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Product Specifications

DSX-1 INTERFACE

Interface Type: 4-wire (Tx pair and Rx pair)

Operating Mode: Full Duplex

Maximum Data Rate: 768 kbps (12 channels
x 64 kbps)

Line Equalization: 0-655 feet

Line Code: AMI, B8ZS

Framing: D4 ESF

Line Impedance: 100

CHANNEL BANK FACILITY INTERFACE

Fully compatible with D4 channel bank 
equipment 

CLOCK SOURCES

Derived from channel bank

DIAGNOSTICS

Self Test

Near Loopback

Far Loopback

ENVIRONMENT

Operating (standard): –40° to +70°C

Storage: –40° to +85°C

Relative Humidity: Up to 95% 
non-condensing

PHYSICAL CHARACTERISTICS

Dimensions: 4.4" H, 1.4" W, 10" D

Weight: 8 ounces, nominal

Plugs into AT&T D4, SLC-96, or ADTRAN
ACT 1241 customer premises bank

Power: 5 Volts: 100µ max

–48 Volts: 40 mA max

Total Power: 2.0 W max

FACEPLATE INDICATORS

The FT1-TDM has four faceplate LEDs
which indicate operational status

FACEPLATE SWITCHES 

Two DIP switches are located on the
FT1-TDM faceplate. Use these to activate
and deactivate far end loopback and near
end loopback. Use the twelve-position
rotary switch to select the number of
channels to be used.

Ordering Information

EQUIPMENT

PART #

FT1-TDM ...............................................1242052L1

Specifications subject to change without notice.

CORPORATE OFFICE

901 Explorer Boulevard

Huntsville, AL 35806

800 9ADTRAN

Local: 256 963-8000

Fax: 256 963-8699

Fax Back: 256 963-8200

http://www.adtran.com

email: [email protected]

TELCO TECHNICAL

SUPPORT

800 726-8663

REGIONAL OFFICES

Irvine, CA 

800 788-5408

Denver, CO 

800 471-8651

Atlanta, GA

800 332-6945

Kansas City, KS

800 471-8649

Philadelphia, PA

800 471-8656

Dallas, TX

800 471-8648

Canada

800 232-6811

ADTRAN is an ISO 9001 

registered company.

Printed in U.S.A. on recycled paper

61242.052L1-8A May 1998

©ADTRAN, Inc. 1998

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