Yealink T27P Administrator's Guide

Administrator’s Guide for SIP-T2_Series_T4_Series IP Phones
xii
LLDP ............................................................................................................................................... 407
CDP ............................................................................................................................................... 411
VLAN ............................................................................................................................................. 413
VPN ................................................................................................................................................ 421
Voice Quality Monitoring ............................................................................................................ 424
RTCP-XR .................................................................................................................................. 424
VQ-RTCPXR ............................................................................................................................ 425
Quality of Service ........................................................................................................................ 442
Network Address Translation ..................................................................................................... 445
802.1X Authentication ................................................................................................................. 449
TR-069 Device Management ...................................................................................................... 458
IPv6 Support ................................................................................................................................. 464
Configuring Audio Features ..................................................473
Headset Prior ............................................................................................................................... 473
Dual Headset ............................................................................................................................... 474
Audio Codecs .............................................................................................................................. 476
Acoustic Clarity Technology ........................................................................................................ 485
Acoustic Echo Cancellation ................................................................................................. 485
Background Noise Suppression .......................................................................................... 487
Automatic Gain Control ....................................................................................................... 487
Voice Activity Detection ....................................................................................................... 487
Comfort Noise Generation .................................................................................................. 488
Jitter Buffer ............................................................................................................................ 490
Configuring Security Features ...............................................493
Transport Layer Security .............................................................................................................. 493
Secure Real-Time Transport Protocol .......................................................................................... 502
Encrypting Configuration Files ................................................................................................... 505
Resource Files ........................................................................511
Replace Rule Template ............................................................................................................... 512
Dial-now Template ....................................................................................................................... 513
Softkey Layout Template ............................................................................................................. 514
Directory Template ...................................................................................................................... 515
Super Search Template ............................................................................................................... 516
Local Contact File ........................................................................................................................ 518
Remote XML Phone Book ............................................................................................................ 520
Troubleshooting .....................................................................523
Troubleshooting Methods ........................................................................................................... 523

Yealink T27P Specifications

General

Wall Mountable	Yes
Local Phonebook	1000 entries
Bluetooth	No
Wi-Fi	No
Gigabit Ethernet	No
Display	3.66" 240x120 pixel graphical LCD with backlight
Audio Features	HD voice, Full-duplex speakerphone
Network	Dual-port 10/100 Ethernet switch
Protocols	SIP v1 (RFC2543), v2 (RFC3261)
Power	IEEE 802.3af PoE
Connectivity	2 x RJ45 10/100M Ethernet ports
Voice Codecs	G.711(A/μ), G.722, G.723, G.729AB, G.726
EHS	Supports EHS with Plantronics headsets
Headset Port	Yes
Power Adapter	5V DC (optional)