Unify OpenScape Desk Phone IP 55G User Manual page 57

Basic functions
Pickup call
Ignore
Picking up a group call
The context menu display changes:
Select the softkey to confirm.
or
^
Lift the handset (only if the appropriate function is set by your administrator)
or
Press the key with the "Call pickup" function or press it again if call answering
was initiated via the key. The speakerphone function is activated.
Ignoring a group call
Select and confirm the option shown.
Select the softkey to confirm. The phone stops signalling the group call.
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