Telex Audiocom WM1000 User manual

Model WM1000/WM2000
Wall Mount Intercom Stations
User Instructions
9350-7621-000 Rev D 5/2006
Volume
WM2000
GRN 1
RED 2 Ch Select Talk
Call
Listen
Headset
TM

PROPRIETARY NOTICE
The product information and design
disclosed herein were originative by and
are the property of Telex Communication,
Inc. Telex 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 2006 by Telex Communications,
Inc. All rights reserved. Reproduction, in
whole or in part, without prior written
permission from Telex is prohibited.
WARRANTY NOTICE
See the enclosed warranty card for further
details.
CUSTOMER SUPPORT
Technical questions should be directed to:
Customer Service Department
RTS/Telex Communications, Inc.
12000 Portland Avenue South
Burnsville, MN 55337 U.S.A.
Telephone: [phone]
Fax: [phone]
Factory Service: 800-553-5992
RETURN SHIPPING INSTRUCTIONS
Customer Service Department
Telex Communications, 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
Telex Communications, 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
Notes
219

18 3
Notes

4 17
Mic-Kill Detect Frequency:
24 kHz ±800 Hz, 100 mVRMS
Noise Contribution:
less than -70 dB
Common Mode Rejection Ratio:
greater than 50dB
Connector Type:
Six-position terminal block with screw-in wire clamps
Pin 1 Audio and DC Common
Pin 2 Local power (12 to 15 VDC, 65 to 150 mA)
Pin 3 Intercom channel 1 audio low and +24 VDC phantom power
Pin 4 Intercom channel 1 audio high and +24 VDC phantom power
Pin 5 Intercom channel 2 audio low and +24 VDC phantom power
Pin 6 Intercom channel 2 audio high and +24 VDC phantom power
Intercom Channel, Unbalanced Mode (SW-1 set to UNBAL position)
Output Level:
1 VRMS ±10%
Input Impedance:
150 ohms
Bridging Impedance:
greater than 10,000 ohms
Sidetone:
-40 dB, 35 dB adjustable range
Call Signaling:
Send:
11 ±3 VDC
Receive:
4 VDC minimum
Connector Type:
Six-position terminal block with screw-in wire clamps
Pin 1 Common
Pin 2 Local power (12 to 15 VDC, 65 to 150 mA)
Pin 3 Channel 1 +24 VDC input
Pin 4 Channel 1 intercom audio high and DC call
Pin 5 Channel 2 +24 VDC input
Pin 6 Channel 2 intercom audio high and DC call
Introduction
Thank you for purchasing the Audiocom WM1000/2000 Wall Mount Intercom
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 station, please take a few moments to look through this
booklet before using the Intercom Station for the first time.
Description
The WM1000/2000 Intercom Stations are designed for stationary, wall-
mounted installation in standard two-gang electrical boxes. The WM1000 is a
single-channel station; the WM2000 provides switch-selectable access to either
of two intercom channels. The WM1000 and WM2000 are ideal when users
need to access the intercom system from strategic locations where a desktop
station would be unsuitable, but they do not wish to carry around a belt-pack
station. Since all of the intercom electronics are in the intercom station, the user
need only connect a headset or telephone style handset to begin communicating.
Alternatively, a headset or telephone handset can be left right at the station.
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
SW1
Ch 2
Ch 1
TM
TOP
FRONT
BACK
1
2
3
4
56
7
8
9
9
10
11 (4 Places)
CLOSED (ON)
OPEN (OFF)
DIP SWITCH
POSITIONS
Figure 1. Reference View, WM-2000 shown (see numbered features list).

16 5
Features
1. Channel Select Switch (WM-2000 Only): Used to switch between intercom
channels one and two. The switch lights green for channel one and red for
channel two.
2. Intercom Listen Key: Both momentary (push-to-listen) and latching (hands-
free-listen) are possible.
3. Call Key: Used to send call signals on the intercom channel and to indicate
incoming calls.
4. Intercom Talk Key: Both momentary (push-to-talk) and latching (hands-
free-talk) are possible.
5. Dynamic-Mic Headset Connector: 4-pin male XLR connector accepts
headsets with monaural headphones and either a balanced or unbalanced
dynamic microphone.
6. Volume Control: Adjusts intercom volume to headphones.
7. Audiocom / Clear-Com Selector Switch: The selector switch sets the
intercom station for compatibility with either Audiocom or Clear-Com
channel connector pin-outs, channel power requirements, and call signaling
requirements.
8. Configuration DIP Switches: DIP switches are provided to enable/disable
the following features:
Mic Kill: With this feature activated, the station’s microphone may be
turned off from a remote master controller.
Call Beep: An optional call beep tone can be used for incoming call
notification.
Headset Microphone Type Selection: Balanced or unbalanced
microphone may be selected.
DC Call Enable: This may be turned on to use the intercom station with
intercom systems that use DC call signaling.
9. Connections Terminal Block: Used to connect intercom channel(s) and an
optional local power supply.
10. Sidetone Trimmers: These are used to adjust the level of the station
operator’s own voice in the headphones.
11. Mounting Holes: The mounting holes fit any standard, two-gang electrical
box.
Specifications
General
Power Requirements
Phantom Power:
24VDC nominal (12 to 30 VDC), 65 to 150 mA
Local Power:
12 to 15 VDC, 65 to 150 mA
Dimensions
Mounts in a standard two-gang electrical box
Environmental Requirements
Storage:
-20° C to 80° C; 0% to 95% humidity, non-condensing
Operating:
-15° C to 60° C; 0% to 95% humidity, non-condensing
Dynamic-Mic Headset
Microphone:
50 to 200 ohm, dynamic (balanced or unbalanced)
Headphones:
150 to 600 ohm, monaural
Connector Type:
XLR-4M
Pin 1 Microphone Low
Pin 2 Microphone High
Pin 3 Headphone High
Pin 4 Headphone Low
Intercom Channels, Balanced Mode (SW1 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

6 15
Installation
Unpacking
Each WM1000/2000 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.
Configuration Switch Pre-check
Before making connections, read the configuration switch notes that follow and
make sure that all switches are properly set for your intended usage. Table 1
lists the switch descriptions and factory default settings. Figure 1 shows the
locations of the switches.
Mic Kill DIP Switch (DIP Switch 1)
Audiocom master stations can transmit an inaudible signal to turn off the
microphones in all remote intercom stations (including WM1000/2000) on an
intercom channel. This is useful when a remote intercom station has been left
unattended with the microphone on. The procedure to use this feature from a
master station is a two-step process so that it is very unlikely that microphones
will ever be turned off by accident. However, you may wish to disable the mic
kill feature at the WM1000/2000 if communications will be of a critical nature
where it is absolutely essential the microphone never be remotely deactivated.
DC Call Enable (DIP Switch 2)
Leave this switch in the open position for Audiocom applications. Set it to the
closed position if the WM1000/2000 will be used in a Clear-Com intercom
system.
Incoming Call Beep (DIP Switch 3)
By default, incoming calls are indicated by a red-flashing Call key and a beep
tone in the headphones. If you do not want the beep tone, set DIP switch 3 to
the closed position.
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Operation
Channel Select (WM2000 Only)
Tap the Ch Select key to select channel 1 or 2. The key is green when channel 1
is selected and red when channel two is selected.
Receiving Calls
1. When there is an incoming call signal the Call key will flash red. There
will also be a beep tone in the headphones if the beep feature is
activated (page X).
NOTE: WM2000 only: incoming call indication is provided only for the
currently selected channel.
2. Turn on the Talk and Listen keys and begin your conversation.
NOTE: You can turn the talk and listen keys on in either momentary or latched
mode. For latched operation, tap the key to turn it on Then tap it again to turn it
off when finished.
Calling an Intercom Channel
1. WM2000 only: select the desired intercom channel.
2. Press and hold the Call key.
An inaudible call signal will be sent, and the Listen key will
automatically turn on.
3. When you hear a response, release the Call key and activate the talk
key.
4. Turn off your Talk and Listen keys to end the conversation.

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Table 1. Configuration Switch Settings
Headset Microphone Type Selection (DIP Switch 4)
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 DIP switch 2 to on.
Balanced/Unbalanced Switch (SW-1)
This switch is set at the factory to the balanced (BAL) position for use with
Audiocom intercom channels. Set the switch to the unbalanced (UNBAL)
position for use with Clear-Com intercom systems. Be sure and use the
appropriate connection information based on how you have this switch set.
Pair
Pair
Pair
Denotes twisted pair.
Denotes shield.
Channel 1 Audio low / Power
Shield*
DC Common
Shield*
TO POWER
SUPPLY CONNECTOR
TO ADDITIONAL
SINGLE- OR TWO-CHANNEL STATIONS
Cable Type: 22AWG Stranded, 3-Pair Twisted-wire, with Shield
Channel 2 Audio low / Power
Channel 2 Audio high / Power
+ DC
COMMON
Channel 1 Audio high / Power
*Shield: Earth ground (Connect at power supply only. Do not short to DC common)
OPTIONAL LOCAL
POWER SOURCE
12 to 15 VDC, 250 mA
PIN 1
Figure 7. Audiocom mode connections for a WM2000 Intercom Station.
Resistors 300 Ohm, 1/4W
Capacitors 22 f, 35V
Non-polarized Electrolytic
μ
Channel audio low
Channel audio high
Common
Figure 8. Audiocom mode line termination for dry-line operation. (One
required for each channel).

8 13
Intercom Channel Connections
Important!
The following paragraphs and illustrations describe installation of the
WM1000/2000 in an Audiocom Intercom System. To use the WM1000/2000 in
a Clear-Com Intercom System, set SW1 to the UNBAL position, set DIP switch
2 to the Closed position, and connect the Clear-Com channel wires using the
Unbalanced Mode Intercom Channel pin-out information listed in the
specifications.
General Information
NOTE: After connecting intercom stations as described below, and before
installing the mounting screws, connect a headset and perform the sidetone
adjustment as described on page 10.
The WM1000/2000 mounts in a standard two-gang electrical box. Some
example intercom system configurations are showing the Figures 2 through 5,
pages 11 through 13. Detailed connections for the WM1000/2000 are shown in
Figures 6 and 7, pages 13 and 14. There are two basic methods for connecting
the WM1000/2000: 1) using a phantom powered connection, and 2) using local
power. The two methods are discussed below.
Method 1: Phantom Powered Connection
In this method, operating power and intercom audio are delivered to the
WM1000/2000 over the same wires. The advantage of this setup is simplicity of
connection. Also, the Audiocom power supply automatically provides
terminating impedance for the intercom system. Without this terminating
impedance, the sound quality on the channel will be very distorted, and the
levels will shift every time additional stations are connected to the channel. The
disadvantage of the phantom power method is that some operating power is lost
over very long intercom cables, and performance will then be reduced at
remotely located stations. Generally, if the intercom stations are located within
a few hundred feet of the power supply, the phantom power will be sufficient.
The actual distance over which power can be delivered can vary, however,
depending on the number of stations connected. Increasing the number of
stations will reduce the distance. Note, the range over which power can be
delivered is independent from the range over which audio can be sent. Audio
can be transmitted for several miles, providing that intercom stations are locally
powered, as described below.
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volu me
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volu me
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volu me
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
LINE
TERMINATION
Audiocom
WM1000
Headset
Volu me
Talk
Call
Listen
WM1000 WM2000 WM2000
Audiocom
WM1000
Headset
Volu me
Talk
Call
Listen
WM1000 WM2000WM2000
Figure 5. An example of an intercom system using all local powered stations,
with no power being distributed on the intercom channels (dry lines). WM2000
stations are shown, but WM1000 stations may also be used. Since an Audiocom
power supply is not used, the installer must connect a line termination
somewhere in each channel for proper operation. The required line termination
is shown in Figure 8.
Pair 1
Pair 2
Denotes twisted pair.
Denotes shield.
Channel Audio high / Power
Channel Audio low / Power
Shield*
DC Common
Shield*
TO POWER
SUPPLY CONNECTOR
Cable Type: 22AWG Stranded, 2-Pair Twisted-wire, with Shield
TO ADDITIONAL
SINGLE-CHANNEL STATIONS
OPTIONAL LOCAL
POWER SOURCE
12 to 15 VDC, 250 mA
+ DC
COMMON
*Shield: Earth ground (Connect at power supply only. Do not short to DC common)
PIN 1
Figure 6. Audiocom mode connections for WM1000 Intercom Station.

12 9
Method 2: Locally Powered Connection
Using this method, the intercom station is connected to the intercom line just
like any phantom-powered intercom station, except that a local power supply is
also connected. This local power supply is located right with the intercom
station and provides power for that station only. Since power loss on the
intercom lines is no longer an issue, the operating range is now limited only by
the audio transmission range, which is several miles. Another advantage to this
method is more stations can be connected to the intercom channels. When local
power is supplied to an intercom station, the station detects this and
automatically disconnects from the phantom power supply. As long as an
Audiocom power supply is located somewhere in the intercom system, the
proper terminating impedance will still be supplied for all stations.
All Locally Powered Intercom Stations (Dry Lines)
If all intercom stations are widely distributed, you can dispense with a main
power supply and use local power for each station. When no power is delivered
on the intercom channels, this is known as dry-line operation. However, since
an Audiocom power supply is not used, a line termination must be inserted in
each intercom channel for proper operation. Figure 5, page 13 shows an
example of dry line operation. The required termination components are shown
in Figure 8, page 14.
Dynamic-Mic Headset Connection
NOTE: For headset specifications, see page 16. For best results in noisy
environments, a noise canceling (directional or cardioid) microphone is highly
recommended.
1. Make sure DIP switch 4 is properly set for balanced or unbalanced
microphone. See Table 1 page 7.
2. Plug the headset into the headset connector. Power up the intercom
system and check the sidetone adjustment before placing the station in
operation.
Power- Up
Make sure any local power supplies are plugged in, and turn on the power
switches of any phantom power supplies.
NOTE: If you are using a large number of locally powered intercom stations,
you should activate their local power supplies before activating any phantom
power supply. Otherwise, you may get an overload indication on the phantom
supply. In this case, either reset the phantom supply, or momentarily turn it off,
then on.
Audiocom
Audiocom
WM2000
WM2000
GRN 1
GRN 1
RED 2
RED 2
Ch Select
Ch Select
Headset
Headset
Volume
Volu me
Talk
Talk
Listen
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Listen
Audiocom
Audiocom
WM2000
WM2000
GRN 1
GRN 1
RED 2
RED 2
Ch Select
Ch Select
Headset
Headset
Volume
Volume
Talk
Talk
Listen
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Listen
Audiocom
Audiocom
WM2000
WM2000
GRN 1
GRN 1
RED 2
RED 2
Ch Select
Ch Select
Headset
Headset
Volume
Volume
Talk
Talk
Listen
Listen
Audiocom
Audiocom
WM2000
WM2000
GRN 1
GRN 1
RED 2
RED 2
Ch Select
Ch Select
Headset
Headset
Volume
Volume
Talk
Talk
Listen
Listen
CHN1 CHN2
CLASS 2 WIRING 1.5A 24VDC
100-240 VAC60/50 HZ
MADE IN USA CHN1 CHN2
CLASS 2 WIRING 1.5A 24VDC
100-240 VAC60/50 HZ
MADE IN USA
CHANNEL 1 CHANNEL 2
Audiocom
WM1000
Headset
Volume
Talk
Listen
WM1000
WM2000
WM2000
WM2000
WM2000
WM2000
Audiocom
WM1000
Headset
Volume
Talk
Listen
WM1000
WM2000
WM2000
WM2000
WM2000
WM2000
PS2000L PS2000L
Figure 4. A two-channel intercom system using two PS2000L power supplies.
Each PS2000L is set to combine mode and it supplies power to one intercom
channel only. Each intercom channel is a separate party line, and total current
for each channel is limited to 2 amps. Note, both WM1000 and WM2000
Intercom Stations may be connected, depending on each locations’ need to
communicate with one or two intercom channels. For WM1000 connection
details, refer to Figure 6; for the WM2000 refer to Figure 7.

10 11
Sidetone Adjustment
The WM1000/2000 uses full-duplex audio (the same as conventional telephone
lines) in which the talk and listen audio are sent and received on the same wires.
Thus, when you talk on a channel, you will also hear your own voice back in the
headphones. If you are using open-ear style headphones, this could cause
unwanted feedback, since the microphone may pick up your returned voice
audio and re-amplify it. On the other hand, if you are using headphones that
completely enclose the ears, a certain amount of your own voice level is
desirable to overcome the muffled sensation when talking. The sidetone
adjustment is different for these two situations.
If you are using open-ear style headphones, adjust sidetone as follows:
1. Activate channel 1 as described in the operating instructions.
(Required only for the WM2000, the WM1000 is active on whichever
channel it is connected to.)
2. Activate talk and listen as described in the operating instructions.
3. Slowly increase the volume to maximum while talking into the
microphone.
4. Using a small, flat-bladed screwdriver, adjust channel 1 sidetone
trimmer (Figure 1) to minimize your voice level in the headphones.
5. For the WM2000 only, activate channel 2 and repeat the above steps
to adjust channel 2 sidetone.
6. Install the intercom station mounting screws after completing the
adjustments.
The station is now ready for use.
If you are using headphones that completely enclose the ears, adjust
sidetone as follows:
1. Activate channel 1 as described in the operating instructions.
(Required only for WM2000, the WM1000 is active on whichever
channel it is connected to.)
2. Activate talk and listen as described in the operating instructions.
3. Set the volume control to the normal listening level for intercom audio.
4. While talking into the microphone, use a small, flat-bladed
screwdriver to adjust the channel 1 sidetone trimmer (Figure 1) so that
you can hear your own voice in the headphones at an acceptable level.
5. For the WM2000 only, activate channel 2 and repeat the above steps to
adjust the channel 2 sidetone.
6. Install the intercom station mounting screws after completing the
adjustments.
The station is now ready for use.
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
PS2000L
RESET
1
R
2
Audiocom
WM2000
GRN1
RED2
ChSelect
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN1
RED2
ChSelect
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN1
RED2
ChSelect
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN1
RED2
ChSelect
Headset
Volume
Talk
Call
Listen
PS2000L
WM2000
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
WM1000
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
WM1000
WM2000
WM2000
WM2000
500 METERS
Figure 2. A two-channel intercom system using a PS2000L Power Supply set to
isolate mode. In isolate mode, each intercom channel is a separate party line,
and total current for each channel is limited to 1 amp. Note, both WM1000 and
WM2000 stations may be connected, depending on each locations’ need to
communicate with one or two channels. WM1000 stations may be connected to
either channel one or two. Also note, locally powered stations may be
connected. This is recommended when stations are installed at remote locations.
Since the PS2000L provides termination for the intercom channels, no user-
installed termination is required. For WM1000 connection details refer to
Figure 6; for the WM2000, refer to Figure 7.
PS2000L
RESET
1
R
2
Audiocom
WM1000
Headset
Volum e
Talk
Call
Listen
Audiocom
WM1000
Headset
Volum e
Talk
Call
Listen
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
Audiocom
WM1000
Headset
Volum e
Talk
Call
Listen
Audiocom
WM1000
Headset
Volum e
Talk
Call
Listen
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
WM1000
WM1000
WM1000
WM1000
WM1000
WM1000
Figure 3. A single-channel intercom system using one PS2000L with WM1000
Intercom Stations. The PS2000L may be set to either combine or isolate mode.
In combine mode, all intercom stations talk on a single party line, and total
current for the channel is 2 amps. In isolate mode, one string of intercom
stations is operated as channel one, and the other string is operated at channel
two. There is no communication between the separate channels, and the total
current per channel is 1 amp. For WM1000 connection details, refer to Figure
6.