[wplug] RE: asterisk forum

[Bill Moran]

"Ryan R. Schuster" <ryan at myerstechservices.com> wrote:
>
> >While all this thought sounds quite nice and seems to prove the fax
> over 
> >SIP doesn't work, it falls down hard when you look at the glaring fact 
> >that vonage provides fax service...via SIP.  Perhaps they are using a 
> >different codec, but regardless, its is fax over SIP.
> 
> That's what we're trying to do... we have Vonage right now, our security
> system and Fax are running through it right now, and we're trying to get
> away from them.
> 
> >I stated in my first email response that there are a number of
> workarounds
> >possible (theoretically) but no standards that I'm aware of.  If Vonage
> >developed their own Fax-capable codec, it's not standard SIP at that
> point.
> 
> We don't nessecarily have to use SIP...  Workarounds are fun if we can
> find information on how to implement them.  We just don't want to have
> to pay for any more services than the SIP provider that we're already
> using, or on of comparable price/value...
> 
> >But Vonage isn't VoIP anyway.  It's just a VoIP gateway to the PSTN.
> 
> Which is what we're trying to set up.  We just don't want to use Vonage,
> we want more control over our service.

What you really need to do is contact your gateway provider, then.  Any
codec or workaround you would use would need to be something that they
could implement on their end as well, otherwise it would never work.

Again, in theory all you'd need is a lossless codec, or a lossy coded
that doesn't filter out the extreme frequencies the fax uses.

Another option (that we used when PT was in business and had its
own VoIP setup) was a single PSTN line with a TDM card.  Speaking of
that, we still own that TDM card and no longer use it.  Interested in
picking it up?

Anyway, the solution there was that the fax machine got routed through
the TDM card, and was never converted to VoIP as a result.

-Bill