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-resolutiongraphical 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
  • 320×160-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

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
  • VAD, CNG, AEC, PLC, AJB, AGC

 

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)

 

Directory

  • 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

  • 320×160-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

 

Interface

  • 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

 

Management

  • 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
  • UDP/TCP/DNS-SRV(RFC 3263)
  • QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP
  • 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

 

Package Features

  • Qty/CTN: 5 PCS
  • N.W/CTN: 6.9 KG
  • G.W/CTN: 7.6 KG
  • Giftbox size: 285mm * 240mm* 110mm
  • Carton Meas: 580mm*295mm*250mm

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