A transputer based OSI-gateway for LAN-interconnection across ISDN

Interconnections of remote local area networks (LANs) across public networks are of growing interest. The paper presents an OSI gateway to interconnect LANs across 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