Unify OpenScape 4000 - Call Waiting with a Direct Station Select (DSS) Key

Phoning on several lines (multi-line) 151
Call waiting with a direct station select (DSS) key
Prerequisite: You have set up DSS keys on your phone  page 17. The de-
sired participant’s line is busy.
Press the DSS key.
The participant called accepts your call waiting.
^ Lift the handset.
or
: Press the key and use speakerphone mode.
Line
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