AT&T DMOH User manual

Digital Magic On Hold SM Tape Deck
Model DMOH
Installation and
Operation Instructions
Magic On Hold is a Service Mark of AT&T
Issue 1, 12/2/91
Printed In U.S.A.

Limited Warranty and Limitation of Liability
AT&T warrants to you that the product will be free from defects In material
and workmanship when title passes to you. If you notify AT&T that the
product has failed to operate as warranted within one year of the date title
passes to you, AT&T will, at its option, repair or replace the component or
components of the product that failed to operate as warranted. Any repair or
replacement components may be new or refurbished and will be provided on
an exchange basis. If AT&T determines that the product cannot be repaired
or replaced, AT&T will refund the purchase price to you.
If you purchase the product directly from AT&T, AT&T will perform warranty
repair on your premises in accordance with the terms and conditions of
AT&T's "Business Day" or "Around-the-Clock" warranty plans. The details of
AT&T's warranty plans may be obtained from AT&T. If you purchased the
product from an authorized dealer, you will be covered by AT&T's
authorized dealer plan during the warranty period. Contact your authorized
dealer for details of AT&T's authorized dealer warranty plan. AT&T's
obligation to repair, replace or refund as set forth above is your exclusive
remedy.
The limited warranties provided above do not cover damages, defects,
malfunctions or product failures caused by:
·Failure to follow AT&T's installation, operation or maintenance
instructions;
·Unauthorized modification or alteration of the product or its
components;
·Product abuse, misuse or the negligent acts of persons not under the
·reasonable control of AT&T;
·Actions of third parties and acts of God other than power surges (e.g.,
lightning).
This limited warranty applies only to the product purchased directly from
AT&T or purchased directly from an authorized AT&T dealer. This limited
warranty does not apply to products purchased or operated outside the
United States.
You may be required to provide AT&T with proof of purchase before AT&T
will perform any warranty replacements.
EXCEPT AS SPECIFICALLY SET FORTH ABOVE, AT&T, ITS AFFILIATES,
SUPPLIERS AND DEALERS MAKE NO WARRANTIES, EXPRESS OR IMPLIED, AND
SPECIFICALLY DISCLAIM ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE.
EXCEPT FOR PERSONAL INJURY, THE LIABILITY OF AT&T, ITS AFFILIATES,
SUPPLIERS AND DEALERS FOR ANY CLAIM, LOSS, DAMAGE OR EXPENSE FROM
ANY CAUSE WHATSOEVER, REGARDLESS OF THE FORM OF THE ACTION,
WHETHER IN CONTRACT, TORT OR OTHERWISE, SHALL NOT EXCEED THE
LESSER OF DIRECT DAMAGES PROVEN OR THE REPAIR OR REPLACEMENT
COST OF THE SYSTEM OR THE SYSTEM'S PURCHASE PRICE. IN NO EVENT

SHALL AT&T, ITS AFFILIATES, SUPPLIERS AND DEALERS BE LIABLE FOR
INCIDENTAL, RELIANCE, CONSEQUENTIAL OR ANY OTHER INDIRECT LOSS OR
DAMAGE (INCLUDING LOST PROFITS OR REVENUES SUSTAINED OR INCURRED
IN CONNECTION WITH THE SYSTEM). THIS LIMITATION OF LIABILITY SHALL
SURVIVE FAILURE OF THE EXCLUSIVE REMEDY SET FORTH IN THE LIMITED
WARRANTY ABOVE.

Digital Magic On Hold (SM) Tape Deck
Model DMOH
Installation and
Operation Instructions
To Order Copies of This Manual
Call: Your AT&T Information Systems Sales Representative
or
Your Business Sales and Service Center
1-800-247-7000
or
The AT&T Customer Information Center
1-800-432-6600
Write: AT&T Customer Information Center
P.O. Box 19901
Indianapolis, IN 46219
Order: Digital Magic On Hold Tape Deck
Model DMOH
Installation and Operation Instructions
Issue # 1
For Technical Assistance
AT&T provides a toll-free customer helpline 24-hours a day. In the USA, call
the AT&T Helpline at 1-800-628-2888 for assistance. In Canada, call one of
the following Technical Assistance Centers for service or technical assistance:
Eastern Canada and Ottawa: 1-800-363-1882
Ontario: 1-800-387-4268
Central and Western Canada: 1-800-663-9817

FCC Notice
This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of FCC rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause
harmful interference to radio or television reception, which can be determined by
turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver
—Connect the equipment into an outlet on a circuit different from that to which
the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
Specifications
Sampling Method: Adaptive Delta Modulation (ADM)
Sampling Frequency (Switch
Selected): 32/45 Kilobits/sec.
Message Length (Switch Selected): 3 or 4 minutes
Power Required: 12V AC/DC. Power supply included with
the unit provides 12VAC @ 800mA from
11OVAC source
External Speaker Power: 1 Watt into 8 ohms
Input: High-quality Magic On Hold cassette-
tape. Fully automatic operation
Output: LINE 600-ohms/transformer-balanced via
RCA phono jack; 1Watt into 8-ohms via
RCA jack (can be used to power an
external speaker)
Controls: POWER on/off switch; SPEAKER on/off
switch; VOLUME control (for monitor
speaker, 1WATT and LINE output jacks);
TRlG(ger) jack for single play operation
Indicators: LEDs for POWER, PLAY and RECORD
Mounting: Desk-top or wall-mounting, template and
hardware included
Dimensions: 7-7/8" x 6-3/8" x 3-1/4"
Shipping Weight: 3 lbs.
Cassette Tape: Magic On Hold - AT&T Customized
Programming Service

Table of Contents
Introduction ...............................................................................1
Front Panel Features ....................................................................2
Rear Panel Controls and Connectors ...........................................3
Installation & Operation ..........................................................4
DMOH Package Contents..............................................................4
Unpacking and Inspection............................................................4
Installation Precautions................................................................4
Installation Procedure...................................................................4
Select Memory Capacity ......................................................4
Connecting a Power Supply .................................................5
Connecting to the Telephone System .................................5
Connecting an External Speaker..........................................5
Loading Cassette Tape.........................................................5
Optional External Trigger Operation ...................................7
Troubleshooting .........................................................................8
Care and Maintenance...............................................................8
Wiring Connection......................................................................9

AT&T DMOH
Introduction
The AT&T Digital Magic On Hold (DMOH) Tape Deck plays a digitally recorded Magic
On Hold announcement over the message-on-hold bus of most telephone systems.
To obtain Magic On Hold customized cassette programs call your AT&T account
executive or 1-800-247-7000.
To operate, place a cassette tape in the tape compartment. The unit automatically
plays (previews) a portion of the audio program over its monitor speaker, and then
pauses so that you can change tapes if desired. If you leave the cassette in the
compartment, the message is recorded (downloaded) into digital memory. The
digitally-stored message then plays continuously (it can be set for single-play
operation). Solid-state operation results in less wear of the tape and tape drive
mechanism, increasing reliability and performance.
The DMOH unit has two sampling rates, which determines the maximum recording
times (shorter record time provides the highest quality playback sound). The unit
can record 3 minutes or 4 minutes, 20 seconds total. The unit features:
·Automatic downloading, with preview function, from a Magic On Hold cassette
tape
·Automatic reload after power outage
·High reliability with no tape wear or maintenance problems
·Choice of 600-ohm "Line" output or 1 Watt (8-ohm) output
·Built-in monitor speaker with on/off switch
·Volume control (for monitor speaker,600-ohm/1 -Watt outputs).
·One time play capability (triggered by external contact closure)
To change a message, simply insert a new cassette. The new message is previewed
and then automatically downloaded. Once a message has been loaded, the cassette
rewinds and remains in the tape compartment. Then, if the power goes out, or if you
turn your system off, the message is automatically reloaded once power is restored.
The unit provides 600-ohm and 1-watt output jacks for connection to the music-
on-hold (MOH) bus of a telephone system, external speaker, or public address
system. The unit mounts easily on a wall or shelf and comes complete with wall-
mounting hardware, an audio patch cord, stereo mini plug, and 12 VAC power
supply which can be plugged into any convenient 110V AC outlet.

AT&T DMOH
Front Panel Features
Cassette Tape Compartment
High-quality cassette tape drive mechanism accepts a Magic On Hold cassette tape.
Cassette tape direction indicator is shown on the compartment door.
LED Indicators
For POWER, PLAY, & RECORD. PLAY illuminates only while the digitally stored
message is playing. It goes out when recording (downloading) and between
playbacks during single-play operation.
Monitor Speaker
Lets you monitor the tape during the preview and downloading process, and when
the unit is operating. An on/off switch is included on the rear panel (SPEAKER).

AT&T DMOH
Rear Panel Controls and Connectors
APOWER Turns power on. The memory is erased when the switch is off.
B12V AC/DC Jack accepts 12V AC or DC power to the unit. The power supply
provides 12V AC @ 800mA from a 110V AC source.
CLINE 600 600-ohm output to the MOH input on a telephone system or to a
loudspeaker system.
DSPEAKER Turns monitor speaker on or off.
E1 WATT RCA jack provides 1 Watt @ 8 ohms.
FVOLUME Controls output level of the monitor speaker and the 1WATT and LINE
600 jacks.
GTRIG External trigger jack for single-play operation. Accepts a mono or
stereo
mini-plug (you can monitor system operation when a stereo mini-
plug is used).

AT&T DMOH
Installation & Operation
DMOH Package Contents
·Digital Magic On Hold unit (Comcode: 406659342)
·Power Supply
·Cassette Tape, Generic (Comcode: 406659359)
·Audio Patch Cord
·Stereo Mini-Plug
·Wall Anchors
·Installation & Operation Instructions
·Mounting Template
·Customer Card
Unpacking and Inspection
The DMOH unit was carefully checked at the factory. Inspect the carton and unit for
signs of damage. If damage is found, notify the location from whom the unit was
purchased. If the unit was shipped to you directly, notify the transportation company
without delay if it is damaged or fails to operate correctly. Save the carton and all
packing material as evidence of damage for their inspection.
Installation Precautions
Observe the following installation precautions:
·Do not install the unit in damp areas, or in areas where it is likely to be exposed
to rain or moisture.
·Do not install the unit in areas where the ambient temperature is likely to go
below 40ø F or exceed 90ø F.
·Do not place the unit on other equipment which produces high heat,
uncomfortable to the touch.
·Use suitable fasteners on hollow walls or other similar thin materials. Plastic
screw anchors are included.
Installation Procedure
Select Memory Capacity
A MODE switch on the underside of the unit sets the maximum memory capacity. Set
to 3/6 position for highest sound quality. Set to 4/8 position for extended memory
capacity of 4 minutes, 20 seconds. The unit only acknowledges changes in memory
capacity on power-up or cassette changes.

AT&T DMOH
Connecting a Power Supply
Connect the output plug from the power supply to the 12V AC/DC jack on the rear
panel of the unit. Plug the power supply into any convenient 110V AC outlet.
Connecting to the Telephone System
Use the audio patch cord terminated with an RCA plug (included) to connect the LINE
600 ohm or 1 WATT output to the telephone system's music-on-hold (MOH) input.
Refer to page 9 for wiring connections. All MOH connections should be per the
specific telephone system (Merlin, Partner, etc.) requirements.
Connecting an External Speaker
The 1 WATT output RCA jack can be used to power an external speaker. The output
provides 1 watt into 8 ohms. The LINE 600 or 1 WATT outputs can also be used to
feed the input of a loudspeaker system's amplifier.
Loading Cassette Tape
Use the following procedure to load a Magic On Hold cassette tape.
·Set the sampling rate/memory capacity using the MODE switch on the underside
of the unit.
·Place the POWER switch in the ON position. The red POWER indicator will
illuminate.
·Be sure the SPEAKER switch is in the on position (if desired), and set the VOLUME
control between its minimum and maximum positions
·Open the tape compartment door and insert the cassette tape. The tape direction
is indicated on the compartment door. Close the tape compartment door.
The unit rewinds the cassette tape (if necessary) and then begins to play. It plays
(preview) approximately 5 seconds of the audio message and then stops (the
RECORD and PLAY indicators do not illuminate during the preview). The tape heads
then retract for approximately 5 seconds following the preview, allowing you to
remove the cassette, if desired. If you do not remove the cassette, it rewinds and the
message downloads into digital memory (the RECORD indicator illuminates when
downloading starts). Adjust the volume for comfortable listening level during
downloading and play.

AT&T DMOH
Important Notes:
1. The downloading process starts when audio signal is sensed, ensuring that
memory capacity will not be consumed during tape leader travel or for a delay of
the audio recording.
2. The audio RCA outputs do not operate during the downloading process.
Recording stops (and the RECORD indicator will go out) when 4 seconds of silence
has elapsed following the recording, or when memory capacity is exceeded, or when
the cassette tape reaches the end of its travel. After the message has been
downloaded, the cassette automatically rewinds, and should be stored in the tape
compartment for reloading after power outages.
Following the downloading process, the message will play continuously (the PLAY
LED will illuminate). To properly adjust the volume level for telephone message
output, the following steps should be followed:
·Slide speaker monitor switch to off position.
·Connect the unit to the telephone system through the LINE 600 ohm output or 1
WATT output, refer to page 9 for system wiring connections. If telephone system
has MOH volume control, set it to approximately 1/2 output level.
·Place a call to your telephone from another telephone.
·Place the calling telephone on hold.
·Adjust DMOH volume control to obtain a comfortable listening level. If level is
not acceptable, adjust telephone system MOH volume.

AT&T DMOH
Optional External Trigger Operation
External Trigger Operation is not required for most AT&T MOH
Applications
The unit can be set for single-play operation, activated by an external trigger. (Note:
the PLAY LED on the front panel illuminates only during digital playback.)
The TRIG mini-jack on the rear panel accepts a mono or stereo mini-plug, as shown
in the illustration below. When the plug is inserted, the unit automatically switches
to the single-play mode. (If the trigger is inserted during the playback, the message
will play through to the end and then stop.)
The external trigger offers two modes of operation: If the contacts are closed and
then opened within 5 five seconds, the message will play completely and then stop
(any further contact closure action at the trigger is ignored until the playback is
complete). If the contacts are closed for more than five seconds, playback will stop
when the contacts are opened and the unit will return to its idle state.
If a stereo mini-plug is used, the middle ring and barrel provides 0V DC or 5V DC
level which can be used to indicate unit status: The 0V DC level indicates digital
playback operation; 5V DC indicates the unit has stopped playing the message.
(Note: the signal is for monitoring purposes only and can not be used to directly
operate external equipment.)

AT&T DMOH
Troubleshooting
Power LED does not light - Check power supply connection. Turn Power switch On.
Tape plays too fast - Remove cassette and tighten up any slack in the cassette.
Output too low or sounds distorted over telephone - Readjust volume or change
type of output used. Some telephone systems also have a volume control for the
MOH system; this may also require adjustment.
Cannot remove cassette because head is engaged - Turn power off and then on.
Wait for head to retract then remove cassette.
Unit does not preview or download cassette - The DMOH is not compatible with
CrO2 tapes. You must use a proper AT&T Magic On Hold cassette.
Tape does not load properly or drive mechanism continues to spin with the tape in
place - can be caused if an endless-loop tape is inserted into the unit. Do not use
endless-loop tapes.
Unit fails to download or message is very saturated - Check the temperature at the
unit's location. If it is below freezing, let the unit settle at room temperature and try
again.
Care and Maintenance
The impact-resistant housing and quality construction of the DMOH virtually
eliminates the need for service or maintenance.
If the tape drive mechanism receives extensive wear, the tape head, capstan, and
pinch roller can be cleaned with isopropyl alcohol using a cotton-tipped applicator.

AT&T DMOH
Wiring Connection
Digital Magic On Hold Tape Deck
TELEPHONE
SYSTEM MUSIC ON HOLD CONNECTION (See Note) OUTPUT
MERLIN(R)206,410,82
0PAGING CARTRIDGE #6102-MHPA 1 WATT
MERLIN 1030/3070 SERVICES MODULE #61320A 1 WATT
MERLIN II
MERLIN LEGEND MUSIC COUPLER #61398A-THROUGH LOOP START TRUNK PORT 600 OHM
MERLIN PLUS BUILT INTO CONTROL UNIT (MOH JACK) 1 WATT
PARTNER(R) II
PARTNER PLUS
SPIRIT(R)
BUILT INTO CONTROL UNIT (MOH JACK) 600 OHM
System 25 TIP/RING CIRCUIT PACK ZTN-78
(#62504A) or ANALOG LINE CIRCUIT
PACK TN742 (#63111A) KIT-OF-PARTS
D-181575 (#62513)
1 WATT
System75/ DEFINITY
Generic AUX.TRUNK CIRCUIT PACK TN763B(#63118A) 36A COUPLER
(#65235)
600 OHM

MERLIN, PARTNER, & SPIRIT are Registered Trademarks of AT&T
MAGIC ON HOLD is a Service Mark of AT&T
Note: Connect the Magic On Hold unit to the telephone system per the telephone system installation instructions for
Music-On-Hold.