Cortelco VOIP corded telephoneIdeal for large organizations or SOHOWAN Port: 1 RJ45 10/100 Base-T Ethernet, line auto-sensing/ switchingPC Port: 1 RJ45 10/100 Base-T Ethernet, line auto-sensing/ switching2-Line, 16 character LCDSupports G.723.1, G729A/B, G.711 voice codecs Complies with RFC-3261, SIP standard, H.323 optionalDynamic IP support (DHCP and PPPoE)Remote software upgrade capability (via FTP)STUN SupportLarge message waiting indicatorCall historyVolume controlPhonebook10# One-touch memory keysRedial/holdHands-free speakerphoneBlack with silver trimITTVOIP2747