Buch1 > Short Reference > Call Waiting
Call Waiting
Rejecting a Knocking Caller (on an Analogue Internal Phone)
R    0
R
Query key or Flash key)
Accepting a Knocking Caller and Disconnecting the Active Call (on an Analogue Internal Phone)
R    1
R
Query key or Flash key
Accepting a Knocking Caller and Putting the Active Call on Hold (on an Analogue Internal Phone)
R    2
R
Query key or Flash key