Security Systems D220

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Security Systems d220 . User's Guide National Security Systems Inc (800)457-1999. Table of Contents About This User's Guide ........................................ .................................. 3. Introduction ........................................ ........................................ .................. 3. Security system Basics ........................................ .................................... 4. Controlled Points ........................................ ........................................ ....... 5. 24-Hour Points ........................................ ........................................ ........... 6. Keypad Keys.

3 About This User’s Guide This user’s guide shows you how to use and maintain your security system. It covers basic system functions, such as turning the system on

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