[comp.dcom.modems] Undocumented registers in USR Dualstandard

hikaru@infodn.rmi.de (Walter Doerr) (10/20/90)

Has anyone out there compiled a list of undocumented registers/features
in the USR Dualstandard modems?

For example, I found that setting register 27 to 1 not only enables V.21
operation (as the manual states) but also disables V.32 operation which
is not mentioned in the manual.

Thanks.

-Walter

schuster@cup.portal.com (Michael Alan Schuster) (10/21/90)

>Has anyone out there compiled a list of undocumented registers/features
>in the USR Dualstandard modems?
>
>For example, I found that setting register 27 to 1 not only enables V.21
>operation (as the manual states) but also disables V.32 operation which
>is not mentioned in the manual.
>


All of these are documented in the manual supplement that went out with
the V.42 upgrade; they should be packed into the new modems too.

Barring that; try ATS$; the help screen displays the above options and more
new ones.

For a thrill, try ATUSR.