Door Speech Volume Adjustment - Bell System 2-72 Multi Way Installation And Operating Manual

tabellet Apartment Station 2-72 Way System

Door Speech Volume Adjustment

Introduction
The speech level heard by a caller at the door is adjustable by use of three pushbuttons on
the BFD8/72 door controller. This is useful if the door is on a noisy street, or alternatively
in a quiet location. Speech gain in the other direction is fixed.
Method
To perform volume adjustment, first borrow the jumper from Prog-6 and place it on the two
pin header ZLK. The Yellow Speech LED should light.
WARNING. A power fail during a Save may require the unit to be returned to Bell System
for reprogramming. Do not perform volume adjustment without the jumper in place.
8 presses of Vol+ doubles the volume level and 8 presses of Vol– halves it. Pressing
Save stores the new value. Increasing the volume too far will make speech less stable
and there will be a tendency for feedback – intermittent screeching and howling. If this
happens press Vol– four times and Save and test again.
The new level is tested by ringing one or more apartment stations and talking to them.
Finally return the jumper to its original location on Prog-6.
Camera 1
–
+
Cam2
4 3 2 1 0
Video
Gain
SW1 SW2
Off-On Off-On
bell
System
© 2010
1
PD-307 Issue 2
Camera 2 Video
– –
M S + M S +
100 100
75 75
High High
Cam1 Cam2
Speech
Vol+
Vol-
Save
Panel
Speaker
Status
SW3
Off-On
Enhanced Speech
BFD8/72
Door Controller
2 3 4 5 6 7 8 B1 B2
Call Buttons
Installation and Operating Manual
Input
Audio Data Video Audio
Commn
– – –
2 1 B A + 2
Video
Label BFD8/72
Version No
Build No
ZL Prog
1
ZLK
Test
Prog-6
1
free
bell
Lock
Power
– –
LR LS LL LC + +
Exit Door
DDA
Output
Data
Commn
– –
1 B A
Audio
Panel
Tone
Volume
– – –
+ + +
Lock 12V 12V
Power
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