Speaking from past experience, I too was using a Sportster V.90
on a line incapable of supporting high V.90 connections. I would
connect around 48K but would soon drop off after a minute or so.
By experimenting, I found that I could keep the connection up
by setting a ceiling on the connect speed.
AT&F1&M5&N29&U28
Which sets:
&M5 (Error Control only)
&N29 44,000 Ceiling
&U28 42666 Floor
You may wish to look at the following URL for more information.
http://www.livingston.com/tech/bulletin/
Rock
>Date: Wed, 12 May 1999 12:49:49 -0600
>From: Craig Baird <bairdc@xpressweb.com>
>X-Mailer: Mozilla 4.5 [en]C-CCK-MCD (Win95; I)
>X-Accept-Language: en
>To: portmaster-modems@livingston.com
>Subject: Re: (PMOD) RE: (PM) Modem slow-down with 3.8.2c2
>Sender: owner-portmaster-modems@livingston.com
>Reply-To: Craig Baird <bairdc@xpressweb.com>
>
>I would tend to agree with this. I happen to have a phone line at my
>house that I'm 99% certain is not V.90 capable. Back before V.90, I
>used a Supra 28.8 modem, and never got better than 26.4, and often got
>19.2. Now, against the PM3, On this line I consistently get 28.8
>connects with both an LT winmodem and a Zoom dualmode external (with the
>Lucent venus chipset), Yet I have a USR Sportster external that insists
>on connecting at 49,333 from this line. When this happens, I get
>nothing but renegs, and quite often, disconnects. The only thing that
>fixes it is to lock it to V.34. I'm absolutely convinced that this
>modem is just way too agressive when it connects. I think there are a
>lot of modems with the same problem--I also think most of them are
>USR's. Yet having that said, our highest recommended modem is the USR
>Sportster. They work great if you force them not to be so agressive.
>I've also been quite impressed with this Zoom (Lucent venus chipset)
>modem. I think I'm going to start recommending those.
>
>Craig
>Xpressweb Internet Services
>bairdc@xpressweb.com
>http://www.xpressweb.com
>
>
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