SIGNAL SERVICE DEVICE AND METHOD IN ELECTRONIC EXCHANGES

摘要

The system for providing various signal services in the electronic telephone exchanger includes a controller connected to a switch network. A common signal service circuit (30) is centralised by a protocol processor (32) controlling the signal services like R2 MFC, DTMF, continuity check tone, and audio signal tone, and a real time processors (33-36) exchanging messages to peripheral devices through the switch network for connecting the signal service to a call process control routine of a call processor (31).