Yealink SIP-T21 - 2 linije, SIP

Yealink’s new SIP-T21 takes entry-level IP phones to a level never achieved before. Making full-use of high-quality materials, plus an extra-large 132 x 64-pixel graphical LCD showing a clear 5-line data display, it offers a smoother user experience, much more visual information at a glance, plus HD Voice characteristics. The T21 supports two VoIP account, simple, flexible and secure installation options, plus support for IPv6, Open VPN and a redundancy server. It also operates with SRTP/ HTTPS/ TLS, 802.1x. As a very cost-effective and powerful IP solution, the T21 maximizing productivity in both small and large office environments.

Features      

• HD Voice: HD Codec, HD speaker, HD handset
• 132 x 64-pixel graphical LCD
• 2 VoIP accounts
• Two-port 10/100 Ethernet Switch
• Headset, wall-mountable
• XML/LDAP remote phonebook

Specification      

Audio Features

• Full-duplex hands-free speakerphone with AEC
• Codecs: G.722 ( Wideband),  G.711(A/μ), G.723, G.729AB, G.726
• DTMF: In-band, Out-of-band(RFC 2833) and SIP INFO
• VAD, CNG, AEC, PLC, AJB, AGC

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

Phone Features
 

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

IP-PBX Features

• Anonymous call, anonymous call rejection
• Message waiting indicator (MWI)
• Voice mail, call park, call pickup
• Intercom, paging, music on hold
• Call completion, call recording, hot-desking

Display and Indicator

• 132x64-pixel graphical LCD
• LED for call and message waiting indication
• Intuitive user interface with icons and soft keys
• National language selection
• Caller ID with name, number

Network and Security

• SIP v1 (RFC2543), v2 (RFC3261)
• IPv6, open VPN
• NAT transverse: STUN mode
• Proxy mode and peer-to-peer SIP link mode
• IP assignment: static/DHCP/PPPoE
• 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
• IEEE802.1X

Management

• Configuration: browser/phone/auto-provision
• Auto provision via FTP/TFTP/HTTP/HTTPS for mass deploy
• Auto-provision with PnP
• Zero-sp-touch
• Provisioning server redundancy supported
• Reset to factory, reboot
• Package tracing export, system log

Physical Features

•  2xRJ45 10/100M Ethernet ports
•  31 keys including 4 soft keys
•  4 LEDs: 1xpower, 2xline, 1xmessage
•  1xRJ9 handset port
•  1xRJ9 headset port
•  Wall-mountable
•  Power adapter: AC 100~240V input and DC 5V/600mA Output
•  Power consumption: 1.4-2.6W
•  Net weight: 0.81kg
•  Dimension: 209mm*188mm*150mm*41mm
•  Operating humidity: 10~95%
•  Storage temperature: -10~50°C