Ascend Archive
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Re: (ASCEND) Intermittent loss routes?

There's also a big chance that it's the 'ol USR Sportster bugs showing up
again.

Alex P

On Tue, 19 May 1998, Ricardo Freire wrote:

> Chen,
> 
> I think there's a BIG chance that your customers have noise in THEIR
> analogic lines.
> In such cases, the connection behavior looks exactely like you described.
> But, what causes those "lags"?
> 
> 1) modems' fallback/fall forward: when connection conditions change due to a
> noise, some modems can re-negociate the connection speed. It longs for 15
> seconds, or more.
> 
> 2) modems retraining: when more severe conditions occur, the modems can
> reinitiate ALL the connection, from handshaking! It takes 40-60 seconds, and
> in the meanwhile NO data traffic is possible!
> 
> 3) The third case is simply the disconnection, caused by some noise level
> that the modems cannot handle.
> 
> Your customer can hear events (1) and (2): in modem
> settings/connections/advanced/extra settings, they can put M3, which is the
> modem command to make buzzer stay up. When, for example, retraining occurs,
> they will be able to hear the SAME sounds they hear everyday, when
> connecting normally.
> 
> So, they have to contact local teclo, to fix their lines.
> 
> Regards,
> 
> Ricardo
> 
> 
> -----Original Message-----
> From: Stephen Chen <stephen@eni.net>
> To: ascend-users@max.bungi.com <ascend-users@max.bungi.com>
> Date: Terça-feira, 19 de Maio de 1998 15:05
> Subject: (ASCEND) Intermittent loss routes?
> 
> 
> >Some of our dialup customers have complained about losing route to the net
> >after connected.  The problem is intermittent, the user can login and
> >access the net for certain amount of time, then unable to access the net,
> >and later on regain the connectivity, all within the same call.  Traceroute
> >(while having problems) shows extremely slow time (or timeouts) between the
> >MAX and user's dynamically assigned IP.  And 'modemdiag' shows the line
> >quality to be 20-40 (excellent).
> >
> >Is this some type of routing problem, or something more serious?
> >
> >The MAX are 4004 running either 6.0.0 or 6.0.2, with average of 3 PRI lines
> >and 6 K56-mod12 cards.  MAX is not running OSPF, with a static route to the
> >gateway.
> >
> >any help is greatly appreciated.
> >
> >Regards,
> >
> >Stephen
> >Epoch Internet
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> 
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