Telex Audiocom WM1000 User manual

Telex®
User Instructions
Model WM1000 / WM2000
Wall Mount Intercom Stations
Audiocom®Intercom Systems
Volume
WM2000
GRN 1
RED 2
Ch Select Talk
Call
Listen
Headset
TM
WM2000 Shown
®

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 WM1000 / WM2000 Wall Mount In-
tercom 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.
2

Table of Contents
Description .............4
Features ..............5
Installation .............6
Unpacking ............6
Configuration Switch Pre-check ........6
Intercom Channel Connections ........7
Dynamic-Mic Headset Connection .......9
Power-Up ............10
Sidetone Adjustment ..........10
Operation .............17
Channel Select (WM2000 Only) ........17
Receiving Calls ...........17
Calling an Intercom Channel ........17
Specifications ............18
Factory Service and Parts Information .......20
3

Description
The WM1000 and WM2000 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 ac-
cess 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 tele-
phone handset can be left at the station.
4
Audiocom®
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, WM2000 shown (See numbered features list)

Features
1. ChannelSelectSwitch(WM2000Only):Usedtoswitchbetweenintercomchan-
nelsoneandtwo.Theswitchlightsgreenforchanneloneandredforchanneltwo.
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 in-
coming calls.
4. Intercom Talk Key: Both momentary (push-to-talk) and latching (hands-free
talk) are possible. Additionally, the WM1000 / WM2000 has a feature called
"mic kill receive" which lets an operator at a remote master station (such as the
US2000A) turn off the talk key.
5. Dynamic-Mic Headset Connector: 4-pin male XLR connector accepts headsets
with monaural headphones and either a balanced or unbalanced dynamic micro-
phone.
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 fol-
lowing features:
CallBeep:Anoptionalcallbeeptonecanbeusedforincomingcallnotification.
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 inter-
com systems that use DC call signaling.
9. Connections Terminal Block: Used to connect intercom channel(s) and an op-
tional 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.
5
* Brand names mentioned are the property of their respective companies.

Installation
Unpacking
Each WM1000 / WM2000 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 WM1000 or WM2000 Intercom Station
1 Warranty and registration card
1 User Instructions
4 Mounting Screws
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 1lists the
switch descriptions and factory default settings. Figure 1shows the locations of the
switches.
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 / WM2000 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 po-
sition.
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 open (default) position. If the specifications indicate
an unbalanced microphone set DIP switch 2 to closedn.
6
Audiocom®

Balanced/UnbalancedSwitch(SW-1)
This switch is set at the factory to the balanced (BAL) position for use with Audio-
com intercom channels. Set the switch to the unbalanced (UNBAL) position for use
with a Clear-Com intercom system. Be sure and use the appropriate connection in-
formation based on how you have this switch set.
IntercomChannelConnections
Important!
The following paragraphs and illustrations describe installation of the WM1000 /
WM2000 in an Audiocom Intercom System. To use the WM1000 / WM2000 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 (page19).
7
Switch
Number Description Settings Open=Off; Closed=On Default Setting
1Not used Don't care Open
2Call signal method Closed: DC
Open: Audiocom Open
3Incoming call beep Closed: Disabled
Open: Enabled Open
4Microphone type Closed: Unbalanced
Open: Balanced Open
5Not used Don’t care Open
6Not used Don’t care Open
7Not used Don’t’ care Open
8Not used Don’t care Open
Table 1. Configuration Switch Settings

General Information
☞After connecting intercom stations as described below, and before installing the
mounting screws, connect a headset and perform the sidetone adjustment as de-
scribed on page 10.
The WM1000 and WM2000 mount in a standard two-gang electrical box. Some ex-
ample intercom system configurations are shown in Figures 2through 5, pages 12
through 14. Detailed connections for the WM1000 and WM2000 are shown in Fig-
ures 6and 7, pages 15 and 16. There are two basic methods for connecting the
WM1000 and WM2000: 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 /
WM2000 over the same wires. The advantage of this setup is simplicity of connec-
tion. Also, the Audiocom power supply automatically provides what is known as a
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 phan-
tom power method is that some operating power is lost over very long intercom ca-
bles, 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,
phantom power will be sufficient. The actual distance over which power can be de-
livered can vary, however, depending on the number of stations connected. Increasing
the number of stations will reduce the distance. Note that 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 pow-
ered as described below.
8
Audiocom®

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 con-
nected. This local power supply is located right with the intercom station and pro-
vides 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 that more stations can be
connected to the intercom channels. When local power is supplied to an intercom sta-
tion, 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 inter-
com 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 chan-
nel for proper operation. Figure 5, page 14 shows an example of dry line operation.
The required termination components are shown in Figure 8, page 16.
Dynamic-Mic Headset Connection
☞For headset specifications, see page 18. For best results in noisy environments, a
noise canceling (directional or cardioid) microphone is highly recommended.
1. Make sure that DIP switch 4 is properly set for balanced or unbalanced micro-
phone. 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.
9

Power-Up
Make sure any local power supplies are plugged in, and turn on the power switches
of any phantom power supplies.
☞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.
Sidetone Adjustment
The WM1000 and WM2000 use full-duplex audio (the same as conventional tele-
phone 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 here your own voice back in
the headphones. If you are using open-ear style headphones, this could cause un-
wanted 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 muf-
fled sensation when talking. The sidetone adjustment is different for these two situa-
tions.
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 the channel 1 sidetone trimmer (Fig-
ure 1) to minimize your voice level in the headphones.
5. For the WM2000 only, activate channel 2 and repeat the above steps to adjust
the channel 2 sidetone.
10
Audiocom®

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
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. 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.
11

12
Audiocom®
LOCAL POWER
12 to 15 VDC, 65 to 150 mA
PS2000L
RESET
1
R
2
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
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 one 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 that 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 that 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
Volume
Talk
Call
Listen
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
Audiocom
WM1000
Headset
Volume
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 isolated 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 as 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.

13
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
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
CHN 1 CHN 2
CLASS 2 WIRING 1.5A 24VDC
100-240 VAC 60/50 HZ
MADE IN USA
CHN 1 CHN 2
CLASS 2 WIRING 1.5A 24VDC
100-240 VAC 60/50 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 that 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.

14
Audiocom®
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
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
Audiocom
WM2000
GRN 1
RED 2
Ch Select
Headset
Volume
Talk
Call
Listen
LINE
TERMINATION
Audiocom
WM1000
Headset
Volume
Talk
Call
Listen
WM1000 WM2000 WM2000
Audiocom
WM1000
Headset
Volume
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.

15
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
CableType: 22AWG Stranded, 2-Pair Twisted-wire, with Shield
TO ADDITIONAL
SINGLE-CHANNEL STATIONS
OPTIONAL LOCAL
POWER SOURCE
12 to 15 VDC, 65 to 150 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 a WM1000 Intercom Station

16
Audiocom®
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
CableType: 22AWG Stranded, 3-Pair Twisted-wire, with Shield
Channel 2 Audio low / Power
Channel 2 Audio high / Power
OPTIONAL LOCAL
POWER SOURCE
12 to 15 VDC, 65 to 150 mA
+ DC
COMMON
Channel 1 Audio high / Power
*Shield: Earth ground (Connect at power supply only.
Do not short to DC common)
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.)

Operation
Channel Select (WM2000 Only)
Tap the Ch Select key to select channel 1 or 2. The key is green when channel 1 is se-
lected 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 6).
☞WM2000 only: incoming call indication is provided only for the currently se-
lected channel.
2. Turn on the Talk and Listen keys and begin your conversation. Turn the keys off
when finished.
☞You can turn the talk and listen keys on in either momentary or latched mode.
For momentary operation, press and hold the key. 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.
17

Specifications
General
Power Requirements:
Phantom Power: 24 VDC nominal (12 to 30 VDC), 65 to 150 mA
Local Power: 12 to 15 VDC, 65 to 150 mA
Dimensions: Mounts in 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
Mic-Kill Detect Frequency: 24 kHz ±800 Hz, 100 mVrms
Noise Contribution: less than -70 dB
Common Mode Rejection Ratio: greater than 50 dB
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
18
Audiocom®

Intercom Channel, Unbalanced Mode (SW1 set to UNBAL position)
Output Level: 1 Vrms ±10%
Input Impedance: 150 ohms
Bridging Impedance: greater than 10,000 ohms
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
19

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: [phone]
(Collect calls not accepted)
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: [phone]
(Collect calls not accepted)
20
Audiocom®