Re: [hylafax-users] Hylafax + T38modem + VOIP Gateway

[Kimble Young <kimble@xxxxxxxxxxxxxxx>]

Using --old-asn doesn't make much of a difference.

Without it bringing up the right channel type (t38 not g711) seems to 
work a bit less often than with it.

I'm pretty sure I have a problem with the gateway not the t38modem as 
indicated by all the bad HDLC frames and ethereal's packet analyser even 
 saying the frames are bad.

The problem is I have no idea what's causing it and neither do the tech 
support people it seems as I have been waiting a long time for an 
answer. I would guess that it is a timing issue or just a very poor 
implementation of t38. I was hoping someone had gotten the same unit going.

Funnily enough the unit's instruction manual is identical to the 
Patton/Inalps VOIP gateways so if anyone has gotten one of them working 
I'd like to hear about it.

Regards,

Kimble Young

Steve Underwood wrote:
> Alexandre Aractingi wrote:
>
> > > Has anyone managed to get hylafax + T38modem + a gateway apart from 
> > > cisco working?
> > >   
> >
> > I got it to work with an Innovaphone gateway (IP3000)
> >
> >  
> >
> > > t38modem is - 0.8.0
> > > hylafax is either 4.2.0 or 4.1.8 (tried a few machines)
> > > t38modem is run with:  t38modem -F -n  --old-asn -p ttyx0,ttyx1 -P 
> > > T.38-UDP --route all@xxxxxxxxxxxx -o trace.log -ttt
> > >   
> >
> > Don't invoke '--old-asn', it's supposed to be a workaround for Cisco
> > gateways...
> > Good luck!
> >
> >  
> It is not just for Cisco. The ASN.1 in the original T.38 spec has an 
> error. Most things have been implemented to the erroneous spec, and only 
> a few recent things seem to work to the corrected version of the ASN.1. 
> Ethereal, for example, can work with both, but defaults to the erroneous 
> version as it is much more common.
>
> Regards,
> Steve
>
>
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