Polycom Vortex EF2211 User Manual

This command is saved to non-volatile memory only as part of a preset. The state of this command
will be restored after power-up only if a preset is saved and that preset is set to be the power-on
preset.
Example Description Status Message
S01AEC11
Enable AEC on input channel 1.
S01AEC11
S01AEC10
Disable AEC on input channel 1.
S01AEC10
S01AEC12
Toggle AEC state on input channel 1.
S01AEC1x , where x is 0 or 1 depending on the
current state of the AEC on input channel 1.
S01AEC1?
Query AEC state on input channel 1.
S01AEC1x , where x is 0 or 1 depending on the
current state of the AEC on input channel 1.
8.4. AECMODE -- Set Amount of Double Talk Suppression
used in the AEC.
This command sets the amount of double talk suppression used in the AEC on input channel 1. The
values correspond to the following settings.
● 1 = No Suppression
● 2 = Light Suppression
● 3 = Heavy Suppression
● 4 = Half Duplex
This command is a channel integer command. See
Section 6.3 and Section 6.2 for more information
on this type of command. The minimum and maximum values for this command are 1 and 4,
respectively.
This command is saved to non-volatile memory only as part of a preset. The state of this command
will be restored after power-up only if a preset is saved and that preset is set to be the power-on
preset.
Example Description Status Message
S01AECMODE13
Set AEC on input channel 1 to Heavy
Suppression.
S01AECMODE13
S01AECMODE1?
Query AEC suppression level on
input channel 1.
S01AECMODE1x , where x is 1, 2, 3, or 4
depending on the current setting of the AEC
suppression level on input channel 1.
8.5. AGC -- Enable or Disable Mic/Line Input Automatic
Gain Control
This command sets or queries the status of the Automatic Gain Control (AGC) algorithm on input

Polycom Vortex EF2211 Specifications

Power

input voltage	110-240 VAC
frequency	47-63 Hz
power consumption	25 W
phantom power	24 V

Connectors

RS-232	DB9F
EF Bus In/Out	RJ45
Telephone Line/Set	RJ11
Control/Status	DB25F
Audio	3.5mm quick connect terminal blocks

Audio Specifications

microphone input	-30 dBu to +0 dBu
line inputs	-20 dBu to +0 dBu
line outputs	-20 dBu to +0 dBu
loudspeaker output	10 W, 4-16 Ohms
input impedance	10 k Ohms
output impedance	50 Ohms
headroom	20 dB
signal to noise ratio	85 dB
frequency response	20 Hz - 22 kHz

Echo and Noise Cancellation

total cancellation	65 dB
convergence rate	40 dB/second
noise cancellation	0-15 dB
echo cancellation	40 dB, total >65 dB
convergence	30 dB/second
cancellation span	32 ms
acoustic echo cancellation span	270 ms

Operating Environment

operating temperature	0 °C - 40 °C
status outputs	5 V, 20 mA each

Weight and Dimensions

width	483 mm
length	244 mm
height	45 mm
weight	1.8 kg
shipping weight	2.5 kg