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Dear Midrange-L: A word of warning to those of you attempting to use IBM 5294 WS controllers on 56k digital lines: be prepared to spend a few hundred bucks extra for DSU's. We didn't; and after two nightmarish weeks involving not only the phone company and DSU manufacturer techies but also two high powered gurus with a protocol analyzer, we figured out the problem. The 5294 controller's interface is prone to intermittent fluctuating voltage levels which do not affect slow speed modems but cause random, unexpected line degradation and failure in the low-end (=cheap, <$350) DSU's recommended by the phone company. Replacement of these DSU's with more flexible (=expensive, >$750) units seems to have solved the problem (as spending money often does <g>). To TELCO's credit, they did pay for part of the replacement cost ... HTH, Willy ---------------- Willy Wilson willy@riback.com Columbia, MO USA ---------------- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * This is the Midrange System Mailing List! To submit a new message, * * send your mail to "MIDRANGE-L@midrange.com". To unsubscribe from * * this list send email to MAJORDOMO@midrange.com and specify * * 'unsubscribe MIDRANGE-L' in the body of your message. Questions * * should be directed to the list owner / operator: david@midrange.com * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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