Yealink SIP-T22 VoIP Phone
3 Lines
2 Ethernet Ports
HD Voice, Codec, Handset, and Speaker
Protocol: SIP
Power Supply Included (PoE not supported)
Product Desion

Yealink SIP-T22 features intuitive user interface and enhanced functionality which make it easy for
 people to interact and maximize productivity. With TI TITAN chipset and TI leading VoIP voice engine, it enables enhanced
high-definition audio, outsourced management options, flexible deployment and third-party communications applications.
As a cost effective IP solution, it helps users to streamline business processes, delivering a powerful and consistent
communications experience for small and large offices environment.

Product Features
  - 3 VoIP accounts, hotline, emergency call
 - Call waiting, call transfer, call forward
 - Hold, mute, flash, auto-answer, redial
 - 3-way conference, DND, speed dial
 - Phonebook (each record with 3 phone numbers, 300 entries), black list
 - XML Phonebook search/import/export
 - Lists of missed, received, dialed and forwarded calls (100 entries in all)
 - Volume adjustment, ring tone selection
 - Tone scheme, System log
 - Multi-language (more than 20)s

IP PBX System Integration

 - Dial plan, dial-now
 - SMS, Voicemail, MWI
 - Intercom
 - Call park, call pickup
 - Distinctive ringtone

Codecs and Voice Features

 - Wideband codec: G.722
 - Narrowband codec: G.711, G.723.1, G.726, G.729AB
 - VAD, CNG, AEC, PLC, AJB, AGC
 - Full-duplex speakerphone with AEC

Network Features
  - SIP v1 (RFC2543), v2 (RFC3261)
 - NAT Traversal: STUN mode
 - DTMF: In-Band, RFC2833, SIP Info
 - Proxy mode and peer-to-peer SIP link mode
 - IP Assignment: Static/DHCP/PPPoE
 - Bridge/router mode
 - TFTP/DHCP/PPPoE client
 - Telnet/HTTP/HTTPS server
 - DNS client
 - NAT/DHCP server

Management

 - FTP/TFTP/HTTP/PnP auto-provision
 - Configuration: browser/phone/auto-provision
 - Direct IP call without SIP proxy
 - Dial number via SIP server
 - Dial URL via SIP server

Security
  - HTTPS (server/client)
 - SRTP (RFC3711)
 - Transport Layer Security (TLS)
 - VLAN (802.1 pq), QoS
 - Digest authentication using MD5/MD5-sess
 - Secure configuration file via AES encryption
 - Phone lock for personal privacy protection
 - Admin/user configuration mode