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Audio Features
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HD voice: HD handset, HD speaker
Hearing aid compatible (HAC) handset
Audio codec: Opus, G.722, G.711 (A/µ), G.723, G.723.1, G.726, G.729AB, 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
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Phone Features
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12 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
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Directory
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Local phonebook up to 1000 entries
Black list
XML/LDAP remote phonebook
Smart dialing
Phonebook search/import/export
Call history: dialed/received/missed/forwarded
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IP-PBX Features
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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
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Display and Indicator
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2.8" 320 x 240-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
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Key Features
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8 line keys with LED
8 line keys can be programmed up to 21 various features (3-page view)
5 features keys: mute, headset, message, 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
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Interface
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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
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Management
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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
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Network and Security
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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
IPv6, LLDP/CDP/DHCP VLAN, ICE
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Other Physical Features
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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-3.4W
Power consumption (PoE): 2.1W-4.0W
Dimension (W*D*H*T): 211.6*212.0*166.8*42.6 mm
Operating humidity: 10~95%
Operating temperature: -10~40°C (+14~104°F)
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Package Features
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Yealink SIP-T52S IP phone
Handset with handset cord
Ethernet Cable
Stand
Quick Start Guide
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