OpenPhone 71/73/75 System Telephones Using a Headset
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For the System Administrator:
You will find more information on connecting a headset and suitable devices in
the “Mounting and Commissioning” guide in the chapter “Extensions and Acces-
sories for System Telephones”.
Note: Connected headsets must conform with the standard
DIN EN 60 950-1, Point 6.2 (“Safety of information technology
equipment including electrical business equipment”). For
more information on this and a list of headsets which meet
these requirements please refer to our website at
www.Aastra-DeTeWe.de. You can also contact a headset ma-
nufacturer of your own choice, of course.
You are telephoning over
the handset, open-
listening is switched on
(LED of the key
L
flashes); you want to let
another person listen in
on the call over the
headset.
KPress the headset
key.
Listening-in over the
headset is now activated
(LED of the key
K
flashes).
End listening-in:
KPress the headset
key (LED of the key
K
is off).
End open-listening:
LPress the hands-
free/open-listening key
(LED of the key
L is
off).
You are telephoning over
the headset and want to
end the call.
KPress the headset
key.
The connection is ended
(LED of the key
K is
off).
Situation: Operation: Result:
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