Polycom Vortex EF2211 User Manual

for Automixer
This command sets the local maximum number of open mics (NOM) allowed for the specified
automixer. The NOM limit is a local limit, meaning that this limit applies only to the specific Vortex that
is is set on. In contrast, the
AMGNOM command is a global limit that applies to all linked Vortex
automixers with the same
AMBUSID.
The first argument of this command specifies the automixer number (always 1 on the EF2211) to
adjust. The second argument specifies the NOM limit (always 1). Even though this is a channel integer
command, use of the wildcard for specifying the automixer number is not supported.
This command is not particularly useful on the EF2211 since there is only one mic on this device.
However, it is provided in order to be consistent with the command sets of the other Vortex devices.
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 64,
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
S01AMNOM11
Set local NOM for automixer 1 to a
maximum of 1 mics.
S01AMNOM11
S01AMNOM1?
Query current local NOM limit for
automixer 1.
S01AMNOM1x , where x is always 1, since
there is only 1 mic on this device.
8.25. AMNOMAT -- Select NOM Attenuation on Each Output
This command enables, disables, or queries NOM attenuation for the specified output (1, A, B, T) . .
NOM attenuation is calculated as 10*log(Number of Open Microphones).
Remember that even though there is only one microphone on this device, other microphones can be
brought in via the W, X, Y, and Z busses. These signals will have NOM information carried with them
from the other devices, which is why NOM attenuation is provided at the outputs.
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

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