Axis Communications 2400, 2401 Troubleshooting the Audio Module, Simplex Talk, Simplex Listen

36 The AXIS 2191 Audio Module AXIS 2400/2401 Admin Manual

Simplex - Talk

Simplex - Talk mode means that only the web-client end of the connection can transmit audio (that is, to the AXIS 2191). This can be used to e.g. provide spoken instructions to a person seen in the image from the video server. This mode also requires the Push-to-Talk button.

Simplex - Listen

Simplex - Listen mode can only receive audio from the AXIS 2191 to the web-client. This can be used in remote monitoring, web attractions etc., to provide live audio, as well as video, of a monitored situation.

Troubleshooting the Audio Module

Symptoms	Possible causes	Remedial actions
No audio controls below	The AXIS 2191 is not selected	In the server’s administration tools, click on the icon for COM2 and
image.	for use on COM2.	set the purpose to AXIS 2191 Audio Module.
	Wrong video server firmware.	If the AXIS 2191 does not appear as a purpose for COM2 in the
		Administration Tools, the server does not have the correct firmware
		and must be upgraded. See Updating the Firmware, on page 44.
No sound from the AXIS	Incorrect settings or faulty	Check that:
2191 or from a PC trying to	connections.	• sound card, speakers and microphone are connected
access a web page		• the Mute button is not pressed
containing audio content.
		• the Int/Ext switch for the input is in the correct position
		• the input and output levels are correct
		• all cabling is connected and all power switches are ON
No audio signal from PC to	The Post Content Length set	Set the value of the Post Content Length in your proxy server to 1MB
the AXIS 2191 when passing	in the proxy server is too low.	or more. You may need to contact your system administrator to do
a proxy server.		this.
No full-duplex function.	Incorrect configuration.	Check the setting in the server’s administration tools.
	Sound card does not support	For information on how to check if your sound card supports
	full-duplex.	full-duplex, please visit www.axis.com and see the support section for
		Axis camera and video products.
Poor performance.	Too many users/clients.	Try limiting the number of clients allowed to connect.
	Low bandwidth.	Reduce the available bandwidth by changing to a lower setting in the
		Available Bandwidth selector. Setting a lower bandwidth will reduce
		any break-up in the sound, but will also increase the transmission
		delay.
		If running in Full-Duplex mode, try switching to Half-Duplex mode.
Whining or screeching sound	Poor positioning of speakers	Relocate the speakers or microphone so that they do not point
from speakers (feedback).	and/or microphone.	towards each other, and/or lower the volume.
Poor sound on headphones.	Incorrect connection.	Headphones can only be used by connecting them to Speaker-Out on
		the terminal connector.
The Power indicator LED is	Faulty power supply.	Verify that you are using an AXIS PS-D power supply.
not constantly lit.
The AXIS 2191 works locally,	Firewall protection.	Check the Internet firewall with your system administrator.
but not externally.	Default routers required.	Check if you need to configure the default router settings.

Note: If you still have a problem after reading this information, contact your reseller, or visit www.axis.com and check the support section for Axis camera and video products.