Điện thoại IP Yealink SIP-T57W

Audio Features

• HD voice: HD handset, HD speaker
• Hearing aid compatible (HAC) handset
• Acoustic Shield
• Smart Noise Filtering
• Audio codec: Opus, G.722, PCMA, PCMU, G.729, G.729A, G.726, G.723.1, 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

• 16 VoIP accounts
• One-touch speed dial, hotline
• Call forward, call waiting, call transfer
• Mute, DND, call hold, redial, call return, auto answer
• Group listening, SMS, emergency call
• 10-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 dual band Wi-Fi:

– Network standard: IEEE802.11a/b/g/n/ac

– Transmission rate: Up to 433Mbps (dynamic)

– Frequency range: 2.4GHz/5.0GHz

• Built-in Bluetooth for:

– Bluetooth headset,

– Mobile contacts synchronization

– Bluetooth call

– Simultaneous connection of one headset and one mobile phone

• USB port (2.0 compliant) for:

– Wired/wireless USB headset

– USB call recording through USB flash drive

– Color-screen expansion modules EXP50 (up to 3)

– Wireless Headset Adapter EHS40

• USB/Bluetooth connectivity to Yealink CP900/CP700

speakerphone, USB connectivity to Yealink UH36 headset:

– Basic functions: Answer / end, call mute

– Enhanced function: audio optimization, redial, call hold, volume synchronization, multiple calls control

• Content Sharing (via Yealink VCD)
• 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

Corded-Cordless Phone (via DECT Dongle DD10K)

• Up to 4 DECT cordless handsets
• Up to 4 concurrent calls
• Support Yealink W52H/W53H/W56H/DD Phone/CP930W
• Slave Handset for Master Deskset

IP-PBX Features

• Busy Lamp Field (BLF), Bridged Line Apperance (BLA)
• Anonymous call, anonymous call rejection
• Hot-desking, voice mail
• Flexible seating, Executive and Assistant
• Call park, call pickup
• Centralized call recording, call recording

Display and Indicator

• 7″ 800 x 480 capacitive adjustable touch screen
• 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, number and photo
• Screensaver
• Power saving

Feature keys

• 29 one-touch DSS keys
• 7 feature keys: hold, transfer, message, headset, mute, redial, speakerphone
• Volume control keys
• Illuminated mute/headset/hands-free speakerphone key Interface
• Dual-port Gigabit Ethernet
• Power over Ethernet (IEEE 802.3af)
• 1 x USB port (2.0 compliant)
• 1 x RJ9 (4P4C) handset port
• 1 x RJ9 (4P4C) headset port

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

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 (TLS1.2)
• HTTPS certificate manager
• AES encryption for configuration file
• Digest authentication using MD5/MD5-sess
• OpenVPN, IEEE802.1X
• IPv6, LLDP/CDP/DHCP VLAN, ICE

Other Physical Features

• Color: Classic Grey
• Wall mountable (optional)
• External Yealink AC adapter (optional):  AC 100~240V input and DC 5V/2A output
• USB output currency: 5V 500mA
• Power consumption (PSU): 3.2W-6.3W
• Power consumption (PoE): 4.0W-7.8W
• Dimension (W*D*H*T):  259.4mm*220mm*211mm*44.5mm
• Operating humidity: 10~95%
• Operating temperature: -10~50°C (+14~122°F)