You're probably right. We tried dialing in to it many, many times and it
would answer but it would not negotiate with the modem on our end; we would
just get silence.
It's interesting that dialing in with a modem would not cause it to reset,
but dialing in on a phone and then sending random tones resolved the
problem. Pretty strange, but it worked!
> Hi John,
>
> I would have thought that if the modem was truly locked up you would have
received busy tone from the PSTN switch.
>
> What might have occurred is that the modem on release (DCD down) might
not have dropped DSR back to the PC or whatever device. You calling the
modem it answered DCD came up. You dropped the call DSR dropped and was
recognised by the device and your back in business.
>
> Not that it matters it worked. This is more of a thought as to why it
worked.
>
> Teunis,
> Hobart, Tasmania
> Australia
>
> On Wednesday, February 21, 2001 at 05:50:33 AM, John Neiberger wrote:
>
> > Actually, this isn't really a troubleshooting trick, but a potential
fix for
> > a modem that is locked up. We came in at 4:30 this morning to do some
> > intrusive testing that would take down every automated teller machine
in our
> > network for the length of the test. We went through the first steps in
the
> > process which took everything down, and then tried to dial in to a
remote
> > router that we were testing with. One problem...the modem would
answer, or
> > at least pick up, but then would not do anything. It seemed to be
completely
> > hung.
> >
> > This was a bad thing. If we didn't do the test today, we'd have to
come in
> > again tomorrow morning at 4:30 and none of us were looking forward to
that.
> > While pondering our options, I thought of something: call the modem
using a
> > regular phone and just start punching buttons on the phone when the
modem
> > answers. My reasoning was that maybe some bursty noise would wake it
up.
> >
> > We tried it, and to our *great* surprise it actually worked! So, if
you
> > ever have a hung modem and there's no one around to reset it, give this
a
> > try.
> >
> > Regards,
> > John
> >
> >
> >
> >
> >
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