Yealink SIP-T20 Entry Level IP Phone without PoE, TI TITAN chipset and TI voice engine, 3-line LCD with an icon line and 2x15 characters lines, 31 keys including 9 function keys, 2xRJ45 10/100M Ethernet ports, 2 VoIP accounts, hotline, emergency call; Call waiting, call transfer, call forward; Hold, mute, flash, auto-answer, redial; 3-way conference, DND, speed dial; Phonebook import/export, call history; Volume adjustment, ring tone selection; Tone scheme, System log; Voicemail, Intercom; Localized language, Local phonebook; FTP/TFTP/HTTP, PnP Auto-provision; SRTP/HTTPS/TLS, VLAN, QoS; Headset, Wall-Mounted

Phone Features

• 2 VoIP accounts, hotline, emergency call
• Call waiting, call transfer, call forward
• Hold, mute, flash, auto-answer, redial
• 3-way conference, DND, speed dial
• Phonebook import/export, call history
• Volume adjustment, ring tone selection
• Tone scheme, System log
• Multi-language (more than 20)

IP PBX System Integration

• Dial plan, dial-now
• Voicemail, MWI
• Intercom, Paging
• Call park, call pickup
• Distinctive ringtone

Codecs and Voice Features

• Wideband codec: G.722
• Narrowband codec: G.711, G.723.1, G.726, G.729AB
• VAD, CNG, AEC, PLC, AJB, AGC
• Full-duplex hands-free speakerphone with AEC

Network Features

• SIP v1 (RFC2543), v2 (RFC3261)
• NAT Traversal: STUN mode
• DTMF: In-Band, RFC2833, SIP Info
• Proxy mode and peer-to-peer SIP link mode
• IP Assignment: Static/DHCP/PPPoE
• TFTP/DHCP/PPPoE client
• Telnet/HTTP/HTTPS server
• DNS client
• NAT/DHCP server

Management

• FTP/TFTP/HTTP/PnP auto-provision
• Configuration: browser/phone/auto-provision
• Direct IP call without SIP proxy
• Dial number via SIP server
• Dial URL via SIP server

Security

• HTTPS (server/client)
• SRTP (RFC3711)
• Transport Layer Security (TLS)
• VLAN (802.1 pq), QoS
• Digest authentication using MD5/MD5-sess
• Secure configuration file via AES encryption
• Phone lock for personal privacy protection
• Admin/user configuration mode

Physical Features

• TI TITAN chipset
• 3-line LCD with an icon line and 2x15 characters lines
• 31 keys including 9 function keys
• 4 LEDs: 1xpower, 2xline, 1xmessage
• 1xRJ9 handset port
• 1xRJ9 headset port
• 2xRJ45 10/100M Ethernet ports
• Wall-mounted
• Power adapter: AC 100~240V input and DC 5V/1.2A Output
• Power consumption: 1.4-2.6W
• Net weight: 0.77kg
• Dimension: 185 x 200 x 90mm
• Operating humidity: 10~95%
• Storage temperature: up to 60°C