Clipcomm BS-H100 - Manual (Page 13)

[Transferring a call to Bluetooth headset]
To transfer a call from the telephone to the headset while
talking on the telephone connected to BS-H100, press
button briefly or press the call button on the headset.
To transfer a call from the headset to the telephone
connected to BS-H100
, pick up the handset of the telephone
and press button on BS-H100 briefly or press the call
button on the headset.
11
How to use
Transferring a call to the telephone when the handset
is on hook may end the call.
You may talk at the same time by using the handset
of the telephone while the other one is talking on the
headset.