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               Message-ID: <3617CD85.57F30F09@concentric.net>
                     Date: Sun, 04 Oct 1998 15:33:25 -0400
                     From: Eric Durant <eadurant@concentric.net>
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                       To: Bruce Toews <Jeopardy@mail.com>
                  Subject: Re: 3com V.90 Modem
               References: <Pine.SUN.4.01.9810021434190.5372-100000@galileo.cris.com>
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Bruce Toews wrote:
> Hi. I'm wondering if this is normal. I have a 3com 56K V.90/X2 fax modem.
[...]
> Concentric, where we have KFLEX modems for the time being, I should,
> should I not, be able to get 33.6. But all I get is a very consistent 28.8
[...]

I also have a 3Com/USR V.90/x2 modem and never connect to a K56Flex line
at any speed other than 28.8kbps.

This modem supports "V.34+" at "..., ..., 33600" according to the
documentation.  (I'm guessing "V.34+" means "V.34bis" (?).)

One would hope that K56Flex server equipment would also support V.34bis,
but I don't have any information on this.  If the server equipment
supports V.34 (maximum of 28.8kbps), but not V.34bis, that would explain
why our modems connect consistently at 28.8kbps.

> Also, if I dial in to Concentric with my regular phone, I get a
> high-pitched tone for about two seconds, followed by a high-low two-toned
> thing before I hear the modem. Does anyone know what this all means?

What you describe sounds like the K56Flex negotiation tone (sorry, I
don't know the proper name for this); it is normal when calling a
K56Flex modem.

Eric Durant
---
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