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- Newsgroups: comp.dcom.modems
- Path: sparky!uunet!areyes!kilowatt!root
- From: root@kilowatt.uucp (Kilowatt admin)
- Subject: Re: PEP over SLIP?
- Message-ID: <1992Nov22.165712.820@kilowatt.uucp>
- Reply-To: root@kilowatt.UUCP (Kilowatt admin)
- Organization: Kilowatt Computing of Deer Park, NY
- References: <1992Nov16.213034.27895@eos.arc.nasa.gov> <1992Nov20.083723.11984@netcom.com> <sjsv1fo@rhyolite.wpd.sgi.com>
- Date: Sun, 22 Nov 1992 16:57:12 GMT
- Lines: 27
-
- >The latencies of interactive SLIP traffic over a pair of PEP modems
- >running large packets are kind of painful. As long as the offered load
- >is not above the modems throughput, that latency will be about 7
- >seconds (3500 byte buffers in the modems) plus any host queue
- >time--call it around 10 seconds.
- I've found something that helps turnaround times with PEP... use the
- command AT~D1S500=12 That makes the modem negotiate "mid-size" packets that
- can be sent down the low side of the line without turn-around. I think
- "mid-size" packets are something like 43 bytes long.
- When using PEP (Turbo-PEP) with a WorldBlazer, I can knock ping
- times down from 1100ms (> 1 sec!) to 500 or 600. Using this method I get (with
- compressed files) >2K/sec with FTP (WorldBlazers use 26Kbps modulation - with
- 23Kbps realized).
- This command also helps a lot on interactive sessions using PEP.
-
- Too bad Telebit won't tell what all those registers are that appear
- in the AT&V when I do a AT~D1 command. They've flat out refused to tell me.
- That's supposed to protect me from myself...
- Anyone else ever talk to Telebit and was told to try out a command that
- starts with the "AT~D1" ??? Post them unpublished registers!!!
-
-
- --
- Kilowatt Computing (516) 253-2805 Arthur A. Krewat
- 51 Winnecomac Ave. uunet!yale.edu!admiral!kilowatt!krewat
- Deer Park, NY 11729 (516) 586-4743
- WARNING! THIS ENTIRE ARTICLE IS UNDER PROTECTION OF A SMILEY :-)
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