[Asterisk-Users] Best codec for faxes?

Steve Underwood steveu at coppice.org
Wed Nov 3 07:34:37 MST 2004


steve szmidt wrote:

>On Tuesday 02 November 2004 08:18 pm, Julio Arruda wrote:
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>>Steve Underwood wrote:
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>>'replace' fax over G.711 by fax over G.711 over IP :-)
>>The point being, Fax over VOIP (even using G.711), I don't believe would
>>be as reliable as Fax over an ISDN b-channel :-) Better now ?
>>    
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>
>You're totally right. The advantage of ISDN is lost, from a fax viewpoint, 
>largly because the unwieldly Internet don't care about lagging packets etc.
>
>Point to point ISDN is a great dedicated circuit. But it ain't that no more 
>once you connect it to the Internet. 
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>
Yes and no. Across the Internet even a G.711 FAX is unpredictable. 
However, people often get perfectly good results on lightly loaded LANs. 
It still isn't perfect, as a urst of data on the LAN can still upset 
things, but some people get results they can live with.

Steve




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