Re: [hylafax-users] How do you deal with DRON/DROF?

[George Bell <gbell5@xxxxxxx>]

On Tuesday 18 May 2004 16:09, James Pifer wrote:
> On Tue, 2004-05-18 at 15:42, George Bell wrote:
> > On Tuesday 18 May 2004 14:12, James Pifer wrote:
> > > I have hylafax installed using a Conexant modem and the driver from
> > > Linuxant. I have distinctive ring enabled on the modem and get the ugly
> > > DRON/DROF messages instead of RING1, RING2 or the like.
> > >
> > > I've searched and people say to use these. When the distinctive ring
> > > number is called it seems like there's always at least one DRON=3. So
> > > in the config.ttySFSH0 I tried setting:
> > > RingFax:	"DRON=3"
> > > I also tried it without the quotes.
> > >
> > > Unfortunately it's picking up not only the distinction ring number, but
> > > the regular number as well.
> >
> > Does this happen randomly or all the time?  The problem with just setting
> > one of the distinctive ring lines to "RingFax" or "RingData" is that the
> > numbers tend to jump around a bit, averaging out at a nominal value of
> > "3" or whatever.  A proper implementation of distinctive ring call
> > discrimination has to take this into account, as well as the other
> > patterns in the distinctive ring which make up the distinctive ring
> > pattern.   This  requires that the "RING" line not be sent to the DTE
> > until the pattern is complete. This is accomplished through a judicious
> > choice of parameters for your particular distinctive ring patterns in the
> > At command "VDR=x,y" .
>
> It seems to be inconsistent. In grabbing the logs for this reply it
> worked correctly a couple times and incorrectly a couple times. I used
> 1,0 for VDR, but honestly I don't know what combination I should be
> using. See logs below.
>
The first parameter simply enables distinctive ring while the second 
determines the delay, in 1/10 sec, that the modem sends "RING" to the DTE 
following the falling edge of any distinctive ring pulse.  The strategy is to 
make the delay longer than any off periods so it doesn't get reported before 
the pattern is finished(and accounting for noise variations), while not 
delaying reporting the RING for too long(i.e. by the next ring).   If this 
sounds confusing then don't worry - I'll be explaining this in a mini howto 
to be released with the patch.

> > > Any suggestions? How are people handling distinctive ring with these
> > > DRON/DROF messages? Also, if I set RingFax do I also need to specify
> > > RingVoice=?
> >
> > So funny you should ask this at this moment.
> > I'm releasing a patch for hylafax to handle distinctive ring soon,
> > probably tomorrow.
>
> Look forward to the release. How exactly can I find out when it is
> released? Do I need to be on an announce list?
>
It will be released on http://wiki.ifax.com/tiki-index.php, and announced on 
this list, probably tomorrow.


> James
>
> > George
>
> Here's the log. One for the voice number, one for distinctive ring.
> Unfortunately they look exactly the same:

If the call is always taken as fax then of course, it's not working :) 
With the patch and other materials to be distributed on the wiki one should be 
able to handle any of voice, data, and fax calls with distinctive ring equally 
well.

George


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