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- Path: in1.uu.net!xenitec!zswamp!zswamp!geoff
- From: geoff@zswamp.UUCP (Geoffrey Welsh)
- Newsgroups: comp.dcom.modems
- Subject: Re: USR 33.6 ... Link Naks = Poor performance?
- Date: Sat, 27 Jan 1996 18:56:07 EST
- Message-ID: <960127.185607.5o6.rnr.w165w@zswamp.UUCP>
- Reply-To: xenitec.on.ca!zswamp!geoff (Geoffrey Welsh)
- References: <4dmtr7$fi2@spectator.cris.com>
- Organization: Izot's Swamp
- X-Newsreader: rnr v1.28
-
- Bob Riffelmacher <rjr@cris.com> writes:
-
- > When I download a 1,512K zip file through my ISP, I get an average
- > transfer rate of 1.2K/second. I have downloaded this file several times,
- > both at peak (evening) hours and off-peak (early morning hours).
- >
- > From previous discussions in this group, I believe my CPS rate should be
- > significantly higher.
-
- Those figures are for ZMODEM directly from one computer to another; ftp
- through terminal servers, routers, etc. is a different game altogether.
-
- > The download progress, as reported by Netscape 1.22, moves along good, in
- > 2K and 3K blocks for a while, stops completely for several seconds, then
- > resumes. This pattern continues for the entire download.
-
- This is not unusual for ftp, especially if there's a lot of network between
- you and the ftp server (you'll never know unless you traceroute).
-
- > Invalid CRC's average 2, Overrun Errors are always 0. However, ATI6
- > always shows anywhere from 12 to 17 Link Naks.
- >
- > What caused Link Naks? Could the Link Naks be causing the poor
- > performance, and if so, what can be done to alleviate them?
-
- There will be occasional errors between the modems due to imperfections in the
- phone line; this is perfectly normal. These will be corrected and are
- _invisible_ to the application in terms of errors (the time delay should be
- too small to notice).
-
- --
- Geoffrey Welsh, Senior Developer, InSystems Technologies Inc.
- geoff@zswamp.uucp, [xenitec.on.ca|m2xenix.psg.com]!zswamp!geoff
- USENET has become the sanctuary of the Church of the Perpetually Injured Party.
-