programming circuitry to preform all standand modem functionalities has
been done for years and is still being refined and/or upgraded
my observations of monthly flash rom updates from "some" (including USR)
mfgs suggest to me that it's always being refined to the "what speed does
the modem go this week" club...
livingston is going to do it the best way they know how...
1) sound engineering fundamentals
2) make upgradeable tight code
3) adjust
4) eat cheeseburgers
5) repeat as necessary
--->
Robert H. Hanson LAN/WAN Consultant - Internet Service Provider
Otis Orchards, Wa. Cutting Edge Communications www.cet.com
(509) 927-9541 finger: info@cet.com or email: roberth@cet.com
On Thu, 19 Sep 1996, Joe McGuckin wrote:
>
>
> One question that no one seems willing to answer is: Where did Livingston
> license the modem DSP code from?
>
> Is it true that the beta program did not include the modem cards?
>
> Considering the fact that writing a good modem that interoperates
> with all the wierd and cheapo shit modems out there is not a trivial task.
> Actually, I'd say it was an enormous amount of work. That's why USR have such
> a good rep - it's taken them a long time to refine their software.
>
> I'm concerned that nowhere in any of the web pages or press release info was
> there a detailed description of what is implemented in the modems.
>
> Specifically I'd like to know which ITU and Bell standards are implemented
> (e.g. Data 103, 212A, ITU V.21, V.22, V.22 bis, V.32, V.32 bis,
> Fax V.17, V.27, V.29
> ECC V.42, V.42bis, MNP
> and so on, ad nauseum.)
>
> Also since Livingston is playing up the ability to update the DSP firmware,
> I'm really interested to find out how much of the CPU is used in the current
> implementation. 80 percent? 90 percent? Is there a reasonable chance that
> faster modulation schemes will be able to fit onto the DSP without having
> to throw away all the old "True Digital" cards and buying new ones?
>
> -joe
>