The quality Yealink SIP-T21 Entry Level IP Phone  is a new SIP-T21 that uses an extra-large 132 x 64-pixel graphical LCD showing a clear 5-line data display offering a smoother user experience plus HD Voice characteristics. This phone uses dual 10/100 Mbps network ports that are ideal for extended network use T21 supports two VoIP account, simple, flexible, and secure installation options, plus support for IPv6, Open VPN and a redundancy server.

SIP-T21, Entry Level IP Phone (without PoE)

• 2 SIP accounts 
• 132 x 64-pixel graphical LCDHD Voice: HD Codec
• HD speaker
• HD handset XML/LDAP Phonebook
• Open VPN2xLAN ports
• Headset, with PSU
• HD Voice: HD Codec, HD speaker, HD handset
• Two-port 10/100 Ethernet Switch
• Headset, wall-mountable
• XML/LDAP remote phonebook

Phone Features:

• 2 VoIP accounts
• Call hold, mute, DND
• One-touch speed dial, hotline
• Redial, call return, auto answer
• Call forward, call waiting, call transfer
• Group listening, SMS
• Local 3-way conferencing
• Direct IP call without SIP proxy
• Ring tone selection/import/delete
• Keypad lock, emergency call
• Set date time manually or automatically
• Dial plan, XML Browser, action action URI

Audio Features:

• Full-duplex hands-free speakerphone with AEC
• Codecs: G.722 ( Wideband), G.711(A/μ), G.723, G.729AB, G.726
• DTMF: In-band, Out-of-band(RFC 2833) and SIP INFO
• VAD, CNG, AEC, PLC, AJB, AGC

2 SIP accounts, TI TITIAN chipset

HD Voice: HD Codec, HD speaker, HD handset
2 x15 characters LCD, 2xLAN ports, with PSU