dbarnes@garth.UUCP (Dave Barnes) (02/15/90)
A few questions for you modem experts. I'm evaluating a
2400 baud modem I just bought (30 day return policy) and
want to know what to look for. How do I tell good
performance from bad performance? For example, on file
transfers, what percentage of bad blocks to good
blocks is acceptable/normal? What is good throughput
at 2400 baud, how many characters per second, etc.?
My old 1200 baud modem was nearly perfect (an occasional
bad block, never an aborted download, never a dropped
carrier). This new one has not given me any garbage or
scrambled characters or dropped connections in three or
four evenings of calling, but I did experience one aborted
download (aborted after 10 bad blocks) against about a dozen
successful 100% efficient file transfers (and these are big
files -- over 100kbytes). The aborted download was the
second file I downloaded, so I've been a little nervous
since. I didn't see the aborted download happen so I
don't know what the cause was (call waiting was disabled,
BTW). Throughput has been consistently 233 cps in
Batch YMODEM protocol.
Aside from this aborted download, things have been fine.
Do I have anything to be concerned about (regarding the
above aborted download incident), or is this just "new
buyer Angst"?
Your E-mailed opinions and answers to the above
questions are most welcome.
--
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David Barnes
UUCP: {pyramid,sri-unix,ingr}!apd!dbarnes 415/852-2365
USPS: Intergraph APD, 2400 Geng Road, Palo Alto, CA 94303
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