Phone Features: Sync over the air (Seamless handover and roaming), Up to 100 simultaneous calls, Up to 30 base stations, Up to 8 WB (4 active handsets) calls per base, Up to 8 NB calls per base, Up to 100 handsets, Up to 100 VoIP accounts, Management: Auto-provision via TFTP/FTP/HTTP/HTTPS/RPS, Auto-provision with PnP, Handset upgrade: OTA (Over-The-Air), Configuration: browser/phone/auto-provision, Trace package and system log export, Audio Features: Full-duplex speakerphone, Hearing Aid Compatibility (HAC) compliant, DTMF, DECT: Frequency bands: 1880 – 1900 MHz (Europe), 1920 – 1930 MHz (US).