The Yealink SIP-T21P (2 VoIP Accounts w/ PoE & HD Voice) is an entry level IP phone designed for an enhanced user experience with a generously large 5-line LCD display.
  • The Yealink SIP-T21P redefines the entry-level IP phone, with impressive features, HD Voice, and high performance.
  • The generously large 132 x 64-pixel graphical LCD shows a clear 5-line display. Your customers will have a smoother user experience since there is much more visual information accessible at a glance compared to other entry-level IP phones.
  • Dual 10/100 Mbps network ports with support for IPv6 and integrated PoE are ideal for efficient use of network cabling.
  • The SIP-T21P supports two VoIP account.
  • Choose from simple, flexible, and secure auto provisioning options from AES encrypted configuration files via FTP, TFTP, HTTP, and HTTPS for mass deployments.
  • Ensure the security and quality of your VoIP calls on the Yealink SIP-T21 with SRTP, HTTPS, TLS, VLAN support, and QoS parameters.
  • The Yealink SIP-T21 is wall-mountable and supports headset use.



This particular addition to the SIP-T2 series has dual 10/100 network ports and supports IPv6, Open VPN and a redundancy server, and also operates with SRTP/ HTTPS/ TLS, 802.1x. for extended network use. The integrated PoE allows for easy, flexible and secure installation. The T21P is designed for business environments with headset compatibility and wall mountable.


YEALINK T21P Features and Functions

  • 2 Line Appearances
  • Dual-port 10/100 Ethernet
  • Yealink Optima HD Voice Supported
  • Up to 2 SIP accounts
  • Full-duplex hands-free speakerphone
  • No expansion modules supported
  • RJ9 Headset Port
  • 132×64-pixel graphical LCD display
  • Wall mountable

YEALINK T21P Specification

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
  • Call history: dialed/received/missed/forwarded
  • Local 3-way conferencing
  • Direct IP call without SIP proxy
  • Ring tone selection/import/delete
  • Keypad lock, emergency call
  • Set time & date manually or automatically
  • Dial Plan, XML Browser, action URL & action UR
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
  • Local phonebook up to 1000 entries
  • Black list
  • XML/LDAP remote phonebook
  • Intelligent search method
  • Phonebook search/import/export
PBX Integration Features
  • Anonymous call, anonymous call rejection
  • Message waiting indicator (MWI)
  • Voice mail, call park, call pickup
  • Intercom, paging, music on hold
  • Call completion, call recording, hot-desking
Display and Indicator
  • 132×64-pixel graphical LCD
  • LED for call and message waiting indication
  • Intuitive user interface with icons and soft keys
  • National language selection
  • Caller ID with name, number
Physical Features
  • 2xRJ45 10/100M Ethernet ports
  • 31 keys including 4 soft keys
  • 4 LEDs: 1 power, 2 line, 1 message
  • 1 RJ9 handset port
  • 1 RJ9 headset port
  • Wall mountable
  • Power adapter: AC 100~240V input and DC 5V/600mA Output
  • Power over Ethernet (IEEE 802.3af)
  • Power consumption: 1.24-2.62W
  • Dimensions: 209mm*188mm*150mm*41mm
  • Operating humidity: 10~95%
  • Operating temperature: -10~50°C
  • Configuration: browser/phone/auto-provision
  • Auto provision via FTP/TFTP/HTTP/HTTPS for mass deployments
  • Auto-provision with PnP
  • Zero-sp-touch
  • Provisioning server redundancy supported
  • Reset to factory, reboot
  • Package tracing export, system log
Network and Security
  • SIP v1 (RFC2543), v2 (RFC3261 )
  • IPv6
  • NAT transverse: STUN mode
  • Proxy mode and peer-to-peer SIP link mode
  • IP assignment: static/DHCP /PPPoE
  • HTTP/HTTPS web server
  • Time and date synchro nization using SNTP
  • QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS, DSCP
  • SRTP for voice
  • Transport Layer Security (TLS)
  • HTTPS certificate manager
  • AES encryption for configuration file
  • Digest authentication using MD5/MD5-sess
  • IEEE802.1X
Package Features
  • Qty/CTN: 10 PCS
  • N.W/CTN:
  • G.W/CTN:
  • Giftbox size: 215MM*200MM*118MM
  • Carton Meas: 615mm*436mm*208mm