ISDN - it is a digital network of integrated service (Integrated Services Digital Network - ISDN) which creation is a perspective direction in development of telecommunication networks. Such network, on the basis of the unified means of transfer, distribution, processing, storage and delivery of the information, will give subscribers a wide spectrum of information service.

Elcon, Aethra products

	Network ISDN-terminals
	NTBA - network terminal (ELCON Systemtechnik)
	N1 + 2a/b - network terminal (ELCON Systemtechnik)
	NT1 + Multi - network terminal (ELCON Systemtechnik)
	NT1 (AETHRA Telecommunication)
	NT-Plus (AETHRA Telecommunication)
	NT-IP (AETHRA Telecommunication)