Re: Out of Band Connectivity Via Modems

at&fx1 - my faviourate command

On Wed, Sep 3, 2014 at 8:26 AM, mdb1986 <mattdbentley_at_gmail.com> wrote:

> If it helps anyone, the ati11 command on most modems will return some
> signal information - though sometimes it's only for the last connected call
> (which is a bit of a catch-22 when nothing connects in the first place).
> What the different AT commands mean is loosely the same, but there is a
> lot of variance depending on the modem you're talking about.
>
>
> On Mon, Sep 1, 2014 at 11:33 AM, Alexei Monastyrnyi <alexeim73_at_gmail.com>
> wrote:
>
> > Nice to hear we still have modems around :-)
> > It was so cool back then to distinguish by ear handshakes for different
> > speeds :-)
> > A.
> >
> >
> > On 9/1/2014 4:07 AM, mdb1986 wrote:
> >
> > Thank-you. As always seems to happen, the solution presents itself
> shortly
> > after I email this list. It appears to be more a function of the last
> mile
> > cabling to the affected modems. The horribly intermittent nature of the
> > problem and variance in the level of diagnostics available with AT
> command
> > set on the different modem chipsets make it hard too.
> >
> > Appreciate your insights.
> >
> >
> > On Fri, Aug 29, 2014 at 2:12 PM, Andrey Tarasov <andyvt_at_gmail.com> <
> andyvt_at_gmail.com> wrote:
> >
> >
> > Have you tried setting calling modem to 2400 baud and see if that helps?
> > If call is routed via VoIP infrastructure at any point you are most
> likely
> > out of luck getting anything higher. Usual disclaimers about different
> > codecs, ymmv, etc.
> >
> > Regards,
> > Andrey.
> >
> >
> > On 8/29/2014 12:55 PM, mdb1986 wrote:
> >
> >
> > Hello Experts:
> >
> > Does anyone here have a good way to debug a modem handshake? We are
> > seeing
> > a chronic problem of one modem dialing another modem, we see call "RING"
> > on
> > the remote modem, but it never connects. Calls seem to be processed out
> > our infrastructure fine. Carrier says they are routing as expected. I
> > suspect there are some parameters that are not being agreed upon between
> > the two devices, but the level of troubleshooting I'm able to do seems
> > extremely limited.
> >
> > A few AT commands which will show you the stats, signal quality, etc., of
> > a
> > call that connects, but nothing that shows what's occurring as the modems
> > are attempting to agree with one another, prior to call connecting.
> >
> > Thanks in advance.
> >
> >
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Received on Thu Oct 02 2014 - 22:38:00 ART