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, 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
Display and Indicator
> 2.7" 192x64-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
> Multilingual user interface
> Caller ID with name and number
> Power saving
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 the date and time manually or automatically
> Dial Plan
> XML Browser, Action URL/URI
> RTCP-XR (RFC3611), VQ-RTCPXR (RFC6035)
> Dual USB ports (2.0 compliant)
- Bluetooth headset through BT40/BT41/BT51 Support Yealink Bluetooth headset BH71/BH71 Workstation/BH71 Workstation Pro/BH72/BH76/UH38 through BT51
- DECT wireless headset (Yealink WH62 Portable/WH63 Portable)
- Contact synchronization through BT40/BT41/BT51
- Simultaneous connection of one headset and one mobile phone through BT40/BT41/BT51
- Wi-Fi through WF40/WF50
- USB call recording through a USB flash drive
- USB headset
- Wireless Headset Adapter EHS40
> USB/Bluetooth connectivity to Yealink CP900/CP700 speakerphone/wireless headset UH38, USB connectivity to Yealink wired headset UH34/UH36/UH37:
- Basic functions: Answer/end, call mute
- Enhanced function: audio optimization, redial, call hold, volume synchronization, multiple calls control
> Enhanced DSS key
IP-PBX Features
> Busy Lamp Field (BLF), Bridged Line Appearance (BLA)
> Anonymous call, anonymous call rejection
> Hot-desking, voice mail
> Flexible seating, Executive and Assistant
> Call park, call pickup
> Centralized call recording
> Visual voice mail
> Call recording
Directory
> Local phonebook up to 1000 entries
> Blocklist
> XML/LDAP remote phonebook
> Smart dialing
> Phonebook search/import/export
> Call history: dialed/received/missed/forwarded
Feature keys
> 6 line keys with LED
> 6 line keys can be programmed up to 15 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
> 2 x RJ45 10/100/1000M Ethernet ports
> Power over Ethernet (IEEE 802.3af), Class 2
> 2 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 deployment
> 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 DSC
> 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)
Other Physical Features
> Colour: 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): 0.9-2.2 W
> Power consumption (PoE): 1.3-2.9 W
> Dimension (W*D*H*T): 212 × 189 × 175 × 54 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)
Package Features
> Package content:
- Yealink SIP-T42U IP phone
- Handset with handset cord
- Ethernet Cable (2m CAT5E UTP Cable)
- Stand
- Quick Start Guide
- Power Adapter (Optional)
- Wall Mount Bracket (Optional)
> Qty/CTN: 5 PCS
> N.W/CTN: 5.8 kg
> G.W/CTN: 6.3 kg
> Giftbox size: 246 × 223 × 120 mm
> Carton Meas: 627 × 256 × 235 mm