Re: [hylafax-users] DTMF

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Davie Lynn wrote:
> Is there a list I can consult to see which modems support DMTF for 
> routing received faxes with Hylafax+?

Any modem that reports AT+FCLASS=8 support *should* also support 
SHIELDED_DTMF.  Furthermore, there are a number of other modems (like 
some USR modems) that support SHIELDED_DTMF in AT#CLS=8.  And 
furthermore, there are are certain modems (such as the Multitech MT1932 
and MT2834) that support DTMF reception (but not SHEILDED_DTMF) with 
special commands (usually AT>DT1).

So it would be rather difficult to make a list... unless someone 
maintains one from gathering info from this mailing list (and even then 
it would get outdated rather quickly as modem models change).

> If not, can anybody recommend some internal / external modems I can 
> buy cheaply that will provide DTMF and works well with Hylafax+?

As far as I am aware, all Mainpine and Multitech modems will support 
DTMF in one form or another.  I also believe that all USR modems will 
support DTMF ... however I advise against using USR modems for fax (as 
they don't support AT+FRS/+FTS and have been known to be buggy in the 
past).  I suspect that all modern Rockwell/Conexant-chipsetted modems 
will support DTMF in one of the forms described above, but I don't 
recall if I have had any specific experience with them in that.  (I 
suspect that I did test them when I developed the SHIELDED_DTMF feature, 
but I don't recall for sure.)

Thanks,

Lee.


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