Yealink YEA-SIP-T21P-E2 Entry-level IP phone with 2 Lines & HD voice Type: Telephone Ports: 2 x RJ45 10/100M Ethernet ports Power over Ethernet (IEEE 802.3af), class 2 1 x RJ9 (4P4C) handset port 1 x RJ9 (4P4C) headset port LEDs: Yes Power: External universal AC adapter (optional): AC 100~240V input and DC 5V/600mA output Power consumption (PSU): 1.2-1.9W Power consumption (PoE): 1.8-2.3W Dimensions: 5.91 x 8.23 x 7.40 Specifications: Audio Features HD voice: HD handset, HD speaker Wideband codec: G.722 Narrowband codec: G.711(A/µ), G.723.1, G.729AB, G.726, iLBC DTMF: In-band, Out-of-band(RFC 2833) and SIP INFO Full-duplex hands-free speakerphone with AEC, VAD, CNG, AEC, PLC, AJB, AGC Phone Features 2 VoIP accounts Call hold, mute, DND One-touch speed dial, hotline Call forward, call waiting, call transfer Group listening, SMS, emergency call Redial, call return, auto answer Lo...