Julio Arruda wrote:
Roger Schreiter wrote:
Matthew Boehm schrieb:
I'm not using asterisk as the "fax machine" a la rxfax and the like. I'm
using an ATA (linksys, grandstream, etc) plugged into a fax machine. I know
not to use 729 for faxing. Which 'should' I use?
...
Hi,
use G.711, and you'll have ISDN quality! Tradidional analog adaptors for ISDN do the same, and (analog) faxing over ISDN is working fine, isn't it?
I would expect FAX over ISDN to work better than fax over G.711 on some networks.
ISDN doesn't have the jitter/packet loss of IP networks (unless you control the whole path or has some nice SLA :-)). The price being, is a circuit switched technology.
Clue: G.711 is the codec used over ISDN :-)
Ok, now I understand why you mentioned that common codec, let me clarify my remark (I can blame on english not being my native language I guess :-)..,
'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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