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- Path: valinor.mythical.com!valinor!n5ial!jim
- From: jim@n5ial.mythical.com (Jim Graham)
- Newsgroups: comp.dcom.modems
- Subject: Re: Astounding high CPS rate!
- Message-ID: <1996Jan13.175648.9337@n5ial.mythical.com>
- Date: Sat, 13 Jan 1996 17:56:48 GMT
- References: <4cvsii$h0@horus.infinet.com> <4d3smg$cbi@news.hal.com> <DL1vxE.2yp@freenet.carleton.ca>
- Organization: Okaloosa Island dep't of fishing/brewing/ham radio/computers
-
- In article <DL1vxE.2yp@freenet.carleton.ca> an171@FreeNet.Carleton.CA
- (Anthony Hill) writes:
-
- >Dwight Elvey (elvey@hal.COM) writes:
- >>
- >> for 9600 baud connections.
-
- First, keep in mind that there aren't any 9600 baud modems for PSTN lines.
- 9600 bits/second (bps), yes, but 9600 baud, no. There's a big difference,
- btw...the two are *NOT* interchangeable. There are cases where they are
- equal, but they still aren't the same thing.
-
- > Well, FWIW the absolute maximum that a 14.4 will transfer data at
- >without the use of compression is 1800cps, this is the very defintion of a
- >14.4 modem. In reality you'll never see those kinds of speeds, since
- >error control requires some overhead. Almost all 14.4 modems on the
- >market will transfer data at around 1700cps. Of course, the software used
- >to measure throughput for modems ranges from the "almost accurate" to the
- >"intentionally misleading" <cough> Terminate <ahem>.
-
- This is true. And let's not forget that the files being transferred must
- be large enough to provide a reliable test. I've seen cases in my UUCP
- logs where an incoming (uncompressed) e-mail (Taylor UUCP, 'i' protocol)
- arrived at something like 4500 cps. Neat trick, considering the fact that
- my Courier DS's (V.32bis, large footprint, rect. LEDs) serial port only
- goes to 38.4 kb/s..... :-) Of course, if you look at the size of the
- files, they were typically around 1--3k, hardly enough to make a reliable
- test.
-
- Later,
- --jim
-
- --
- 73 DE N5IAL (/4) MiSTie #49997 < Running Linux 1.2.13 >
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