Hardware

Yealink T28P Professional Business Class IP Phone

The Yealink SIP-T28P represents the next generation VoIP phone. Designed for the professional business user who needs rich telephony features, friendly UI and superb voice quality, it is equipped with the leading TI TITAN chipset, offers high definition voice quality through TI voice engine, HD handset, HD speaker and HD codec (G.722).

The large, high-resolution graphical display, together with all the 48 keys, offers an excellent user experience to configure and make calls. To avoid problems with unwanted violations of your audio data, Yealink SIP-T28P supports the security standards TLS, SRTP, HTTPS, and AES encryption which are necessary to protect against electronic eavesdropping and data theft.

Key features and functions of Yealink T28P

6 VoIP accounts, hotline, emergency call
Call waiting, call transfer, call forward
Hold, mute, flash, auto-answer, redial
3-way conference, DND, speed dial
XML Phonebook search/import/export
Black list, call history (100 entries)
Volume adjustment, ring tone selection
Tone scheme, System log
Multi-language (more than 20)
IP PBX System Integration
Dial plan, dial-now
SMS, Voicemail, MWI
BLF/BLA, 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 speakerphone with AEC
SIP v1 (RFC2543), v2 (RFC3261)
NAT Traversal: STUN mode
DTMF: In-Band, RFC2833, SIP Info
Proxy mode and peer-to-peer SIP link mode
IP Assignment: Static/DHCP/PPPoE
Bridge/router mode
TFTP/DHCP/PPPoE client

Telnet/HTTP/HTTPS server
DNS client
NAT/DHCP server
FTP/TFTP/HTTP/PnP auto-provision
Configuration: browser/phone/auto-provision
Direct IP call without SIP proxy
Dial number via SIP server
Dial URL via SIP server
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
TI TITAN chipset
320x160 graphic LCD with 4-level grayscales
48 keys including 16 programmable keys
1xRJ9 (4P4C) handset port
2xRJ45 10/100M Ethernet ports
1XRJ12 (6P6C) expansion module port
Power adapter: AC 100~240V input
and DC 5V/1.2A output
Power over Ethernet (IEEE 802.3af)
Power consumption: 1.6~2.6W