On 08/29/2011 10:32 PM, C F wrote:
On Mon, Aug 29, 2011 at 4:32 PM, Cary Fitch<[email protected]> wrote:
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of C F
Sent: Monday, August 29, 2011 3:18 PM
To: [email protected]; Asterisk Users Mailing List - Non-Commercial
Discussion
Subject: Re: [asterisk-users] Dragging the dialup customers along, possible?
From what you are asking it appears that you are trying to run similar
to a fax (modulation and demodulation) over VoIP.
Try again, the fact that you succeeded twice was pure luck, and as far
as I understand that didn't even work out.
Switch back to TDM. Your dial up modems want that magic thing called
timing and no jitter that only TDM will give you.
===========================
This is more of a whimsical statement than a scientific one, but I would
think in today's world, there would be a real small box that would take in
IP and put out TDM with good timing with a moderate buffering window.
Obviously, the IP has to actually get to the box in a timely fashion, like
"today" , but a TDM circuit has to be "up" also.
A box that would take in IP data..., look for valid "ascii", and otherwise
put out TDM modem tones with no data content for "1 second" and then pick up
the data as it catches up.
So you want to develop the equivalent of T.38 for dial up?
It already exists; it's called V.150.
--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: [email protected] | SIP: [email protected] | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org
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