Telex EMS4000 User Instructions

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Telex

User Instructions

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Listen

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Listen

™

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Listen

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EMS4000

RESET

Model EMS4000 Four-channel Expansion Master Station and Power Supply

Audiocom

Intercom Systems

FCC Statement

This equipment uses and can radiate radio frequency energy that may cause in

terference to radio communications if not installed in accordance with this man

ual. 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 op

erated 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.

Introduction.

Thank you for purchasing the Audiocom EMS4000 Four-channel Expansion

Master Station and Power Supply. 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 the EMS4000, please take a few moments to look

through this booklet before using the Intercom Expansion Station for the first

time.

Table of Contents

Description .............4

Features ..............5

Installation .............7

Unpacking ............7

Configuration Pre-check ..........7

Mounting Configurations .........10

Connection Notes ...........14

Cables .............14

Power-Up ............15

Sidetone Adjustments ..........15

Operation .............15

Specifications ............16

Factory Service and Parts Information .......18

Audiocom®

Description

The EMS4000 adds four powered intercom channels to an MS2000 Master Station,

and it provides talk, listen and call buttons for the added channels. Up to 4 EMS4000

Expansion Master Stations may be connected to the MS2000 to add up to 16 chan

nels (18 channels total). The MS2000 microphone is used to talkback to the

EMS4000 channels, and the MS2000 speaker is typically used for listening. How

ever, there are also separate speaker jacks on the back panel of the EMS4000 for in

dependent monitor speakers, if desired. There are also 4 additional program inputs

on the back of the EMS4000, 1 for each added channel.

The MS2000 / EMS4000 combination can be used as a simple, multi-channel intercom

user station. In this configuration, the program inputs (and possibly the PA output of

the MS2000) are most likely not used, and the station operator has only talk, listen and

call capability. It is also possible that advanced features of the MS2000, such as Mic

Kill Send, might be turned off. Alternatively, the MS2000 / EMS4000 can be used as a

master station. In this application, one or more program inputs and the PA output may

be connected, and the program signals to the intercom channels can be turned on or off

from the MS2000. Additionally, the Mic Kill Send feature can be enabled, and micro-

phones on any channels may then be turned off from the MS2000.

Listen

Call

3456

Talk

123

100-240VAC 60/50 HZ

6 7 8 9 10 11

Figure 1. ES4000A Reference View (See numbered features on next page)

Listen

Call

Talk

CHN3 CHN4 CHN5 CHN6

Listen

Call

Talk

CLASS2 WIRING 1.5 A 24 VDC

EXPINEXP

EMS4000

345

Reset

SPEAKER

OUT

LINE LEVEL

1VRMS

PROGRAM

INPUTS

BAL-OUT UNBAL-IN

PGMVOL

3456

TELEX COMMUNICATIONS,INC.

MADE IN USA

Features

1. Intercom Talk Keys: Momentary or latching (hands-free) operation possible.

2. Call Keys: Used to call intercom channels and to indicate incoming calls.

3. Intercom Listen Keys: Momentary or latching operation possible.

4. Channel Power Status Indicators: The indicators are green for normal operation

and change to red if there is a short circuit or overload condition on a power out

put line. If an indicator turns red, either disconnect the corresponding channel

connector or turn off the intercom system and locate the problem before resum

ing operation

5. Reset Button: Used to resume normal operation after an overload condition has

been corrected.

6. Universal AC Power Connector: Accepts a variety of international power cord

types.

7. Intercom Channel Connectors: These connectors provide the power and audio

connections for each of the 4 intercom channels.

8. EXP IN and EXP OUT Connectors: The EXP IN connector receives the micro-

phone audio signal from the MS2000, and it sends the monaural mix of the four

EMS4000 channels to the MS2000 speaker or headset. The EXP OUT connector

connects to the EXP IN connector of an additional EMS4000. Up to 4 EMS4000

Expansion Master Stations may be daisy chained with the EXP IN and EXP

OUT connectors. An EXP IN/OUT cable is supplied with each EMS4000.

9. SPEAKERS: Usually, the listen mix of all 4 EMS4000 channels is sent to the

MS2000 speaker or headset via the EXP IN connector. Alternatively, speakers

may be connected to one or more of the speaker outputs of the EMS4000.

10. BAL / UNBAL Switch: This selector switch sets the EMS4000 for compatibility

with either Audiocom or Clear-Com* channel connector pin-outs, channel

power requirements, and call signaling requirements. Important! The internal

switches S200 and S600 must be set the same as the back panel BAL/UNBAL

switch.

* Brand names mentioned are the property of their respective companies.

Audiocom®

11. Program Inputs Connector and Trimmers: Each intercom channel has its own

program input and level adjust trimmer. For each program input, there is an inter

nal jumper which routes the program either to the intercom channel only, or to

both the intercom channel and the MS2000 headset or speaker (default setting).

Additionally, the program signal to the intercom channel may be turned on or

off via the MS2000 front panel programming. There is also an internal program

interrupt DIP switch which selects either automatic program interrupt when the

station operator activates a channel's talk key, or no program interrupt during

talk. The EMS4000 program inputs connector may be broken out to common

3-pin XLR audio cables using an optional XP-4PGM Breakout Panel.

12. Configuration Switches, Jumpers and Sidetone Controls (Figure 2

). These let

you customize the operation of the EMS4000 to match your intercom system re

quirements. See “Configuration Pre-check”, page 7

BAL / UNBAL

SW2

321

J18

Ch 5

321

J21

Ch 6

Sidetone Trimmers

Program

Listen

Jumpers

321

J15

Ch 3

SW1

DIP Switches

321

J16

Ch 4

SW3

, for details.

S600

S200 & S600

MUST BE SET THE SAME

AS SW2 ON THE BACK PANEL.

FACTORY SETTING BAL

(AUDIOCOM)

S200

UNBAL

(CLEAR-COM)

BAL

Figure 2. Locations of configuration switches, jumpers, and sidetone controls. (Top cover removed.)

Installation

Unpacking

The EMS4000 is supplied with the following items. Contact the shipper or your

Audiocom dealer immediately if anything is damaged or missing. Detach and fill out

the registration card and return it to Telex to properly register your intercom station.

Quantity Description

1 EMS4000 Expansion Master Station and Power Supply 1 Warranty and registration card 1 User Instructions 1 EXP IN/OUT Cable, with 1/8-inch (3.5 mm) phone plugs 2 Rack Mount Cosmetic Covers

WARNING

The following instructions are for use by qualified personnel

only. To avoid electric shock, do not remove the cover un

less you are qualified to do so.

AVERTISSEMENT

Les instructions qui suivent s'adressent uniquement a un

technicien qualifie. Pour evite des chocs electriques, ne pas

ouvrir le boitier, a moins d'y entre habilite.

Configuration Pre-check

Before making connections, read the configuration notes that follow, and make sure

that all switches and jumpers are properly set for your intended usage. Locations of

configuration switches and jumpers are shown in Figure 2

. Only the DIP switches

and jumpers require internal access. If access is required, remove 3 screws from the

top cover and 3 screws along the bottom edge from each side.

DIP Switches

DIP switches and their default settings are listed in Table 1, page 8. The following

paragraphs provide additional details.

Audiocom®

Table 1. Configuration Switch Settings

Switch

Number

SW1-1 Program Interrupt, Ch 6

SW1-2 Program Interrupt, Ch 5

SW1-3 Program Interrupt, Ch 4

SW1-4 Program Interrupt, Ch 3

SW1-5 Audiocom Call Send, Ch 3*

SW1-6 Audiocom Call Receive, Ch 3*

SW1-7 Audiocom Call Send, Ch 4*

SW1-8 Audiocom Call Receive, Ch 4*

Important! All three switches must be set the same. Factory default is Balanced.

SW2 Audiocom or Clear-Com

S200

S600

SW3-1 Audiocom Call Send, Ch 5*

SW3-2 Audiocom Call Receive, Ch 5*

SW3-3 Audiocom Call Send, Ch 6*

SW3-4 Audiocom Call Receive, Ch 6*

SW3-5 Not used

SW3-6 Not used

SW3-7 Not used

SW3-8 Not used

Audiocom or Clear-Com

Description Settings Default

DIP Switch SW1 (Internal)

On (Closed): Enabled Off (Open): Disabled

Balanced (BAL) - Unbalanced (UNBAL) Operation

operation

DIP Switch SW3 (Internal)

Out: Audiocom (Balanced) In: Clear-Com (Unbalanced)

BAL: Audiocom UNBAL: Clear-Com

On (Closed): Enabled Off (Open): Disabled

On (Closed): N/A Off (Open): N/A

Setting

Off

Out (BAL)

BAL

Don’t care

These switches apply only when the BAL/UNBAL switches SW2 (back panel), S200 and

S600 (both internal) are set to the BAL position for Audiocom usage (see Figure 2 the switches are set to the UNBAL position, call send and receive are always enabled.

). When

Program Interrupt DIP Switches

Each intercom channel has a dedicated program input. These can be used to feed

background music, mix-minus audio (for broadcasting usage) etc. to the intercom

channels. If external program sources will be connected to the EMS4000, you have a

choice of whether or not you want the program audio to interrupt (shut off) on the in

tercom channel while the MS2000A/EMS4000 station operator is talking.

Audiocom Call Send and Receive DIP Switches

By default, all channels of the EMS4000 can send and receive Audiocom call sig

nals. You can disable call send or call receive capability for selected channels if de

sired.

Balanced/Unbalanced Switches

The switches are located on the back panel ( SW2) and internal (S200 & S600).

These switches must be set to the balanced (BAL) position for use with an

Audiocom Intercom System. Set the switches to the unbalanced (UNBAL) position

when using the MS2000A / EMS4000 with a Clear-Com Intercom System. All

switches must be set the same.

Direct Program Listen Enable / Disable Jumpers

By default, each program input can be heard by intercom stations on the correspond-

ing intercom channel. (This can be turned on or off for each program input via the

MS2000 front panel programming. See "Turning the Program Inputs On and Off" in

the Operation section of the MS2000 User Instructions.) Additionally, all program

signals can be heard directly in the MS2000 speaker or headset, and each program is

output at the corresponding speaker jack on the back of the EMS4000. To disable di

rect program listening for a program input, reset the appropriate jumper as shown in

Table 2

. Locations of the jumpers are shown in Figure 2, page 6.

Table 2. Direct Program Listen Enable / Disable Jumpers

Jumper Description Settings for All Jumpers

J15 Program 3 direct to Headset or Speaker

J16 Program 4 direct to Headset or Speaker

J18 Program 5 direct to Headset or Speaker

J21 Program 6 direct to Headset or Speaker

Pins 2&3 Shorted: Enable Pins 1&2 Shorted: Disable

Audiocom®

Audiocom / RTS Select Jumpers.

These internal jumpers (W102 through W802) are for special applications which are

not applicable to the EMS4000. Leave the jumpers in the factory default position

(pins 2 & 3 shorted).

Sidetone Trimmers

These trimmers are normally adjusted after all components are connected, and they

can be accessed through the bottom cover (Figure 3

). Refer to the MS2000 User

Manual for the sidetone adjustment procedure.

Ch 5

Sidetone

Ch 6

Sidetone

Figure 3. Sidetone Trimmer Access on Bottom of ES4000A

Sidetone

Ch 3

Sidetone

Ch 4

Mounting Configurations

The EMS4000 mounts in a standard 19 inch equipment rack and is 1 rack unit high.

Install the 2 supplied rack mount cosmetic covers when installing the EMS4000 in

the rack.

When rack mounting components, you may not be able to access the sidetone

☞

trimmers after the components have been mounted. In this case, you can position

the components in the rack and make all required connections. Then, adjust the

sidetone trimmers before installing and tightening all rack mount screws.

PGM

OANO

000

2IN

9 109

PGM

1IN

OUT

Note: For further informa tion about the cable num bers, see page 14

CH 1-2

XP-USPG

PGM

5IN

6IN

9 99

CH 3 - 6

XP-4PGM

PGM

9IN

10 IN

9 999

CH 7 - 10

XP-4PGM

PGM

4IN

FRONT

PGM

8IN

FRONT

BACK

PGM

3IN

BACK

PGM

7IN

BACK

CH 1-2

MS2000

100-240VAC60/50 HZ

TELEXCOMMUNICATIONS,INC.

PUSH

Telex

MADEINUSA

CHN1/ 2 CHN1/ 2

CH 3-6

EMS4000

1 1

100-240VAC60/50 HZ

CH 7-10

EMS4000

100-240VAC60/50 HZ

CHN3 CHN4 CHN5 CHN6

CLASS2WIRING 1.5 A 24 VDC

CHN3 CHN4 CHN5 CHN6

CLASS2WIRING 1.5 A 24 VDC

PROGRAM

INPUTS

SPEAKERS LINELEVEL

1VRMS

EXP

P.A.

OUT

PUSH

VOL PGM1

BAL-OUT

CHN1

UNBAL-I N

TO TW-7W SPLITTERS

(FOR HOME RUN CONNECTION)

OR TO A STRING OF

INTERCOM STATIONS

(DAISY CHAIN CONNECTION)

EXPINEXP

(FOR HOME RUN CONNECTION)

(DAISY CHAIN CONNECTION)

PROGRAM

OUT

INPUTS

BAL-OUT

LINELEVEL

UNBAL-IN

1VRMS

TO TW-7W SPLITTERS

OR TO A STRING OF

INTERCOM STATIONS

EXPINEXP

PROGRAM

OUT

INPUTS

BAL-OUT

LINELEVEL

UNBAL-IN

1VRMS

VOL

PGM2

PGMVOL

3456

PGMVOL

3456

PUSH

CHN2

TELEXCOMMUNICATIONS, INC.

MADEIN USA

TELEXCOMMUNICATIONS, INC.

MADEIN USA

CH 1 CH 2

CH 3 CH 4 CH 5 CH 6

CH 7 CH 8 CH 9 CH 10

Note: A BOP-1000 Rack Mount Plate may be used to rack mount 4 XP-4PGM or XP-USPG breakout panels.

Figure 4. Master station with multiple EMS4000 Expansion Stations. This con figuration provides all of the channel power and program input connections for 10-channel intercom station. It also interfaces the PA jack of the MS2000 to a stan dard, 3-pin XLR audio cable. Note: The MS2000 includes a speaker and is typically used for intercom listening, with a gooseneck microphone connected to the MS2000 for talk-back. Alternatively, a headset with a microphone may be used.

THER EMS4

Audiocom®

EGM MIC

FRONT VIEW

Listen

Call

3456

Talk

100-240VAC60/50 HZ

100-240VAC 60/50 HZ

Volum e

Listen

Call

Talk

Telex

TELEXCOMMUNICATIONS, INC.

MADEIN USA

Vox

Headset

PanelMic

AllTalk

Listen

Call

Talk

CHN3 CHN4 CHN5 CHN6

CLASS2 WIRING 1.5 A 24VDC

Listen Listen

MicKill

Call Call

Talk Talk

MS2000

Listen

Call

Talk

EMS4000

BACK VIEW

PUSH

CHN1 / 2 CHN1 / 2

PROGRAM

MS2000

Combine

Isolate

EMS4000

PUSH

CHN2

TELEXCOMMUNICATIONS, INC.

MADEIN USA

Reset

Volum e

345

INPUTS

SPEAKERS LINELEVEL

1VRMS

EXP

P.A.

OUT

EXPINEXP

OUT

LINELEVEL

1VRMS

PUSH

VOL PGM1

BAL- OUT

CHN1

UNBAL- IN

1 1

PROGRAM

INPUTS

BAL-OUT UNBAL-IN

VOL

PGM2

PGMVOL

3456

CH 1 CH 2 CH 3 CH 4 CH 5 CH 6

ADDITIONAL INTERCOMSTAT ION

Figure 5. 6 Channel Daisy Chain Configuration This configuration adds four ad ditional channels to the MS2000. All intercom channels will be monitored through the MS2000 internal speaker.

Note: For further informa tion about the cable num bers, see page 14

FRONT VIEW

SSHO

OSS

Note: For further informa tion about the cable num bers, see page 14

Volum e

Listen

Call

3456

Talk

BACKVIEW FOR HOME-RUN CONNECTION

TELEXCOMMUNICATIONS, INC.

MADEIN USA

100-240VAC60/50 HZ

TW-7W

1 11111 1

CH 3

Headset

MicKill

Vox

PanelMic

Talk Talk

AllTalk

Listen

Call

Talk

CHN1 & 2 CHN1& 2

CLASS2WIRING 1.5A 24VDC

CHN3 CHN4 CHN5 CHN6

CLASS2 WIRING1.5 A 24 VDC

MS2000

Listen Listen

Call Call

EMS4000

PROGRAM

INPUTS

SPEAKERS

LINELEVEL

1VRMS

EXP

P.A.

BAL- OUT

OUT

MADEIN USA

UNBAL- IN

EXPINEXP

OUT

LINELEVEL

1VRMS

TW-7W

1 11111 1

CH 5

MS2000

Combine

Isolate

EMS4000

345

TELEXCOMMUNICATIONS,INC. MADE IN USA

PUSH

CHN2

TELEXCOMMUNICATIONS, INC.

MADEIN USA

Reset

TO ADDITIONAL TW-7W SPLITTERS

CH 1 CH 2

Volum e

PUSH

VOL

PGM1

PGM2

CHN1

PROGRAM

INPUTS

PGMVOL

BAL-OUT

3456

UNBAL-IN

TW-7W

1 11111 1

CH 4

TO ADDITIONAL INTERCOM STATIONS

* KEEP CABLES FROM MS2000 TO

TW-7W A

Figure 6. 6 channel Home-run configuration: With a headset connected to the front panel of the MS2000 the DIP switches must be set to monaural operation (de fault setting) so that all intercom channels are heard in the monaural headphones (binaural headphone operation is not supported). Refer to the MS2000 User Instructions “Monaural or Binaural Operations DIP Switches”.

1 11111 1

RT ASP

IBLE.

TW-7W

CH 6

Note: A BOP-1000 Rack Mount Plate may be used to mount 2 TW-7W splitters.

Audiocom®

Connection Notes

Typical connections for the MS2000/EMS4000 are shown starting with Figure 4

page 11

. Select the configuration which most closely matches your intended usage.

Cables

The numbers below correspond to the cable numbers in the connection drawings on

the previous pages.

1. 1-channel intercom cable. Sold separately. Use Telex "ME" cables, below. Or,

build per Figure .

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.

2. 2-channel intercom cable. Sold separately. Use Telex "ME /2" cables, below.

Or, build per Figure .

ME-25/2: 25' (7.6 m) cable with Male and Female 6-pin XLR connectors.

ME-50/2: 50' (15.2 m) cable with Male and Female 6-pin XLR connectors.

ME-100/2: 100' (30.4 m) cable with Male and Female 6-pin XLR connectors.

3. Y adapter cable. Sold separately. Use Telex CA-23-16. Or, build per Figure .

4. 3 ft (0.91 m) speaker cable with RCA plugs. One supplied with each SPS2000A,

SPK-1000, and SPK-2000.

5. 18" (457 mm) EXP IN/OUT cable, stereo miniplug to stereo miniplug. One sup

plied with each ES4000A.

6. 18" (457 mm) CHANNEL OUTPUT cable, 15-pin Male Dsub to 15-pin Male

Dsub. One supplied with each ES4000A.

7. Shielded patch cable, 9-pin Male Dsub to 9-pin Female Dsub. Customer local

purchase: available at Radio Shack, etc. Note: All pins must be connected

straight through: do not use an RS232 computer cable!

8. Shielded patch cable, stereo miniplug to stereo miniplug. Customer local pur

chase. Available at Radio Shack, etc.

9. Shielded audio cable. Must have male 3-pin XLR connector at one end for con

nection to the XP-USPG or XP-4PGM program inputs. Pin-out for program in

puts 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 con

nection 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 supplied with each XP-ES4000A.

Power-Up

Plug in the power cord. The EMS4000 channels power-up identically to channels 1

and 2 of the MS2000. Refer to the MS2000 User Instructions for all power-up infor-

mation. The MS2000 and EMS4000 can be powered up in any order.

Sidetone Adjustments

Use the sidetone adjustment procedure as described in the MS2000 User Instruc

tions, except substitute channel 3, channel 4, etc. The locations of the MS4000

sidetone trimmers are shown in Figure 3

Operation

The EMS4000 channels operate identically to channels 1 and 2 of the MS2000. Re

fer to the MS2000 User Instructions for all operating information.

Audiocom®

Specifications

General

Power Requirements:

AC Input: 100-240 VAC, 50/60 Hz

Channel Power: 24 VDC nominal (12 to 30 VDC) 65 to 150 mA

Local Power (with PS-L Wall-pack Power Supply or equivalent): 14 to 15 VDC

Current: 65 mA, quiescent; 150 mA maximum

Dimensions: 1.75" (44.5 mm) high, 19" (483 mm) wide, 10.31" (261.9 mm) deep

Weight: approximately 4.5lb (2kg)

Environmental Requirements:

Storage: -20°Cto80°C; 0% to 95% humidity, non-condensing

Operating: -15°Cto60°C; 0% to 95% humidity, non-condensing

PROGRAM INPUTS Connector

Input Level: 100mV maximum

Voltage Gain: 25 ±3 dB

Output Level (to intercom channel): 1.0 Vrms nominal, 2.3 Vrms max.

Input Impedance: 75 kohm

Common Mode Rejection: Greater than 50 dB

Connector Type: DB9F Female, 9-pin D-subminiature

Pin 1: Common

Pin 2: Channel 3 program in low

Pin 3: Channel 4 program in low

Pin 4: Channel 5 program in low

Pin 5: Channel 6 program in low

Pin 6: Channel 3 program in high

Pin 7: Channel 4 program in high

Pin 8: Channel 5 program in high

Pin 9: Channel 6 program in high

Intercom Channels, Balanced Mode (All BAL / UNBAL switches set to BAL position)

Output Level: 1 Vrms nominal

Input Impedance: 300 ohms

Bridging Impedance: greater than 10,000 ohms

Sidetone: -40 dB, 35 dB adjustable range

Call Signaling:

Send: 20 kHz ±100 Hz, 0.5 Vrms ± 10%

Receive: 20 kHz ±800 Hz, 100 mVrms

Mic-Kill Frequency:

Send: 24 kHz ±300 Hz, 0.5 Vrms ± 10%

Detect: 24 kHz ±800 Hz, 100 mVrms

Noise Contribution: less than -70 dB

Common Mode Rejection Ratio: greater than 50 dB

Connector type: One XLR-3M for each channel.

Balanced Configuration Pinouts

Pin 1: Common

Pin 2: Intercom audio low and +24 VDC input

Pin 3: Intercom audio high and +24 VDC input

Intercom Channel, Unbalanced Mode (All BAL / UNBAL switches set to UNBAL position)

Output Level: 1 Vrms ±10%

Input Impedance: 150 ohms

Bridging Impedance: greater than 10,000 ohms ±5%

Call Signaling:

Send: 11 ±3 VDC

Receive: 4 VDC minimum

Connector Type: Uses the same connectors as for balanced mode, above, but with pinouts modified by BAL/UNBAL switch on back panel as follows:

XLR-3 Unbalanced Configuration Pinouts

Pin 1: Common

Pin 2: +24 VDC input

Pin 3: Intercom audio high

Expansion Input/Output

Connector Type: 1/8" (2.0 m) stereo phone jack

Tip: Talk output

Ring: Listen input

Sleeve: Common

Audiocom®

Factory Service and Parts Information

When returning equipment for repair include your return address, telephone number

and proof of date of purchase, along with a description of the problem.*

The address for Audiocom equipment returns and parts information is:

Service Department

Telex Communications, Inc.

West 1st Street

Blue Earth, Minnesota 56013 U.S.A.

Telephone: (507) 526-3205

Toll Free: 800-218-2412

Fax: (507) 526-2295

Warranty Repairs - If in warranty, no charge will be made for the repairs. Equipment

returned for warranty repair must be sent prepaid and will be returned prepaid.

Non-Warranty Repairs - Equipment that is not under warranty must be sent prepaid

to Telex. If requested, an estimate of repair costs will be issued prior to service. After

your approval and completion of the repairs, the equipment will be returned on a col-

lect basis. Collect charges may be avoided by sending a signed check for payment in

full along with your signed estimate approval form (shipping charges are included in

the estimate).

* For sales / technical support and system design contact:

Pro Audio Sales Department

Telex Communications, Inc.

9600 Aldrich Avenue South

Minneapolis, Minnesota 55420 U.S.A.

Telephone: (612) 884-4051

Toll Free 800-392-3497

Fax: 800-323-0498

This page left blank intentionally

TELEX COMMUNICATIONS, INC. 9600 Aldrich Ave. So., Minneapolis, MN 55420 U.S.A.

9350-7673-000 Rev. A 2/2000

Telex EMS4000 User Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual