Polycom Vortex EF2211 User Manual

This command sets or queries the status of the auto answer feature.
This command is a boolean command. See
Section 6.1 for more information on this type of command.
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
S01AA1
Enable auto answer mode.
S01AA1
S01AA0
Disable auto answer mode.
S01AA0
S01AA2
Toggle auto answer mode.
S01AAx , where x is 0 or 1 depending on the current state of
auto answer mode.
S01AA?
Query auto answer mode.
S01AAx , where x is 0 or 1 depending on the current state of
auto answer mode.
8.2. ACKMOD -- Enable or Disable Acknowledgment Mode
This command controls whether or not status messages are sent. See Section 5 for more information
on status messages. This parameter is enabled by default, and it is rarely turned off by the host
controller.
This command is a boolean command. See Section 6.1 for more information on this type of command.
This command is saved to global non-volatile memory and is not part of a preset. Its value is saved
each time it is changed. It will retain its value after power-down. Since this command writes to non-
volatile memory, there will be a delay before an acknowledgment is returned.
Example Description Status Message
S01ACKMOD1
Enable acknowledgement mode.
S01ACKMOD1
S01ACKMOD0
Disable acknowledgement mode.
S01ACKMOD0
S01ACKMOD2
Toggle acknowledgement mode.
S01ACKMODx , where x is 0 or 1 depending on the
current state of acknowledgement mode.
S01ACKMOD?
Query acknowledgement mode.
S01ACKMODx , where x is 0 or 1 depending on the
current state of acknowledgement mode.
8.3. AEC -- Enable or Disable Acoustic Echo Cancellation
This command sets or queries the status of the Acoustic Echo Cancellation (AEC) algorithm on input
channel 1.
This command is a channel boolean command. See
Section 6.3 and Section 6.1 for more information
on this type of command.

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