Snom 320 VoIP Phone - RefurbishedA 100 number call memory 100 number onboard address book (to which data may easily be uploaded) custom call blocking configurable downloadable ring tones auto answer mode DND and other sophisticated features insure convenience and productivity Two line display with graphical field 47 keys, 13 LEDs 12 programmable function keys Speakerphone Dual Ethernet connection Power over Ethernet Headset connection SIP RFC3261 Security: SIPS SRTP STUN, ENUM, NAT,