[Asterisk-Users] Best codec for faxes?

[Julio Arruda]

Steve Underwood wrote:
> 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 ?