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- Path: giskard.demon.co.uk!dale
- From: dale@giskard.demon.co.uk (Dale Shuttleworth)
- Newsgroups: comp.sys.mac.comm,comp.dcom.modems
- Subject: Re: faster than 28.8
- Followup-To: comp.sys.mac.comm,comp.dcom.modems
- Date: Thu, 1 Feb 1996 19:03:33 GMT
- Organization: Dale's home Linux box.
- Message-ID: <DM429x.w4@giskard.demon.co.uk>
- References: <sumner-2001961038000001@sumner.tiac.net> <4ds0fp$4ap4@news-s01.ny.us.ibm.net> <AD29910A96685C7229@asd-stat13-153.dial.xs4all.nl> <bgrubb-2301960739100001@10.0.2.15> <4e3lbi$r3m@brachio.zrz.TU-Berlin.DE> <eric-2601960120540001@sobt.accessorl.net> <DM0A30.1x@giskard.demon.co.uk> <eric-0102960011580001@sobt.accessorl.net>
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-
- Hi,
-
- Eric Shaw (eric@accessorl.net) wrote:
-
- [...]
-
- : Yes, that would be the US Robotics to which I refer. Perhaps they can get
- : this 3:1 compression ratio at 14.4Kbps, but the ones we have here do not
- : achieve this ratio when connected at 28.8 or 33.6. When directly
- : connected, sending a ridiculously compressible file (PKZip gets over
- : 1000:1), they achieve slightly over 6K/s. I believe this to be due to the
- : speed of the processor in them (waiting for it to compress), in which case
- : they would still be around 6K/s on a 14.4Kbps connection (around a 4:1
- : ratio), but I haven't tried locking the USR's at 14.4 yet, so I don't know
- : for sure. At 28.8, this is not even a 3:1 ratio.
-
- I know for a fact (and am quite happy to demonstrate) that my Courier
- can achieve near 11520 bytes/sec on highly compressible files. I have
- even seen some five second periods of PPP traffic where 10kbytes/sec
- was sustained. I believe that the Sportster shares much of the same
- hardware as the Courier so I would be surprised is it did not perform
- similarly in this respect.
-
- I suggest that you may have poor telephone connections, are using faulty
- modems or your measurements may be flawed in some way.
-
- Dale.
-
- --
- ******************************************************************************
- * Dale Shuttleworth *
- * Email: dale@giskard.demon.co.uk *
- ******************************************************************************
-