Polycom Vortex EF2211 User Manual

The last byte (ä) consists of only one value.
ä = 0x84 = 132 → 132 - 132 = 0 = Idle
So, we know that the AEC on input 1 is in idle mode.
In the above description, the data in the BLDATA command consists of 13 bytes (4 input levels + 5
output levels + 1 AEC reference level + 1 room gain level + 1 AGC gain level + 1 AEC state). It is
possible to tell the EF2211 to only send a subset of this information. There are two reasons you might
want to do this. First, it makes parsing the data easier since you can ask for only the data that you are
interested in. Second, when you decrease the amount of data being sent, the EF2211 can send the
messages faster. This means that if you are trying to implement a signal level meter, you can get
faster refresh rates by asking the EF2211 to only send the data you're interested in.
Suppose you were only interested in signal levels on inputs A-B. You could send the following
command.
S01BLINFO0110000000000
In the above
BLINFO command, there are 1's in the positions of the data that we want and 0's in the
positions of the data that we don't want. Now, when we send a BLDATA? command or enable
BLAUTO, the Vortex sends messages of the form:
S01BLDATAii
Where the ii bytes are the signal levels for inputs A-B.
8.33. BLINFO -- Select Information to be Reported in
BLDATA
This command controls which bytes are sent in the BLDATA command. See the description of the
BLDATA command for more information on the BLINFO 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.
8.34. BROAD2 -- Broadcast Arbitrary Command Strings to
RS-232 Port
This command is used to broadcast arbitrary commands to the RS-232 port for controlling other
devices (not necessarily other Vortex devices). For example, ' ' ' S01BROAD2:ATDT4048921180' ' '
would cause the Vortex to send out 'ATDT4048921180' via its RS-232 port. If a modem was
connected to the RS-232 port, this command would cause the modem to dial the Polycom Installed

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