Yealink VC110 - Changes for Release 21, Guide Version 21.20; Changes for Release 21, Guide Version 21.15

About This Guide
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Major updates have occurred to the following sections:
 Icon Instructions on page 33
 Configuring Video Conference Platform on page 107
 DTMF on page 144
 Dual-Stream Protocol on page 200
 Camera Control Protocol on page 215
 Secure Real-Time Transport Protocol on page 261
Changes for Release 21, Guide Version 21.20
The following sections are new for this version:
 Keyboard Input Method on page 192
 Configuring Video Conference Platform on page 107
Major updates have occurred to the following sections:
 Icon Instructions on page 33
 Setup Wizard on page 49
 Directory on page 231
Changes for Release 21, Guide Version 21.15
The following section is new for this edition:
 IPv6 Support on page 64
 Video Codecs on page 152
 Hiding Icons in a Call on page 185
 Output Resolution on page 221
 Video Recording on page 223
 Screenshot on page 225
Major updates have occurred to the following sections:
 Icon Instructions on page 33
 Setup Wizard on page 49
 Configuring LAN Properties on page 56
 Call Protocol on page 153
 Dual-Stream Protocol on page 200
 Far-end Camera Control on page 214
 Search Source List in Dialing on page 242