A DECNET/IBM gateway for 3270 remote terminal access to IBM systems from vax nodes of a DECNET network
1987; Elsevier BV; Volume: 45; Issue: 1-3 Linguagem: Inglês
10.1016/0010-4655(87)90188-3
ISSN1879-2944
Autores Tópico(s)Embedded Systems Design Techniques
ResumoThis paper describes terminal access to IBM Systems from VAX nodes of a DECNET Network through the 3270 terminal emulation protocol. Each IBM system is connected to one of the VAX nodes through a BSC-synchronous line. This link is handled by the DEC-3271 Protocol Emulator that allows VT100 terminals of the VAX to appear as real 3270 terminals. As the 3270 terminal is full screen oriented, whereas the DECNET Virtual Terminal is line oriented, remote access to the IBM from any node of the DECNET network through the DECNET Virtual Terminal is inefficient and a different mechanism must be found. A remote resource access mechanism, based on the concept of the ‘pseudodevice’ that can access through the network to the real device, allows the 3270 terminal emulator to run on each DECNET node with the same efficiency as running on the VAX directly connected to the IBM. At present this application is installed on each VAX node of the Italian High Energy Physics Network and it provides 3270 terminal access to the IBMs of the main Italian Computer Centres as well as to the IBM at CERN.
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