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- Path: hal.COM!elvey
- From: elvey@hal.COM (Dwight Elvey)
- Newsgroups: comp.dcom.modems
- Subject: Re: Astounding high CPS rate!
- Date: 16 Jan 1996 02:20:26 GMT
- Organization: HAL Computer Systems, Inc.
- Distribution: world
- Message-ID: <4df21a$du0@news.hal.com>
- References: <4cvsii$h0@horus.infinet.com> <4db4ra$56@hg.oro.net>
- NNTP-Posting-Host: civic.hal.com
-
- In article <4db4ra$56@hg.oro.net>, estarry@oro.net (Ed Starry) writes:
- |>
- |> Most, if not all, BBS's & ISP's 'Do Not' have compression enabled. It takes
- |> *TWO* properly configured modems and with a BBS on one end you will never
- |> see true high speed compression. Not knowing exactly what your set-up is
- |> there's a high probability you've inadvertently stumbled onto what most
- |> people believe to be impossible, 'Zip files ARE compressible!' If you have
- |> 16550 UART's and are able to set the TxFIFOBuffer to 16 give it a try, now
- |> send to yourself on the other PC. Depending on your modems capabilities and
- |> their configuration you could see rates of 5,000 cps, or higher, for <*.zip>
- ^^^^^^^^^^
- |> files!
- |>
-
- Hi
- I think not. For a text file maybe. In order for a file to be
- compressed it needs to have redundent information in it. Once
- a file is zipped, almost all of the redundent information is
- removed. One may see a slight increase in transfer speed with
- compression at the modem turned on but this is not because the
- modem is actually compressing, it is because the modem is
- sending blocks of data in syncronous mode that doesn't require
- the start stop framing bits. I have never, on any 14.4K modem,
- seen 5000 cps, with a *.zip file.
- IMHO
- Dwight
-