11
Adjustingthe Sensitivity of the Microphone
Wherethere is a lot of background noise, for example, due to traffic or
machinery,it may be necessary to adjust the sensitivity of the
microphone.
Toadjust the sensitivity of the microphone:
REAROF UNIT
DOORPHONE
MODULE
-
+
Insertflat-headed
screwdriverhere.
Locatethe switch.
Turnthe switch clockwise (-)
ifsited in a noisy location.
Turnthe switch counter
clockwise(+) for normal
noiselevel (factory setting).
Operation
Callingfrom doorphone:
1.Press the call button (see Figure 12).
Thecaller hears confirmation tone.
2.Wait for answer. Talk.
Callingfrom an extension:
1.Pick-up your handset.
2.Dial the Doorphone's extension
number,refer to your PBX User
Manualfor this number.
CALL
BUTTON
Figure12