Re: [hylafax-users] [hylafax-devel] Fax over VoDSL PSTN emulators

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Luke McKee wrote:

> It's running AAL2 (Bundled Voice over ATM PVC - CBR in this case) but
> the device, at least from how I'm much interpreting so far doesn't
> clearly confirm the codecs. The best case scenario is G.711 and GOOD
> QoS.


If this "Voice over DSL" isn't essentially VoIP in a different 
packaging, then how is QoS even a factor?

On the PSTN once the CO gets the audio and digitizes it there is a 
virtual guarantee that it will reach the other end with the same timing 
and the same order as the original form.  If that guarantee does not 
exist on whatever network with which a fax user replaces the PSTN, then 
the reliability of that network for fax use will vary accordingly.

Whatever the medum carrying the audio is, if it is at all possible for 
the audio to become corrupted when riding that medium, then the 
usability of that medium for traditional fax (or data) will depend on 
that possibility.

Lee.


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