SAS Access Systems provides emerging technologies and “state-of-art” access applications.  SAS sells, installs and services building access control and CCTV Systems using the WinDSX System.

System Overview

dsx-logoThe WinDSX System is a PC based Building/Facility Management and Monitoring System used to control and monitor personnel and alarm activity. By making extensive use of distributed processing, the DSX System integrates access control, alarm monitoring, elevator and HVAC control, guard tour, time and attendance, and video imaging into a single Windows based system using an ordinary PC.

Distributed Intelligence

The DSX System provides five different control panels, which offer various combinations of card reader and keypad inputs, relay outputs, and alarm inputs. These panels can be combined to provide the exact number of inputs and outputs required for each application. All DSX panels use a fully distributed architecture with all real-time processing performed at each DSX panel.

DSX Control Panels

DSX Intelligent Controllers are independent processing 2-door packages designed to be cost effective building blocks that allows expansion in a scalable manner. Up to 8 doors can be controlled from 1 enclosure for an efficient space saving package. The controllers are strategically placed throughout the customer location connected together with a two twisted pair cable. Each Controller operates as a fully intelligent and independent control panel that retains all data necessary for system operation in it’s own RAM. With it’s integral real-time Clock and Calendar it performs Time Zone control with Holiday overrides for inputs, outputs, and cards even when communication to the PC or other controllers is not available.

By distributing all information (time, date, valid codes, access levels, etc.), the DSX System provides significant advantages:

  • Instant response to Card Read or Keypad Entry regardless of system size.
  • No degradation of system performance in the event of a communication loss. All time zones, access levels, and holiday schedules remain operational.
  • No loss of transactions for system history files. All panels automatically switch to buffer mode storing up to 25,000 events per panel.

Instead of all processing power being centralized in one computer, it is distributed throughout the system. The processing occurs near each reader, which makes for a much more efficient and secure system.


The WinDSX Software is ideal for multi-location Central Station use as well as single location proprietary use. The multi-user, multi-location capacity allows customers to manage their own building or buildings nationwide from a central location.


The WinDSX Software is designed to support up to 32,000 separate Locations using a single PC or multiple PCs on a LAN/WAN. DSX defines a loop of up to 64 panels (Master and 63 Slaves) as one location. Each location has it’s own database and history files at the host PC. Locations may be combined to create a very large network of panels or may be maintained separately for control of up to 32,000 different locations/ buildings with as many as 128 readers or keypads at each location.