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Re: (ASCEND) Intermittent loss routes?
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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