Re: [hylafax-users] general IAXmodem concepts

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

marthter wrote:

> I guess my main question is, can I run just IAXmodem (without 
> Asterisk) and let it be the client to my VOIP provider's IAX 
> compatible server?


You can, but the chances of that working reliably well for you are not 
in your favor.  Data will get lost in the jitter.

> Then I'll understand which of these scenarios are possible or impossible:
>
> 1. My HylaFAX server runs IAXmodem, IAXmodem talks to VOIP provider's 
> IAX compatible server to place fax calls to PSTN


It's possible, but again, it's not likely to work well.

> 2. My HylaFAX server talks to IAXmodem, which is running in my 
> Asterisk server (possibly on same box), Asterisk server talks to VOIP 
> provider's IAX compatible server to place fax calls to PSTN


Again, this is possible, but since the audio runs over a lossy/jittery 
channel it's not likely to work well.

> 3. My HylaFAX server talks to IAXmodem, which is running in my 
> Asterisk server (possible on same box), Asterisk server uses one of 
> its FXOs connected to one of my analog lines to place fax calls to PSTN


This is what should work very well.

> I understand the caveats about faxing over VOIP (at least in as much 
> as one can understand the caveats without understanding the above! ).


It sounds like you may understand them but apparently you don't believe 
them.

 http://hylafax.sourceforge.net/docs/fax-over-voip.pdf

Lee.


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