Novel Approach of Hybrid Switching System using Combined SPC and VLSI technology

Speed and size are two important factors while designing the electronic system. It’s Speed of operation and flexibility to modify, measures the performance of the system operation. Microprocessor/microcontroller (MPMC) system can handle sequential operations with high flexibility and use of Complex Programmable Devices (CPLD) can handle concurrent operations with high speed in small size area. So combined features of both these systems can enhance the performance of the system. High performance Hybrid Telephone Switching System (HTSS) is designed using combination of stored program control (SPC) and VLSI technology. Call handling operations are handled by concurrent operations using CPLD and complicated sequential operations like service handling are handled by MPMC. VHDL codes are designed and tested for different call handling operations. The test benches are designed to act as MPMC for the testing of services like Do Not Disturb (DND), Call Forwarding (CF), Outgoing Bar (OGB) and STD Bar (STDB) facilities. Call handling speed of available system designed with MPMC and proposed system designed with CPLD is compared.