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DFT120

Digital Feedback Terminator

Installation and Use Manual

Specifications subject to change without notice.

54-5036-02D 1205

Notice: Every effort was made to ensure that the information in

this guide was complete and accurate at the time of printing.

However, information is subject to change.

FCC Statement (Part 15) - Radio Frequency

Interference

The Digital Feedback Terminator generates and uses radio fre-

quency energy and if not installed and used in strict accordance

with the manufacturer's instructions, may cause interference to

radio and television reception.Testing is being conducted for

compliance with the limits for a Class B device in accordance

with the specifications in Part 15 of the FCC Rules.This testing

is designed to provide reasonable protection against such inter-

ference. 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 Digital Feedback Terminator unit

off and on, the user is encouraged to try to correct the interfer-

ence by one or more of the following measures:

- Reorient the radio or TV receiving antenna.

- Relocate the Digital Feedback Terminator unit with respect

to the radio or TV receiver or vice versa.

- Plug the Digital Feedback Terminator 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 experi-

enced radio/television technician for additional suggestions.

The user may find the following booklet, "How To Identify and

Resolve Radio-TV Interference Problems," helpful.This booklet

was prepared by the Federal Communications Commission

(FCC) and is available from the U.S. Government Printing

Office,Washington, DC 20402. Stock order No. 004-000-

00345-4.

Important Safety Information

Always follow these basic safety precautions when installing

and using the system:

1. Read and understand all instructions.

2. Follow all warnings and instructions marked on the product.

3. DO NOT block or cover the ventilation slots and openings.

They prevent the product from overheating. DO NOT place

the product in a separate enclosure or cabinet, unless

proper ventilation is provided.

4. Never spill liquid on the product or drop objects into the

ventilation slots and openings. Doing so may result in seri-

ous damage to the components.

5. Repair or service must be performed by a factory authorized

repair facility.

6. The product is provided with a UL-CSA approved, 3-wire

ground type plug.This is a safety feature. DO NOT defeat

the safety purpose of the grounding type plug. DO NOT

staple or otherwise attach the AC power supply cord to

building surfaces.

7. DO NOT use the product near water or in a wet or damp

place (such as a wet basement).

8. DO NOT use extension cords. The product must be

installed within 6 feet of a grounded outlet receptacle.

9. DO NOT install telephone wiring during a lightning storm.

10. DO NOT install telephone jacks in a wet location unless the

jack is specifically designed for wet locations.

11. Never touch uninsulated wires or terminals, unless the line

has been disconnected at the paging or controller interface.

12. Use caution when installing or modifying paging or control

lines.

Contents

Overview ..........................................................................................................................................................................4

Features and Capabilities ..................................................................................................................................4

Specifications ....................................................................................................................................................4

Physical ......................................................................................................................................................4

Electrical......................................................................................................................................................4

Environmental ............................................................................................................................................4

Interconnect ................................................................................................................................................4

Panel Descriptions..........................................................................................................................................................5

Installation ......................................................................................................................................................................6

Package Contents ..............................................................................................................................................6

Installation Steps ................................................................................................................................................6

Mounting the Unit ..............................................................................................................................................6

Operation ....................................................................................................................................................................7-8

Page Operation ..................................................................................................................................................7

Recording a Page ......................................................................................................................................7

Playing Back a Page ..................................................................................................................................8

Override Operation ............................................................................................................................................8

Connections and Switches ......................................................................................................................................9-14

Power ..........................................................................................................................................................9

Override Input..............................................................................................................................................9

Override Control Switch ..............................................................................................................................9

Page In Input ..............................................................................................................................................9

Page In Control Switch................................................................................................................................9

Audio Out Volume Control ........................................................................................................................10

Audio Out Impedance Selector ................................................................................................................10

Audio Out ..................................................................................................................................................10

General Purpose I/O Connector................................................................................................................10

Setting Setup Switches ....................................................................................................................................10

Record Activation ......................................................................................................................................10

DTMF Stripping ........................................................................................................................................11

DTMF Control ............................................................................................................................................11

DTMF Allotment ........................................................................................................................................11

Message Abort ..........................................................................................................................................11

Play Mode..................................................................................................................................................11

Pre-Page Tone ..........................................................................................................................................11

Number of Plays........................................................................................................................................12

Play Delay ................................................................................................................................................12

External I/O Connections and Control..............................................................................................................13

Abort Control Input ....................................................................................................................................13

Override Control Input ..............................................................................................................................13

Stop Control Input ....................................................................................................................................13

Play Control Input......................................................................................................................................13

Page In Control Input ................................................................................................................................13

Terminal Block, Output Signals ........................................................................................................................14

Busy Contact ............................................................................................................................................14

Play Contact..............................................................................................................................................14

Rec Contact ..............................................................................................................................................14

Example: System Setup and Connecting to the Paging Systems ..................................................................15

Limited Warranty; Exclusion of Certain Damages ....................................................................................................16