Phone Features
• 16 VoIP accounts
• Call hold, mute, DND
• One-touch speed dial, hotline
• Call forward, call waiting, call transfer
• Group listening, SMS, emergency call
• Redial, call return, auto answer
• 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)
• Built-in Bluetooth for:
  Bluetooth headset,
  Mobile contacts synchronization
• USB port (2.0 compliant) for:
  wired/wireless USB headset
  Wi-Fi through WF40,
   USB call recording through USB flash drive
• Enhanced DSS key

Directory
• Local phonebook up to 1000 entries
• Black list
• XML/LDAP remote phonebook
• Smart dialing
• 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, voice mail
• Flexible seating
• Call park, call pickup
• Executive and Assistant
• Centralized call recording
• Call recording

Display and Indicator
• 4.3" 480 x 272-pixel color display with backlight
• 16 bit depth color
• LED for call and message waiting indication
• Dual-color (red or green) illuminated LEDs for line status information
• Wallpaper
• Intuitive user interface with icons and soft keys
• Multilingual user interface
• Caller ID with name and number
• Screensaver
• Power saving

Feature keys
• 10 line keys with LED
• 10 line keys can be programmed up to 27 various features (3-page view)
• 7 features keys: message, headset, hold, mute, transfer,redial, hands-free speakerphone
• 4 context-sensitive “soft” keys
• 6 navigation keys
• Volume control keys
• Illuminated mute key
• Illuminated headset key
• Illuminated hands-free speakerphone key Interface
• Dual-port Gigabit Ethernet
• Power over Ethernet (IEEE 802.3af), class 3
• 1 x USB port (2.0 compliant)
• 1 x RJ9 (4P4C) handset port
• 1 x RJ9 (4P4C) headset port
• Supports up to 3 color-screen expansion modules

Management
• Configuration: browser/phone/auto-provision
• Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy
• Auto-provision with PnP
• Broadsoft device management
• Zero-sp-touch, TR-069
• Phone lock for personal privacy protection
• Reset to factory, reboot
• Package tracing export, system log
• T54S&T52S unified firmware and Auto-P template

Network and Security
• SIP v1 (RFC2543), v2 (RFC3261)
• Call server redundancy supported
• NAT traversal: 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
• Pv6, LLDP/CDP/DHCP VLAN, ICE

Other Physical Features
> Stand with 2 adjustable angles
• Wall mountable (optional)
• External Yealink AC adapter (optional):
AC 100~240V input and DC 5V/2A output
• Power consumption (PSU): 1.9W-3.5W
• Power consumption (PoE): 2.1W-4.1W
• Dimension (W*D*H*T):
233mm*218.8mm*172.6mm*42.6mm
• Operating humidity: 10~95%
• Operating temperature: -10~40°C (+14~104°F)

Package Features
• Package content:
- Yealink SIP-T54S IP phone
- Handset with handset cord
- Ethernet Cable
- Stand
- Quick Start Guide
- Power Adapter (Optional)
• Qty/CTN: 5 PCS
• N.W/CTN: 7.1 kg
• G.W/CTN: 7.9 kg
• Giftbox size: 274 mm*265 mm*128 mm
• Carton Meas: 660 mm*275 mm*290 mm