Re: Out of Band Connectivity Via Modems

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> 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.
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at: http://www.groupstudy.com/
> list/CCIELab.html

Blogs and organic groups at http://www.ccie.net
Received on Sun Aug 31 2014 - 19:07:54 ART