Yealink SIP-T42G

Video：

Audio Features
> HD voice: HD handset, HD speaker
> Wideband codec: G.722
> Narrowband codec: G.711(A/μ), G.723.1, G.729AB
, G.726, GSM, 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
> Mute, auto answer, DND
> 3-way conference call
> Direct IP call without SIP proxy
> Ring tone selection/import/delete
> Hotline, emergency call
> Set date time manually or automatically
> Dial plan
>XML Browser, 
>Action URL/URI
> RTCP-XR （RFC3611）,VQ-RTCPXR（RFC6035）

IP-PBX Features
> Busy Lamp Field (BLF)
> Bridged Line Apperance(BLA)
> Anonymous call, anonymous call rejection
> Hot-desking
> Message Waiting Indicator (MWI)
> Voice mail
> Call park, call pickup
> Intercom, paging, 
> Music on hold
> Call recording

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
> National language selection
> Caller ID with name, number

Feature keys
> 6 line keys with LED
> 6 line keys can be programmed up to 15
various features (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
> 1xRJ9 (4P4C) handset port
> 1xRJ9 (4P4C) headset port 
> 1XRJ12 (6P6C) EHS port
>Power over Ethernet (IEEE 802.3af), Class 2

Other Physical Features

> Stand with 2 adjustable angles 
> Wall mountable
> External universal AC adapter (optional)：
AC 100~240V input and DC 5V/1.2A output
> Power consumption (PSU): 1.4-3.9W
> Power consumption (PoE): 2.1-5.9W
> Dimension(W*D*H*T):
212mm*189mm*175mm*54mm
> Operating humidity: 10~95%
> Operating temperature: -10~50°C

Package Features
> Qty/CTN: 5 PCS
> N.W/CTN: 6.9 kg
> G.W/CTN: 7.6 kg
> Giftbox size: 241mm*236mm*138mm
> Carton Meas: 707mm*253mm*244mm

Management
> Configuration: browser/phone/auto-provision
> Auto provision via FTP/TFTP/HTTP/HTTPS
for mass deploy
> Auto-provision with PnP
> Zero-sp-touch, TR-069
> Reset to factory, reboot
> Package tracing export, system log

Network and Security
> SIP v1 (RFC2543), v2 (RFC3261)
> NAT transverse: 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)
> HTTPS certificate manager
> AES encryption for configuration file
> Digest authentication using MD5/MD5-sess
> OpenVPN, IEEE802.1X
> IPv6