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- Path: in1.uu.net!insync!usenet
- From: bubba@insync.net (Bill Garfield)
- Newsgroups: comp.dcom.modems
- Subject: Re: Multitech and disconnects
- Date: Sun, 03 Mar 1996 17:28:46 GMT
- Organization: Associated Technical Consultants
- Message-ID: <3139d094.1006366@news.insync.net>
- References: <4h3kji$qhn@news.netam.net> <313943c5.27674375@news.teleport.com>
- Reply-To: bubba@insync.net
- NNTP-Posting-Host: line-233.insync.net
- X-Newsreader: Forte Agent .99d/32.182
-
- curt@teleport.com (Curt...) wrote:
-
- >baron@alpha.netam.net (Baron Chandler) wrote:
- >
- >> Hello, all. We're an ISP with several Multitech 2834 MR modems... We are
- >> having problems with disconnects and people getting trash when connecting
- >> (Protocol: NONE is displayed by the calling modem)...
- >>
- >> Is anyone else having these problems? Does anyone have a suggestion? It
- >> seems like dirty lines but I am not completely convinced...
- >
- >
- >Tell your customers to set their modems to not accept connections which do not
- >negotiate V42.bis error correction protocol. Garbage and disconnects on 28.8
- >modems are frequently a result of a non-error correction connection. Most modems
- >have a command or s-register setting to tell the modem to not connect to modems
- >that have failed to negotiate error correction. This may cause more redial attempts,
- >but when they get a connect, it will be solid. This is a pretty common problem.
-
- Curt's recommendation is a good one.
-
- We operate a couple central site host systems, and have long ago
- realized that at modem speeds above 9600 bps that in general, non-error
- correcting high speed connections simply are not survivable, period.
-
- Unfortunately, locking one's modem in
- "forced-error-control-else-don't-connect" mode usually requires
- performing some unnatural act, like reading the manual and finding the
- command to effect that instruction. :)
-
- On Multi-Tech brand modems the command is &E2 and on USR modems it's &M5
- but that's only two out of a blue-bazillion brands.
-
- Of course the central site host operator could lock the host modems in
- forced-error-control-else-don't-connect mode, but in our case that would
- be a bad decision since we still have 1/4 of our customer base calling
- in at 2400 bps and below. We are not an isp, but do operate a large
- online order entry system, for which 2400 bps is still perceived as
- adequate for many customers.
-
- The best idea I've heard tossed around is a host system that can be set
- up to require E/C at speeds of 4800 and up but allows non-E/C
- connections below 4800.
-
-
-