FLX UC 1500 VoIP & USB Conference Phone with Extension Mics A new standard in conference phone audio, double as a high-performance IP conference phone and a USB audio device, Revolabs designs innovative conference phone to enable truly unified communications by supporting both USB audio for PC communication tools and SIP telephony for market leading IP PBXs.About VoIP Phone Firmware:Firmware updates for VoIP Phones are very important as they usually contain many bug fixes, add new features a...