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Yealink Network Technology Co., Ltd > 
Item#: N82E16833413008

Yealink SIP-T28P Executive IP Phone w/POE

  • 1xRJ9 (4P4C) handset port, 1xRJ9 (4P4C) headset port, 2xRJ45 10/100M Ethernet ports, 1xRJ12 (6P6C) expansion module port
  • Wired VoIP

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  • Overview
  • Specifications
  • Warranty & Returns
  • Reviews
Yealink Enterprise HD IP Phone - SIP-T28P

The Yealink SIP-T28P represents the next generation VoIP phone which designed for the business user who needs rich telephony features, friendly UI and super voice quality. Yealink HD technology enables rich, clear, life-like voice communications. By the large, high-resolution graphical display, and together with all the 48 keys, SIP-T28P offers an excellent user experience to configure, make calls, express XML browser, etc. Moreover, to avoid problems with unwanted violations of your audio data, Yealink SIP-T28P supports the security standards TLS, SRTP, HTTPS, 802.1x, Open VPN and AES encryption which are necessary to protect against electronic eavesdropping and data theft.

  • Yealink HD Voice
  • 320x160-pixel graphical LCD
  • Two-port 10/100 Ethernet Switch
  • PoE support
  • Up to 6 SIP accounts
  • Headset, EHS support
  • Supports expansion modules
  • Simple, flexible and secure provisioning options

Key Features and Benefits

HD Audio

Yealink HD Voice refers to the combination of software and hardware design as well as the implementation of wideband technology to maximizes the acoustic performance. Coupled with advanced acoustic clarity technology such as full duplex, echo cancellation, adaptive jitter buffer etc. Provide clearer, more lifelike voice communications.

A rich visual experience for applications

SIP-T26P Supports vast productivity-enhancing feature such as XML Browser, BLF, call forward, call transfer, 3-way conferencing, the 4 inch backlit display enables rich visual presentation and easier navigation of the menu, and together with all the 45 keys, SIP-T26P offers an excellent user experience to configure, make calls, etc.

Efficient Installation and Provisioning

Integrated IEEE 802.3af Power-over-Ethernet allows easy deployment with centralized powering and backup.The SIP-T26P support the FTP, TFTP, HTTP, and HTTPS protocols for file provisioning and are configured by default to use Trivial File Transfer Protocol (TFTP), supports AES encrypted XML configuration file.

Highly secure transport and interoperability

The communicator uses SIP over Transport Layer Security (TLS/SSL) to provide service providers the latest technology for enhanced network security. The range is certified compatible with 3CX, Asterisk and BroadSoft Broadworks, ensuring excellent compatibility with leading soft switch suppliers.


Audio Features

  • HD voice: HD handset, HD speaker
  • Codecs: G.722, G.711(A/µ), G.723.1, G.729AB, G.726, iLBC
  • DTMF: In-band, Out-of-band(RFC 2833) and SIP INFO
  • Full-duplex hands-free speakerphone with AEC

Phone features

  • 6 VoIP accounts
  • Call hold, mute, DND
  • One-touch speed dial, hotline
  • Call forward, call waiting, call transfer
  • Group listening, SMS
  • Redial, call return, auto answer
  • Local 3-way conferencing
  • Direct IP call without SIP proxy
  • Ring tone selection/import/delete
  • Set date time manually or automatically
  • Dial plan
  • XML Browser
  • Action URL/URI
  • RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035)


  • Loal phonebook up to 1000 entries
  • Black list
  • XML/LDAP remote phonebook
  • Intelligent search method
  • Phonebook search/import/export
  • Call history: dialed/received/missed/forwarded

IP-PBX Features

  • Busy Lamp Field (BLF)
  • Bridged Line Apperance(BLA)
  • Anonymous call, anonymous call rejection
  • Hot-desking, emergency call
  • Message Waiting Indicator (MWI)
  • Voice mail
  • Call park, call pickup
  • Intercom, paging
  • Music on hold
  • Call completion
  • Call recording

Display and Indicator

  • 320x160-pixel graphical LCD with backlight
  • LED for call and message waiting indication
  • Dual-color (red or green) illuminated LEDs for line status information
  • Intuitive user interface with icons and soft keys
  • National language selection
  • Caller ID with name, number

Feature keys

  • 48 keys including 16 freely programmable keys
  • 8 features keys: message, headset, hold, mute, tran, redial, conf, hands-free speakerphone
  • 4 context-sensitive “soft” keys
  • 6 navigation keys
  • Volume control keys


  • 2xRJ45 10/100M Ethernet ports
  • Power over Ethernet (IEEE 802.3af), class 2
  • 1xRJ9 (4P4C) handset port
  • 1xRJ9 (4P4C) headset port
  • 1XRJ12 (6P6C) EXT port:
    Supports up to 6 Expansion Modules for an attendant console application

Other Physical Features

  • External universal AC adapter (optional): AC 100~240V input and DC 5V/1.2A output
  • Power consumption (PSU): 1.3-2.1W
  • Power consumption (PoE): 1.8-3.1W
  • Dimension(W*D*H*T): 273mm*200mm*158mm*58.5mm
  • Operating humidity: 10~95%
  • Operating temperature: -10~50°C


  • Configuration: browser/phone/auto-provision
  • Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy
  • Auto-provision with PnP
  • Zero-sp-touch, TR-069
  • Phone lock for personal privacy protection
  • Reset to factory, reboot
  • Package tracing export, system log

Network and Security

  • SIP v1 (RFC2543), v2 (RFC3261)
  • Call server redundancy supported
  • 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 synchronization using SNTP
  • QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS


  • SRTP for voice
  • Transport Layer Security (TLS)
  • HTTPS certificate manager
  • AES encryption for configuration file
  • Digest authentication using MD5/MD5-sess
  • OpenVPN, IEEE802.1X
  • IPv6

Learn more about the Yealink Network Technology Co., Ltd SIP-T28P




Wired VoIP


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
1xRJ9 (4P4C) handset port, 1xRJ9 (4P4C) headset port, 2xRJ45 10/100M Ethernet ports, 1xRJ12 (6P6C) expansion module port
320x160 graphic LCD with 4-level grayscales
Power adapter: AC 100~240V input and DC 5V/1.2A output


TI TITAN chipset and TI voice engine

6 VoIP accounts, Broadsoft /Avaya/Asterisk validated

HD Voice: HD Codec, HD Handset, HD Speaker

48 keys including 16 programmable keys

BLF/BLA, SMS, Voicemail, Intercom

Localized language, XML phonebook

FTP/TFTP/HTTP, PnP Auto-provision


PoE, Headset, 2xRJ45, Expansion module

Power over Ethernet (IEEE 802.3af)

Codecs and Voice Features:
Wideband codec: G.722
Narrowband codec: G.711, G.723.1, G.726, G.729AB
Full-duplex speakerphone with AEC
Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Customer Reviews of the Yealink Network Technology Co., Ltd SIP-T28P

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  • Victor M.
  • 7/31/2013 12:10:45 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsWorked like a charm

Pros: It just complaints

Cons: None

Did you find this review helpful? Yes No

  • F1 I.
  • 3/30/2012 1:53:00 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year

5 out of 5 eggsPower10

Pros: Extremely customizable, very quick provisioning, super clear audio. Speakerphone and handset is very clear and loud.

solid build quality.

QoS and port priority are available for networks without VLAN capabilities.

Cons: No gigabit on the lan ports, the color LCD model does.

Other Thoughts: for a grayscale screen, its very clear.

Ability to customize the graphic with your own, same goes for ringtones. Have to go onto the yealink forums to get the windows app to convert graphics do it though. Audio can be done on Win XP and sound recorder program or any other program that can convert to WAV.

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Item#: N82E16833413008
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