Network system at INS

The INS (Institute for Nuclear Study) computer system consists of two large general purpose computers(FACOM M-380, M-200), two super mini-computers(FACOM S-3500) and three mini-computers(PANAFACOM U-400). The on-line real time system for experiments using accelerators at INS is constructed by M-200, S-3500 and U-400 computers. U-400 is directly coupled with the M-200 by a channel to channel connection method and S-3500 is connected by an optical fiber method called as a flexible system link. To improve the utility of the M-380 system, a small LAN (Local Area Network) system was constructed and completed at December in 1986. About 60 users can connect with their own personal computers by a RS-232C cable to this LAN with a speed of 9600 baud. Communication to the M-380 from outside the institute became possible as of November using a DDX-packet Network (Japanese commercial X.25 lines supported by the NTT Ltd.). Some useful softwares for using LAN and DDX are developed and installed by the computer room. These softwares are a TSS terminal emulator program, a file transfer program, mail and board systems. In this report, hardware of this network, usage and connection to this system and available softwares are described. (author)