Telesurveilling system based on the ISDN

Abstract

This article is a proposal of a telesurveillingsystem based on the ISDN - Integrated Services DigitalNetwork. The article is structured in several sections covering thefollowing subjects: system architecture and ISDN services, functional description, structured analysis and project, andperformance evaluation of implemented system. The basic components of the system are a centraltelesurveilling station and one or several remote stations, thatcommunicate through the ISDN. The purpose of the system isto allow the transfer of images (still or moving pictures) fromthe remote station whenever it is requested by the operator ofthe central station or when an abnormal situation occurs in aremote station; in this late case this is related with theactivation of one of the sensing devices installed in the remotestation. The performance evaluation of the system leads tothe conclusion that its behaviour is appropriate to itspurpose, and also that ISDN provides a good support, for thistype of application.