Product manual

FAQs
I get a lot of errors such as PUTGET when I try to connect to the XAP units using G-Ware. You are
trying to connect a later version of G-Ware to an earlier firmware version in the XAP unit that is not
compatible. Please see the XAP G-WARE 103 Technical Note
.
Firmware
How do I upgrade the firmware of my XAP or PSR1212 unit?
G-Ware releases always include the necessary firmware files to update your units. See the XAP G-WARE
108 Technical Note. You will also find upgrade instructions in the help file.
How do I determine the firmware version in my unit?
The firmware version is accessed through the front panel LCD screen. For XAP and PSR products, press
Enter twice and the up arrow once. For AP and the GT1524 products, the firmware version is displayed
on the LCD screen until a front panel button is pressed. If a button is pressed, you will need to wait 10
minutes for the version display to return or power cycle the unit and the version will display. The
telephone hybrid units do not have an LCD. You can find the firmware version by checking in the Unit
Properties window when connected with G-Ware or AP-Ware.
Echo Cancellation
What is an AEC Ref?
Acoustic Echo Cancellation Reference. Echo cancellation is the removal of echo based on a comparison
of incoming audio and outgoing audio (i.e., preventing distant site audio picked up by microphones from
being retransmitted to the originating site). In order to work, the echo cancellation circuit needs to know
what output audio to look for. The AEC Ref point is the output each microphone will sample for the
comparison. The reference channel can be an output, expansion bus output (to reference an output on
another unit), or a virtual output (which allows signal combining).
What is a virtual reference?
A virtual reference is an echo cancellation reference point, outside of the G-Ware standard matrix routing
grid, that combines multiple signals or removes signals for echo canceling. It is virtual because it does not
use up any of the standard analog outputs. Using G-Ware, you can create up to four virtual references
and still have all outputs available for audio routing.
Why do the callers still hear echo even though I have set the AEC Reference channel?
There are several reasons callers might hear echo.
• Verify that each microphone is using the correct AEC reference.
•· If the output of the AEC Reference channel is muted, the AEC comparison will not take place,
and therefore the AEC will act as if it is turned off.
•· AEC References are not set up properly for linked units. Make sure each unit is referencing the
proper AEC channel over the expansion bus.
•· Microphones settings are too sensitive. Settings should read between 0dB to 5dB on the Post
Gain meter.
•· Room is very live and reflective. You can increase the unit's ability to suppress echo by
changing the NLP to Medium. However, the best solution is to acoustically treat the room to
reduce audio reflections.