Ok,
I have to agree here. IF my simple fax server log/tiff archive is
not enough to satisfy a client that the fax is genuine I would not want
them as my customer. I don't care how much money they spend. Business
is business and what I do is what I do. There has to be at least a
little bit of
2006/5/5, Steve Underwood [EMAIL PROTECTED]:
In most cases, forensic analysis of the audio from another machine would
easily show it was a fake. It would lack tell-tale fingerprints of the
true path, unless it was done with extreme care. Certainly using exactly
the same model of FAX machine that
Alejandro Vargas wrote:
2006/5/5, Steve Underwood [EMAIL PROTECTED]:
In most cases, forensic analysis of the audio from another machine would
easily show it was a fake. It would lack tell-tale fingerprints of the
true path, unless it was done with extreme care. Certainly using exactly
the
asterisk-users@lists.digium.com
Sent: Wednesday, May 03, 2006 11:02 PM
Subject: RE: [Asterisk-Users] Can I recreate a Fax from a recorded file?
Maybe if you had the un-muxed sending side but I really have no idea.
Interesting question though.
-Original Message-
From: Alexander Lopez
2006/5/4, Craig Guy [EMAIL PROTECTED]:
If you have both sides of the call it is possible.It may not be practicalthough.If one side was using spandsp then it is both possible andpractical.CraigCould you elaborate ?
And if a fax is recorded with Asterisk voicemail application (in case an error in
snip
This is a very KGB / NSA / InterPOL / CIA type
question, but if I have a
recorded file (G.711, no compression) can I feed it
into standard in of
an application and have it recreate the fax that was
send?
/snip
What is the specific reason as to why you want to
record it to a file and
Bender
Sent: Thursday, May 04, 2006 9:06 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] Can I recreate a Fax from a recorded
file?
snip
This is a very KGB / NSA / InterPOL / CIA type
question, but if I have a
recorded file (G.711
List - Non-Commercial Discussion
Subject: RE: [Asterisk-Users] Can I recreate a Fax from a recorded file?
I have a client that 'NEEDS' (his words not mine) to make sure that all
faxes, emails, calls, and mail are archived. Phone and email are simple,
Mail depends upon the integrity of the mail room
Why not capture the faxes (in or out) in tiff format, instead of audio
format? Setup your asterisk box to relay faxes!
I think in this case the impact on the client would be much greater if you
can show them a recreation of the image from the raw data; you could always
claim that a TIFF file was
Colin Anderson wrote:
Why not capture the faxes (in or out) in tiff format, instead of audio
format? Setup your asterisk box to relay faxes!
I think in this case the impact on the client would be much greater if you
can show them a recreation of the image from the raw data; you could
I would have no problem decoding a FAX, doctoring the images, then
creating modified audio from them. During decoding, the FAX modems
produce a channel estimate, so reproducing the characteristics of the
original audio path wouldn't be hard. I think it would be pretty easy to
create fresh
On Thursday 04 May 2006 14:08, Steve Underwood wrote:
I would have no problem decoding a FAX, doctoring the images, then
creating modified audio from them. During decoding, the FAX modems
produce a channel estimate, so reproducing the characteristics of the
original audio path wouldn't be
Colin Anderson [EMAIL PROTECTED] writes:
Why not capture the faxes (in or out) in tiff format, instead of audio
format? Setup your asterisk box to relay faxes!
I think in this case the impact on the client would be much greater if you
can show them a recreation of the image from the raw data;
Why is this hard to fake at all? You send a different fax to your
system, and replace the Asterisk audio file with the one from the
altered fax. Additionally, the client has no realistic way of
verifying the correctness of your audio-to-fax translation tool; it
could just as easily output a TIFF
Mailing List - Non-Commercial Discussion'
Subject: RE: [Asterisk-Users] Can I recreate a Fax from a recorded file?
Why is this hard to fake at all? You send a different fax to your
system, and replace the Asterisk audio file with the one from the
altered fax. Additionally, the client has
Colin Anderson [EMAIL PROTECTED] writes:
Why is this hard to fake at all? You send a different fax to your
system, and replace the Asterisk audio file with the one from the
altered fax. Additionally, the client has no realistic way of
verifying the correctness of your audio-to-fax translation
Scott Gifford wrote:
Colin Anderson [EMAIL PROTECTED] writes:
Why not capture the faxes (in or out) in tiff format, instead of audio
format? Setup your asterisk box to relay faxes!
I think in this case the impact on the client would be much greater if you
can show them a
This is a very KGB / NSA / InterPOL / CIA type question, but
if I have a recorded file (G.711, no compression) can I feed it into standard
in of an application and have it recreate the fax that was send?
I dont know enough about the Fax handshaking to
understand this.
. I assume you have a lot of time on your hands :)
MD
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Alexander
LopezSent: Wednesday, May 03, 2006 9:33 AMTo: Asterisk
Users Mailing List - Non-Commercial DiscussionSubject:
[Asterisk-Users] Can I recreate a Fax from a recorded
Cc:
Subject: [Asterisk-Users] Can I recreate a Fax from a recorded file?
This is a very KGB / NSA / InterPOL / CIA type question, but if I have
a recorded file (G.711, no compression) can I feed it into standard in of an
application and have
Alexander Lopez wrote:
This is a very KGB / NSA / InterPOL / CIA type question, but if I have
a recorded file (G.711, no compression) can I feed it into standard in
of an application and have it recreate the fax that was send?
I don’t know enough about the Fax handshaking to understand this.
PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Technical
SupportSent: Wednesday, May 03, 2006 9:57 AMTo:
'Asterisk Users Mailing List - Non-Commercial Discussion'Subject:
RE: [Asterisk-Users] Can I recreate a Fax from a recorded
file?
Interesting question! If you have the audio
You da' Man!!!
I'll try this.
In spandsp there is a program in the tests directory called
fax_decode.
It isn't very sophisticated, as it is intended for my test
work, rather than general decoding. It is able to decode some
FAX audio from a wave file, though.
There are some expensive
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