DSC MD12 Installation Instructions

Introduction

The DSC modem is a communication device designed to enable computer terminals, through use of an RS232 port to
communicate via telephone lines with the DSC line of downloadable security systems.
Although the DSC modem uses the Hayes command set as a template, not all Hayes commands are supported. As a result,
some communication packages that are Hayes compatible may not work.
The modem is compatible with Bell 103-300 and 110 baud data communication standards, using standard Hayes commands.
LEDs
The LED indicators on the top of the modem indicate Power (Red), Received Data (RX) (Green), and Transmitted Data (TX) (Red).
Connections
The six pin connection on the left hand side of the modem is used to connect the modem to the RS232 port on the computer.
The connection is made using the 6 pin - 25 pin adapter that is shipped with the modem and a 6 pin "swapped" cable. When
looking at both ends of the cable (held facing the same way and in the same direction) the color codes of the wires inside the
connectors should be opposite to each other. The right-hand 4 pin connector is where the phone line is connected to the
modem. The middle 4 pin connection is for an optional phone.
Jumper Settings
JP1 selects the pulse dialing option. OFF = North American, ON = European.
Power Supply
Input - 110VAC
Output - 12 VAC, 150mA
Parts
1 DSC modem
1 6-pin patch cable
1 6- to 25-pin adapter
1 12 VAC 800mA power supply
1 4-pin patch cable
Connection to Computer
DO NOT apply power until all connections have been made and verified. Improper connection may damage your computer or
modem.
Connect the 6-25 pin adapter to your RS232 port using the female to female connector. Connect the 6 pin cable from the 6-
25 pin adapter to the 6 pin connector on the Modem.
Connection to Phone Line
On the modem, there are two four-pin connections. The middle 4-pin connector is for an optional phone. The connector on the
right is for the incoming phone line from the wall connector. When the modem is in communication, the optional phone
connection will be automatically disconnected for the duration of the communication.

Specifications

Baud Rate: .............................. 110, 300 and 1200 bps
Parity: ...................................... 8 data bits, no parity, 1 stop bit
Dialing: .................................... Touch Tone dialing (DTMF) or Pulse dialing
Power Requirements: ............ 12 VAC, 150mA
Operating Temperature: ........ 0 - 40

Usage

Note: The MD-12 can only be used with DLS-1 v6.2 and up. Please refer to the DLS manual for modem communication
instructions and computer configuration requirements.
MD12
Modem
INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS
Software Version 1.0
o C, 32 - 110 o F