Polycom Vortex EF2211 User Manual

This command sets the effective output gain of the corresponding AEC reference. When doing volume
control of room speakers, it is a good idea to adjust this reference gain along with the speaker output
gain so that the AEC is aware of any volume changes. This will help prevent short echoes when
volume changes are made.
There are two AEC references on the EF2280, EF2241, and EF2241, so there are two separate
commands, REFGAINR1 and REFGAINR2, for controlling the effective output gain of R1 and R2,
respectively.
There is only one AEC reference on the EF2211 and EF2210, so there is only one command,
REFGAINR1 for controlling the effective output gain of R1.
This command was introduced in firmware version 2.5.0.
This command is an integer command. See
Section 6.2 for more information on this type of
command. The minimum and maximum values for this command are -100 and 20, 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
S01REFGAINR16
Set effective output gain of AEC
reference 1 (R1) to 6 dB.
S01REFGAINR16
S01GAINP>3
Increase phone output gain by 3
dB.
S01GAINPx , where x is the new value of the
phone output gain. If this command was
issued after the example above, then the
status message would be S01GAINP9 .
S01GAINP?
Query phone output gain.
S01GAINPx , where x is the new value of the
phone output gain. If this command was
issued after the example above, then the
status message would be S01GAINP9 .
8.140. RING -- Enable or Disable Ring Messages
This command sets or queries the enabled status of the ring message feature. If ring messages are
enabled, a RING status message will be generated each time the connected phone line rings.
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

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