AASTRA 4187 Plus for BusinessPhone User Guide EN - Manual (Page 29)

29 BusinessPhone – Dialog 4187 Plus
During Calls
Inquiry
During an ongoing conversation you want to make an inquiry to an
internal or external party. ¸
Press.
The first call is put on hold. z
Call the third party.
When the third party answers, you can switch between the calls,
create a conference and end one of the calls.
Refer back
You can switch between connected parties: ¸ 2
Switch between calls.
¸ 1
Press to terminate.
The ongoing call is terminated. The other call is connected.