Yealink T48S Skype For Business Edition User Manual page 209

Ask the Yealink FAE or reseller for the BToE Connector application, or download it online:
http://support.yealink.com/documentFront/forwardToDocumentFrontDisplayPage
To install the Yealink BToE Connector on your PC:
Unzip the downloaded file.
1.
Double click the installation application Yealink BToE Connector for Lync.msi.
2.
Click Next to continue.
3.
Advanced Phone Features
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