mgetty voice/fax/data

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Hi,

Paul Miller wrote:
> > > > > Does mgetty support silent answer? And how can I 
> > > > > send the +FAA=4 command to my modem instead of +FAA=1?
> > > > No way.
> > > Not even if I have an answer-chat command? 
> > No, because answer-chat is only called when the phone already RINGs, and
> > that's precisely what you don't want to happen with +FAA=4.
> 
> What if I edit the code and recompile? 

With code changes and recompilation, you can do anything :) -- but with
"legal" ways, there is no clean way yet.

> I don't know how the modem tells
> the software that the connection is data .. if it outputed "DATA" or
> something, I think mgetty could be configured to wait for that ... it does
> for "FAX" (I think)

Just try what happens. Then tell us about it, so maybe it's worthwile to
add support for it...

> > > Is there a work around? 
> > You could put mgetty to "data-only" mode, and add all the fax
> > initialization to "init-chat".
> Will mgetty automatically handle fax if the modem outputs "FAX"?

I think so.

> > > How do voice/data/fax modems work? 
> > They don't (at least not reliably).
> 
> with mgetty or in general? It seems that Silent Answer Plus is probably
> fairly reliable because it checks for a certain tone - data callers need
> to send "ATDT^#######" when dialing.. the hat makes the special tone.

That's the problem -- you need a special tone. If a normal modem calls
(an older one), that is not sending anything, the modem doesn't know
whether it's voice or data. So if you send a voice welcome message, you
make modem connections fail -- and if you send modem tones, you annoy
human callers...

> > > > > Also, how do I tell mgetty to use caller id and look at
> > > > > the dialin.config file?
> > > > 
> > > > Should be done automatically. Just at "AT#CID=1 OK" to the end of your
> > > > modem init sequence ("init-chat" in mgetty.config).
> > > 
> > > hm.. If I tell mgetty to deny all numbers expect for a couple of know fax
> > > numbers, it still always answers the phone. I don't think it is being
> > > read.
> > 
> > Logfile? Without logfile, it's impossible to give any comment...
> 
> Does it say 'reading dialin.config'? I tried using just "!all" in the
> dialin.config file to ignore every call, but it still picked up the phone.
> (I do have the ring count setup right, ATS0=0)

Damn, why don't you just show us the log file (-x9)? Don't let me pull
every single bit of data from your nose!

Most likely, there is something wrong with the caller ID code (some new,
yet-unimplemented format, some bug in the code that I can't test because I
neither have a Supra modem nor Caller ID, ...), or whatever. But I can't
say if I don't see the log file!

gert

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Gert Doering - Munich, Germany      gert@greenie.muc.de
fax: +49-89-35655025    gert.doering@physik.tu-muenchen.de
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