Information technology. Telecommunication and information exchange between systems. Private integrated services network. Circuit mode bearer services. Inter-exchange signalling procedures and protocol— 130 стр.
Information technology. Telecommunications and information exchange between systems. Private Integrated Services Network. Circuit mode bearer services. Inter-exchange signalling procedures and protocol— 110 стр.
Information technology. Telecommunications and information exchange between systems. Private Integrated Services Network. Circuit mode bearer services. Inter-exchange signalling procedures and protocol— 110 стр.