Yealink CP960 - Merging Multiple Calls into a Conference Call

Yealink CP960 User Guide
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l Tap , tap the desired contact to dial out.
l Tap , tap the desired history record to dial out.
l Tap Call multiple members? Click here >>.
Enter the number or select the contact, and then tap Add members to add multiple members.
Tap
to call all intended parties at the same time.
Merging Multiple Calls into a Conference Call
Procedure
1. Tap Merge calls.
The calls are merged into a conference call.