TEMA TELECOMUNICAZIONI SRL
Doorphone PBX interface AA-11
MAS-AA11-REV02EN
Page 5 of 12
4. GENERAL DESCRIPTION
4.1. Front
view
AA-11
•
Screw terminals 1 and 2 are for connecting Aux 1 relay (without common contacts)
•
Screw terminals 3 and 4 are for connecting Aux 2 relay (without common contacts)
•
Screw terminal 5 is for connecting one wire of the electric door lock (AA-11 will connect this
point to screw terminal 9 in order to open the door); the other wire has to be connected to the
doorphone power.
•
Screw terminal 6 (AA-11 audio input) is for connecting the doorphone microphone.
•
Screw terminal 7 (AA-11 audio output) is for connecting the doorphone speaker.
•
Screw terminal 8 is for connecting the doorphone button.
•
Screw terminal 9 is for connecting the doorphone microphone and speaker common signal.
•
Screw terminals 16-17 are for connecting the PBX extension line.
4.2. Volume
adjustment
The three trimmers on the top side (see picture below) adjust the microphone and speaker volume.
Mic
= external doorphone microphone sensitivity
Alt
= external doorphone speaker sensitivity
Bal
= echo cancellation level
Before proceeding to the installation it is advisable to set the trimmers to half range. Then adjust
the Mic trimmer to obtain a good listening volume at the operator phone, then adjust the Alt
trimmer to obtain a good listening volume at the external doorphone. Should hisses be heard
(Larsen effect) try adjust the Bal trimmer or to reduce the Mic/Alt trimmer values. Larsen effect
depends on the external doorphone acoustic condition. It might be necessary to adjust the
trimmers before installing AA-11 on the DIN rail, depending on the position where it will be
installed. If it is the case, connect AA-11 and adjust the trimmers before mounting it on the rail.
Line
- +
- +
- +
Bal Mic Alt
Top view
- +
- +
- +
Bal Mic Alt
AA-11
Door Phone Interface - Extension
