[184766] in North American Network Operators' Group
Re: Dial Up Solutions
daemon@ATHENA.MIT.EDU (Stephen Satchell)
Sun Oct 18 20:21:49 2015
X-Original-To: nanog@nanog.org
To: nanog@nanog.org
From: Stephen Satchell <list@satchell.net>
Date: Sun, 18 Oct 2015 17:21:46 -0700
In-Reply-To: <alpine.LRH.2.02.1510181526350.24384@namshub.die.net>
Errors-To: nanog-bounces@nanog.org
On 10/18/2015 03:38 PM, Aaron Hopkins wrote:
> It appears to be limited to 14.4k due to patent issues and handles faxes
> only, but its existence suggests writing a software-only data modem should
> be possible.
That's exactly what WinModems were, back in the day. The board was
nothing more than a DAA, a codec, and an ASIC to transmit and receive
the raw data. For V.34, the software required about 60 MHz of clock;
for V.32 bis the load was closer to 24 MHz.
