Connecting digital communication network to analogue network - starting time generator on each digit from subscriber to starting exchange of digital network

摘要

The connection between a digital telecommunications network with a central code system and an analogue telecommunications network with a signalling system is carried out without selection end and start sign. Each subscriber transmits a digit to the original exchange of the digital network to start a time generator. On the time generator run, the characteristic signal of the code system is transmitted to a destination exchange, forming the transition to the analogue network. On the characteristic reception in the destination exchange, a selection end sign in the code system is transmitted to the original exchange, followed by a start sign of the destination exchange. USE/ADVANTAGE - Telecommunications control systems. Establishment of connection between two networks not affected even if the analogue network offers special service using analogue signalling without dial codes.