Yealink T21P E2 SIP Telephone

Audio Features
> HD voice: HD handset, HD speaker
> Wideband codec: G.722
> Narrowband codec: G.711(A/?), 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
> 2 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
> Local 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
> Integrated Screenshots
> RTCP-XR

Directory
> Loal phonebook up to 1000 entries
> Black list
> XML/LDAP remote phonebook
> Intelligent search method
> 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
> Message Waiting Indicator (MWI)
> Voice mail, call park, call pickup
> Intercom, paging, music on hold, emergency call
> Call completion, call recording, hot-deskin

Display and Indicator
> 132×64-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
> 2 line keys with LED
> 6 features keys: message, headset, redial, tran,
mute, hands-free speakerphone
> 6 navigation keys
> Volume control keys

Interface
> 2xRJ45 10/100M Ethernet ports
>Power over Ethernet (IEEE 802.3af), class 2
> 1xRJ9 (4P4C) handset port
> 1xRJ9 (4P4C) headset port

Other Physical Features

> Wall mountable
> External universal AC adapter (optional)?
AC 100~240V input and DC 5V/600mA output
> Power consumption (PSU): 1.2-1.9W
> Power consumption (PoE): 1.8-2.3W
> Dimension(W*D*H*T):
209mm*188mm*150mm*41mm
> Operating humidity: 10~95%
> Operating temperature: -10~50?C

Package Features
> Qty/CTN: 10PCS
> N.W/CTN: 11.7kg
> G.W/CTN: 12.5kg
> Giftbox size: 215mm*200mm*118 mm
> Carton Meas: 615mm*436mm*208mm

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