Yealink SIP-T20 Entry Level IP Phone (discontinue)


Yealink SIP-T20 Entry Level IP Phone

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


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


Telnet/HTTP/HTTPS server

DNS client

NAT/DHCP server


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


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 2×15 characters lines

31 keys including 9 function keys

4 LEDs: 1xpower, 2xline, 1xmessage

1xRJ9 handset port

1xRJ9 headset port

2xRJ45 10/100M Ethernet ports


Power adapter: AC 100~240V input and DC 5V/1.2A Output

Power over Ethernet (IEEE 802.3af)

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