Phone Features

• 6 VoIP accounts, Hotline, Emergency call
• Call hold, Call waiting, Call forward, Call return
• Call transfer (blind/semi-attended/attended)
• Caller ID display, Redial, Mute, DND
• Auto-answer, 3-way conferencing
• Speed dial, SMS, Voicemail
• Message Waiting Indication (MWI) LED
• Tone scheme, Volume control
• Direct IP call without SIP proxy
• Ring tone selection/import/delete
• Phonebook (300 entries), Black list
• Call history: dialed/received/missed/forwarded
• Menu-driven user interface
• Localized language and input method
• Soft keys programmable
• Supports up to 6 expansion modules(EXP38 and EXP39)
• Supports Wireless Headset Adapter (EHS36)

Advanced Features

• XML phonebook search/import
• LDAP phonebook
• XML Browser, Hot-desking
• PUSH XML
• Action URL & Active URI

IP PBX System Integration

• Busy lamp field (BLF), BLF list
• Bridged line appearance (BLA)
• DND & Forward synchronization
• Intercom, Paging, Music on hold
• Call park, Call pickup
• Call recording, Call completion
• Group listening, Group pickup
• Anonymous call, Anonymous call rejection
• Network conference
• Distinctive ringtone
• Dial Plan, Dial-now

Codecs and Voice Features

• Wideband codec: G.722
• Narrowband codec: G.711µ/A, G.723.1
• G.726, G.729AB
• VAD, CNG, AEC, PLC, AJB, AGC
• Full-duplex speakerphone with AEC

Network Features

• SIP v1 (RFC2543), v2 (RFC3261)
• IPV6
• DNS SRV (RFC3263)
• Redundant server support
• 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 for PC port
• TFTP/DHCP/PPPoE client
• Telnet/HTTP/HTTPS server
• DNS client, NAT/DHCP server
• Logout

Management

• Auto-provision via FTP/TFTP/HTTP/HTTPS
• Auto-provision with PnP
• SNMP V1/2 optional, TR069 optional
• Configuration: browser/phone/auto-provision
• Factory configuration customized
• Trace package and system log export

Security

• Open VPN, 802.1x, VLAN QoS (802.1pq), LLDP
• Transport Layer Security (TLS)
• HTTPS (server/client), SRTP (RFC3711)
• Digest authentication using MD5/MD5-sess
• Secure configuration file via AES encryption
• Phone lock for personal privacy protection
• Admin/VAR/User 3-level configuration mode

Connectivity

Physical Features

• TI TITAN chipset
• 320 x 160 graphic LCD with 4-level grayscales
• 48 keys including 16 programmable keys
• 1 x RJ9 (4P4C) handset port
• 1 x RJ9 (4P4C) headset port
• 2 x RJ45 10/100M Ethernet ports
• 1 x RJ12 (6P6C) EXT port
• Power adapter: AC 100~240V input and DC 5V/1.2A output (Optional)
• Power over Ethernet (IEEE 802.3af)
• Power consumption: 1.6-2.6W
• Net weight: 1.05KG
• Dimension: 273 x 204 x 42mm
• Operating humidity: 10~95%
• Storage temperature: up to 60°C

Yealink T28P Certifications