[asterisk-users] Fax on FXS

[Steve Totaro]

Find (voice) Replace (Analog) for starters.

Bottom line, without writing a book, is that fax and modem (analog)
converted to IP (and back) at some point will be altered.  There are a
multitude of reasons that the audio is altered and to what degree is
going to determine your success or failure.

"FaxOverVoiceOverIPOverInternet has neither low latency nor low
jitter" is not a provable fact.  I have very low latency or "jitter"
to many destinations.  It depends how many hops and how much traffic.
A routetrace and ping can help you in those regards.

Thanks,
Steve Totaro


On Tue, Jun 10, 2008 at 12:15 PM, Eric ManxPower Wieling
<eric at fnords.org> wrote:
> IP can be run over many things.  Internet, Local LAN, Corporate WAN,
> VPN, etc  Each of these things have different characteristics and so I
> add them to the list.  FaxOverVoiceOverIPOverLAN is something that has a
> good chance of working, as a LAN tends to have little latency and little
> jitter, where FaxOverVoiceOverIPOverInternet has neither low latency nor
> low jitter.  How would suggest I indicate "global internet" instead of
> "IP on a local lan"?
>
> Matt Watson wrote:
>> Ah, you got me there!  Could start throwing in a lot of "Over"'s going down that road :)
>>
>> --
>> Matt
>> http://www.mattgwatson.ca
>>
>> -----Original Message-----
>> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Tzafrir Cohen
>> Sent: Tuesday, June 10, 2008 4:10 AM
>> To: asterisk-users at lists.digium.com
>> Subject: Re: [asterisk-users] Fax on FXS
>>
>> On Mon, Jun 09, 2008 at 06:53:34PM -0400, Matt Watson wrote:
>>> On June 9, 2008 01:34:31 pm Eric "ManxPower" Wieling wrote:
>>>> You should not expect FaxOverVoiceOverIPOverInternet to work well.  If
>>>> you stick to ulaw codec for the entire call, it might work well enough
>>>> for your use, but it might not.
>>> Just as an FYI - you have too many "Over"'s in your description....
>>>
>>> FaxOverVoiceOverIP would make sense, but seeing as how "IP" is short
>>> for "Internet Protocol", saying "Internet Protocol Over Internet" doesn;t
>>> make much sense...
>>
>> Unless you use an openvpn  / ipsec tunnel :-)
>>
>> --
>>                Tzafrir Cohen
>> icq#16849755              jabber:tzafrir.cohen at xorcom.com
>> +972-50-7952406           mailto:tzafrir.cohen at xorcom.com
>> http://www.xorcom.com  iax:guest at local.xorcom.com/tzafrir
>>
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>
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