Instruction manual
AXIS 2400+/2401+ Admin Manual The AXIS 2191 Audio Module
 29 
The Front Panel
The Rear Panel
Power Connector 
 Power Indicator - Normally lit.
Serial Port Connector - Connect 
the serial cable from here to the serial 
port on the video server.
Activity Indicator - Lights up when the 
server has configured the audio module.
Level In/Level Out
The colors used to indicate the input and output levels are:
• Green - Level OK
• Yellow - Risk for overload
•Red - Overload
Terminal Block Connector 
 Used for:
• Line-In (e.g. CD, radio)
• Speaker-out (headphones or speakers 
without amplifier)
Volume In
Level control for 
input. Use a 
screwdriver to 
adjust.
In
3.5mm socket 
for connection 
of external 
microphone. 
Mic
Built-in 
omni-direc-
tional micro-
phone.
Volume Out
Level control for 
speaker volume. 
Use a screw-
driver to adjust. 
Line Out
3.5mm socket 
for speakers 
with built-in 
amplifier, e.g. 
PC speakers.
Int-Ext
Set to Int for 
internal micro-
phone or Ext 
for external 
microphone or 
Line-In.










