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- Yealink IP phone- SIP 2.0 (RFC3261) protocol- NAT transverse: STUN mode- IP assignment: DHCP/ static IP- Auto provision via TFTP/FTP/HTTP/PnP- QoS: IEEE 802.1p/q tagging (VLAN), layer 3ToS- In-band, out-of band (RFC2833) and SIP INFO DTMF- Proxy mode and peer-to-peer SIP link mode- Wideband codec: G.722- Narrowband codec: G/A, G.726, G.729AB, G.723.1- Voice activation detection (VAD)- Comfort noise generation (CNG)- Adaptive jitter buffer (AJB), AGC, PLC- Volume control, Ringtone selection- Tone scheme, distinctive ringtone- 1 VoIP account, hotline- Call hold/waiting/transfer/forward/park/pickup- Voicemail, MWI, speed dial, dial plan- 3-way conferencing, DND, mute- Admin/user configuration mode- Direct IP call without SIP proxy- Integrated voice response (IVR) system- TI TITAN chipset- 20 keys including 2 programmable keys- 4 feature keys (transfer/hold/mute/redial)- 1xdual-color LED, phone label- 1xRJ45 10/100M ethernet port- Power over ethernet (PoE): IEEE 802.3af class 1- Desktop with footstand (detachable), wall-mountable- Power supply not includedYEASIPT18P
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