Phoenix Audio Duet Executive MT202-EXE - Manual (Page 8)

HOW TO BRIDGE CALLS
When the Duet Executive is connected to both your computer and your telephone, you can
bridge the two connections which will allow you and both parties to communicate freely
with each other.
This feature is very convenient if you are on a VoIP call and want to patch-in a person that
has no access to a computer. Simply call him / her using your telephone while keeping the
VoIP call active.