Yealink SIP-T28 is an executive IP phone designed for power users in office environment. It is especially designed for maximum productivity and efficiency in every-day business environment.

Using TI chipset and Voice Engine SIP-T28 offers unrivalled superb HD Voice Quality, innovative functional richness, friendly user interface, stylish and elegant design.

It is definitely able to provide a pleasant and satisfactory end-user experience.

6 Lines

It supports up to 6 SIP accounts, each with a standalone configuration.

HD Voice Quality

It supports advanced wideband voice codec G.722 and full-duplex hands-free speakerphone with enhanced AEC, delivering superior voice clarity.

Executive Level Phone

Equiped with 16 programmable function keys with LED, 4 soft keys, and supported BLF, XML Phonebook features, which increase working efficiency.

Network Features

SIP v1(RFC2543), v2(RFC3261)

NAT transverse: STUN mode

IP Assignment: Static/DHCP/PPPoE

In-Band DTMF, Out-of-Band DTMF, SIP Info

Proxy mode and Peer-to-peer SIP link mode

TFTP/DHCP/PPPoE client

Telnet/HTTP server

DNS client

NAT/DHCP server

Support VLAN, QoS

Voice Features

Wideband Codec: G.722, voice spectrum between 50-7000Hz

Narrowband Codecs: G.711, G.726, G.723.1/iLBC, G.729AB and GSM

VAD, CNG, AEC, PLC, AJB, AGC

Full-duplex hands-free speakerphone-compliant with IEEE 1329

support Hearing Aid Compatible (HAC)

Security

Secure RTP

Digest authentication using MD5/MD5-sess

Secure configuration file via AES encryption

Telephony Features

Call Hold, Call Waiting, Call Transfer, Call Forward

Caller ID, Call List, DND, Redial, Flash

3-way Conference, Speed Dial

Personal Ring Tone, Voicemail

Volume Adjustment, Mute, Speakerphone

Logo Customization, Black List, Phone Lock

Admin/User Configuration Mode

Contact List Export/Import

System Log Export/Import

Hotline, Signal Tone Settable

Multi-language

IP PBX System Integration

SMS, BLF/BLA, Paging, Intercom

Downloadable enterprise phonebook

Call Park, Call Pickup, Distinctive Ringtone

Auto-answer, Dial Plan, Dial-now

Config, Upgrade and Usage

Firmware Upgrade: TFTP/Console/Autoprovision

Auto-provision: TR069 Optional

Direct IP call without SIP proxy

Dial number via SIP serverDial URL via SIP server

Physical Features

TI Titan Chipset

LCD: White backlit 320x160

4-level grayscales

16 DSS Keys, 4 soft keys

Network Interface: 2xRJ45 10/100M ports

Headset port: RJ9

Expension Module Port

Speaker: 8 Ohm/1 Watt

Dimension: 310 x 290 x 110 mm

Weight: 1.6 kg

Power adapter: Input: AC 100~240V

Output: DC 5V/1A

Operating humidity: 10~95%

Storage temperature: up to 60°c