Performance analysis of the AP and the SSC and design of the system overload controls of India's C-DOT digital switching system

Government of India's Centre for Development of Telernatics (C DoT) has developed a modular, distributed telephone switching system. There is an ongoing effort to model, analyse, and optirnise the teletraffic performance of this switching system. In this paper we report the methodology and results of a part of this work. We use analytical queuing models to estimate the capacities of the Administrative Processor, and the Space Switch Controller. We formulate the system overload control problem as a constrained optimisation problem, solve the problem, and use simulations to evaluate various adaptive overload control algorithms.