home *** CD-ROM | disk | FTP | other *** search
- Path: sobt.accessorl.net!user
- From: eric@accessorl.net (Eric Shaw)
- Newsgroups: comp.sys.mac.comm,comp.dcom.modems
- Subject: Re: faster than 28.8
- Date: Sat, 10 Feb 1996 22:43:54 -0500
- Organization: Access Orlando
- Message-ID: <eric-1002962243540001@sobt.accessorl.net>
- 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> <4fct8h$i28@news.xmission.com>
- NNTP-Posting-Host: sobt.accessorl.net
-
- In article <4fct8h$i28@news.xmission.com>, bmwright@xmission.com (Just Me)
- wrote:
-
- > 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?
-
- I am absolutely positive that this isn't the problem. These modems were
- directly connected - not using the terminal server, or a phone line even,
- just a phone cord between the line jacks. The computers at both ends can
- handle 230.4Kbps without any errors (but the modems only work up to
- 115200). All I have to do is switch the Couriers with other modems, and
- send ATX3D on one end, ATA on the other to connect the new modems, and I
- get faster transfers.
-
- 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
-
- Keep in mind, PPP has its own compression, so not as much data goes
- through the serial port. SLIP can also be using CSLIP compression, before
- the data gets to the modem. Therefore, normal Zmodem file transfers tell
- you more about the modem's ability.
-
- >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.
-
- According to Doug Haire's figures on the same file I used, his Couriers do
- not exhibit this problem, so it is possible that it could be a problem
- with the older Couriers we have, made when v.34 was first coming out, then
- flashed to v.34+.
-