Danh mục

Model	SIP-T44U
Audio Features	• HD voice: HD handset, HD speaker • Hearing aid compatible (HAC) handset • Acoustic Shield • Smart Noise Filtering • Wideband codec: AMR-WB (optional), G.722 • Narrowband codec: AMR-NB (optional), PCMU (G.711μ), PCMA (G.711A), G.723.1, G.729, G.729A, G.729B, 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	• 12 VoIP accounts • One-touch speed dial, redial • Call forward, call waiting, call transfer, call hold • Call return, group listening • Emergency call • Mute, DND • Auto answer • Hoteline • 5-way conference call • 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) • Dual USB ports (2.0 compliant) • Enhanced DSS key
Directory	• Local phonebook up to 1000 entries • Blocklist • 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, Executive and Assistant • Call park, call pickup • Centralized call recording, call recording • Visual voice mail
Display and Indicator	• 2.8” 320x240-pixel color 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 • Multilingual user interface • Caller ID with name and number • Power saving
Feature keys	• 8 line keys with LED • 8 line keys can be programmed up to 21 paperless DSS keys (3-page view) • 5 features keys: message, headset, mute, redial, hands-free speakerphone • 4 context-sensitive “soft” keys • 6 navigation keys • 2 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 • 2 x USB port (2.0 compliant) • 1 x RJ9 (4P4C) handset port • 1 x RJ9 (4P4C) headset port
Other Physical Features	• Color: Classic Grey • Stand with 2 adjustable angles • Wall mountable • External Yealink AC adapter (optional): AC 100-240 V input and DC 5 V/1.2 A output • USB output currency: 5 V 500 mA • Power consumption (PSU): 1.7W - 4.1W • Power consumption (PoE): 2.0W - 4.9W • Dimension (WDH*T): 224.9 × 206.2 × 174.9 × 52 mm • Operating humidity: 5% to 90%, noncondensing • Operating temperature: -10 to +45°C (+14 to 113°F) • Storage temperature: -30 to +70°C (-22 to +158°F)
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 • 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 1.3) • HTTPS certificate manager • AES encryption for configuration file (AES256) • Digest authentication: MD5/SHA1/SHA224/-SHA256/SHA384/SHA512 • OpenVPN, IEEE802.1X, L2TP VPN • IPv6 • LLDP/CDP/DHCP VLAN • ICE • WPA2/WPA3 • Secure boot • GARP (Generic Attribute Registration Protocol)