Section 3 – adjustments, Speaker volume, Microphone gain – DoorKing 1808 Telephone Access Plus User Manual
Page 51: Ov (over voltage)

SECTION 3 – ADJUSTMENTS
Speaker Volume
The speaker volume potentiometer is labeled SPEAKER VOL on the control board. The speaker
volume should be adjusted for adequate sound. Adjusting the speaker volume too loud could cause
feedback from the microphone.
1. Open the front of the telephone entry system and locate the speaker volume adjustment.
2. Place a call to a resident by entering a directory code on the keypad. While they are talking,
adjust the speaker volume potentiometer for adequate sound. To increase the volume rotate
the potentiometer clockwise, to decrease the volume rotate the potentiometer counter
clockwise.
Microphone Gain
The microphone gain potentiometer is labeled MIC VOL on the control board. This adjustment
increases or decreases the loudness in the telephone handset in the house.
1. Open the front of the telephone entry system and locate the Mic Vol adjustment.
2. Enter a directory code on the keypad to place a call to a resident. After they answer, adjust
the microphone gain and ask the resident to let you know when the loudness in their
telephone handset is set to a comfortable level.
OV (Over Voltage)
The OV LED is ON when input voltage (16 VAC) is too high. Board automatically shuts down.
1810-162-J-1-12
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51
Master Code
Push Button
Master Code
LED
Microphone
Gain Adjust
Speaker
Volume
Adjust
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Mic
Vol
Master
Code
1 2 3 4 5 6 7 8 9 1011
Speaker
Vol
Keypad
ON
SW1
MODEM / TCP ENB
1
2
3
4
5
6
7
8
BAD DNS
RS-485 RX
LAN DOWN
Phone Line
In Use
L
AN
Conn
e
c
ti
o
n
Dat
a
Tr
a
n
s
m
it
SW2
ON
TERMINATION
OFF
OV