DataComm D14.4, D33.6, D56 User Manual

D-Series

Dial-Up Modem

TABLE OF CONTENTS

SECTION 1 - DESCRIPTION....................................................................... 2

SECTION 2 - SPECIFICATIONS.................................................................4

SECTION 3 - INSTALLATION.....................................................................5

SECTION 4 - FRONT PANEL INDICATORS ............................................ 9

SECTION 5 - INTERFACE SIGNALS....................................................... 10

SECTION 6 - TROUBLESHOOTING .......................................................11

SECTION 7 - WARRANTY.......................................................................... 12

Data Comm for Business, Inc.
807 Pioneer Street
Champaign, IL 61820 Revision Date: November 4, 1999
217-352-3207

8500073

1. DESCRIPTION

1.0 Description
The DCB Dial-Up modem is available in 14.4, 33.6, or 56 Kbps (V.90)

versions. The case, connectors, power supply and lights are the same
for all three versions. The modem can be powered by an external AC
wall mount power supply, or by an optional internal 24, or 48 volt
DC supply. A rack front is available for the metal case, so it can be
easily rack mounted with one, two or three modems per 1U rack
height.

Applications for the D-Series modems include those industrial
strength applications where a rack mounting is required, a metal
enclosure is required, or where the power source available is DC,
rather than an AC wall outlet.

The slower models are quite useful for remote control applications.
Since the D series is available in a 14.4 Kbps model, it is faster
connecting than more complex modems which have to step down to
the slower speed only after failing negotiation at faster speeds. They
are also more reliable on marginal phone lines than commonly used
“retail store” modems.

1.1 Features

• Metal enclosure

• Stand alone or rack mounting

• Two-wire dial-up modem

• 14.4 Kbps, 33.6 Kbps or 56 K (V.90) modem

• DB-25 serial asynchronous interface

• LED’s for Power, TxD, RxD, DTR, DCD

• Ideal for remote data collection applications, SCADA, back-up

links, and remote controls.

• 120 VAC wall mount supply included

• Available with options for external 24 or 48 VDC power

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D33.6 Front and Rear Views

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2. SPECIFICATIONS

2.1 Specifications

2.1.1 General

Three model options, (14.4, 33.6 or 56 Kbps)

14.4 model – D14.4

33.6 model – D33.6
56K model – D56
For special power options, add the suffix -24 or -48 for 24 or 48

volt DC power

2.1.2 Front Panel Indicators

Power, TxD, RxD, DTR, DCD

2.1.3 Controls

Standard AT command set

2.1.4 Physical/Electrical

Power requirements: 12 VDC, 500 ma
Supports 9 to 18 VDC external power on 2.5mm x 5.5 mm power

connector
Options available for 24 or 48 VDC external power
Rack mount bezel available for 1, 2 or 3 units per 1U rack height
Size: 5.75" x 1.45" x .5.5"
Weight: one pound

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