Telex Audiocom US-2002 User manual

US2002
Listen Listen
Call
Talk
Talk
Call
Mic Kill
®
Volume
AllTalk
PA
Headset
Panel Mic
Mic
User Instructions
US-2002
Intercom User Station
9350-7748-000 Rev C 09/2009

PROPRIETARY NOTICE
The product information and design disclosed herein were originated by
and are the property of Bosch Security Systems, Inc. Bosch reserves all
patent, proprietary design, manufacturing, reproduction, use and sales
rights thereto, and to any article disclosed therein, except to the extent
rights are expressly granted to others.
COPYRIGHT NOTICE
Copyright 2009 by Bosch Security Systems, Inc. All rights reserved.
Reproduction, in whole or in part, without prior written permission from
Bosch is prohibited.
WARRANTY NOTICE
See the enclosed warranty card for further details.
CUSTOMER SUPPORT
Technical questions should be directed to:
Customer Service Department
Bosch Security Systems, Inc.
12000 Portland Avenue South
Burnsville, MN 55337 USA
Telephone: [phone]
Fax: [phone]
Factory Service: 800-553-5992
RETURN SHIPPING INSTRUCTIONS
Customer Service Department
Bosch Security Systems, Inc. (Lincoln, NE)
Telephone: [phone]
Fax: [phone]
Factory Service: 800-553-5992
Please include a note in the box which supplies the company name,
address, phone number, a person to contact regarding the repair, the type
and quantity of equipment, a description of the problem and the serial
number(s).
SHIPPING TO THE MANUFACTURER
All shipments of product should be made via UPS Ground, prepaid (you
may request from Factory Service a different shipment method). Any
shipment upgrades will be paid by the customer. The equipment should
be shipped in the original packing carton. If the original carton is not
available, use any suitable container that is rigid and of adequate size. If
a substitute container is used, the equipment should be wrapped in paper
and surrounded with at least four (4) inches of excelsior or similar shock-
absorbing material. All shipments must be sent to the following address
and must include the Proof of Purchase for warranty repair. Upon
completion of any repair the equipment will be returned via United
Parcel Service or specified shipper, collect.
Factory Service Department
Bosch Security Systems, Inc.
8601 East Cornhusker Hwy.
Lincoln, NE 68507 U.S.A.
Attn: Service
FCC STATEMENT
This equipment uses and can radiate radio frequency energy that may
cause interference to radio communications if not installed in accordance
with this manual. The equipment has been tested and found to comply
with the limits of a Class A computing device pursuant to Subpart J, Part
15 of FCC Rules which are designed to provide reasonable protection
against such interference when operated in a commercial environment.
Operation of this equipment in a residential area may cause interference
which the user (at his own expense) will be required to correct.
This product meets Electromagnetic Compatibility
Directive 89/336/EEC.

Table
of
Contents
INTRODUCTION ............................................................................................................................................................................................3
What’s New with the US-2002 .......................................................................................................................................................................3
Description ....................................................................................................................................................................................................3
Features .........................................................................................................................................................................................................4
Reference Descriptions ..................................................................................................................................................................................5
INSTALLATION ..............................................................................................................................................................................................7
Unpacking .....................................................................................................................................................................................................7
Configuration Pre-check ...............................................................................................................................................................................7
Headset Microphone Type Selection Dip Switch ..........................................................................................................................................9
Mic Kill Send Enable DIP Switch .................................................................................................................................................................9
Program Interrupt DIP Switches ................................................................................................................................................................10
Monaural or Binaural Operation DIP Switches ......................................................................................................................................... 10
Balanced / Unbalanced Switch (SW2) ......................................................................................................................................................... 11
Direct Program Listen Enable / Disable Jumpers ...................................................................................................................................... 11
Mounting Configurations ............................................................................................................................................................................ 12
Connections ................................................................................................................................................................................................. 13
CENTRAL MASTER STATION VS. REMOTE STATION ...................................................................................................................................... 13
ALL LOCALLY POWERED STATIONS ............................................................................................................................................................ 13
EXTERNAL PROGRAM INPUT AND PA OUTPUT ........................................................................................................................................... 13
ES-4000A EXPANSION STATION CONNECTION (OPTIONAL COMPONENT) ................................................................................................... 13
Cables .......................................................................................................................................................................................................... 13
OPERATION ..................................................................................................................................................................................................27
Power-Up Check ......................................................................................................................................................................................... 27
Test Tone ..................................................................................................................................................................................................... 27
Sidetone Adjustment .................................................................................................................................................................................... 28
Voice-Activated Microphone Setup ............................................................................................................................................................. 29
Operation ..................................................................................................................................................................................................... 29
NORMAL VS. PROGRAMMING MODE ........................................................................................................................................................... 29
VOLUME ADJUSTMENT ............................................................................................................................................................................... 29
RECEIVING CALLS ...................................................................................................................................................................................... 30
CALLING AN INTERCOM CHANNEL .............................................................................................................................................................. 30
MICROPHONE MUTE DURING TALK ........................................................................................................................................................... 30
ALL TALK ................................................................................................................................................................................................... 30
PUBLIC ADDRESS ....................................................................................................................................................................................... 31
TURNING THE PROGRAM INPUTS ON AND OFF ............................................................................................................................................ 31
USING MIC KILL ........................................................................................................................................................................................ 31
USING VOICE-ACTIVATED MICROPHONE (VOX) ........................................................................................................................................ 32
INCOMING CALL BEEP ON/OFF ................................................................................................................................................................. 32
Specifications ...............................................................................................................................................................................................33
Quick Reference .......................................................................................................................................................................................... 35

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CHAPTER 1
Introduction
Thank you for purchasing the Audiocom US-2002 Intercom User Station. We hope the many design features of this product
will satisfy your intercommunication requirements for many years to come. To get the most out of your new intercom stations,
please take a few moments to look through this booklet before using the US-2002 for the first time.
What’s New with the US-2002
•New internal mechanical design in the panel mic to standardize and improve connections.
•Updated gooseneck mic plug connection from a pin connector to a stereo plug for easy installation.
•The Telex model MCP-90-XX microphone replaces the EGM-12N and EGM-18N microphone.
Description
The US-2002 Intercom User Station is designed for stationary use by personnel who may require selective access to two or
more intercom channels. It can be rack mounted or used as a desktop station. For rack mounting, optional hardware is required.
For desktop use the four rubber feet supplied.
The US-2002 can be used as a simple, multi-channel user station. Typically, in this application, no program sources or public
address output are connected and some advanced features can be disabled: the station simply provides talk, listen and call
capability for a single user. Alternatively, the US-2002 can function as a master station. In this configuration, most or all
advanced features are activated. Also, program inputs and public address output may be connected. This configuration is ideal
for command and control personnel such as directors, supervisors, etc.
The basic US-2002 can communicate with two (2) intercom channels. The number of channels can be increased by connecting
optional ES-4000A Expansion Stations. Each ES-4000A adds four (4) additional channels, and up to four (4) of these
expansion stations can be connected together for a total of eighteen channels.

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Features
FIGURE 1. US-2002 Reference View (See “Reference Descriptions” on page 5.)

5
Reference Descriptions
1. Dynamic-Mic Headset Connector - Accepts headset with monaural headphones and either balanced or
unbalanced dynamic microphones.
2. Panel Mic/Electret Mic Headset Connector - Accepts an electret gooseneck microphone, such as the Telex Model
MCP-90-XX. The Model MCP-90 series panel mic connector is a 1/4”
stereo plug, with a threaded shaft for easy installation.
3. Volume Control - Adjusts headphone volume only. If an external speaker is used, volume is
adjusted at the speaker.
4. VOX Trimmers - Used with the voice-activated microphone feature. Separate trimmers
adjust the voice activation level for the headset and panel microphones.
5. Headset and Panel Mic keys - Used to manually activate either the headset or panel microphone,
whichever is being used.
6. All Talk Key - Used to talk to all stations that are listening on all channels. This includes
both US-2002 channels and any connected ES-4000A Expansion
Stations.
7. PA Key - This key is used to talk over the public address system if a US-2002 is
connected to a public address system, .
8. Mic Kill Key - Used to turn off the microphones on any intercom station on a channel.
Also used to activate the program inputs and the audible beep feature.
9. Intercom Talk Keys - Allows momentary or latching (hands-free) operation possible.
10. Call Keys - Used to place calls on intercom channels and to indicate calls.
11. Intercom Listen Keys - Allows momentary or latching operation possible.
12. Program Inputs Connector and Trimmers - Each intercom channel has its own program input and level adjust
trimmers. The program inputs may be turned on or off via the front panel
and they may be set to interrupt during talk, if desired.
13. Local Power Jack - Powers the US-2002 from an AC outlet, instead of being powered from
the intercom channels with the use of an optional PA-KP local power
supply.
14. PA Output - Connects to a public address system.
15. Expansion Out Connector - Connects to an ES-4000A Expansion Station
16. Speaker Output Jacks - A single powered loudspeaker or dual powered loud speakers may be
connected for monaural or binaural listening.
17. Intercom Channel Connectors and
Audiocom/Clear-Com Selector Switch - Sets the US-2002 for compatibility with either Audiocom or Clear-Com channel connector pin outs, channel power requirements, and call
signaling requirements.

6

7
CHAPTER 2
Installation
Unpacking
The package contains the following items.
NOTE: Contact the shipper or your Audiocom dealer immediately if anything is damaged or missing.
Configuration Pre-check
Before connecting the US-2002 ensure it is properly configured for your intended usage. Figure 2 on page 8 shows the
configuration jumpers and switches locations.
To access internal switches and jumpers, do the following:
1. Remove one (1) screw from the top cover.
2. Remove three (3) screws from each side.
NOTE: Switch SW2 can be accessed through the back panel. If you change any switch settings while the US-2002 is
operating, you must perform a reset: either cycle power off then on, or simultaneously press the All Talk and
Listen 1 keys, then release them. The sidetone controls are adjusted after power-up and are normally
accessed through the bottom cover.
Quantity Description
1 US-2002 Intercom Station
1 Warranty and Registration Card
1 User Manual
4 Rubber feet for desktop use of the US-2002
1 Termination plug for special applications (Figure 13 on page 24)

8
FIGURE 2. Locations of Configuration Jumpers and Switches
TABLE 1. Configuration Switch Settings
SWITCH NUMBER DESCRIPTION SETTINGS DEFAULT SETTINGS
DIP Switch SW1 (Internal)
SW1-1 Headset microphone type On: Unbalanced
Off: Balanced (typical) Off
SW1-2 Call signal send, channel 1 On: Enabled
Off: Disabled On
SW1-3 Call signal receive, channel 1 On: Enabled Off: Disabled On
SW1-4 Call signal send, channel 2 On: Enabled Off: Disabled On
SW1-5 Call signal receive, channel 2 On: Enabled Off: Disabled On
SW1-6 Mic Kill signal send On: Enabled Off: Disabled Off
SW1-7 Program 2 interrupt On: Interrupt during talk
Off: No Interrupt Off
SW1-8 Program 1 interrupt On: Interrupt during talk
Off: No Interrupt Off
Push-button Switch SW2 (BAL-UNBAL switch on Back Panel)
Audiocom or Clear-Com operation Out: Audiocom (balanced)
In: Clear-Com Unbalanced. Out
Dip Switch SW3 (internal)
SW3-1 Incoming call beep On: Disabled
Off: Enabled Off

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Headset Microphone Type Selection Dip Switch
SW1-1 applies only to a dynamic-mic headset connected to the dynamic-mic headset jack on the front panel. If the headset
specifications indicate the microphone type is balanced, or if you are unsure, leave this switch in the off (default) position. If
the specifications indicate an unbalanced microphone set SW1-1 to on.
NOTE: For best results in noisy environments, a noise canceling (directional or carotid) microphone is highly
recommended. This is especially true if you are using the VOX feature.
Mic Kill Send Enable DIP Switch
The US-2002 can generate an inaudible signal that turns off the microphones on all intercom stations on a channel (for stations
that detect this signal). This feature is useful, for example, when an unattended microphone has been left on and is causing
unnecessary noise on a channel. By default, Mic Kill is not enabled.
To activate this feature, do the following:
> Set SW1-6 to the on position.
SW3-2 Listen 1 to speaker 1 only On: Enabled (Binaural)
Off: Disabled (Monaural) On
SW3-3 Incoming call beep, speaker 1 On: Enabled (SW3-1 must be
off)
Off: Disabled Off
SW3-4 Incoming call beep, speaker 2 On: Enabled (SW3-1 must be
off)
Off: Disabled Off
SW3-5 Listen 2 to right headphone On: Enabled (Binaural)
Off: Disabled (Monaural) On
SW3-6 Listen 2 to speaker 2 On: Enabled (Binaural)
Off: Disabled (Monaural) On
SW3-7 Listen 2 to speaker 1 On: Enabled (Binaural)
Off: Disabled (Monaural) Off
SW3-8 Listen 1 to left headphone On: Enabled (Binaural)
Off: Disabled (Monaural) On
IMPORTANT: Set all to monaural or all to binaural. Do not mix settings.
TABLE 1. Configuration Switch Settings
SWITCH NUMBER DESCRIPTION SETTINGS DEFAULT SETTINGS

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Program Interrupt DIP Switches
If you plan to use the external program sources with the US-2002, you have a choice of whether or not you want the program
audio to shut off on the intercom channel while you are talking.
By default, program audio does not interrupt during talk. You can change this as follows:
•For channel 1 program interrupt during talk, set SW1-7 to on.
•For channel 2 program interrupt during talk, set SW1-8 to on
If call signal receive is enabled (switches SW1-3 and SW1-5), incoming calls are indicated by red-flashing call keys. An
optional beep tone can also be used. Internal switches enable the beep tone. You can then turn the beep tone on or off via the
front panel during normal operation.
To enable the beep tone, do the following:
1. Verify the call signal receive DIP switches are on (SW1-3 and SW1-5).
2. For an incoming call beep in a headset, set SW3-1 to off.
3. For an incoming call beep in speaker 1, set SW3-1 to off and SW3-3 to on.
4. For an incoming call beep in speaker 2, set SW3-1 to off and SW3-4 to on.
NOTE: The procedure for turn incoming call beep on or off during operation can be found on page 32.
Monaural or Binaural Operation DIP Switches
The US-2002 can be used with a single speaker or monaural headphones (single- or double-sided) for monaural operation. In
this case, all audio signals are combined and sent to the headphones and the Speaker 1 jack on the back panel. The US-2002
can also be used with two speakers for binaural operation. In this case, channel 1 is sent to the Speaker 1 jack and channel 2 is
sent to the Speaker 2 jack. Binaural headphone operation is not supported.
For Monaural operation with headphones or one speaker (factory default):
•Set SW3-2 to off.
•Set SW3-5 to on.
•Set SW3-6 to off.
•Set SW3-7 to on.
•Set SW3-8 to on.
For binaural operation with 2 speakers:
•Set SW3-2 to on.
•Set SW3-5 to off.
•Set SW3-6 to on.
•Set SW3-7 to off.
•Set SW3-8 to off.

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Balanced / Unbalanced Switch (SW2)
This switch is set at the factory to the balanced (BAL) position for use with Audiocom intercom channels.
To set the unit to Clear-Com mode, do the following:
> Set the switch to the unbalanced (UNBAL) position for use with Clear-Com intercom systems.
Direct Program Listen Enable / Disable Jumpers
By default, each US-2002 program input can be heard by all intercom stations that are listening on the corresponding intercom
channel. This includes the US-2002. Program input routing to the intercom channels can be turned on or off via the US-2002
front panel programming. See “External Program Input and PA Output” on page 13. Additionally, all program signals can be
routed directly to the US-2002 speaker or headset. This lets the US-2002 operator hear the program inputs even if they are not
being routed to the intercom channels.
To disable direct program listening in the speaker or headset for one or more program inputs, do the following:
> Reset the appropriate jumper as shown in Table 2 .
Jumper Description Setting for Jumpers
J3 Program 1 direct to Headset or Speaker Pins 2 & 3 shorted: Enabled
Pins 1 & 2 shorted: Disabled
J6 Program 2 direct to Headset or Speaker
TABLE 2. Direct Program Listen Enable/Disable Jumpers

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Mounting Configurations
The US-2002 can be used on a desktop, or it can be rack mounted. For desktop use, install the four (4) rubber feet supplied
with the US-2002. For rack mounting, use optional Audiocom RMK Rack Mount Kits (Figure 3).
NOTE: You will have to perform the sidetone adjustment (See “Sidetone Adjustment” on page 28) after all components
are connected. However, when the US-2002 is rack mounted, you may not be able to access the sidetone
trimmers. In this case, you can position the US-2002 in the rack and make all required connections. Then, adjust
the sidetone trimmers before installing and tightening all rack mount screws.
FIGURE 3. Audiocom RMK Rack Mount Kits

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Connections
Central Master Station vs. Remote Station
The US-2002 can be used in a variety of configurations as a speaker station or as a headset station. Additionally, it can be used
as a central master station or as a remote station. When used as a central master station, the US-2002 is placed in the same
location as the system power supplies, and if an SPS2001 power supply is used, the US-2002 can take advantage of the
SPS2001 built-in speaker for speaker output. When used as a remote station, a separate speaker must be supplied. Figures 4
through 12, starting on page 15, illustrate several configurations for the US-2002 when used as a central or remote headset or
speaker station.
All Locally Powered Stations
Any US-2002 can be locally powered by connecting a PS-KP Local Power Supply. This is shown as an option in Figures 4
through 12. A special case is an intercom system where all stations are powered from local power supplies, with no central
power supply. This is illustrated in Figure 13 on page 24.
External Program Input and PA Output
Connections for external program input and PA output are show in Figure 14 on page 25.
ES-4000A Expansion Station Connection (Optional Component)
REFERENCE: Refer to the ES-4000A User Instruction Manual (P/N 9350-7551-000) for detailed connection information.
Cables
The numbers below correspond to the cable number in the connection drawings on the following pages.
1. 1-channel intercom cable. Sold separately. Use Bosch “ME” cables, below. Or, build per Figure 15 on page 26.
ME-25: 25’ (7.6 m) cable with Male and Female 3-pin XLR connectors.
ME-50: 50’ (15.2 m) cable with Male and Female 3-pin XLR connectors.
ME-100: 100’ (30.4 m) cable with Male and Female 3-pin XLR connectors.
When connecting from a power supply to a TW-7W, keep cables as short as possible. Also, heavier gage
wire is recommended.
2. 2-channel intercom cable. Sold separately. Use Telex “ME/2” cables, below. Or, build per Figure 15 on page 26.
ME-25: 25’ (7.6 m) cable with Male and Female 6-pin XLR connectors.
ME-50: 50’ (15.2 m) cable with Male and Female 6-pin XLR connectors.
ME-100: 100’ (30.4 m) cable with Male and Female 6-pin XLR connectors.
3. Y adapter cable. Sold separately. Use Bosch CA-23-16. Or, build per Figure 15 on page 26.
4. 3ft. (0.91m) speaker cable with RCA plugs. One (1) supplied with each SPS-2001 SPK-2000.
5. 18” (457 mm) EXP IN/OUT cable, stereo miniplug to stereo miniplug. One (1) supplied with each ES-4000A.
6. 18” (457 mm) channel output cable, 15-pin Male Dsub to 15-pin Male Dsub. One supplied with each ES-4000A.
(Optional component. See ES-4000A User Manual for connection information.)
7. Shielded patch cable, 9-pin Male Dsub to 9-pin Female Dsub.
NOTE: Available at most electronic stores.
CAUTION:All pins must be connected straight through: do not use a RS232 computer cable.

14
8. Shielded patch cable, stereo miniplug to stereo miniplug.
NOTE: Available at most electronic stores.
9. Shielded audio cable. Must have male 3-pin XLR connector at one end for connection to the XP-USPG or XP-4PGM
program inputs. Pin out for program inputs is as follows:
Pin 1: common
Pin 2: + program input
Pin 3: - program input
10. Shielded audio cable. Must have male 3-pin XLR connector at one end for connection to the XP-USPG PA output.
Pin out for PA output is as follows:
Pin 1: common
Pin 2: + PA output
Pin 3: - PA output
11. 18” (457 mm) channel output cable, 15-pin Male Dsub to 15-pin Female Dsub. One (1) supplied with each
XP-ES4000.
REFERENCE: For more information, see ES-4000A User Manual [P/N 9350-7551-000] for connection information.

15
The configuration, shown in Figure 4, is suitable for a smaller intercom system when you want to operate the US-2002 as a
master speaker station, with one (1) speaker to monitor both intercom channels. In this configuration, the SPS-2001
Combine/Isolate switch is set to the Isolate position. With this setting, the two (2) intercom channels are completely separated.
The amplified speaker in the SPS2001 is used as the speaker output for the US-2002, and the US-2002 dip switches are set to
monaural operation so that both intercom channels are heard in the speaker. The PA-KP local power supply is optional. When
a PA-KP is connected, the US-2002 automatically disconnects from system power (supplied by the SPS2001). When the US-
2002 is not drawing power from the intercom system, more system power is available for additional belt packs, etc.
NOTE: For more information about cables, see Figure 15 on page 26.
NOTE: A BOP-1000 may be used to rack mount 2 TW-7W splitters.
FIGURE 4. US-2002 Monaural Master Speaker Station Configuration with 1 Power Supply.

16
The configuration, shown in Figure 5, is suitable for smaller intercom systems when you want to operate the US-2002 as a
master speaker station, with a separate speaker for each intercom channel. Make sure the US-2002 internal dip switches are set
for binaural speaker operation as described on page 10. Also, set the SPS2001 Combine/Isolate switch to the Isolate position.
With this setting, the two (2) intercom channels are completely separated. The amplified speaker in the SPS2001 is used as the
speaker output for channel 1, and the SPK2000 is used for channel 2. The PA-KP local power supply is optional. When a PA-
KP is connected, the US-2002 automatically disconnects from system power supplied by the SPS2001. Since the US-2002 is
not drawing power from the intercom system, more system power is available for additional belt packs, etc.
NOTE: For more information about cables, see Figure 15 on page 26.
NOTE: A BOP-1000 may be used to rack mount 2 TW-7W splitters.
FIGURE 5. US-2002 Binaural Master Speaker Station Configuration with 1 Power Supply.

17
The configuration, shown in Figure 6, is suitable for smaller intercom systems when you want to operate the US-2002 as a
master headset station. In this configuration, the PS2001L Combine/Isolate switch is set to the Isolate position. With this
setting, the 2 intercom channels are completely separated. Typically, a headset is connected to the front panel of the US-2002,
and the US-2002 DIP switches are set to monaural operation (default setting), so both intercom channels are heard in the
monaural headphones (binaural headphone operation is not supported). The PA-KP local power supply is optional. When a
PA-KP is connected, the US-2002 automatically disconnects from system power supplied by the PS2001L. Since the US-2002
is not drawing power from the intercom system, more system power is available for additional belt packs, etc.
NOTE: A BOP-1000 may be used to rack mount 2 TW-7W splitters.
NOTE: For further information about cables, see Figure 15 on page 26.
FIGURE 6. US-2002 Master Headset Station Configuration with 1 Power Supply.

18
The configuration, shown in Figure 7, is suitable for large intercom systems when you want to operate the US-2002 as a
master speaker station, with one (1) speaker to monitor both intercom channels. In this configuration, the SPS-2001 and
PS2001L Combine/Isolate switches are set to the Combine position. With this setting, all intercom stations connected to the
SPS2001 are combined on intercom channel 1 and all intercom stations connected to the PS-2001L are combined on channel
2. The amplified speaker in the SPS-2001 is used as the speaker output for the US-2002 and the US-2002 dip switches are set
for monaural operation (default setting) so that both intercom channels are heard in the speaker. The PA-KP local power
supply is optional. When a PA-KP is connected, the US-2002 automatically disconnects from system power. Since the US-
2002 is not drawing power from the intercom system, more system power is available for additional belt packs, etc.
NOTE: For more information about cables, see Figure 15 on page 26.
NOTE: A BOP-1000 may be used to rack mount 2 TW-7W splitters.
FIGURE 7. US-2002 Monaural Master Speaker Station Configuration with 2 Power Supplies.