Bogen BOMDMU User manual

50 Spring Street, Ramsey NJ 07446, USA
Te: 201-934-8500; Fax: [phone]; www.bogen.com
BOMDMU
Messaging and Call Stacking System
User's Manual
© 2012 Bogen Communications, Inc.
All rights reserved. Specifications subject to change without notice.
54-2213-01A 1208

General Safety Instructions
Always follow these basic safety precautions when using the system:
1. Read carefully and understand all instructions.
2. Follow all warnings and instructions marked on the product.
3. DO NOT block or cover ventilation slots and openings.
4. DO NOT place the product in a closed enclosure or cabinet unless proper
ventilation is provided.
5. Never spill liquid on the product or drop objects into the ventilation slots and
openings. Doing so may result in serious damage to the components.
6. Repair or service must be performed by a factory authorized repair facility.
7. A UL/CSA approved power pack is provided.
8. DO NOT staple or otherwise attach the power supply cord to building surface.
9. DO NOT use the product near or in wet or damp places, such as wet basements.
10. DO NOT use extension cords. Install within six feet of a grounded outlet
receptacle.
11. DO NOT install during lightning storm.
12. Never touch un-insulated wires or terminals unless the unit is disconnected from
both power and the rest of the phone system.
13. Use Caution when installing or modifying configuration switches or control lines.
14. The unit must be securely attached to a wall board, rack or table mounted.
CAUTION: If any wiring from the system leaves the premises,
you must use proper electrical protectors.
Regulations:
FCC (Part 15) Radio Frequency Interference
The BOMDMU generates and uses radio frequency energy and if not installed and
used in strict accordance with the manufacturer's instructions, may cause interference
to radio and television reception. Unit complies with the limits for Class A devices in
accordance with the specifications in Subpart J of Part 15 of the FCC Rules. This
testing is designed to provide reasonable protection against such interference.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause interference to radio or television reception,
which can be determined by turning the unit off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
Reorient the radio or TV receiving antenna.
Relocate the unit with respect to the radio or TV receiver or vice-versa.
Plug the unit into a different outlet so that it and the radio or TV receiver are
on different branch circuits
If necessary, the user should consult the dealer or an experienced
radio/television technician for additional suggestions.
Limited Warranty; Exclusion of Certain Damages
The BOMDMU Messaging and Call Stacking System is warranted to be free
from defects in material and workmanship for one (1) year from the date of sale to
the original purchaser. Any part of any Bogen product covered by this warranty
that, with normal installation and use, becomes defective (as confirmed by Bogen
upon inspection) during the applicable warranty period, will be repaired or
replaced by Bogen, at Bogen’s option, provided the product is shipped insured
and prepaid to: Bogen Factory Service Department, 50 Spring Street, Ramsey,
NJ 07446, USA. Repaired or replacement product will be returned to you freight
prepaid. This warranty does not extend to any of our products that have been
subjected to abuse, misuse, improper storage, neglect, accident, improper
installation or have been modified or repaired or altered in any manner
whatsoever, or where the serial number or date code has been removed or
defaced.
THE FOREGOING LIMITED WARRANTY IS BOGEN’S SOLE AND EXCLUSIVE
WARRANTY AND THE PURCHASER’S SOLE AND EXCLUSIVE REMEDY.
BOGEN MAKES NO OTHER WARRANTIES OF ANY KIND, EITHER EXPRESS
OR IMPLIED, AND ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED AND
EXCLUDED TO THE MAXIMUM EXTENT ALLOWABLE BY LAW. Bogen's
liability arising out of the manufacture, sale or supplying of products or their use or
disposition, whether based upon warranty, contract, tort or otherwise, shall be
limited to the price of the product. IN NO EVENT SHALL BOGEN BE LIABLE
FOR SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING,
BUT NOT LIMITED TO, LOSS OF PROFITS, LOSS OF DATA OR LOSS OF
USE DAMAGES) ARISING OUT OF THE MANUFACTURE, SALE OR
SUPPLYING OF PRODUCTS, EVEN IF BOGEN HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES OR LOSSES. Some States do not allow the
exclusion or limitation of incidental or consequential damages, so the above
limitation or exclusion may not apply to you. This warranty gives you specific legal
rights, and you may also have other rights which vary from State to State.
Products that are out of warranty will also be repaired by the Bogen Factory
Service Department -- same address as above or call 201-934-8500. The parts
and labor involved in these repairs are warranted for 90 days when repaired by
the Bogen Factory Service Department. All shipping charges in addition to parts
and labor charges will be at the owner's expense. All returns require a Return
Authorization number. For most efficient warranty or repair service, please include
a description of the failure.
Products manufactured and labeled by other companies may be covered by
warranties offered by such companies. Please call Bogen Customer Service or
refer to product packaging for manufacturer’s warranty for non-Bogen branded
products.
12/2008

NOTES
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Table of Contents
1. OVERVIEW ........................................................................................ 2
1.1 Features and Capabilities................................................................ 2
1.2 General Specifications .................................................................... 3
2. INSTALLATION & CONFIGURATION ..................................................... 4
2.1 Installation Steps ............................................................................. 4
2.2 Hardware Description...................................................................... 4
2.2.1 Status LED Indicators...................................................... 5
2.2.2 Power Input ..................................................................... 6
2.2.3 Audio/Control Inputs, Paging Channels 1-3 .................... 6
2.2.4 Port Configuration Switch, Channels 1-3, PRI, MSG ...... 6
2.2.5 Priority Audio/Control Input ............................................. 7
2.2.6 Priority Mode Switch........................................................ 7
2.2.7 Messaging Audio/Control Input ....................................... 7
2.2.8 Messaging Mode Switch…………………………………….7
2.2.9 Background Music Input Volume..................................... 7
2.2.10 Background Music Input Connector ................................ 8
2.2.11 Audio Output Mode Switch.............................................. 8
2.2.12 Output Volume ................................................................ 8
2.2.13 System Audio/Control Connector .................................... 8
2.2.14 Configuration Switches.................................................... 9
2.2.15 Messaging Playback Auxiliary Interface .......................... 13
2.2.16 Paging Control and Status Auxiliary Interface ................. 13
3. PAGE STACKING, FEEDBACK ELIMINATION OPERATION................. 14
3.1 Page Recording............................................................................... 15
3.2 Record Activation Methods ............................................................. 15
3.3 Playback ........................................................................................ 15
4. QUEUE ........................................................................................ 16
5. PRIORITY ........................................................................................ 16
6. MESSAGING, PRE-RECORDED............................................................. 16
7. BACKGROUND MUSIC INPUT ............................................................... 17
8. AUDIO OUTPUT ...................................................................................... 17
9. LIMITED WARRANTY; Exclusion of Certain Damages............................ 21
Shipping Container Contents
The following items should be found in the container of BOMDMU:
▪BOMDMU System
▪Installation and User Guide
▪Mounting screws
▪Wall mounted power pack, 12V DC @ 1 Amp

1. OVERVIEW
1.1 Features and Capabilities
The BOMDMU is a comprehensive system that combines Page Stacking,
Feedback Elimination, Pre-Recorded Messaging and Background Music
control into a single device.
PAGE STACKING/FEEDBACK ELIMINATION: For busy overhead paging
systems, the BOMDMU offers 3 channels of page stacking and feedback
elimination. Each channel can record and temporarily store up to 16 pages
or 4 minutes of audio. Page input channels can record simultaneously, and
while the system is playing.
PRIORITY PAGING: For emergencies, the BOMDMU offers a priority input
that overrides the stacking and messaging functions and provides
immediate, real-time access to the paging system.
PRE-RECORDED MESSAGES: For security and general public address
messaging, a pre-recorded messaging sub-system has been included.
Access both Record and Play functions of up to 99 messages/8 minutes of
audio from an extension on your host telephone system. Ten (10) start
contacts have also been provided to trigger messages from external devices
such as sensors or alarm systems.
BACKGROUND MUSIC: To keep everything in harmony, the BOMDMU also
includes a background music input. This allows playback of your favorite
music source over the paging system. When a page or message is played,
the background music will be muted and the announcement will be heard
loud and clear.
BOMDMU Connection to Override to UTI312
2

Appendix
BOMDMU Connection to Override to PCMTIM
BOMDMU Connection to Override to UTI1
1.2 General Specifications
AUDIO
Bandwidth 100 Hz to 8 kHz
Page Input 3, RJ12 connector, Station Port/Dry Loop/Loop Start
Priority Input 1, RJ12 connector, Station Port/Dry Loop/Loop Start
Messaging Input 1, RJ12 connector, Station Port/Dry Loop/Loop Start
Background Music
Input
Line level input with level control
Page output 1, RJ12 connector, 8-ohm power/600-ohm line level
(switch-selectable), adjustable
PAGE STACKING
Message repeat play one or two times, DIP switch selectable
Delay between
messages
1s, 3s, 5s, 10s DIP selectable
Stack up to 16 messages per input
DTMF Store/forward (0,2,3 or 4 tones) DIP selectable
Pre-Page Tone DIP selectable
POWER
Power Pack 12V DC @ 1 Amp, UL and CSA
MEMORY
Type FLASH
Page Stacking 4 minutes per page input channel
Messaging 8 minutes
MESSAGE CONTROL
# of messages 99
Record Control DTMF control from messaging input
Play Control Triggered from DTMF on messaging input or start
contacts (10)
PAGE CONTROL
Priority Control contact is offered on the Priority Input RJ12
connector
Page Inputs 3, Page Input RJ12 connector. Each input answers
(loop, audio sense, DTMF)
STATUS OUTPUTS Solid State Relay contacts 24V DC @ 100 mA max.
Playing Contact Offered on the Page Output RJ12 connector
Record Contact Offered on each Page Input RJ12, as well as the
Message Input RJ12
PACKAGE
Chassis: Rack mount (1 RU)
Material: 18 gauge cold rolled steel, painted with silkscreen
18 3

2. INSTALLATION & CONFIGURATION
This section provides complete instructions for mounting the BOMDMU in a rack
or on a table. It also illustrates all interface requirements to auxiliary equipment,
including inputs and outputs. Configuration switch settings are provided.
2.1 Installation Steps
These are the general steps for installation:
1. Find a space in a rack or on a table. Mount the unit to the selected place
with its wiring at least 18” away from the power supply or other equipment
that generates electrical noise. Secure unit using the supplied mounting
screws.
2. Make sure there is a standard electrical outlet into which you can plug the
power pack. This outlet should NOT be controlled by a wall switch.
3. Make cable connections from the BOMDMU to the PBX or audio source
and the Paging system,
4. Set DIP switches to the desired operation.
5. Connect the power supply. System OK LED should illuminate GREEN.
6. Test unit operation.
2.2 Hardware Description
FRONT
The BOMDMU is a standard 1RU 19” rack mount chassis.
The front panel of the BOMDMU provides user indications of the system
status via LEDs. The description of each LED can be found in section 2.2.1
of this manual.
Configuration switches are also accessible on the front panel of the unit.
The description of the various user configurable settings can be found in
section 2.2.14 of this manual.
7. BACKGROUND MUSIC INPUT
The BOMDMU allows for a background music source to be mixed with pages
and pre-recorded messages. Background music is muted when pages or pre-
recorded messages are played to the audio output. The BGM Level control
allows you to optimize the level music sent to the audio output.
8. AUDIO OUTPUT
The audio output of the BOMDMU is the audio interface for your zone controller,
amplifier or public address system. All audio from the paging channels, priority
input, messaging system and BGM input is routed to this output. The BOMDMU
manages stored pages on a first in, first out basis. This means that pages will be
played in the order they were successfully completed and or triggered,
independent of the particular input. Only the priority input has the ability to
interrupt the playback queue. In the case of a priority page, the system will pause
the playback queue during the priority page, then continue when the page is
complete.
4 17

4. QUEUE
The BOMDMU incorporates a playback queue to manage the order that
messages play. This queue will manage up to 32 pages. Pages are put into the
queue on a first in, first out basis. The queue is compatible with pages from any
of the three page channels and/or the messaging input. The priority input offers
live, or direct, access to the output of the system. A priority page will pause the
playback queue. When the priority session completes, the queue will continue
from where it left off.
5. PRIORITY
The BOMDMU offers a Priority input to gain immediate access to the public
address system. Activation of priority halts the playback of recorded pages.
When the priority page is completed, the BOMDMU will resume playback from
the beginning of the message that was interrupted. Priority Activation methods
include Analog Station, Dry Loop and Loop Start. A valid connection via any of
these methods provides direct access to the system. Status of the Record
Activation switches is not relevant.
6. MESSAGING, PRE-RECORDED
The BOMDMU offers a pre-recorded messaging system for quick and easy
access to standard or frequently used pages. This system allows messages to be
recorded and permanently stored in FLASH memory. Playback is provided via
DTMF command or contact closure. The messaging portion of the BOMDMU can
store up to 99 messages in 8 minutes of memory.
DTMF Commands
Code Name Description
# End Use this function to stop recording or exit a
command
*0 Stop Stop playing all triggered messages
*3xx Delete Delete message at location xx
*5xx -or- xx Play Play message at location xx to the audio output
*6xx Review Listen to a message through the handset. Audio is
NOT routed to the audio output
*7xx Record Record message into location xx. Recordings may
only be made to empty message locations. To
update a previously recorded message, make sure
to delete it first.
Connect to the messaging system with the desired mode, analog station, dry
loop or loop start. The Message Off Hook LED indicates that you are connected
to the system in Loop Start or Analog Station mode.
A steady tone indicates a correctly executed and accepted command. A fast
busy signal indicates an incorrectly executed command.
BACK
The back panel of the BOMDMU provides all electrical connections to the
device. The connector type and signal descriptions are detailed later in this
manual.
Individual configuration of each audio input / output port is provided next to
each audio input connector.
Volume controls are provided for the BGM input and the audio output.
Flanges are provided on each side of the back panel of the BOMDMU to
provide strain relief to all the wiring routed to the BOMDMU.
2.2.1 Status LED Indicators
All Status Indicators are located on the front panel of the unit. The
different groups of LED indicators are described below:
2.2.1.1 System
The System indicators are global indicators that indicate that a particular
function is active on any, or all, of the inputs on the system.
System OK LED – Green, indicates unit is ON. Flashing indicates an
error condition, contact the factory for more information should this
occur.
Recording LED - Red, indicates that a recording session is active on
any one of the paging inputs.
Playing LED - Green, indicates that the audio output of the BOMDMU
is active due to a page playing back, or the priority input being active.
Busy LED - Yellow, indicates that any one of the paging inputs is
recording, playing, or in a delay mode. This LED is also active when
a priority announcement is being made.
2.2.1.2 Message Input
Messaging Input Off Hook LED - Yellow, indicates the messaging
system is being accessed via a phone circuit. (Loop current flowing)
Messaging Input Level LED - Yellow, indicates audio signal is present
on the Message Input.
16 5

2.2.1.3 Priority Onput
Priority Input Off-Hook LED - Yellow, indicates the priority channel is
being accessed via a phone circuit. (Loop current flowing)
Priority Input Active LED - Yellow, indicates the priority channel is
active.
2.2.1.4 Paging Input Channels (Channels 1,2,3)
Off-Hook LED - Yellow, indicates the priority channel is being accessed
via a phone circuit. (Loop current flowing)
Audio Sense LED - Yellow, indicates audio signal is present on that
particular Page port.
Record LED - Red, indicates that the particular Paging channel is
recording a message.
Play LED - Green, indicates that the particular Paging channel is
playing a message.
2.2.2 Power Input
Unit requires 12 VDC @ 1 Amp via the barrel connector. Only use the
factory supplied power pack. The chassis is connected to the negative
side of power supply.
2.2.3 Audio/Control Input, Paging Channels 1 - 3
RJ12 style connector, 6 position. All pages to be recorded are input to
the device through these connectors.
1. Abort, stops and deletes the recording when
connected to Ground (Pin 5).
2. Record input, connect to Ground(Pin 5) to
activate. Unit records for duration of closure.
3. Audio, ring/return.
4. Audio, tip/signal.
5. System Ground, (power return).
6. Not used.
2.2.4 Port Configuration Switch, Paging Channels 1 – 3, Priority
Input, Message Input
A three-position slide switch is provided for each of the five inputs from
the paging system: Channel 1, 2, 3, Priority, and Message. The switch
configures the particular port to meet the requirements of the paging
system.
Analog Station - LEFT Position. Impedance 900-ohm, voltage for ring
trip 75 to 105V (20 to 60Hz).
Dry Loop - Center Position. Configures audio input for 600-ohm, line
level (-10 dB nominal).
Loop Start - RIGHT Position. Configures priority audio input for 900-
ohm and supplies 24V DC talk battery. Compatible with loop start trunk
ports.
3.1 Page Recording
Upon receiving a valid recording signal, the BOMDMU will start recording at
the beginning of the memory until the page is complete. While this page is
playing, new pages can still be recorded. Multiple pages will be recorded in
series until the playing message has completed its play routine.
Multiple channels may be recording incoming pages at the same time.
Playback order of pages is based on when the recording process is
complete. For example, if a long message is being recorded on channel 1,
and during that process a short message is recorded and completed on
channel 2, the playback order will be the message on channel 2 then the
message on channel 1.
3.2 Record Activation Methods
There are several methods to initiate automatic record mode on the
BOMDMU. The activation mode will be selected by the Setup Switches upon
power up. It cannot be changed during normal operation.
Loop Current detect - Setup Switches 1=OFF, 2=OFF
If an input’s input configuration switch is set for loop start mode, the
BOMDMU will source the talk battery (24V DC) to the ring and tip, and then
sense the loop current when phone goes off hook and start the recording
process for the duration of the page. Valid for Analog Station and Loop Start
modes.
Audio Sense - Setup Switches 1=OFF, 2=ON
For record activation without a separate switch closure or loop current. The
BOMDMU will start recording when the audio sensor goes active and will
stop when the audio sensor is inactive for three seconds. Valid for Analog
Station, Loop Start and Dry Loop modes.
DTMF Activation - Setup Switches 1=ON, 2=OFF
For record activation without a separate switch closure and perhaps noisy
audio lines. The BOMDMU will start recording when it “sees” a valid DTMF
tone and will stop when the audio sensor is inactive for three seconds. Valid
for Analog Station and Loop Start modes. The DTMF tone used to activate
the recording will be stripped and not output when the message is played.
Manual Recording - Available in all modes. Typically associated with Dry
Loop mode, this enables the BOMDMU to begin recording with a switch
closure between pins 2 and 5 of the RJ12 connector of a particular channel.
3.3 Playback
The BOMDMU can be configured to automatically playback pages after their
record process has completed. This mode is configured by setting Setup
Switch 8 to OFF.
The BOMDMU may be configured for manual or switch closure playback
(Setup Switch 8=ON) when you want full control of when pages will
playback. Playback is triggered via a momentary closure (100ms) between
pins 1 and 5 of the Paging Control and Status Auxiliary Interface.
6 15

6 Not Used Not Used
7 Busy Common Common for the busy relay
8 Busy Relay Activates when system is recording or
playing a message.
9 Playing Common Common for the Playing Relay.
10 Playing Relay Activates when system is playing.
11 Recording Common Common for the Recording Relay.
12 Recording Relay Activates when the system is
recording.
3. PAGE STACKING, FEEDBACK ELIMINATION OPERATION
The BOMDMU offers 3 channels of page stacking, intended for busy paging
systems with multiple inputs. Each channel performs the following functions:
1. It eliminates feedback by recording the incoming page(s), then playing them
back after the user “hangs up”, eliminating any feedback loop.
2. It is able to repeat each page allowing for better intelligibility in a noisy
environment.
3. It is capable of stacking up to 16 incoming pages per channel by recording
incoming pages while playing back previously recorded ones on a first-in first-
out basis.
Constraints:
Each page is allowed a maximum of 1 minute recording time. Pages
exceeding this will be aborted and a busy back tone is generated.
Recordings that reach the end of memory are considered incomplete.
These pages are aborted and a busy back tone is generated. If the
memory is filled and a new recording command is offered, the
BOMDMU will not go into record mode and a busy back tone will be
output to tell the user that the system is not available.
The recorded message must be a minimum of one second in length.
Any message shorter than this will be aborted.
The BOMDMU aborts pages that are comprised of 3 or more seconds of
silence. The page is deleted and a busy back tone is generated.
Other important features include the ability to Record/Regenerate, or Block
DTMF tones for use in zone controller applications.
The BOMDMU is designed to run in both Automatic and Manual modes. For
paging applications the Automatic mode is the most widely used. This mode
requires minimum installation time since it is the factory’s default setup. RJ12
connectors are used for Audio inputs and outputs. Where logical, certain control
signals are also provided on the individual RJ12 connectors associated with each
input.
2.2.5 Priority Audio/Control Input
RJ12 style connector, 6 position. Priority pages are input to the device
through this connector.
1. Not used.
2. PRIORITY input, connect to Ground (Pin 5) to
activate. Priority active for duration of closure.
3. PRIORITY Audio, ring/return.
4. PRIORITY Audio, tip/signal.
5. Ground. (power return).
6. Not used.
2.2.6 Priority Mode Switch
Analog Station – LEFT Position. Impedance: 900-ohm, voltage for ring
trip 75 to 105V (20 to 60 Hz).
Dry Loop – CENTER Position. Configures audio input for 600-ohm,
line-level (-10 dB nominal).
Loop Start – RIGHT Position. Configures priority audio input for 900-
ohm and supplies 24V DC talk battery. Compatible with loop start trunk
ports.
2.2.7 Messaging Audio/Control Input
Input, RJ12 style connector, 6 position. Operation of the messaging
portion of the system is provided through this interface.
1. Not used.
2. Not used.
3. Audio, ring/return.
4. Audio, tip/signal.
5. Not used.
6. Not used.
2.2.8 Messaging Mode Switch
Analog Station – LEFT Position. Impedance: 900-ohm, voltage for ring
trip 75 to 105V (20 to 60 Hz).
Dry Loop – CENTER Position. Configures audio input for 600-ohm,
line-level (-10 dB nominal).
Loop Start – RIGHT Position. Configures priority audio input for 900-
ohm and supplies 24V DC talk battery. Compatible with loop start trunk
ports.
2.2.9 Background Music Input Volume
Controls the background music input volume level delivered to the audio
output. Adjusting this input clockwise increases the level, and counter-
clockwise rotation decreases the level of the background music.
14 7

2.2.10 Background Music Input Connector
RCA jack, Input audio level should be set to a nominal level of 0dBv, or
less. Tip is audio signal and sleeve is audio return.
Any audio input at this port will be fed through the system to the audio
output whenever the system is idle.
2.2.11 Audio Output Mode Switch
A two position slide switch allows the user to configure the audio output
to match the needs of their downstream equipment.
The RIGHT position sets the output to line level (+4 dB / 600-ohm). Use
this position as default.
The LEFT position sets the output to power level (500 mW / 8-ohm).
Use this for longer runs, or if not enough level can be reached with the
line level output.
2.2.12 Output Volume
Controls the audio output volume level delivered to the paging system. It
is shipped with 1:1 gain factory set.
Adjusting this input clockwise increases the level, and counter-clockwise
rotation decreases the level of the device
2.2.13 System Audio/Control Connector
Output, RJ12 style connector, 6 position. All audio from the BOMDMU
is output through this port
1. Not used.
2. Playing Relay, Normally Open.
3. Audio Return.
4. Audio Signal.
5. Playing Relay, Common.
6. Not used.
The playing relay contacts available on this connector are paralleled
with the connections on the Paging Control and Status Auxiliary
Interface, positions 9 and 10.
11 12
*1 second
3 seconds
5 seconds
Delay Between Plays
To make the page sequence more intelligible,
a pause can be inserted between each
message in the playback sequence as well as
between any repeats of each message.
10 seconds
2.2.15 Messaging Playback Auxiliary Interface
Top row of 12 inputs on the Auxiliary Interface. This interface allows
playback of pre-recorded messages through a momentary closure
(100ms). Each closure between a Play input and Ground will play the
corresponding message one time. Multiple closures on a single input or
several inputs will queue the messages and the system will play them in
the order received.
12 position Euro-style, two piece, pluggable type.
Pin Name Description
1 Ground Common
2 Play 1 Plays message 1 when connected to ground
3 Play 2 Plays message 2 when connected to ground
4 Play 3 Plays message 3 when connected to ground
5 Play 4 Plays message 4 when connected to ground
6 Play 5 Plays message 5 when connected to ground
7 Play 6 Plays message 6 when connected to ground
8 Play 7 Plays message 7 when connected to ground
9 Play 8 Plays message 8 when connected to ground
10 Play 9 Plays message 9 when connected to ground
11 Play 10 Plays message 10 when connected to ground
12 Not Used Not Used
2.2.16 Paging Control and Status Auxiliary Interface
Bottom row of 12 inputs on the Auxiliary Interface. Allows manual
access to many of the common inputs and status outputs of the system.
12 position Euro-style, two piece, pluggable type.
Pin Name Description
1 Ground Common
2 Not Used Not Used
3 Priority Initiates priority page when connected
to ground.
4 Stop Stops any currently playing message
when connected to ground.
5 Play Plays next message in queue when
connected to ground.
8 13

4
*Strip only tones at
the start of a recorded
page.
DTMF Tone Stripping Method
This setting determines how and where the
DTMF tones coming from audio input,
during a recording, are processed. Tones
can be stripped only at the beginning of the
message or at the middle of the message.
If the tones recorded page are stripped in
the middle of the message all recorded
information preceding those tones will be
deleted, resetting the message start.
Strip any tones in
message and restart
recording message.
5 6
*Unlimited number of DTMF tones
4 tones
3 tones
DTMF Allotment
Most paging systems
require a limited number
of tones to be recorded
because of zone
controlling equipment. If
the selected number of
tones is exceeded the
BOMDMU will abort that
particular recording.
2 tones
7
*Enable
# # Abort
This would allow a caller to abort a page being recorded
by pressing the “#” button two times within one second.
The recording will immediately be aborted and the busy
back tone sent to the input. A single “#” sign during the
recording will not have any effect.
Disable
8
*Auto Play
Play Mode
Allows for automatic playback of page after recording.
Manual
9
*Disable
Pre-page Tone
A pre-recorded tone can be output prior to message
playback. This is used to alert listeners that a message is
about to be played. This tone will be output before each
message in the playback queue but not before the
repeated plays.
Enable
10
* Play once
Number of Plays
The number of times which each message plays
during the playback sequence. If multiple messages
were recorded into the queue, each message will
play this number of times.
Play twice
2.2.14 Configuration Switches
12 position DIP Switch: UP position is OFF, DOWN
position is ON. * indicates factory Default Setting.
Settings are scanned on power up. Power must be
cycled for changes to take effect.
1 2
*Off Hook (Loop Current) - The
system will record when the
system senses loop current.
Audio Sensor - The system will
start recording when the audio
sensor goes active and will
stop when the audio sensor is
inactive for 3 seconds.
DTMF - The system will start
recording when it detects a
valid DTMF tone and will stop
when the audio sensor is
inactive for 3 seconds.
Record Activation Method
The method with which the
user will enter the record
mode.
Not in use.
NOTE: Record Input activation is always available regardless of switch
settings. A maintained contact closure on any channel’s record input will
start the recording process on that channel for the duration of the closure.
3
*Active
Not Active
DTMF Tone Stripping
DTMF tones recorded at the beginning of an audio
message are typically used for zone control
purposes. A repeated page should not have the zone
control tones on the front end of the second page
because the zone controller is already routed,
therefore these tones will be stripped on the repeat of
a page. DTMF tones at the beginning of the page
would be handled in this fashion. Any DTMF tones
recorded in the middle of the message would be
recorded and played back in the typical manner.
12 9

10 11

4
*Strip only tones at
the start of a recorded
page.
DTMF Tone Stripping Method
This setting determines how and where the
DTMF tones coming from audio input,
during a recording, are processed. Tones
can be stripped only at the beginning of the
message or at the middle of the message.
If the tones recorded page are stripped in
the middle of the message all recorded
information preceding those tones will be
deleted, resetting the message start.
Strip any tones in
message and restart
recording message.
5 6
*Unlimited number of DTMF tones
4 tones
3 tones
DTMF Allotment
Most paging systems
require a limited number
of tones to be recorded
because of zone
controlling equipment. If
the selected number of
tones is exceeded the
BOMDMU will abort that
particular recording.
2 tones
7
*Enable
# # Abort
This would allow a caller to abort a page being recorded
by pressing the “#” button two times within one second.
The recording will immediately be aborted and the busy
back tone sent to the input. A single “#” sign during the
recording will not have any effect.
Disable
8
*Auto Play
Play Mode
Allows for automatic playback of page after recording.
Manual
9
*Disable
Pre-page Tone
A pre-recorded tone can be output prior to message
playback. This is used to alert listeners that a message is
about to be played. This tone will be output before each
message in the playback queue but not before the
repeated plays.
Enable
10
* Play once
Number of Plays
The number of times which each message plays
during the playback sequence. If multiple messages
were recorded into the queue, each message will
play this number of times.
Play twice
2.2.14 Configuration Switches
12 position DIP Switch: UP position is OFF, DOWN
position is ON. * indicates factory Default Setting.
Settings are scanned on power up. Power must be
cycled for changes to take effect.
1 2
*Off Hook (Loop Current) - The
system will record when the
system senses loop current.
Audio Sensor - The system will
start recording when the audio
sensor goes active and will
stop when the audio sensor is
inactive for 3 seconds.
DTMF - The system will start
recording when it detects a
valid DTMF tone and will stop
when the audio sensor is
inactive for 3 seconds.
Record Activation Method
The method with which the
user will enter the record
mode.
Not in use.
NOTE: Record Input activation is always available regardless of switch
settings. A maintained contact closure on any channel’s record input will
start the recording process on that channel for the duration of the closure.
3
*Active
Not Active
DTMF Tone Stripping
DTMF tones recorded at the beginning of an audio
message are typically used for zone control
purposes. A repeated page should not have the zone
control tones on the front end of the second page
because the zone controller is already routed,
therefore these tones will be stripped on the repeat of
a page. DTMF tones at the beginning of the page
would be handled in this fashion. Any DTMF tones
recorded in the middle of the message would be
recorded and played back in the typical manner.
12 9

2.2.10 Background Music Input Connector
RCA jack, Input audio level should be set to a nominal level of 0dBv, or
less. Tip is audio signal and sleeve is audio return.
Any audio input at this port will be fed through the system to the audio
output whenever the system is idle.
2.2.11 Audio Output Mode Switch
A two position slide switch allows the user to configure the audio output
to match the needs of their downstream equipment.
The RIGHT position sets the output to line level (+4 dB / 600-ohm). Use
this position as default.
The LEFT position sets the output to power level (500 mW / 8-ohm).
Use this for longer runs, or if not enough level can be reached with the
line level output.
2.2.12 Output Volume
Controls the audio output volume level delivered to the paging system. It
is shipped with 1:1 gain factory set.
Adjusting this input clockwise increases the level, and counter-clockwise
rotation decreases the level of the device
2.2.13 System Audio/Control Connector
Output, RJ12 style connector, 6 position. All audio from the BOMDMU
is output through this port
1. Not used.
2. Playing Relay, Normally Open.
3. Audio Return.
4. Audio Signal.
5. Playing Relay, Common.
6. Not used.
The playing relay contacts available on this connector are paralleled
with the connections on the Paging Control and Status Auxiliary
Interface, positions 9 and 10.
11 12
*1 second
3 seconds
5 seconds
Delay Between Plays
To make the page sequence more intelligible,
a pause can be inserted between each
message in the playback sequence as well as
between any repeats of each message.
10 seconds
2.2.15 Messaging Playback Auxiliary Interface
Top row of 12 inputs on the Auxiliary Interface. This interface allows
playback of pre-recorded messages through a momentary closure
(100ms). Each closure between a Play input and Ground will play the
corresponding message one time. Multiple closures on a single input or
several inputs will queue the messages and the system will play them in
the order received.
12 position Euro-style, two piece, pluggable type.
Pin Name Description
1 Ground Common
2 Play 1 Plays message 1 when connected to ground
3 Play 2 Plays message 2 when connected to ground
4 Play 3 Plays message 3 when connected to ground
5 Play 4 Plays message 4 when connected to ground
6 Play 5 Plays message 5 when connected to ground
7 Play 6 Plays message 6 when connected to ground
8 Play 7 Plays message 7 when connected to ground
9 Play 8 Plays message 8 when connected to ground
10 Play 9 Plays message 9 when connected to ground
11 Play 10 Plays message 10 when connected to ground
12 Not Used Not Used
2.2.16 Paging Control and Status Auxiliary Interface
Bottom row of 12 inputs on the Auxiliary Interface. Allows manual
access to many of the common inputs and status outputs of the system.
12 position Euro-style, two piece, pluggable type.
Pin Name Description
1 Ground Common
2 Not Used Not Used
3 Priority Initiates priority page when connected
to ground.
4 Stop Stops any currently playing message
when connected to ground.
5 Play Plays next message in queue when
connected to ground.
8 13

6 Not Used Not Used
7 Busy Common Common for the busy relay
8 Busy Relay Activates when system is recording or
playing a message.
9 Playing Common Common for the Playing Relay.
10 Playing Relay Activates when system is playing.
11 Recording Common Common for the Recording Relay.
12 Recording Relay Activates when the system is
recording.
3. PAGE STACKING, FEEDBACK ELIMINATION OPERATION
The BOMDMU offers 3 channels of page stacking, intended for busy paging
systems with multiple inputs. Each channel performs the following functions:
1. It eliminates feedback by recording the incoming page(s), then playing them
back after the user “hangs up”, eliminating any feedback loop.
2. It is able to repeat each page allowing for better intelligibility in a noisy
environment.
3. It is capable of stacking up to 16 incoming pages per channel by recording
incoming pages while playing back previously recorded ones on a first-in first-
out basis.
Constraints:
Each page is allowed a maximum of 1 minute recording time. Pages
exceeding this will be aborted and a busy back tone is generated.
Recordings that reach the end of memory are considered incomplete.
These pages are aborted and a busy back tone is generated. If the
memory is filled and a new recording command is offered, the
BOMDMU will not go into record mode and a busy back tone will be
output to tell the user that the system is not available.
The recorded message must be a minimum of one second in length.
Any message shorter than this will be aborted.
The BOMDMU aborts pages that are comprised of 3 or more seconds of
silence. The page is deleted and a busy back tone is generated.
Other important features include the ability to Record/Regenerate, or Block
DTMF tones for use in zone controller applications.
The BOMDMU is designed to run in both Automatic and Manual modes. For
paging applications the Automatic mode is the most widely used. This mode
requires minimum installation time since it is the factory’s default setup. RJ12
connectors are used for Audio inputs and outputs. Where logical, certain control
signals are also provided on the individual RJ12 connectors associated with each
input.
2.2.5 Priority Audio/Control Input
RJ12 style connector, 6 position. Priority pages are input to the device
through this connector.
1. Not used.
2. PRIORITY input, connect to Ground (Pin 5) to
activate. Priority active for duration of closure.
3. PRIORITY Audio, ring/return.
4. PRIORITY Audio, tip/signal.
5. Ground. (power return).
6. Not used.
2.2.6 Priority Mode Switch
Analog Station – LEFT Position. Impedance: 900-ohm, voltage for ring
trip 75 to 105V (20 to 60 Hz).
Dry Loop – CENTER Position. Configures audio input for 600-ohm,
line-level (-10 dB nominal).
Loop Start – RIGHT Position. Configures priority audio input for 900-
ohm and supplies 24V DC talk battery. Compatible with loop start trunk
ports.
2.2.7 Messaging Audio/Control Input
Input, RJ12 style connector, 6 position. Operation of the messaging
portion of the system is provided through this interface.
1. Not used.
2. Not used.
3. Audio, ring/return.
4. Audio, tip/signal.
5. Not used.
6. Not used.
2.2.8 Messaging Mode Switch
Analog Station – LEFT Position. Impedance: 900-ohm, voltage for ring
trip 75 to 105V (20 to 60 Hz).
Dry Loop – CENTER Position. Configures audio input for 600-ohm,
line-level (-10 dB nominal).
Loop Start – RIGHT Position. Configures priority audio input for 900-
ohm and supplies 24V DC talk battery. Compatible with loop start trunk
ports.
2.2.9 Background Music Input Volume
Controls the background music input volume level delivered to the audio
output. Adjusting this input clockwise increases the level, and counter-
clockwise rotation decreases the level of the background music.
14 7

2.2.1.3 Priority Onput
Priority Input Off-Hook LED - Yellow, indicates the priority channel is
being accessed via a phone circuit. (Loop current flowing)
Priority Input Active LED - Yellow, indicates the priority channel is
active.
2.2.1.4 Paging Input Channels (Channels 1,2,3)
Off-Hook LED - Yellow, indicates the priority channel is being accessed
via a phone circuit. (Loop current flowing)
Audio Sense LED - Yellow, indicates audio signal is present on that
particular Page port.
Record LED - Red, indicates that the particular Paging channel is
recording a message.
Play LED - Green, indicates that the particular Paging channel is
playing a message.
2.2.2 Power Input
Unit requires 12 VDC @ 1 Amp via the barrel connector. Only use the
factory supplied power pack. The chassis is connected to the negative
side of power supply.
2.2.3 Audio/Control Input, Paging Channels 1 - 3
RJ12 style connector, 6 position. All pages to be recorded are input to
the device through these connectors.
1. Abort, stops and deletes the recording when
connected to Ground (Pin 5).
2. Record input, connect to Ground(Pin 5) to
activate. Unit records for duration of closure.
3. Audio, ring/return.
4. Audio, tip/signal.
5. System Ground, (power return).
6. Not used.
2.2.4 Port Configuration Switch, Paging Channels 1 – 3, Priority
Input, Message Input
A three-position slide switch is provided for each of the five inputs from
the paging system: Channel 1, 2, 3, Priority, and Message. The switch
configures the particular port to meet the requirements of the paging
system.
Analog Station - LEFT Position. Impedance 900-ohm, voltage for ring
trip 75 to 105V (20 to 60Hz).
Dry Loop - Center Position. Configures audio input for 600-ohm, line
level (-10 dB nominal).
Loop Start - RIGHT Position. Configures priority audio input for 900-
ohm and supplies 24V DC talk battery. Compatible with loop start trunk
ports.
3.1 Page Recording
Upon receiving a valid recording signal, the BOMDMU will start recording at
the beginning of the memory until the page is complete. While this page is
playing, new pages can still be recorded. Multiple pages will be recorded in
series until the playing message has completed its play routine.
Multiple channels may be recording incoming pages at the same time.
Playback order of pages is based on when the recording process is
complete. For example, if a long message is being recorded on channel 1,
and during that process a short message is recorded and completed on
channel 2, the playback order will be the message on channel 2 then the
message on channel 1.
3.2 Record Activation Methods
There are several methods to initiate automatic record mode on the
BOMDMU. The activation mode will be selected by the Setup Switches upon
power up. It cannot be changed during normal operation.
Loop Current detect - Setup Switches 1=OFF, 2=OFF
If an input’s input configuration switch is set for loop start mode, the
BOMDMU will source the talk battery (24V DC) to the ring and tip, and then
sense the loop current when phone goes off hook and start the recording
process for the duration of the page. Valid for Analog Station and Loop Start
modes.
Audio Sense - Setup Switches 1=OFF, 2=ON
For record activation without a separate switch closure or loop current. The
BOMDMU will start recording when the audio sensor goes active and will
stop when the audio sensor is inactive for three seconds. Valid for Analog
Station, Loop Start and Dry Loop modes.
DTMF Activation - Setup Switches 1=ON, 2=OFF
For record activation without a separate switch closure and perhaps noisy
audio lines. The BOMDMU will start recording when it “sees” a valid DTMF
tone and will stop when the audio sensor is inactive for three seconds. Valid
for Analog Station and Loop Start modes. The DTMF tone used to activate
the recording will be stripped and not output when the message is played.
Manual Recording - Available in all modes. Typically associated with Dry
Loop mode, this enables the BOMDMU to begin recording with a switch
closure between pins 2 and 5 of the RJ12 connector of a particular channel.
3.3 Playback
The BOMDMU can be configured to automatically playback pages after their
record process has completed. This mode is configured by setting Setup
Switch 8 to OFF.
The BOMDMU may be configured for manual or switch closure playback
(Setup Switch 8=ON) when you want full control of when pages will
playback. Playback is triggered via a momentary closure (100ms) between
pins 1 and 5 of the Paging Control and Status Auxiliary Interface.
6 15

4. QUEUE
The BOMDMU incorporates a playback queue to manage the order that
messages play. This queue will manage up to 32 pages. Pages are put into the
queue on a first in, first out basis. The queue is compatible with pages from any
of the three page channels and/or the messaging input. The priority input offers
live, or direct, access to the output of the system. A priority page will pause the
playback queue. When the priority session completes, the queue will continue
from where it left off.
5. PRIORITY
The BOMDMU offers a Priority input to gain immediate access to the public
address system. Activation of priority halts the playback of recorded pages.
When the priority page is completed, the BOMDMU will resume playback from
the beginning of the message that was interrupted. Priority Activation methods
include Analog Station, Dry Loop and Loop Start. A valid connection via any of
these methods provides direct access to the system. Status of the Record
Activation switches is not relevant.
6. MESSAGING, PRE-RECORDED
The BOMDMU offers a pre-recorded messaging system for quick and easy
access to standard or frequently used pages. This system allows messages to be
recorded and permanently stored in FLASH memory. Playback is provided via
DTMF command or contact closure. The messaging portion of the BOMDMU can
store up to 99 messages in 8 minutes of memory.
DTMF Commands
Code Name Description
# End Use this function to stop recording or exit a
command
*0 Stop Stop playing all triggered messages
*3xx Delete Delete message at location xx
*5xx -or- xx Play Play message at location xx to the audio output
*6xx Review Listen to a message through the handset. Audio is
NOT routed to the audio output
*7xx Record Record message into location xx. Recordings may
only be made to empty message locations. To
update a previously recorded message, make sure
to delete it first.
Connect to the messaging system with the desired mode, analog station, dry
loop or loop start. The Message Off Hook LED indicates that you are connected
to the system in Loop Start or Analog Station mode.
A steady tone indicates a correctly executed and accepted command. A fast
busy signal indicates an incorrectly executed command.
BACK
The back panel of the BOMDMU provides all electrical connections to the
device. The connector type and signal descriptions are detailed later in this
manual.
Individual configuration of each audio input / output port is provided next to
each audio input connector.
Volume controls are provided for the BGM input and the audio output.
Flanges are provided on each side of the back panel of the BOMDMU to
provide strain relief to all the wiring routed to the BOMDMU.
2.2.1 Status LED Indicators
All Status Indicators are located on the front panel of the unit. The
different groups of LED indicators are described below:
2.2.1.1 System
The System indicators are global indicators that indicate that a particular
function is active on any, or all, of the inputs on the system.
System OK LED – Green, indicates unit is ON. Flashing indicates an
error condition, contact the factory for more information should this
occur.
Recording LED - Red, indicates that a recording session is active on
any one of the paging inputs.
Playing LED - Green, indicates that the audio output of the BOMDMU
is active due to a page playing back, or the priority input being active.
Busy LED - Yellow, indicates that any one of the paging inputs is
recording, playing, or in a delay mode. This LED is also active when
a priority announcement is being made.
2.2.1.2 Message Input
Messaging Input Off Hook LED - Yellow, indicates the messaging
system is being accessed via a phone circuit. (Loop current flowing)
Messaging Input Level LED - Yellow, indicates audio signal is present
on the Message Input.
16 5

2. INSTALLATION & CONFIGURATION
This section provides complete instructions for mounting the BOMDMU in a rack
or on a table. It also illustrates all interface requirements to auxiliary equipment,
including inputs and outputs. Configuration switch settings are provided.
2.1 Installation Steps
These are the general steps for installation:
1. Find a space in a rack or on a table. Mount the unit to the selected place
with its wiring at least 18” away from the power supply or other equipment
that generates electrical noise. Secure unit using the supplied mounting
screws.
2. Make sure there is a standard electrical outlet into which you can plug the
power pack. This outlet should NOT be controlled by a wall switch.
3. Make cable connections from the BOMDMU to the PBX or audio source
and the Paging system,
4. Set DIP switches to the desired operation.
5. Connect the power supply. System OK LED should illuminate GREEN.
6. Test unit operation.
2.2 Hardware Description
FRONT
The BOMDMU is a standard 1RU 19” rack mount chassis.
The front panel of the BOMDMU provides user indications of the system
status via LEDs. The description of each LED can be found in section 2.2.1
of this manual.
Configuration switches are also accessible on the front panel of the unit.
The description of the various user configurable settings can be found in
section 2.2.14 of this manual.
7. BACKGROUND MUSIC INPUT
The BOMDMU allows for a background music source to be mixed with pages
and pre-recorded messages. Background music is muted when pages or pre-
recorded messages are played to the audio output. The BGM Level control
allows you to optimize the level music sent to the audio output.
8. AUDIO OUTPUT
The audio output of the BOMDMU is the audio interface for your zone controller,
amplifier or public address system. All audio from the paging channels, priority
input, messaging system and BGM input is routed to this output. The BOMDMU
manages stored pages on a first in, first out basis. This means that pages will be
played in the order they were successfully completed and or triggered,
independent of the particular input. Only the priority input has the ability to
interrupt the playback queue. In the case of a priority page, the system will pause
the playback queue during the priority page, then continue when the page is
complete.
4 17

Appendix
BOMDMU Connection to Override to PCMTIM
BOMDMU Connection to Override to UTI1
1.2 General Specifications
AUDIO
Bandwidth 100 Hz to 8 kHz
Page Input 3, RJ12 connector, Station Port/Dry Loop/Loop Start
Priority Input 1, RJ12 connector, Station Port/Dry Loop/Loop Start
Messaging Input 1, RJ12 connector, Station Port/Dry Loop/Loop Start
Background Music
Input
Line level input with level control
Page output 1, RJ12 connector, 8-ohm power/600-ohm line level
(switch-selectable), adjustable
PAGE STACKING
Message repeat play one or two times, DIP switch selectable
Delay between
messages
1s, 3s, 5s, 10s DIP selectable
Stack up to 16 messages per input
DTMF Store/forward (0,2,3 or 4 tones) DIP selectable
Pre-Page Tone DIP selectable
POWER
Power Pack 12V DC @ 1 Amp, UL and CSA
MEMORY
Type FLASH
Page Stacking 4 minutes per page input channel
Messaging 8 minutes
MESSAGE CONTROL
# of messages 99
Record Control DTMF control from messaging input
Play Control Triggered from DTMF on messaging input or start
contacts (10)
PAGE CONTROL
Priority Control contact is offered on the Priority Input RJ12
connector
Page Inputs 3, Page Input RJ12 connector. Each input answers
(loop, audio sense, DTMF)
STATUS OUTPUTS Solid State Relay contacts 24V DC @ 100 mA max.
Playing Contact Offered on the Page Output RJ12 connector
Record Contact Offered on each Page Input RJ12, as well as the
Message Input RJ12
PACKAGE
Chassis: Rack mount (1 RU)
Material: 18 gauge cold rolled steel, painted with silkscreen
18 3

1. OVERVIEW
1.1 Features and Capabilities
The BOMDMU is a comprehensive system that combines Page Stacking,
Feedback Elimination, Pre-Recorded Messaging and Background Music
control into a single device.
PAGE STACKING/FEEDBACK ELIMINATION: For busy overhead paging
systems, the BOMDMU offers 3 channels of page stacking and feedback
elimination. Each channel can record and temporarily store up to 16 pages
or 4 minutes of audio. Page input channels can record simultaneously, and
while the system is playing.
PRIORITY PAGING: For emergencies, the BOMDMU offers a priority input
that overrides the stacking and messaging functions and provides
immediate, real-time access to the paging system.
PRE-RECORDED MESSAGES: For security and general public address
messaging, a pre-recorded messaging sub-system has been included.
Access both Record and Play functions of up to 99 messages/8 minutes of
audio from an extension on your host telephone system. Ten (10) start
contacts have also been provided to trigger messages from external devices
such as sensors or alarm systems.
BACKGROUND MUSIC: To keep everything in harmony, the BOMDMU also
includes a background music input. This allows playback of your favorite
music source over the paging system. When a page or message is played,
the background music will be muted and the announcement will be heard
loud and clear.
BOMDMU Connection to Override to UTI312
2