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- Path: newsfeed.internetmci.com!xmission!xmission!not-for-mail
- From: bmwright@xmission.com (Just Me)
- Newsgroups: comp.sys.mac.comm,comp.dcom.modems
- Subject: Re: faster than 28.8
- Followup-To: comp.sys.mac.comm,comp.dcom.modems
- Date: 8 Feb 1996 13:19:13 GMT
- Organization: XMission Internet (801 539 0900)
- Message-ID: <4fct8h$i28@news.xmission.com>
- 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>
- NNTP-Posting-Host: xmission.xmission.com
- X-Newsreader: TIN [UNIX 1.3 950824BETA PL0]
-
- Eric Shaw (eric@accessorl.net) wrote:
- : In article <DM0A30.1x@giskard.demon.co.uk>, dale@giskard.demon.co.uk (Dale
- : Shuttleworth) 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.
-
-
- Are you sure you just don't have a really crappy COM port/UART, a
- crappy OS on your end, or crappy/misconfigured/DTE limited terminal
- servers? When I connect to another Courier with an IP connection even at
- 26.4 or 28.8 I can _easily_ get the modem to max out the DTE 115,200bps
- limit while doing transfer both ways simultaneously. ~11.3KB/sec (remeber
- there's also overhead from the packet headers with SLIP/PPP) going both
- ways on a 2 meg file generated by piping 'ls -lR /' into a file. If the
- DTE could go any faster I'm sure the modems would pump more data at the
- 28.8 or 31.2 connect rates I normally get.
-
-
- --
- bmwright@xmission.com
-
-