Re: [hylafax-users] Faxing over VOIP?

["Jamin W. Collins" <jcollins@xxxxxxxxxxxxxxxx>]

Rob Rothberg wrote:
> Am I missing something here?  One has zero control of the jitter 
> involved over the VoIP connection between the ISP that Asterisk is 
> sitting on and POTS. 

You can use iaxmodem, Asterisk, and Hylafax without needing an ISP. 
This does not mean that you have to have physical TDM lines coming into 
the Asterisk system nor does it preclude it.  For instance take the 
following scenarios:

1) TDM line from the Central Office terminates on a TDM to SIP 
conversion device.  SIP communication travels over a local private 
network to the Asterisk box.  Asterisk then delivers the call to an 
iaxmodem client on yet another box, controlled by Hylafax, over the 
local private network.

2) TDM line from the Central Office terminates into an Asterisk box. 
Asterisk then delivers the call to an iaxmodem client running locally 
controlled by Hylafax.

Neither of these scenarios involve a VoIP connection between the ISP and 
Asterisk.  Even if they did, as long as that connection supported T.38 
end to end, the inside leg could still be constructed as illustrated above.

--
Jamin W. Collins

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