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Vortex EF2211/EF2210
Reference Manual
VORTEX EF2211/EF2210 REFERENCE MANUAL
Polycom, Inc., Copyright 2003 1 Technical Support: 800.932.2774
Introduction....................................................................................................2
Features and Benefits ............................................................................................. 3
Pre-Installation...............................................................................................4
EF2211/EF2210 Front and Rear Panels................................................................ 5
Installation .....................................................................................................6
Mounting the EF2211/EF2210 ............................................................................... 6
Connecting the EF2211/EF2210 to Other Equipment ........................................... 6
Device IDs on the EF Bus....................................................................................... 8
Connecting Multiple Vortex Devices ...................................................................... 8
Factory Default Settings (Preset 0) ........................................................................ 9
Check Surrounding Equipment............................................................................... 11
Integrating the Unit Into Your System ..........................................................14
Input Settings .......................................................................................................... 14
Calibration.............................................................................................................. 14
Set up the Phone Interface (EF2211 Only)............................................................. 16
Build Your Echo Canceller Reference.................................................................... 16
Echo Canceller Reference for Multiple Vortex Devices......................................... 17
Configure the Automatic Microphone Mixer.......................................................... 18
Automixer Settings for Multiple Vortex Devices .................................................... 20
Configure the Matrix Mixer.................................................................................... 21
Building Your System with Multiple Vortex Devices.............................................. 21
The EF Bus ....................................................................................................23
Presets..................................................................................................................... 25
Other EF2211/EF2210 Features............................................................................ 25
LCD Menu Structure .....................................................................................26
System Menu ........................................................................................................... 28
Phone Control (EF2211 Only) ............................................................................... 29
Inputs ...................................................................................................................... 30
Outputs.................................................................................................................... 31
Automixer Menu...................................................................................................... 32
Matrix Menu ........................................................................................................... 34
Parametric EQ Menu.............................................................................................. 35
Presets..................................................................................................................... 36
Macros .................................................................................................................... 36
Troubleshooting .............................................................................................37
Automatic Microphone Mixer................................................................................. 37
Matrix Mixer........................................................................................................... 37
Echo Canceller Reference ...................................................................................... 37
Residual Echo ......................................................................................................... 37
Contacting Technical Support ................................................................................ 42
Technical Specifications ................................................................................43
Compliance............................................................................................................. 44
Conference System Design............................................................................49
EF2211/EF2210 Block Diagram ...................................................................50
Connector Pinouts..........................................................................................52
Connecting Unbalanced RCA to Balanced Terminal Block................................... 54
Making an EF Bus Terminator............................................................................... 54
Additional Notes ..................................................................................................... 55
Warranty Information ....................................................................................56
Definition of Terms .......................................................................................58
Index ..............................................................................................................61
INTRODUCTION
VORTEX EF2211/EF2210 Reference Manual 2 Technical Support: 800.932.2774
I
NTRODUCTION
Welcome Congratulations on your purchase of the Vortex EF2211/EF2210!
How to Use This
Manual
This is a reference manual for your EF2211/EF2210. Information specific to the
EF2211 or EF2210 will be noted as such. The major difference between the EF2211
and the EF2210 is that the EF2210 does not have a phone interface.
This manual is structured to provide the information you need quickly and conve-
niently. The following is an overview of each section:
Introduction
Pre-Installation includes information about the contents of the box, tools needed
for installation and front and rear panel descriptions.
Installation covers connections of inputs/outputs and calibration of inputs of the
EF2211/EF2210.
Integrating the Unit Into Your System describes adjustments to take into consid-
eration when integrating the EF2211/EF2210 with surrounding equipment in
your system.
•LCD Menu Structure describes an overview of the LCD menu structure and also
gives a system overview of features and options available.
Troubleshooting helps to debug problems with installation.
Technical Specifications provides the technical specifications of the EF2211/
EF2210.
Conference System Design gives suggestions on topics to consider when design-
ing your system.
EF2211/EF2210 Block Diagram shows the inside of the EF2211/EF2210.
Connector Pinouts shows pinout diagrams for EF2211/EF2210 input and output
connectors.
Warranty Information
Definition of Terms explains terms used in this manual, as well as terms used in
our technology of echo cancellation, noise cancellation, and audio conferencing.
About the
EF2211/EF2210
The EF2211/EF2210 features industry-leading acoustic echo cancellation technology,
which keeps received audio from being re-transmitted to its original location, and pat-
ented noise cancellation algorithms which dramatically reduce ambient noise in the
audio sent to other sites without affecting speech quality.
Also included in the microphone input is a neural network Automatic Gain Control
that reacts only to valid speech patterns to bring voices within desired levels. AGC
controls are user-adjustable, as are settings for the 5-band parametric EQ offered on
all input and output channels in the EF2211/EF2210.
The EF2211 includes a telephone interface with ambient noise cancellation, which
can dramatically improve the receive audio quality on phone calls.
The EF2211/EF2210 may be programmed directly from the front panel, or through
our Conference Composer software (included), which programs the unit via RS-232.
The unit may additinally be controlled via external RS-232 devices.
INTRODUCTION
© Polycom, Inc. 3 VORTEX EF2211/EF2210 Reference Manual
Product
Registration
Please take a moment to fill out and return your registration card. This information
will help us to provide you with better customer support and will allow us to notify
you with updated product features and software.
F
EATURES
AND
B
ENEFITS
1 mic/line input, 2 line inputs, 3 line outputs
Includes a telephone hybrid, with noise cancellation, for adding phone calls to
conferences
Country specific telephone configuration settting allow use almost anywhere
10 Watt power amplifier for driving audio in the room
Industry-leading acoustic echo and noise cancellaltion ensure the highest possi-
ble audio quality between sites
Includes matrix mixer with arbitrary cross point gain values
Ambient noise cancellation on mic/line input and telephone receive audio
5-band parametric EQ on all inputs and outputs
Up to 32 user configurable presets, 16 factory presets, and 256 macros for flexi-
ble control
May be linked with other Vortex devices via the EF Bus including EF2280,
EF2241, EF2211, EF2210, EF2201, or other Polycom products
PRE-INSTALLATION
VORTEX EF2211/EF2210 Reference Manual 4 Technical Support: 800.932.2774
P
RE
-I
NSTALLATION
What’s Included The Vortex EF2211/EF2210 product package includes the following items:
Vortex EF2211/EF2210 Reference Manual
Vortex EF2211/EF2210
External power supply
Cat 5 cable for EF Bus
Telephone cable (NOT included with the EF2210)
Rack mount screws (4)
3.5 mm terminal block connectors (6)
Cable clamp and screw
CDROM containing other manuals and Conference Composer software
Product Registration Card
What’s Not
Included
The following equipment is not included with the EF2211/EF2210 product package,
but may be necessary to create a completely functional system:
Microphones
Loudspeakers
Audio cables
Videoconferencing codec or other four-wire interface (optional)
RS-232 remote control device (optional)
Tools Needed for
Installation
Screwdriver to mount the EF2211/EF2210 in your rack.
3.5 mm terminal block connector screwdriver
Figure 1. What’s Included with your Vortex EF2211/EF2210.
DOWN HOMEUP
0-3-7-12-20 3 dB
METER
920
PHONE CONNECT
ORTEXORTEXORTEXORTEXOR TEXOR TEXORTEXOR TEXOR TEXORTEXORTEXOR TEXOR TEXORTEXORTEXORTEX
ORTEXORTEXORTEXORTEXOR TEXORTEXORTEXOR TEXORTEXORTEXOR TEXORTEXORTEXOR TEXORTEXOR TEX
EF2211
Vortex
®
EF2211
Vortex
®
EF2210
Cable Clamp
and screw
1-Cat 5 cable
for EF
Bus
1-Telephone cable
External
Power Supply
OR
CD with
control software and manuals
Vortex EF2211/EF2210 Reference
Manual
Vortex
®
EF2211/EF2210
Reference Manual
Terminal Block
Connectors (6)
Rackmount
Screws (4)
x
x
x
x
PRE-INSTALLATION
© Polycom, Inc. 5 VORTEX EF2211/EF2210 Reference Manual
EF2211/EF2210 F
RONT
AND
R
EAR
P
ANELS
1. LCD DISPLAY. Displays menu instructions for configuration and operation of the
EF2211/EF2210.
2. D
OWN BUTTON. Scrolls backward through menu items at a particular level or
decreases the value of a parameter.
3. U
P BUTTON. Scrolls forward through menu items at a particular level or increases
the value of a parameter.
4. E
NTER. Enters the menu and allows you to select and change parameter values.
5. E
SC. Returns to the next highest level of menus.
6. H
OME. Returns to the top of the menu structure.
7. L
EVEL INDICATOR. Indicates the level of the selected channel or parameter.
8. P
HONE CONNECT. Takes the phone line on or off hook. If you have an analog
handset connected to the P
HONE jack on the back panel, pushing this button will
disable the P
HONE jack while enabling the LINE jack (see Item 17).
* This feature is not available on the EF2210.
9. M
IC ACTIVITY LED. Indicates gating activity on the mic/line channel input.
10. I
NPUT PARALLEL PORT. Parallel logic input.
* This feature is not available on the EF2210.
11. O
UTPUT PARALLEL PORT. Parallel logic output.
* This feature is not available on the EF2210.
12. EF B
US IN. Connects to EF BUS OUT of another Vortex device.
13. EF B
US OUT. Connects to the EF BUS IN of another Vortex device.
14. RS-232 S
ERIAL PORT. Connect this to an optional RS-232 remote control device,
such as a touch panel or personal computer COM port.
15. P
OWER SUPPLY INPUT. Connects to the external power supply provided with the
EF2211/EF2210.
16. P
OWER AMPLIFIER OUTPUT. Drives up to 10 W into 4-16 Ohm speakers.
17. P
HONE/LINE JACKS. Use the PHONE jack for connecting an analog handset to the
system. Use the L
INE jack for connecting to an analog telephone line.
* This feature is not available on the EF2210.
18. I
NPUTS. Includes inputs for a microphone or line level input, remote end audio
(line level), and program audio (line level).
19. L
INE OUTPUTS. Line level outputs for an amp, remote audio, and record audio.
Figure 2. EF2211/EF2210 Front and Rear Panels
DOWN HOMEUP
0-3-7-12-20 3 dB
METER
920
PHONE CONNECT
ORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEX
ORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEXORTEX
EF2211
1 23 45 6 78* 9
OUTPUT
INPUT
REMOTE CONTROL
RS-232
EF BUS IN
EF BUS OUT
PHONE LINE
+5, +/-15 VDC
+5, +/-15 VDC
RS-232 PIN 2: TXD, PIN 3: RXD, PIN 5: GROUND, PIN 7: CTS, PIN 8: RTS
EF2211VORTEX
SPEAKER
BA1
OUTPUTS
BA1
INPUTS
10* 11*
1312 14 15 16 17* 1819
INSTALLATION
VORTEX EF2211/EF2210 Reference Manual 6 Technical Support: 800.932.2774
I
NSTALLATION
This equipment is intended to only be installed by qualified service personnel. The
equipment shall be connected to a socket-outlet that provides a protective earthing
connection.
North American
Requirement
CAUTION-To reduce the risk of fire, use only No. 26 AWG or larger telecommunica-
tion line cord.
M
OUNTING
THE
EF2211/EF2210
The EF2211/EF2210 can be mounted in a rack enclosure using four large screws (10-
32x1/2”) included with the unit. One EF2211/EF2210 fits in a single rack space.
Recommendation
For Easy Access
While not required, leave a single rack space in between the EF2211/EF2210 and
other units in your rack. This gives you easier access to the back panel.
Instructions for
Securing Power
Supply to Back of
EF2211/EF2210
Locate the cable clamp on the back panel of the EF2211/EF2210 above the
power connector.
Remove the screw and thread the power cord through the cable clamp.
Attach the cable clamp to the back panel of the EF2211/EF2210 and tighten the
screw. Align the clamp so that the power cable does not interfere with the con-
nectors on the EF2211/EF2210 back panel.
Plug in the power supply.
We recommend that you also Ty-wrap the power supply to the rack. The purpose
of securing the power supply to the back panel is so that if the power supply were
to drop, it would pull where the cord is attached with the cable clamp and not pull
the plug out of the EF2211/EF2210.
C
ONNECTING
THE
EF2211/EF2210
TO
O
THER
E
QUIPMENT
Grounding The EF2211/EF2210 has 1 mic/line input plus 2 line level inputs and 3 line level out-
puts. Each input/output is “Pin 1 compatible” — this means that the ground pin of
each input/output is tied to chassis ground. Chassis ground is connected to the input
power ground.
Caution! Do not use any other power supply other than the one pro-
vided with this unit.
INSTALLATION
© Polycom, Inc. 7 VORTEX EF2211/EF2210 Reference Manual
Typical EF2211/
EF2210
Connections
The EF2211/EF2210 will typically be connected to other equipment in a single room
setup as shown below in Figure 3 and Figure 4.
The following steps are typically used to set up the EF2211/EF2210:
Connect a microphone or line level microphone mix into the M
IC INPUT. Each
Figure 3. Block diagram of typical EF2211/EF2210 connections: a single room using one device.
NOTE: The phone interface is not available on the EF2210.
Figure 4. Typical EF2211/EF2210 connections.
NOTE: The phone interface and parallel logic ports are not available on the EF2210
Polycom Video
CODEC
Line In Line Out
PSTN
Line
Vortex
®
EF2211
Mic In
Far In
Prgm In
Amp Out
Far Out
Rec Out
Spk Out
Phone
EFBus OutEFBus In
OUTPUT
INPUT
REMOTE CONTROL
RS-232
EF BUS IN
EF BUS OUT
PHONE LINE
+5, +/-15 VDC+5, +/-15 VDC
RS-232 PIN 2: TXD, PIN 3: RXD, PIN 5: GROUND, PIN 7: CTS, PIN 8: RTS
EF2211
V
ORTEX
SPEAKER
BA1
OUTPUTS
BA1
INPUTS
PSTN
Polycom Video Codec, 4-wire Connection
Vortex
®
EF2211
POLYCOM CODEC
TX RX
INSTALLATION
VORTEX EF2211/EF2210 Reference Manual 8 Technical Support: 800.932.2774
input accepts 3.5 mm terminal block connectors. See “Connector Pinouts” on
page 52 for pinouts of the terminal block connectors.
Connect S
PEAKER OUTPUT to loudspeaker or AMP OUTPUT to the room amplifier.
If RS-232 remote control is desired, connect the RS-232 R
EMOTE CONTROL port
of the EF2211/EF2210 to the remote control device, such as an RS-232 interface
to a touch panel or a COM port on a personal computer.
On the EF2211, connect the L
INE RJ11 jack to an analog telephone line.
On the EF2211, connect the P
HONE RJ11 jack to an analog telephone set
(optional).
Connect the external power supply to the P
OWER SUPPLY INPUT jack of the
EF2211/EF2210.
Set the country code on the EF2211. By default the phone interface will be dis-
abled until you select a country code for the telephony interface. This can either
be done with the front panel LCD menu, or the RS-232 interface. The country
code only needs to be selected the first time or when the country of the installa-
tion is changed.
D
EVICE
ID
S
ON
THE
EF B
US
When considering which Device IDs can be used for which Vortex device, decide
how many devices have the ability to transmit on the W, X, Y, and Z busses, and how
many have the ability to transmit on the P Bus. The EF2210, for example can only
transmit on the W, X, Y, and Z busses while the EF2211 can transmit on the W, X, Y,
and Z busses as well as the P bus. Up to 8 devices can transmit on the W, X, Y, and Z
busses. Similarly, up to 8 devices can transmit on the P bus. Note that the EF2211
counts as one of both types. All devices that can transmit on the same bus output(s)
must have unique device IDs. If the device IDs of linked Vortex devices are the same,
the front panel LCD screen will display “EFBus Error: Dev. ID Conflict”.
C
ONNECTING
M
ULTIPLE
V
ORTEX
D
EVICES
Up to 8 echo cancellation Vortex devices in combination can be linked together at one
time and up to 8 phone interface Vortex devices in combination can be linked together
at one time (See Device IDs on the EF Bus above). Keep in mind that there are units
that are considered one of both types (such as the EF2241 or EF2211). Each unit in
the chain must have a unique Device ID. Use the EF Bus to link multiple Vortex
devices together.
The following steps should be followed to connect the EF Bus:
1. Set a unique Device ID for each Vortex device. The Device IDs range from 00 to
07.
2. Power off all units.
3. Connect the RS-232 remote control device to any Vortex device in the chain.
4. Connect the provided Cat-5 cable between the EF B
US OUT of the first device,
and the EF B
US IN of the second device.
Note.
The EF Bus must be connected so that the EF Bus In of one
box is connected to the EF Bus Out of another. Connecting
the EF Bus In to another EF Bus In (or Out to Out) will not
work.
DEFINITION OF TERMS
VORTEX EF2211/EF2210 Reference Manual 58 Technical Support: 800.932.2774
D
EFINITION
OF
T
ERMS
Acoustic Echo Acoustic echo occurs in a conferencing or distance learning system when the remote
speech played in the loudspeakers is picked up by microphones in the room and is
transmitted back to the remote end. This transmitted signal is a delayed version of the
original, which causes the echo.
Acoustic Gain Acoustic gain is a term used in conjunction with sound reinforcement. It refers to
how much louder the audio is with sound reinforcement compared to without sound
reinforcement.
Ambient Level The ambient level, also referred to as noise floor, is the background noise heard in a
room when no one on the near or remote end is talking.
Automatic Gain
Control (AGC)
Automatic gain control increases or decreases the gain on an audio signal to an
acceptable value.
Automatic
Microphone Mixer
A microphone mixer that turns microphone channels on and off based on the signal
level going into the microphone.
Convergence
Rate
Convergence rate refers to the amount of echo a line or acoustic echo canceller can
cancel per unit time, typically expressed in dB/sec. Better echo cancellers have a
higher (faster) convergence rate. This term is typically used to quantify the time it
takes to completely remove the echo from a conferencing system. Echo occurs due to
a complete change of the acoustic environment such as the beginning of a phone call
in a conference, a change of microphone-speaker placement, or speaker volume
adjustment.
Crosspoint Mix
Minus Bus
A mix minus bus allows each Vortex device to create a mix of signals without its own.
Each device in the system can create four mixes (W, X, Y, and Z) and place them on
the bus. Each device also can create three mixes each from the W, X, Y, and Z busses
of the other devices (for a total of 12 mixes). One mix is hardwired as a normal mix
minus. That is, it is a unity gain mix of the signals from all other devices. The other
two mixes can have crosspoint gains on the signals from the other devices.
Echo Canceller An echo canceller estimates the echo in an audio signal by using a reference and pre-
forms processing to eliminate the echo from the signal.
60

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