Yealink SIP-T48G Administrator's Manual page 12

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
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
xii