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
S01AMOFFAT118
Set off attenuation for automixer
1 to 18 dB.
S01AMOFFAT118
S01AMOFFAT1?
Query current off attenuation for
automixer 1.
S01AMOFFAT1x , where x is between 1 and
100 depending on the current setting of the
off attenuation for automixer 1.
8.27. AMPRIOR -- Set Gating Priority for the Specified Mic
This command sets the automixer gating priority for the specified input channel. Priority levels of 1-4
are allowed with 1 being the highest priority and 4 being the lowest.
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
S01AMPRIOR11
Set microphone input 1 to gating
priority 1.
S01AMPRIOR11
S01AMPRIOR1?
Query current gating priority for
microphone input . 1.
S01AMPRIOR1x , where x is between 1 and
4 depending on the current gating priority
setting for microphone input . 1.
8.28. AMREFB -- Set Automixer Reference Bias for the
Specified Automixer
This command sets or queries the reference bias for the automixer reference mode feature of the
specified automixer. When enabled, the automixer reference feature uses the AEC reference to
prevent local microphones from gating on audio from the remote side. The
AMREFE command controls
the enabled status of this feature. The AMREFB command can be used to bias the AEC reference
signal to make the automixer even less likely to gate on remote audio.
The first argument in this command specifies the automixer number (always 1 on the EF2211) and the
second argument specifies the reference bias in dB.

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