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