Polycom Vortex EF2211 User Manual

S01MUTEO*?
Query mute status of all outputs.
S01MUTEO*abcd , where each of the letters
(a, b, etc.) is either 0 or 1 depending of the
current status of the mute on the
corresponding output. If this command was
sent after the example above, then the status
message would be S01MUTEO*0110
8.109. NC -- Enable Noise Cancellation
This command sets or queries the status of the Noise Cancellation (NC) algorithm on input channels 1
and T .
When the wildcard character, '*', is used to specify the channel in this command, it only affects input
channel 1. To set or query the telephone input channel, T, you must specify it explicitly (e.g., '' ''
'S01NCT1', '' '' 'S01NCT?').
This command is a channel boolean command. See
Section 6.3 and 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
S01NC11
Enable NC on input channel 1 .
S01NC11
S01NCT0
Disable NC on input channel T.
S01NCT0
S01NC12
Toggle NC state on input channel 1 .
S01NC1x , where x is 0 or 1 depending on
the current state of NC on input channel 1 .
S01NC1?
Query NC state on input channel 1 .
S01NC1x , where x is 0 or 1 depending on
the current state of NC on the input channel.
S01NC*1
Enable NC on input channels 1 and T .
S01NC*1
S01NC*0
Disable NC on all microphone input
channels (only input 1 on EF2211) .
S01NC*0
S01NC*2
Toggle NC state on all microphone input
channels (only input 1 on EF2211) .
S01NC*x , where x is 0 or 1 depending on
the current state of NC for each of the
corresponding input.
S01NC*?
Query NC state on all microphone input
channels (only input 1 on EF2211) .
S01NC*x , where x is 0 or 1 depending on
the current state of NC for each of the
corresponding input.
8.110. NCL -- Set Noise Cancellation Attenuation
This command sets or queries the attenuation level of the Noise Cancellation algorithm on input
channels 1 and T . For example, if NCL is set to 10, then the Noise Cancellation for that channel will

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