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- Path: news.primenet.com!not-for-mail
- From: bigrex@primenet.com (Bob Nixon)
- Newsgroups: comp.dcom.modems
- Subject: Re: Is USR going to support 42bis+ on future courier upgrades?
- Date: 23 Mar 1996 20:36:01 -0700
- Organization: primenet.com
- Sender: root@primenet.com
- Message-ID: <4j2fv1$8kf@nnrp1.news.primenet.com>
- References: <4j0091$pli@nnrp1.news.primenet.com> <4j1phk$v0k@seminole.gate.net>
- X-Posted-By: ip21-107.phx.primenet.com
- X-Newsreader: WinVN 0.99.7
-
- Not to sound sarcastic but your not really saying anything new. I use a
- corel.cdr file to check my providers DTE honesty factor and max or nearly
- max the 115200 dte. What I was eluding to, is there some new compression
- scheme that actually is able to compress "TEXT" files to twice as fast. Or
- say a text file that goes through at say 7800 or 2x 3900, hense 2:1
- compression. My question was is this new v.42bis+ standard capable of
- compressing at 4:1 vs 2:1 for speeds of 15600cps or roughtly 156000bps or
- greater. My guess is probably no as on the fly disk compression seldom
- exceeds say 2.5:1 compression ratio for text files. If the 8:1 potential
- was a reality that would really be a boost to v.34 modems. Win-95 and
- probably others OS's support dte's at the serial ports of up to 960000bps.
- Whether the current crop of 16550 uart's are up to the tast is yet another
- question.
-
-
- In article <4j1phk$v0k@seminole.gate.net>, dhaire@gate.net says...
- >
- >Bob Nixon (bigrex@primenet.com) wrote:
- >: I'm wondering if USR will come up with a V.42bis+(230,000 dte 8:1
- >: compression) on the couriers? Is this just a sales gimmick? Can you
- >: actually get twice the compression on say text files 2.5:1 to say 5:1?
- If
- >: this is possible it would seem with V.34+ and V.42bis+ and given the
- fact
- >: that most current ISDN setup's don't support compression it could give
- >: Analog modems a more competitive edge against ISDN. Text throughputs in
- >: the 13 to 20k bytes/sec would be great if this isn't just a smoke
- screen.
- >
- >If one had the need to send highly compressible files, it would be more
- >advantageous to pre-compress them before sending. On some test files that
- >I have run (ones that PKZIP can compress at 10 to 1), I have hit the
- >upper limit of 115200 (actually a rate of about 11.3kcps). On "real
- >world" files, I have never hit this mark.
- >
- >In other words, it would simply be for the advertising advantage to go to
- >230k port speed.
- >
-
-