Yealink SIP-T21 HD Voice VoIP Phone w/ 2 Lines
Yealink SIP-T21 HD Voice VoIP Phone w/ 2 Lines

Yealink's new SIP-T21 uses a 132 x 64-pixel large graphic LCD display, which can display a clear 5-line data screen for a smoother user experience and high-fidelity audio functions. This phone uses two 10/100 Mbps network ports, and is very suitable for use on a wide network. It supports T21 IP accounts, simple, flexible and secure installation options as well as support for IPv6, Open VPN and backup servers. SIP-T21, entry-level IP phone (without POE) 2 My graphic SIP account with 132 x 64 pixels LCDHD audio: High fidelity XML / LDAP speaker open 2xLAN VPN headphone connection with HD audio power supply, subwoofer resolution, high Ethernet headphone Dual Port Resolution 10/100, XML / LDAP Wall Mounted Remote Phone Function: 2 VoIP Accounts for End Call, Mute, Do Not Disturb, Quick One-Button Call, Hotline Redial, Redial, Auto Answer, Call Waiting, Forward Calls, group monitoring, local SMS, three-way conference, no SIP proxy software that can set direct IP call ringtone / import / remove keypad lock, emergency call, manual or automatic time setting, call plan, XML browser, url address Playback and playback are URI audio function: full duplex loudspeaker with AEC: G-Codec. 722 (wide band), G.711 (A / μ), G.723, G. 729AB, G.726 DTMF: In-range, Out of Band (RFC 2833) and SIP INFO VAD, CNG, AE C, PLC, AJB, AGC

  •  High-definition audio: high-definition codec, high-definition phone, high-definition telephone amplifier
  • 132 x 64 pixels high-definition audio LCD: HD codec
  • XML / LDAP remote phone book
  • Dual Port 10/100 Ethernet Switch
  • XML / LDAP phone book for HD mobile phones

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