Product Description
Yealink T21P Entry Level 2SIP VoIP Phone
Specification
Audio Features
HD voice: HD handset, HD speaker
Wideband codec: G.722
Narrowband codec: G.711(A/μ),G.729AB, G.726
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
3 VoIP accounts
One-touch speed dial, redial
Call forward, call waiting
Call transfer, call hold
Call return, group listening, SMS
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)
Directory
Local 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 Appearance(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
2.3″ 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
3 line keys with LED
5 features keys: message, headset, mute, redial, hands-free speakerphone
4 context-sensitive “soft” keys
6 navigation keys
2 volume control keys
Mute key
Headset key
Hands-free speakerphone key
Interface
2xRJ45 10/100M Ethernet ports
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/600mA output
Power consumption (PSU): 1.05-3.23W
Power consumption (PoE): 1.7-3.2W
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: 5.7 kg
G.W/CTN: 6.4 kg
Giftbox size: 246mm*223mm*120mm
Carton Meas: 620mm*256mm*233mm
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 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