Yealink SIP-T21P

PoE entry-level IP desktop phone with HD voice quality and extra large display

4.6 of 15 Reviews
Key features
  • 2 IP accounts
  • 132 x 64 pixel 5-line display
  • Dual 10/100 Ethernet ports/PoE
  • RJ9 headset port
  • HD voice
  • Compatible with leading IP PBX providers: Alcatel - Aastra - Avaya - 3CX - Asterisk - Sipleo

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Internal ref: YEALINKT21P
Manufacturer part #: SIP-T21P
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Product description

Entry-level IP phone that features HD audio and 5-line LCD display

The Yealink SIP-T21P is an entry-level IP desktop phone supporting 2 VoIP accounts with advanced features such as HD audio and a large 5-line LCD display.

The SIP-T21 supports IP, Open VPN and a redundancy server, plus SRTP, HTTPS. Dual 10/100 Mbps Ethernet ports with built-in PoE are ideal for extended network use.

Extensive variety of features

It also provides a variety of features including a headset port, a phonebook for 1000 entries, SMS, 4 soft keys, 3-way conferencing, PoE and PnP ports, and compatibility with the leading IP-PBX and soft switch developments.

As this phone has PoE it does not come with a power supply.

Need A Headset with This Phone? Need a Power Supply with this phone?


  • 2 VoIP accounts, hotline, emergency call
  • Dual Ethernet ports/PoE
  • Call waiting, call transfer, call forward
  • Hold, mute, flash, auto-answer, redial
  • 3-way conference, DND, speed dial
  • Full duplex speakerphone
  • Phonebook for 1000 entries
  • Import/export, call history
  • Volume adjustment, ring tone selection
  • Tone scheme, System log
  • Multi-language (more than 20)
  • Dial plan, dial-now
  • Voicemail, MWI
  • Intercom, Paging
  • Call park, call pickup
  • Distinctive ringtone
  • 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
  • SIP v1 (RFC2543), v2 (RFC3261)
  • NAT Traversal: STUN mode
  • DTMF: In-Band, RFC2833, SIP Info
  • Configuration: browser/phone/auto-provision
  • Direct IP call without SIP proxy
  • Dial number via SIP server
  • Dial URL via SIP server
  • Admin/user configuration mode
  • TI TITAN chipset
  • 5-line LCD
  • 31 keys
  • 4 LEDs: 1xpower, 2xline, 1xmessage
  • 1xRJ9 handset port
  • 1xRJ9 headset port
  • Wall-mounted
  • Power consumption: 1.4-2.6W
  • Net weight: 0.81kg
  • Dimension: 209 x 188 x 41mm

In the box

  • Yealink SIP-T21P VoIP Phone
  • Phone stand 
  • Handset 
  • Handset cord 
  • Ethernet cable 
  • Quick installation guide


User Manual

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Yealink IP phones series [Explained]
What is DECT technology?
What is power over ethernet (poe)?

Product Specs.

More Information
Manufacturer part #SIP-T21P
Warranty1 year
Number of lines2
Function keysWith call key , With hands free kit, With mute key , With navigation key , With pause key , With R key, With redial key
Softkeys6 softkeys
Phonebook featuresBlack list - XML - DND
Expansion moduleNot compatible
Headset portWith headset port
Power sourcePoE powered
Type of displayBlack and white display
Call indicator LEDWith LED call indicator
Connectivity2 RJ45 ports
Wall mountingWith optional wall mounting

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