Resumen
Security space systems have been designed and implemented is one of a set of interface design is useful for acompany or agency in terms of security. This system also has the advantage that is effective and efficiency withrespect to time and effort in monitoring the security of space with a centralized control system. Electronic circuitsare used in the implementation of the security system of spaces include: Personal Computer, phone interface, DT-51Minimum System, alarm and light detector interface. SoftwareKeywords: Phone, DT-51, Alarm