On 2/18/2013 1:14 PM, Anne & Lynn Wheeler wrote:
part of the 3270 terminal & terminal emulation ecology was the long runs of coax cables from the datacenter all over the building to each 3270 ... for some large buildings the weight of the coax cables were approaching building safe loading limits. a lot of the effort that went into token-ring by the communication group was to use token-ring to replace coax cables (significantly reducing the weight) for terminal emulation.
We kept the IBM units on one floor, mostly for operators, programmers, and customer support. For data entry, we used ITT controllers and terminals; they had the advantage that the boards could be removed from the controller and placed in what was essentially a power supply. This reduced needed cables by a factor of 8. We also tried AT&T unit with flat cables, but those kept failing due to interference.
Gerhard Postpischil Bradford, Vermont ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
