A Transputer based o si-gateway for LAN-interconnection across ISDN

Abstract

Interconnections of remote local area networks (LANs) across public networks are of growing interest. This paper presents an OSI (Open Systems Interconnection) gateway to interconnect LANs across Integrated Services Digital Network (ISDN). The OSI connectionless network protocol (CLNP) supports interconnection of different subnetworks. The most important component of the gateway is an adaption layer to integrate ISDN into the gateway structure. The main task of this adaption layer is mapping the service provided by the connection oriented ISDN subnetwork to the service expected by CLNP and vice versa. It is designed to fulfil requirements on fairness, low costs, and acceptable performance. The gateway components are implemented on a multiprocessor platform built with Transputers.