Yealink SIP-T27PN Telephone

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The Yealink SIP-T27PN is a highly featured sip phone designed to deliver superb sound quality and uses standard encryption protocols to deliver secure remote provisioning. Offering a rich user experience and boasting a wide range of functionality, including SCA, BLF, 3-way conference and paperless labels, this Optima HD SIP phone is headset compatible and can be expanded using the EXP39B module.

Audio Features

• HD voice: HD handset, HD speaker
• Wideband codec: G.722
• Narrowband codec: G.711(A/μ, G.723.1,
• G.729AB, G.726, GSM, 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

• 6 VoIP accounts
• One-touch speed dial, redial
• Call forward, call waiting
• Call transfer, call hold
• Call return, group listening
• 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

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 Apperance(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

• 3.66” 240x120-pixel graphical LCD with
• backlight
• LED for call and message waiting
• indication
• Dual-colour (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

• 8 line keys with LED
• 8 line keys can be programmed up to
• 21 various features (3-page view)
• 5 features keys: message, headset, mute,
• redial, hands-free speakerphone
• 4 context-sensitive “soft” keys
• 6 navigation keys
• 2 volume control keys
• Illuminated mute key
• Illuminated headset key
• Illuminated hands-free speakerphone
• key

Interface

• 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 (optional)
• External universal AC adapter (optional)
• AC 100~240V input and DC 5V/1.2A output
• Power consumption (PSU): 1.17~3.32W
• Power consumption (PoE): 1.60~5.94W
• Dimension(W*D*H*T): 265mm x 210mm
• x 170.5mm x 53.5mm
• Operating humidity: 10-95%
• Operating temperature: -10~50°C

Management

• Configuration: browser/phone/autoprovision
• Auto provision via FTP/TFTP/HTTP/
• HTTPS for mass deploy
• Auto-provision with PnP
• Zero-sp-touch
• Reset to factory, reboot
• Package tracing export, system log
• Network and Security
• SIP v1 (RFC2543), v2 (RFC3261)
• NAT traverse: 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