CLEAR-COM ENCORE
AB-120 ANNOUNCER CONSOLE
INSTRUCTION MANUAL
AB-120 Announcer Console Instruction Manual
© 2009 Vitec Group Communications Ltd. All Rights Reserved.
Part Number 810496Z Rev. 1
Vitec Group Communications LLC
850 Marina Village Parkway
Alameda, CA 94501
U.S.A
Vitec Group Communications Ltd
7400 Beach Drive
IQ Cambridge
Cambridgeshire
United Kingdom
CB25 9TP
Vitec Group Communications
Room 1806, Hua Bin Building
No. 8 Yong An Dong Li
Jian Guo Men Wai Ave
Chao Yang District
Beijing, P.R. China 100022
® Clear-Com, CellCom/FreeSpeak and the Clear-Com Communications Systems logo are registered trademarks of
The Vitec Group plc.
Website: www.clearcom.com
CONTENTS
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Selecting Microphone Amplifier Gain. . . . . . . . . . . . . . . . . . . 1-3
Microphone Preamplifier Gain . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Line Output Level Select . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Options for Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Power from the IFB Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Power from the Intercom Line . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Power from an External DC Supply . . . . . . . . . . . . . . . . . . . . 1-4
Rear Panel Connectors and Controls . . . . . . . . . . . . . . . . . . . . . .1-5
Headset Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Mic Out Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Intercom Line Connectors (XLR 3 male and female). . . . . . . . . 1-6
IFB (XLR 3 female) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Description of internal jumper options and adjustments . . . . . . . .1-7
Jumper Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
JP1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
JP7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
JP8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
JP9 and JP10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
JP11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Microphone Output Pad. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Dip Switch Selection of Earphone Output . . . . . . . . . . . . . . . .1-10
Headphone Sidetone Adjustment . . . . . . . . . . . . . . . . . . . . . . 1-10
Application of Various Intercom System Types . . . . . . . . . . . . . . 1-11
Clear-Com Party-Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
IFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
INTERCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Power. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-11
Setting Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Setting Dip Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Wiring of Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-12
TW Party-Line Systems (RTS) . . . . . . . . . . . . . . . . . . . . . . . . 1-13
IFB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
INTERCOM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
POWER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-13
Channel Select Switch = ‘1’ . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
1
Setting Jumpers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Setting Dip Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Wiring of Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-14
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Sportscaster Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Momentary Microphone Mute . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Announcer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Latching Microphone. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
AB-120 System Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
GLOSSARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . W-I
TECHNICAL SUPPORT & REPAIR POLICY. . . . . W-V
TECHNICAL SUPPORT POLICY. . . . . . . . . . . . . . . . . . . . . . . . . . W-v
RETURN MATERIAL AUTHORIZATION POLICY . . . . . . . . . . . . . W-vi
REPAIR POLICY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W-viii
2
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
Please read and follow
these instructions
before operating this
product.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with dry cloth.
7. Do not block any ventilation openings. Install in accordance with
the manufacturer’s instructions.
8. Do not install near any heat sources such as a radiators, heat
registers, stoves, or other apparatus (including amplifiers) that
produce heat.
9. Only use attachments/accessories specified by the manufacturer.
10. Use only with the cart, stand, tripod, bracket, or table specified by
the manufacturer, or sold with the apparatus. When a cart is used,
use caution when moving the cart/apparatus combination to avoid
injury from tip-over.
11. Unplug this apparatus during lightning storms or when unused for
long periods of time.
12. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way, such
as power-supply cord or plug is damaged, liquid has been spilled
or objects have fallen into the apparatus, the apparatus has been
exposed to rain or moisture, does not operate normally, or has
been dropped.
13. WARNING: To reduce the risk of fire or electric shock, do not
expose this product to rain or moisture.
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
Please familiarize yourself with the safety symbols in Figure 1. When
you see these symbols on this product, they warn you of the potential
danger of electric shock if the station is used improperly. They also
refer you to important operating and maintenance instructions in the
manual.
3
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
This symbol alerts you to the presence of uninsulated dangerous
voltage within the product's enclosure that might be of sufficient
magnitude to constitute a risk of electric shock. Do not open
the product's case.
This symbol informs you that important operating and maintenance instructions are included in the literature accompanying
this product.
Figure 1: Safety Symbols
EMC AND SAFETY
The GPI-6 General Purpose Inputs Interface meets all relevant CE and
FCC specifications set out below:
EN55103-1 Electromagnetic compatibility. Product family standard for
audio, video, audio-visual, and entertainment lighting control apparatus
for professional use. Part 1: Emissions.
EN55103-2 Electromagnetic compatibility. Product family standard for
audio, video, audio-visual, and entertainment lighting control apparatus
for professional use. Part 2: Immunity.
And thereby compliance with the requirement of Electromagnetic
Compatibility Directive 2004/108/EC and Low Voltage Directive
2006/95/EC
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
4
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
1
OPERATION
INTRODUCTION
Congratulations on choosing this Clear-Com product. Clear-Com was
established in 1968 and remains the market leader in providing
intercoms for entertainment, educational, broadcast and industrial
applications. The ruggedness and high build-quality of Clear-Com
products defines the industry standard. In fact, many of our original
beltpacks and main stations are still in daily use around the world.
The system’s main station is a powerful, yet user-friendly unit that can
serve as the heart of a Clear-Com system. We recommend that you
read through this manual completely to better understand the functions
of the system. If you encounter a situation or have a question that this
manual does not address, contact your dealer or call Clear-Com
directly at the factory. Our applications support and service people are
standing by to assist you (Refer to the Warranty section for contact
information). Thank you for selecting Clear-Com for your
communications needs.
DESCRIPTION
The AB-120 Announcer Console is a compact desktop unit designed
specifically for live event broadcasting. It integrates all of the input,
output, and controls necessary at the announce position, including
intercom, talkback, IFB, and mute.
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
Figure 1-1: AB-120 Product
A low noise, low distortion balanced microphone preamplifier delivers
broadcast quality sound from the announcer’s microphone. The
1-1
AB-120 can be used with virtually any broadcast headset or separate
microphone or headphone fitted with a Switchcraft™ or Switchcraft
style XLR-5M or XLR-6M connector. Microphone gain is jumper
selectable to accommodate all microphone types. The microphone
output stage uses a high grade transformer for driving the line. Output
levels from 0 dB to -50 dB are jumper selectable.
A high output stereo headphone amplifier provides talent with both
program audio and cues from the control room, even in the most noisy
environments. The console can be configured so that intercom audio
and IFB inputs can be heard in the left/right ear or both, helping the
talent to instantly identify the source, The unit accepts one or two
channels of IFB, which can be standard self powered, three pin circuits
like those found on most broadcast IFM systems.
OPERATION
Instant access to an intercom system is available with a talkback
button. If the talkback button is pressed, the microphone is
momentarily switched from on air to intercom use. The Announcer
Console can be connected to virtually any party-line intercom system.
The AB-120 connects directly to a Clear-Com party-line system.
A mute button provides momentary silencing of the microphone.
Alternately, it can be set to latch when pressed, allowing the talent to
switch the microphone on and off with a single switch. The switch is
mechanically and electrically mute to ensure no clicking or switching
noise is heard when pressed.
The AB-120 plugs into and draws power directly from most intercom
and IFB systems, permitting an announce position to be located
virtually anywhere, regardless of AC power. When a powered intercom
or IFB is not available, the console can be externally powered with the
supplied DC adapter.
1-2
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
FRONT PANEL
Interrupt
Non-Interrupt
Mute
Indicator
Interrupt
Interrupt
Level
Control
Mute
Button
Talk Back
Indicator
Figure 1-2: AB-120 Front Panel Controls
Selecting Microphone Amplifier Gain
Talk Back
Button
Announc er Consol e
Non-Interrupt
Non-Interrupt
Level
Control
AB-120
The microphone preamplifier and the output line drive amplifier have
selectable gains allowing the user to tailor the gain structure to the type
of microphone being used and the desired output level. As shipped
from the factory, microphone gain is set for a dynamic mic and the
output level is set for -10 dBu.
Microphone Preamplifier Gain
The microphone preamplifier gain must be set to provide proper
operation of the limiter circuit used in the talkback system. The
preamplifier can be set for gains of 40, 50, and 60 dB. Dynamic
microphones have a nominal output level of approximately -60 dBu.
Electret mic typically have an output level of -40 dBu. Jumpers JP9
and JP10 allow selecting the preamplifier gain to 40, 50, and 60 dB.
INPUT LEVEL JP 9 JP 10
-60 dB (dynamic microphone) 1-2 1-2
-50 dB 2-3 1-2
-40 dB (Electret microphone) 2-3 2-3
Jumpers JP9 and JP10 are normally factory set for -60 dB (dynamic
microphone).
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
1-3
Line Output Level Select
The operating level at the output is selectable to accommodate the
various types of devices that are to be fed. The microphone input of a
console would need -60 dBu whereas the line input of a console might
need a level of -10 dBu.
Jumper JP8 allows the selection of three gain structures for the output
amplifier and the output connector so the rear panel can be plugged
into an alternate header on the printed circuit board that has a 30 dB
pad inserted in the output. The combination of JP8 and the 30 dB pad
allows an output level selection from 0 dBu to -50 dBu in 10 dB steps.
0dBu -10dBu -20dBu -30dBu -40dBu -50dBu
Output ConnectorJ2J2J2J3J3J3
JP8 Position Open 2-3 1-2 Open 2-3 1-2
The output gain is normally factory set to -10 dBu.
Options for Power
The AB-120 can be powered from the intercom line, the IFB line, or
from a local external DC supply. To power it from the intercom line of
the IFB line, the unit needs a minimum of 25 VDC. The AB-120 draws
approximately 100 mA of current with peaks of 120 mA.
The following topics describe how to power the AB-120 from the three
different sources.
Power from the IFB Line
To power the unit from the IFB line, set jump jacks on pins 2 and 3 of
JP5. JP5 selects where the positive DC power is sourced from.
If for noise reasons, pin 1 of the IFB input connector can not be
connected to power ground of the AB-120, the power cannot be
derived from the IFB line.
Power from the Intercom Line
To power the unit from the intercom line, set jump jacks on pins 1 and 2
of JP5. JP5 selects where the positive DC power is sourced from.
Power from an External DC Supply
If power from the intercom line or IFB line is not available then plug in
the DC supply supplied with the unit.
1-4
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
REAR PANEL CONNECTORS AND CONTROLS
+
The rear panel of the AB-120 has the following connectors and
controls.
• Headset connectors
• Microphone Out Connector
• Male/Female Pair of Intercom Connectors
• IFB Input Connector
• 30 VDC Power Connector
• Channel Select Switch
Channel Select
Pin 2 (RTS)
Pin 3 (CC)
IFB
Headset
30V 0.45A MAX
Mic Out
Intercom/Talkback
Figure 1-3: AB-120 Rear Connectors
Headset Connector
The standard AB-120 is shipped with a headset connector designed
for use with any type of announcer headset. Connection is via a
Switchcraft™ XLR-6F connector on the unit. The pinout of the headset
connector is as follows:
1. Microphone Lo (-)
2. Microphone Hi (+)
3. Headphone Common
4. Left Headphone (+)
5. Right Headphone (-)
6. Microphone Shield
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
The headset should have a separate shielded twisted pair of wires
directly to the microphone, otherwise some earphone to microphone
crosstalk may be experienced.
1-5
The connector is also 5 pin compatible and most standard intercom
headsets can be directly plugged into the unit.
Options
The construction of the AB-120 lends itself to modification. The 6 pin
XLR could be replaced with a 5 pin XLR.
Next to the headset connector is a 1/4 inch hole intended for the user
to install a stereo phone jack for a separate set of headphones.
The 8 pin header on the printed circuit board that the headset connects
to has circuits available for preening of electret microphones.
Mic Out Connector
The Mic Out connector provides a feed of microphone input after
amplification. The connector is an XLR-3M and is as follows:
• Pin 1 = ground shield
• Pin 2 = +ve mic output
• Pin 3 = -ve mic output
Intercom Line Connectors (XLR 3 male and female)
The AB-120 has a male and female pair of XLR 3 connectors for the
intercom line. The male/female pair of connectors are wired paralleled
and intended for loop through connection.
The pinout of the connectors when used with a Clear-Com party-line
system is as follows (place the channel select switch to 2):
• Pin 1 - ground shield
• Pin 2 = power (+25 to +30 VDC)
• Pin 3 = audio
The pinout of the connectors when used with TW(RTS) intercom
systems is as follows (place the channel select to the desired channel):
• Pin 1 - ground shield
• Pin 2 = audio 1 and power (+25 to +30 VDC)
• Pin 3 = audio 2
IFB (XLR 3 female)
The AB-120 has female XLR-3 connectors for the IFB input and is as
follows:
1-6
• Pin 1 - ground shield
• Pin 2 = IFB 1 and power (+25 to +30 VDC)
• Pin 3 = IFB 2
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
DESCRIPTION OF INTERNAL JUMPER OPTIONS AND ADJUSTMENTS
The AB-120 has internal jumper options, connector selectable
microphone output levels, dip switch selection of ear phone output,
and headphone sidetone adjustment controls.
As shipped from the factory, the AB-120 has its internal jumpers and
dip switches set to implement the Clear-Com party-line as described in
its respective section.
The unit is setup for sportscaster mode, option and the mic output level
is set for -10 dBu. The unit will operate on power from the intercom
line or from the external DC supply.
All of these jumpers and settings may need to be set depending on the
application of the unit.
To gain access to the internal options, remove the bottom cover by
unscrewing the four rubber feet. There is a diagram showing the switch
settings and jumper options attached to the inside of the bottom cover.
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
Figure 1-4: AB-120 Internal Options Diagram
1-7
Figure 1-5: AB-120 Jumper and Switch Locations
1-8
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
Jumper Options
There are eleven two position jumpers that provide many options for
the operation of the AB-120. To access these jumpers, remove the
bottom cover of the unit. Inside the bottom cover is a label describing
the functions of jumper and switch.
Note: Jumpers 2, 3, 4 and 6 are not used.
JP1
JP1 provides termination for the intercom line if needed. The AB-120 is
always a remote intercom station and therefore does not provide
termination for an intercom line. The termination is provided for the
cases where the party-line output of the AB-120 is not used and the
party-line drive circuit needs termination to be stable and not oscillate.
As shipped from the factory, the jumper is between pins 1 and 2 of JP1
making the termination inactive. To activate termination, place the
jumper between pins 2 and 3.
JP7
JP7 allows the send gain on the talkback channel to be increased
when driving a TW type intercom line, such as RTS. Placing the
jumper between pins 2 and 3 increases the send gain approximately 4
dB. JP7 is shipped from the factory with its jumper between pins 1 and
2, providing Clear-Com standard levels to the intercom line.
JP8
JP8 provides the selection of desired output level for the microphone
output.
JP9 and JP10
These JPs provide selection of the desired output level for the
microphone output.
JP11
JP11 selects the sportscaster or announcer modes of operation for the
front panel push button switches. Connection between pins 1 and 2
enables the sportscaster mode and connection between 2 and 3
enables announcer mode.
Microphone Output Pad
The microphone output connector on the rear panel can be internally
plugged into two different headers on the main PCB. Connecting the
output to J2 provides a high level of output. Connecting the output to
J3 adds a 30 dB pad in the series to provide a lower level output.
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
1-9
Dip Switch Selection of Earphone Output
Each earphone amplifier has an eight position dip switch providing a
selection of inputs to that amplifier. S2 is for the left ear and S3 is for
the right. Any or all of the inputs can be selected at the same time.
The following illustrates the function of each dip switch.
Figure 1-6: DIP Switch Settings for S2 and S3
It will be noted that each of the IFB inputs has two dip switches and
each has different gains associated with it. Dip switch 4 is for a 0 dB
input on the IFB channel. Dip switch 3 is for a lower level on the same
IFB input. If the IFB source is a balanced input or from a TW type
system, then the 0 dB setting should be used. If the IFB source is from
a Clear-Com Party-Line system, then the -15 dB setting is used.
Headphone Sidetone Adjustment
If either talkback channel is selected for listening in the headphone,
adjust R41 on the main PCB for the desired amount of talkback that is
to be heard in the earphone.
1-10
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
APPLICATION OF VARIOUS INTERCOM SYSTEM TYPES
The AB-120 is intended to work with virtually any intercom system.
Options, jumpers, and connectors have been provided for the following
systems.
• Clear-Com party-line
• TW party-line Systems (RTS)
• Other four wire systems
Clear-Com Party-Line
An all Clear-Com party-line system is described as follows:
IFB
IFB is provided by a PIC-4000 two channel IFB system containing
interrupt and non-interrupt functionalities.
INTERCOM
Talkback is provided from one channel of a Clear-Com party-line
system. This single channel is the producer channel. Any announcer
pressing the talkback button would speak into this channel. Any or all
of the announcers may talk at any time as they are summed on the
party-line channel.
Power
Power for the AB-120 is derived from the intercom line, an external DC
supply or optionally from the IFB line.
Figure 1-7: AB-120 Connected to a Clear-Com Party-Line System
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
1-11
Setting Jumpers
JP1 1-2 Unterminate intercom line
JP2 Not used
JP3 Not used
JP4 Not used
JP-5 1-2 Power intercom line
JP6 Not used
JP-7 1-2 Clear-Com Intercom Level
JP-8 Mic output Set per chart in a following section
JP-9 Mic Pre’p gain Set per chart in a following section
JP-10 Mic Pre’p gain Set per chart in a following section
JP-11 Mode Set per chart in a following section
Setting Dip Switches
S2 Left ear select S3 Right ear select
1 open 1 open
2 open 2 open
3 close 3 open
4 open 4 open
5 open 5 close
6 open 6 open
7 open 7 open
8 open 8 open
1-12
Wiring of Connectors
The pinout for the intercom XLR-3 connector is as follows:
• Pin 1 = ground
• Pin 2 = +30 volts power
• Pin 3 = intercom audio
The pinout for the IFB XLR-3F connector is as follows:
• Pin 1 = ground
• Pin 2 = IFB 2 and power
• Pin 3 = IFB 1
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
Figure 1-8: AB-120 Connected to a TW Party-Line System
TW Party-Line Systems (RTS)
A TW party-line system is described as follows:
IFB
IFB is provided by a two channel interrupt and non-interrupt system.
INTERCOM
Talkback is provided from one or two channels of a TW party-line
system Channel ‘1’ is the producer channel. Any announcer pressing
the talkback button would speak into this channel. Any or all of the
announcers may talk at any time as they are summed on the party-line
channel.
Set the channel switch on the rear panel to ‘1’. If the second power
option is installed, any announcer pressing the mute button can talk on
that channel.
POWER
Power for the AB-120 is derived from the intercom line, an external DC
supply or optionally from the IFB.
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
1-13
Channel Select Switch = ‘1’
Setting Jumpers
JP1 1-2 Unterminate intercom line
JP-5 1-2 Power intercom line
JP-7 2-3 RTS Intercom Level and JP1 on the option
board if used
JP-8 Mic output Set per chart in a following section
JP-9 Mic Pre’p
gain
JP-10 Mic Pre’p
gain
JP-11 Mute Set per chart in a following section
Set per chart in a following section
Set per chart in a following section
Setting Dip Switches
S2 Left Ear Select S3 Right Ear Select
1 open 1 open
2 open 2 open
3 close 3 open
4 open 4 open
5 open 5 close
6 open 6 open
7 open 7 open
8 open 8 open
1-14
Wiring of Connectors
The pinout for the intercom XLR-3 connector is as follows:
• Pin 1 = ground
• Pin 2 = intercom audio 1 and +30 volts power
• Pin 3 = intercom audio 2
The pinout for the IFB XLR-3F connector is as follows:
• Pin 1 = ground
• Pin 2 = audio 1
• Pin 3 = audio 2
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
2
INSTALLATION
The AB-120 is a versatile interconnection box and can accommodate
many types of installation. The AB-120 has two modes of operation;
sportscaster mode and announcer mode.
When shipped from the factory the AB-120 has its internal jumpers and
dip switches set to implement the Clear-Com party-line setup. The unit
will be configured for Sportscaster Console operation and the
microphone output level is set for -10 dBu with a dynamic microphone
input.
The AB-120 can operate on power from the intercom line or from a
suitable external DC power supply.
SPORTSCASTER MODE
MOMENTARY MICROPHONE MUTE
Place a jump jack on pins 1 and 2 of JP11. Both front panel buttons are
momentary in operation and microphone output is active except when
either of the buttons is pressed. The red LED next to the mute button is
light where the output is active.
Pressing the mute button turns the output of the microphone circuit off
as long as the button is pressed.
Pressing talkback turns the output of the microphone circuit off and
sends the signal to the intercom line. The green LED next to this button
is lit when the talkback circuit is activated.
ANNOUNCER MODE
LATCHING MICROPHONE
Place a jump jack on pins 2 and 3 of JP11. In this mode, the
microphone on/off button is latching in action and talkback is
momentary in action. The red LED next to the on/off button is lit
whenever the microphone output is active.
Pressing the on/off button toggles the state of the mic from on to off, or
vice versa, each time the button is pressed.
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
2-1
AB-120 SYSTEM BLOCK DIAGRAM
IFB
-IFB 2
-IFB
-SPARE
-SPARE
INPUT
DIP
SELECT
SWITCH
-INTERCOM A
-SPARE
-IFB 2
-IFB
-SPARE
-SPARE
POWER
POWER
CONSOLE
30 VOLT
STRIPPER
POWER
SUPPLY
LINE LEVEL OUT
PAD
30 DB
OPTIONAL
LINE LEVEL
GAIN SELECT
MUTE
INTERCOM
LOOPS THRU
CLEAR-COM/RTS
SELECT
A/B CHANNEL
(REAR PANEL)
GAIN
CC/RTS
INTERCOM 1
ADJUST
SIDETONE
-INTERCOM A
-SPARE
LEFT EAR
LIMITER
GAIN
SELECT
PREAMP
POWER
ELECTRET
HEADSET
1/2 6-PIN
CONNECTOR
SELECT
BAL/UNBAL
MUTE TALLY
LOGIC
TALKBACK
COUGH BUTTON
TALKBACK TALLY
LEFT VOLUME
AMPS
HEADSET
1/2 6-PIN
HEADSET
CONNECTOR
HEADPHONE
Figure 2-9: AB-120 Console Block Diagram
RIGHT EAR
30 VDC
RIGHT VOLUME
100-240 VAC
OUTPUT
2-2
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
3
SPECIFICATIONS
Note: 0 dBu is referenced to 0.775 V RMS
Headset Microphone Input
Input Type Dynamic, Electret
Input Impedance 1K Ohms
Max Input Level -60 dBu to -40 dBu switchable
Headset Output
Load Impedance >= 4 Ohms
Output Impedance 47 Ohms
Output Limiter Threshold -4 dBu ± 3 dB
Max Output Level before Distortion-4 dBu
Party Line Output
Off Noise <-80 dBu
Output Impedance >10K Ohms
Maximum Output -4 dBu
Party Line Input
Maximum Level before Clipping +3 dBu
Sidetone Null Capability >25 dB
Frequency Response
Dynamic Mic - Party Line 40Hz - 22KHz, ± 3 dB
Dynamic Mic - Line Out 20Hz - 22KHz, ± 3 dB
Dynamic Mic - 4-Wire Out 100Hz - 22KHz ± 3 dB
IFB Input - Headset Out 100Hz - 22KHz ± 3 dB
Party Line - Headset Out 150Hz - 22KHz ± 3 dB
Max Distortion
Dynamic Mic - Party Line <0.1%
Dynamic Mic - Line Out <0.05%
IFB Input - Headset Out <0.5%
Party Line - Headset out <0.1%
Noise
Dynamic Mic - Party Line <-75 dBu
Dynamic Mic - Line Out <-85 dBu
IDFB Input - Headset out <-65 dBu
Party Line - Headset Out <-65 dBu
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
3-1
Max Gain
Dynamic Mic - Party Line 41 dB ± 3 dB
Dynamic Mic - Hot Mic Out 40 dB ± 3 dB
IFB Input - Headset Out 40 dB/22 dB (switchable) ± 3 dB
Party Line - Headset Out 34 dB ± 3 dB
Rear Panel Connectors
Headset XLR-6F
Microphone Out XLR-3M
Intercom 2 XLR-3 (Male and Female Loop
through)
IFB XLR-3F
Power 2.1mm jack
Front Panel Controls and Indicators
(1) Mute button
(1) Mute indicator LED (red)
(1) Talk back button
(1) Talk back indicator LED (green)
(1) Interrupt level control
(1) Non-interrupt level control
POWER REQUIREMENTS
Intercom/IFB Voltage 25-30 VDC
Current 100mA idle, 120mA max
DC Adapter 100 - 240V
Voltage 30V @ 0.5A
PHYSICAL SPECS
Dimensions 6”W x 3”H x 8”D
(152mm x 76mm x 203mm)
Weight 2 lbs or 0.9 kg
Operating Temp Range 32 - 122°F (0 - 50°C)
Notice About Specifications
While Clear-Com makes every attempt to maintain the accuracy of the
information contained in its product manuals, that information is
subject to change without notice. Performance specifications included
in this manual are design-center specifications and are included for
customer guidance and to facilitate system installation. Actual
operating performance may vary.
3-2
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
4
GLOSSARY
Some of the terms used when discussing critical communications for
television or theatre may be new to you as they are unique to intercom
applications. Although many of the terms are common to other audio
applications, to be certain you understand their meanings we offer the
following definitions:
All Call: Ability to push one button from the main station and talk to all
channels at once on a multiple channel system.
Ambient Noise: Those background sounds that are not part of the
specific communication but are picked up by the microphone.
Selection of a good “noise-cancelling” mic will reduce ambient noise.
Beltpack: A portable electronics package worn on the belt or mounted
on a wall or other convenient location. Interconnects to system with
mic cable and is powered by a central power supply or main station.
Bridging, High Impedance (hi-Z): A method of connecting to an
audio line (such as Clear-Com) without loading or taking appreciable
power from that line. Simply stated, as you add more and more
stations to the line, the volume remains constant.
Call Signaling: This feature is included with the majority of
Clear-Com products. It is a visual indicator on a station (red light) used
to attract the attention of an operator who has removed the headset.
Channel vs. Station: A channel is the line that connects parties
together within a party line - it is a two-way talk path. For example, if
you have six people who need to hear one director, you have a
seven-station single-channel need. If the same director needs to speak
privately to any one of the six, add a second channel. You now have a
seven-station, two-channel system.
Closed-Circuit: Any intercom which is connected via cable (also
called hard-wired). The other type of intercom is wireless and is also
available from Clear-Com. However, if you want privacy and versatility,
you probably want a closed-circuit system or a combination of both.
Crosstalk: Leakage of audio transmissions from one channel to
another.
Dry Pair: A telephone term is used to describe a pair of wires (two
conductors) that carry audio but no voltage. Contrast this with a wet
pair that carries both audio and voltage.
Duplex: Duplex refers to bi-directional communications. Normal
communication between individuals talking face to face is “full duplex”;
in other words, you can talk and listen simultaneously. The other
alternative is “half-duplex,” such as a push-to-talk situation where one
Clear-Com Communication Systems
AB-120 Announcer Console Instruction Manual
4-1
station at a time can talk while others listen. A walkie-talkie is a good
example of half-duplex communication.
IFB: The term means “Interrupt Fold Back.” A fold-back is a monitor
system that allows, for example, talent to hear their voices or
musicians to hear their voices and instruments on stage. IFB (program
interrupt) disconnects the audio source while the talk button on the
main station is pushed.
ISO: A private conversation path. An ISO channel allows one to
simply push a button and transfer themselves and the person they
wish to speak with to an isolated channel.
Linking: Linking ties separate channels into one single party line.
Main Station: This is a product that includes both the ability to
communicate with multiple channels without connecting them together,
and to power all the stations connected to these channels.
Master Station: A remote station which needs AC power to operate.
Multi-Channel: More than one channel.
Party Line (P.L.): Intercom system in which all people talking on the
system can talk or listen to each other simultaneously. Also called
conferencing.
Point to Point: One path to one person.
Program: Audio source that is fed into the intercom channels.
Program Interrupt: Disconnects the audio source while the talk
button on the main station is pushed (IFB).
Remote Mic Kill (RMK): The ability for certain main stations to shut
off all microphones on beltpacks in a system.
Remote Station: Like the beltpack, this would be any of the products
connected to the intercom line that allow duplex or half-duplex
conversation, but do not contain a power supply.
Sidetone: This is your own voice heard in your earphone as you are
speaking.
Stage Announce (SA): Redirects output of the main station's
microphone to an external destination (such as a PA system).
Station: A station is connected to one or more channels. For example,
if you have six people who need to hear one director, you have a
seven-station single-channel need. If the same director needs to speak
privately to any one of the six, add a second channel. You now have a
seven-station, two-channel system.
Termination: Passive network that is connected in each channel,
usually on the power supply or main station.
4-2
AB-120 Announcer Console Instruction Manual
Clear-Com Communication Systems
LIMITED WARRANTY
This document details the Clear-Com Standard Limited Warranty for all new products for sale within all
regions with the exception of Military, Aerospace, and Government (MAG).
EXCEPT AS SET FORTH HEREIN ("LIMITED WARRANTY"), CLEAR-COM MAKES NO OTHER
WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION ANY
WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT OF THIRD PARTY RIGHTS, OR
FITNESS FOR A PARTICULAR PURPOSE, ALL OF WHICH ARE EXPRESSLY DISCLAIMED.
1. Standard Limited Warranty.
Clear-Com Communication Systems ("Clear-Com") warrants its
products, including supplied accessories, against defects in material or workmanship for the time
periods as set forth below provided it was purchased from an authorized Clear-Com dealer or
distributor.
a) Pursuant to this Limited Warranty, Clear-Com will, at its option:
i) repair the product using new or refurbished parts, or;
ii) replace the product with a new or refurbished product.
b) Remedies: In the event of a defect, the rights detailed in 1 (a) are your exclusive remedies. For
purposes of this Limited Warranty, "refurbished" means a product or part that has been returned
to its original specifications.
c) Standard Warranty Period (by Product):
i) All Clear-Com brand systems and products, including belt packs, have a Limited Warranty
of two years, with the exception of;
(1) Cables, accessories, components & consumable items have a Limited Warranty of 90
days.
(2) Any Clear-Com product that has been classified as obsolete at the time of sale has a
Limited Warranty of 90 days from sales and will be replaced with the same product or a
sales credit will be issued, at the sole discretion of Clear-Com.
(3) Headsets, handsets, microphones, and associated spare parts, as well as UHF wireless
IFB products, have a Limited Warranty of one year.
(4) UHF WBS Analog wireless intercom systems have a Limited Warranty of three years.
Clear-Com Communication Systems
Standard Limited Warranty
i
(5) All software products, including Concert (Client and Server), ECS, Production Maestro
and Logic Maestro are warranted for one year and shall substantially conform to
published specifications. The media on which the Software is furnished is warranted to
be free of defects in material and workmanship (under normal use) for a period of one
year.
(6) Any Clear-Com products that are listed within the last time buy period have the same
Limited Warranty for their type 1.i 1 - 1.i.5 as above.
d) Any Clear-Com product that is repaired or supplied as a replacement under the terms of this
Limited Warranty shall inherit the remaining warranty period from the original product.
e) Standard Warranty Period Start Date
i) Dealer / Distributor Sales: In view of Dealer or Distributor stocking practices, the Standard
Warranty Period for products sold through Dealers or Distributors will commence from the
Clear-Com invoice date and will include an automatic extension of three months. Any valid
warranty claim within the Standard Warranty Period as determined by the Clear-Com
invoice date will be covered without further supporting evidence. All warranty claims after
this date must be supported by the Customer's proof of purchase that demonstrates the
product is still within the Standard Warranty Period (as detailed in Section 1.c.i above, plus
the automatic three month extension) from their purchase date.
ii) Direct Sales: The Standard Warranty Period will commence from the date the product was
shipped from Clear-Com to the Customer. The Standard Warranty Period start date for
contracts that include commissioning will be the date of the Site Acceptance Test (SAT) or
one month from conclusion of the commissioning project, whichever is earlier.
f) Invalidation of Warranty
i) This Limited Warranty shall be invalidated if the product's outer case has been opened and
internal modifications have been made or damage has occurred, or upon the occurrence of
other damage or failure not attributable to normal wear and tear. Authorized modifications
with Clear-Com's express written permission will not invalidate the warranty.
g) Software Updates
i) Software Updates are released periodically to correct discovered program bugs. During the
Warranty Period, software updates are available to Customers free of charge.
ii
Clear-Com Communication Systems
Standard Limited Warranty
h) Software Upgrades
i) Software Upgrades include new Features and/or Functional Enhancements and are not
included as part of the Standard Warranty but may be purchased at the published rates.
ii) Note: In the absence of a Software Update containing a program correction and no
available workaround to mitigate the problem, at the discretion of Service, Sales,
Engineering, or Product Management, the Customer may be provided a Software Upgrade
under warranty.
2. Exclusions.
Services do not cover damage or failure caused by any occurrence beyond Clear-Com's
reasonable control, including without limitation acts of God, fire, flooding, earthquake, lightning, failure
of electric power or air conditioning, neglect, misuse, improper operation, war, government
regulations, supply shortages, riots, sabotage, terrorism, unauthorized modifications or repair, strikes,
labor disputes or any product failure that Clear-Com determines is not a result of failure in the
Services provided by Clear-Com. Further Services excluded from this Agreement include: services
required due to errors or omissions in Customer purchase orders; installation or maintenance of
wiring, circuits, electrical conduits or devices external to the products; replacement or reconditioning
of products which, in Clear-Com's opinion cannot be reliably maintained or properly serviced due to
excessive wear or deterioration; Customer's failure to maintain the installation site in accordance with
the environmental specifications of the products; or service on products removed from the location
originally specified by Customer and/or reinstalled without the prior written approval of Clear-Com.
Customer will pay Clear-Com's then current published charges to restore such Covered Products to a
condition eligible for further service under this Agreement. Clear-Com shall be excused from and shall
not be liable for any failure or delay in performance under this Agreement due to the foregoing or any
causes beyond its reasonable control.
3. Limitation of Liability.
IN NO EVENT WILL CLEAR-COM BE LIABLE UNDER THIS AGREEMENT
FOR ANY INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING
WITHOUT LIMITATION LOST PROFITS), REGARDLESS OF THE FORM OF ACTION, EVEN IF
ADVISED IN ADVANCE OF THE POSSIBILITY OF SUCH DAMAGES.
4. Assignment.
Neither party may assign this Agreement or any portion thereof without the prior written
consent of the other, except in the event of a merger, sale of all or substantially all of the assets or
other corporate reorganization.
5. Ownership of replaced parts or product.
All replaced parts or products become the property of
Clear-Com.
6. Entire Agreement.
This Agreement constitutes the entire agreement between the parties with
respect to the subject matter hereof, and supersedes all prior or contemporaneous proposals, oral or
written, and all other communications between them relating to the subject matter of this Agreement.
Clear-Com Communication Systems
Standard Limited Warranty
iii
iv
Clear-Com Communication Systems
Standard Limited Warranty
TECHNICAL SUPPORT & REPAIR POLICY
NOVEMBER 1, 2008
In order to ensure that your experience with Clear-Com and our World Class products is as beneficial,
effective and efficient as possible, we would like to define the policies and share some "best practices"
that can accelerate any problem solving processes which we may find necessary and to enhance your
customer service experience. Our Technical Support, Return Material Authorization, and Repair Policies
are set forth below. These Policies are subject to revision and constantly evolve in order to address our
Customers' and the Market's needs. Accordingly these are provided by way of guidance and for
information only and may be changed at anytime with or without Notice.
TECHNICAL SUPPORT POLICY
a) Telephone, online, and e-mail technical support will be provided by the Customer Service Center
free of charge during the Warranty Period.
b) Technical support will be provided free of charge for all software products under the following
conditions:
i) The application, operating, and embedded software is installed on a product covered by
Clear-Com's Limited Warranty, and:
(1) The software is at the current release level; or,
(2) The software is one (1) version removed from current.
ii) Older versions of software will receive "best-effort" support, but will not be updated to
correct reported bugs or add requested functionality.
c) For Technical Support:
i) North and South America, (inc. Canada, Mexico, and the Caribbean) & US Military:
Hours: 0800 - 1700 Pacific Time
Days: Monday - Friday
Tel: +1 510 337 6600
Email: CustomerServicesUS@vitecgroup.com
ii) Europe, the Middle East and Africa:
Hours: 0800 - midnight Central European Time
Clear-Com Communication Systems
Technical Support & Repair Policy
v
Days: Monday - Friday
Tel: +49 40 853 999 700
Email: TechnicalSupportEMEA@vitecgroup.com
iii) Asia-Pacific:
Hours: 0800 - 1700 Pacific Time
Days: Monday - Friday
Tel: +1 510 337 6600
Email: CustomerServicesAPAC@vitecgroup.com
d) Email Technical Support is available for all Clear-Com branded products free of charge for the life
of the product, or two years after a product has been classified as obsolete, whichever comes
first.
e) Support for Distributor and Dealer Sales
i) Distributors and Dealers may utilize the Customer Service Centers once a system has been
installed and commissioned. Clear-Com Systems and Applications Engineers will provide
support to the Distributor from the pre-sales stage through to satisfactory installation for new
system purchases. Customers will be encouraged to contact their Dealer or Distributor with
their installation and technical support enquires rather than using the Customer Service
Centers directly.
f) Support for Direct Sales
i) Customers may utilize the Customer Service Centers once a system has been installed and
commissioned by Clear-Com Systems and Applications Engineers, or in the case of project
installations, once the Project Team has completed the hand-over to the Support Centers.
RETURN MATERIAL AUTHORIZATION POLICY
a) Authorizations: All products returned to Clear-Com or a Clear-Com Authorized Service Partner
must be identified by a Return Material Authorization (RMA) number.
b) The Customer will be provided with an RMA number upon contacting Clear-Com Sales Support
as instructed below.
c) The RMA number must be obtained from Clear-Com via phone or email prior to returning product
to the Service Center. Product received by the Service Center without a proper RMA number is
subject to return to the Customer at the Customer's expense.
vi
Clear-Com Communication Systems
Technical Support & Repair Policy
d) Damaged equipment will be repaired at the Customer's expense.
e) Returns are subject to a 15% restocking fee.
f) Advance Warranty Replacements (AWRs);
i) During the first 30 days of the Standard Warranty Period: Once the equipment fault has
been verified by Clear-Com or its authorized representative, Clear-Com will ship a new
replacement product. The Customer will be provided with an RMA number and be required
to return the faulty equipment within 14 days of receipt of the replacement or will be invoiced
for the list price of a new product.
ii) During days 31-90 of the Standard Warranty Period: Once the equipment fault has been
verified by Clear-Com or its authorized representative, Clear-Com will ship a like-new, fully
refurbished replacement product. The Customer will be provided with an RMA number and
be required to return the faulty equipment within 14 days of receipt of the replacement or will
be invoiced for the list price of a new product.
iii) To obtain an RMA number or request an AWR:
(1) North and South America, Asia-Pacific, and US Military:
Hours: 0800 - 1700 Pacific Time
Days: Monday - Friday
Tel: +1 510 337 6600
Email: SalesSupportUS@vitecgroup.com
(2) Europe, the Middle East and Africa:
Hours: 0800 - 1700 GMT + 1
Days: Monday - Friday
Tel: + 44 1223 815000
Email: SalesSupportEMEA@vitecgroup.com
iv) Note: AWRs are not available for UHF WBS Analog wireless intercom systems. UHF WBS
Analog wireless intercom systems out-of-box failures must be returned to Alameda for
repair.
v) Note: Out-of-box failures returned after 90 days will be repaired and not replaced unless
approved by Clear-Com Management.
vi) Note: AWRs are not available after 90 days of receipt of product unless an AWR Warranty
Extension is purchased at the time of product purchase.
Clear-Com Communication Systems
Technical Support & Repair Policy
vii
vii) Note: Shipping charges, including duties, taxes, and insurance (optional), to Clear-Com's
factory is the responsibility of the Customer. Shipping AWRs from Clear-Com is at
Clear-Com's expense (normal ground or international economy delivery). Requests for
expedited shipping (E.g. "Next-Day Air") and insurance are the responsibility of the
Customer.
REPAIR POLICY
a) Repair Authorizations: All products sent to Clear-Com or a Clear-Com Authorized Service Partner
for repair must be identified by a Repair Authorization (RA) number (see above).
b) The Customer will be provided with an RA number upon contacting Clear-Com Customer
Services as instructed below.
c) The RA number must be obtained from Clear-Com via phone or email prior to returning product to
the Service Center. Product received by the Service Center without a proper RA number is
subject to return to the Customer at the Customer's expense.
d) Return for Repair
i) Customers are required to ship equipment at their own cost (including transportation,
packing, transit, insurance, taxes and duties) to Clear-Com's designated location for repair.
(1) Clear-Com will pay for the equipment to be returned to the Customer when it is repaired
under warranty.
(2) Shipping from Clear-Com is normal ground delivery or international economy.
Requests for expedited shipping (E.g. "Next-Day Air") and insurance are the
responsibility of the Customer.
ii) Clear-Com does not provide temporary replacement equipment ("loaner") during the
period the product is at the factory for repair. Customers should consider a potential
prolonged outage during the repair cycle, and if required for continuous operations
purchase minimum spare equipment required or purchase an AWR Warranty Extension.
iii) No individual parts or subassemblies will be provided under warranty, and warranty repairs
will be completed only by Clear-Com or its Authorized Service Partners.
viii
iv) Customers requesting a non-warranty repair will be provided an estimate of the total repair
cost prior to the return of the equipment. In the event that Clear-Com is unable to estimate
Clear-Com Communication Systems
Technical Support & Repair Policy
the cost of repair, the Customer may elect to return the product to the factory for an
estimate. The Customer is responsible for shipping costs both to and from the factory in the
event they choose not to accept the estimate.
v) The Customer must provide either a purchase order for the repair work, or will be required
to make an advance payment (as a debit against the Dealer's line of credit, or credit card)
prior to the repaired product being returned to the Customer.
vi) For requesting a Repair Authorization number:
(1) North and South America, Asia-Pacific, and US Military:
Hours: 0800 - 1700 Pacific Time
Days: Monday - Friday
Tel: +1 510 337 6600
Email: CustomerServicesUS@vitecgroup.com
(2) Europe, the Middle East and Africa:
Hours: 0800 - midnight Central European Time
Days: Monday - Friday
Tel: +49 40 853 999 700
Email: TechnicalSupportEMEA@vitecgroup.com
vii) Note: Clear-Com's Limited Warranty does not cover normal wear and tear. The Customer
will be charged the full cost of the repair if their equipment has been tampered with by
non-approved personnel, or has been subject to damage through electrical failure, liquid
damage or mishandling. The Customer Service Center will provide the Customer with a
cost estimate for any such repairs prior to undertaking the work.
Clear-Com Communication Systems
Technical Support & Repair Policy
ix
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