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Summary of Contents for Bogen DFT120
- Page 1 Digital Feedback Terminator DFT120 Model Installation and Use Manual © 2003 Bogen Communications, Inc. All rights reserved. Specifications subject to change without notice. 54-5036-02C 0310 Printed in U.S.A.
- Page 2 If this equipment does cause interference to radio or television reception, which can be deter- mined by turning the Digital Feedback Terminator 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.
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Page 3: Table Of Contents
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... -
Page 4: Overview
A single page can have a maximum length of 1 minute. The unit can record new pages while playing back previously recorded pages. The DFT120 eliminates feedback over the paging system by opening the loop between the input microphone and the speakers.This not only eliminates the potential for acoustic feedback, but also gives the user flexibility in the manner in which pages are broadcast. -
Page 5: Panel Descriptions
Panel Descriptions Bottom Panel 1. Power - Input jack for power connection. 2. Override Input - RJ11 jack for both loop start and dry audio input sources. 3. Override Control Switch - Selects either dry loop (DL) or loop start (LS). 4. -
Page 6: Installation
1. Select a space on the wall, rack or table. Make sure there is a standard electrical outlet into which you can plug your power pack.This outlet should not be controlled by a switch. Mount the DFT120 and its wiring at least 18 inches away from power supply or other equipment that generate electrical noise. Secure using the supplied mounting screws. -
Page 7: Operation
In this configuration when audio is detected the unit begins recording the page into memory.After a 3 second interval of silence, the DFT120 stores the page and begins playback of the page as soon as it is possible. -
Page 8: Playing Back A Page
Once played, the messages are erased from memory.When the DFT120 has 16 messages stored or if all available memory has been used, it will issue a busy back tone whenever it is accessed until additional message space is made available by playing the stored pages. -
Page 9: Connections And Switches
Not used Override Control Switch LOOP START Right Position - For operation with a Loop Start trunk.The DFT120 supplies the talk battery for loop current to start recording. DRY AUDIO Left Position - Operates with phone system's Page/AUX Port, a dry audio inter- face and a contact closure is required for supervision. -
Page 10: Audio Out Volume Control
Normally Open contact 12. RECORD Setting Setup Switches The DFT120 is designed to have several functions programmed by the user. These adjustments will be made via DIP switch settings in the field. These programmable set- tings are listed and described below. -
Page 11: Dtmf Stripping
DFT120 will abort that particular recording. The number of tones which the DFT120 can be pro- grammed to cut off after is two, three, four, or unlimited. -
Page 12: Number Of Plays
Number of Plays The number of times which each message plays during the playback sequence can be selected from one or two times. If multiple messages were recorded into the queue, each message will play this number of times before the next mes- sage is played. -
Page 13: External I/O Connections And Control
Note: Once the DFT120 senses 8 seconds of silence, it will send the busy back tone to the user and abort the recording.The DFT120 will not be able to record new pages as long as the Page In input is held active.The user will be informed by the busy... -
Page 14: Terminal Block, Output Signals
Play output will be shorted when the Override Input is active. Rec Contact Normally Open contact closure becomes shorted whenever the DFT120 is actually recording a page into memory. It will not be activated just because the Record input is active, but only when the DFT120 is actually storing data. -
Page 15: Example System Setup And Connecting To The Paging Systems
Example: System Setup and Connecting to the Paging System The DFT120 can be configured in several ways depending on the paging system used.The DFT120 is typically installed between the telephone system and the paging system. It interfaces with the paging controller in a zone pag- ing environment, and with the amplifier in a single-zone installation. - Page 16 50 Spring Street, Ramsey, NJ 07446, U.S.A. Tel. 201-934-8500, Fax: 201-934-9832, www.bogen.com...
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