Polycom Vortex EF2241 Application Note

with. The nominal input and output of the codec is .3 V rms. The nominal input and
output of the Vortex device is .775 V rms. This equates to a difference of 8.24 dB between
the two nominal levels. For simplicity, you may round that value to 10 dB.
SETTING THE AEC REFERENCE USING AN IPOWER 900
1. Open AdminTools (there should be a shortcut on the desktop), select the Audio Category, and click
on the Audio Inputs tab. De-select Use Echo Cancellation, Use Noise Suppression, and Use
Automatic Gain Control (AGC)
2. Make sure that the Input to the Vortex device is assigned to the appropriate AEC Reference signal.
Consult the Reference Manual for the Vortex device or the Help file in Conference Composer for
more information.
15

Polycom Vortex EF2241 Specifications

General

Brand	Polycom
Model	Vortex EF2241
Category	Telephone Accessories
Language	English