Yealink T48S Skype For Business Edition User Manual page 151

The value ranges from 1 to 15 minutes, the default value is 5 minutes.
Tap to accept the change.
4.
Joining Skype Conferences from the Calendar
You can join the Skype conferences from calendar in following three ways:
Joining a Skype conference from a conference reminder (Once joined, presenter and

attendee will be muted automatically, organizer will not be muted).
Joining a Skype conference from Schedule view (Once joined, presenter and attendee

will be muted automatically, organizer will not be muted).
Dialing the conference dial-in number to join a Skype conference (Once joined,

presenter, attendee and organizer will not be muted).
Note
When the organizer sets up a conference in Outlook and enables Mute all attendees feature,
all conference participants will be muted automatically once joining the Skype conferences in
above ways.
Basic Call Features
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