype H.323、SIP、MGCP；

④ Compliant with ITU-T G.723 speech compression；

⑤ Full duplex audio, echo cancellation；

⑥ Pierce through all private networks and NAT；

⑦ Rings on an incoming call；

⑧ Usb Phone( support Skype)Keypad for easy dialing；