A study of distributed call handling method for VoIP service

摘要

Recently, the need of the VoIP engineering which integrates data and a voice rises. Call control, bearer isolation architecture becomes the main stream in the examination of the next generation network which should become the base of the service provision of these data voice integration services. In this paper, authors clarify the basic call processing flow of the IP-PSTN interconnection call and toll by-pass call. In addition, we propose the application area of each basis plan of discussing connection method to the PSTN, circuit selection logic, circuit condition enquiry method.