Designing an X.25 network-to-host interface

The development of packet-switched communications networks based on the CCITT X.25 standard has led to a requirement for means of interfacing host computers that have hardware and software developed for traditional circuit-switched environments.The paper results from studies performed for the Commission of the European Communities, and outlines a design for IBM 360 and 370 hosts that avoids application or system software changes by the use of a front-end processor. However, because a layered approach is adopted, the design may be readily adapted for use with hosts that have other communications architectures.