Journal of the Korean Professional Engineers Association (기술사)
- Volume 23 Issue 1
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- Pages.49-63
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- 1990
A Change and Perspective of International Telephone Signalling System of Korea and World Main Countries
한국및 세계주요국에서의 국제전화 신호방식의 변천과 전망
Abstract
A signalling system generally designates electrical conditions and transmissionㆍreceiving programs of exchange control use signals concerning the establishmentㆍreleaseㆍtariff etc of calls between telephone subscribers and an exchange office or inter-exchange offices. In signalling system, different systems are being used according as communication service for control. With the development of exchange and transmission technique and higher functional advance, there exist many kinds of signalling systems. As for the signalling system used in international communication, an international standardization is specially important for the exchange of each country to operate properly and execute a smooth exchange connection. A term "signalling system" is chiefly used in telephone exchange system, while in telex exchange system "signalling condition, " and in data exchange system "protocol" is used. "protocol" is used.; is used.
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