Yealink T21P-E2 IP Phone

• Support up to 2 VoIP accounts
• Call hold, mute, DND Support
• Call waiting, call forward, call transfer
• Group listening, SMS, emergency call
• One-touch speed dial, hotline
• Local 3-way conferencing
• Direct IP call without SIP proxy
• Redial, call return, auto answer
• Ringtone selection/import/delete
• Set date time manually or automatically
• Integrated Screenshots
• Dial plan
• XML Browser, action URL/URI
• RTCP-XR

IP-PBX Features

• Busy Lamp Field (BLF)
• Anonymous call, anonymous call rejection
• Message Waiting Indicator (MWI)
• Bridged Line Appearance(BLA)
• Voice mail, call park, call pickup
• Call completion, call recording, hot-desking
• Intercom, paging, music on hold, emergency call

Display and Indicator

• LED for call and message waiting indication
• National language selection
• Dual-color (red or green) illuminated LEDs for line status information
• 132×64-pixel graphical LCD with backlight
• Intuitive user interface with icons and soft keys
• Caller ID with name, number

Feature keys

• 2 line keys with LED
• Volume control keys
• 6 navigation keys
• 6 feature keys: message, headset, redial, transfer, mute, hands-free speakerphone

Interface

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

Network and Security

• SIP v1 (RFC2543), v2 (RFC3261)
• IPv6
• Proxy mode and peer-to-peer SIP link mode
• NAT transverse: STUN mode
• IP assignment: static/DHCP
• Time and date synchronization using SNTP
• HTTP/HTTPS web server
• UDP/TCP/DNS-SRV(RFC 3263)
• SRTP for voice
• Transport Layer Security (TLS)
• QoS: 802.1p/Q tagging (VLAN), Layer 3 ToS DSCP
• HTTPS certificate manager
• Digest authentication using MD5/MD5-sess
• AES encryption for configuration file
• OpenVPN, IEEE802.1X