[comp.dcom.modems] V.32/bis implementation summary wanted

whitcomb@aurs01.uucp (Jonathan Whitcomb) (01/24/91)

I am looking for a summary of the various methods that commercial
manufacturers have used to implement pseudo-V.32 modems.  Specifically,
I want to know Trellis shortcuts, different constellation mappings,
unusual scrambler polynomials and full duplex techniques used to
avoid echo cancellation.  In a nutshell, what the manufacturers 
have done that would make thier modems non CCITT compatible.

Any idea of how popular any of these modems are (how many have sold, 
what countries they are used in) would be helpful.


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Jonathan Whitcomb                    UUCP: <...!mcnc!aurgate!whitcomb>
(919) 850-6231              "Uh-oh, uh-oh, there's panic in the world"
Raleigh, NC                                               -Bill Nelson