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[asterisk-users] New faxing protocol. Good/Bad ?

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tzafrir.cohen at xorco...
Guest

Posted: Sun Jun 01, 2008 6:11 pm Post subject: [asterisk-users] New faxing protocol. Good/Bad ?

On Mon, Jun 02, 2008 at 12:54:40AM +0300, Dovid B wrote:

Quote:

Hi List,
I was thinking the other day that even with T.38 there are still some issues with faxing. I was thinking of a protocol that instead of just sending down the fax tones an ATA or "VOIP fax machine" would get the entire fax convert it into some sort of image and pass it down the line to the receiving end. I got the idea from RFC2833. Yes I know that fax machines send bit by bit and get a conformation on it but maybe this would work a bit better. Send the entire "image" over and then get a response when it is done. This way if there is issues along the way the packets can be re-sent with out any issue.

T.37 (fax over email)?

--
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

steveu at coppice.org
Guest

Posted: Sun Jun 01, 2008 6:34 pm Post subject: [asterisk-users] New faxing protocol. Good/Bad ?

Dovid B wrote:

Quote:

Hi List,
I was thinking the other day that even with T.38 there are still some
issues with faxing. I was thinking of a protocol that instead of just
sending down the fax tones an ATA or "VOIP fax machine" would get the
entire fax convert it into some sort of image and pass it down the
line to the receiving end. I got the idea from RFC2833. Yes I know
that fax machines send bit by bit and get a conformation on it but
maybe this would work a bit better. Send the entire "image" over and
then get a response when it is done. This way if there is issues along
the way the packets can be re-sent with out any issue.

Dovid
(Cross posted to Biz for those that aren't on the users list - I want
their onion too Wink

First, go look at what T.38 actually does (you don't seem to understand
that). Then think about why it has been made so clumsy (there is a
reason). Then look at T.37, and see if that better suits your needs.

T.38 is a terrible woolly document, and someone should be spanked for
it. However, the basic scheme it implements exists for valid reasons.
The key reason being the specified timing and timeouts of the T.30
compliant FAX machines it needs to support.

Steve

asteriskusers at dovid...
Guest

Posted: Sun Jun 01, 2008 7:58 pm Post subject: [asterisk-users] New faxing protocol. Good/Bad ?

----- Original Message -----
From: "Tzafrir Cohen" <tzafrir.cohen at xorcom.com>
To: <asterisk-users at lists.digium.com>
Sent: Monday, June 02, 2008 2:11 AM
Subject: Re: [asterisk-users] New faxing protocol. Good/Bad ?

Quote:

On Mon, Jun 02, 2008 at 12:54:40AM +0300, Dovid B wrote:

Quote:

Hi List,
I was thinking the other day that even with T.38 there are still some
issues with faxing. I was thinking of a protocol that instead of just
sending down the fax tones an ATA or "VOIP fax machine" would get the
entire fax convert it into some sort of image and pass it down the line
to the receiving end. I got the idea from RFC2833. Yes I know that fax
machines send bit by bit and get a conformation on it but maybe this
would work a bit better. Send the entire "image" over and then get a
response when it is done. This way if there is issues along the way the
packets can be re-sent with out any issue.

T.37 (fax over email)?

--

Tzafrir,
Through of it but it requires a mail server. I was thinking of something
that would work from one fax machine to another. It was just an idea......

Dovid

stotaro at totarotechn...
Guest

Posted: Sun Jun 01, 2008 9:47 pm Post subject: [asterisk-users] New faxing protocol. Good/Bad ?

On Sun, Jun 1, 2008 at 8:58 PM, Dovid B <asteriskusers at dovid.net> wrote:

Quote:

On Mon, Jun 02, 2008 at 12:54:40AM +0300, Dovid B wrote:

Quote:

Hi List,
I was thinking the other day that even with T.38 there are still some
issues with faxing. I was thinking of a protocol that instead of just
sending down the fax tones an ATA or "VOIP fax machine" would get the
entire fax convert it into some sort of image and pass it down the line
to the receiving end. I got the idea from RFC2833. Yes I know that fax
machines send bit by bit and get a conformation on it but maybe this
would work a bit better. Send the entire "image" over and then get a
response when it is done. This way if there is issues along the way the
packets can be re-sent with out any issue.

T.37 (fax over email)?

--

Tzafrir,
Through of it but it requires a mail server. I was thinking of something
that would work from one fax machine to another. It was just an idea......

Dovid

http://mycelery.com/celery_email_machine_email_device_video.php

Maybe throw Callweaver in the mix.....?

Thanks,
Steve Totaro

stotaro at totarotechn...
Guest

Posted: Sun Jun 01, 2008 9:50 pm Post subject: [asterisk-users] New faxing protocol. Good/Bad ?

On Sun, Jun 1, 2008 at 10:47 PM, Steve Totaro
<stotaro at totarotechnologies.com> wrote:

Quote:

On Sun, Jun 1, 2008 at 8:58 PM, Dovid B <asteriskusers at dovid.net> wrote:

Quote:

On Mon, Jun 02, 2008 at 12:54:40AM +0300, Dovid B wrote:

Quote:

Hi List,
I was thinking the other day that even with T.38 there are still some
issues with faxing. I was thinking of a protocol that instead of just
sending down the fax tones an ATA or "VOIP fax machine" would get the
entire fax convert it into some sort of image and pass it down the line
to the receiving end. I got the idea from RFC2833. Yes I know that fax
machines send bit by bit and get a conformation on it but maybe this
would work a bit better. Send the entire "image" over and then get a
response when it is done. This way if there is issues along the way the
packets can be re-sent with out any issue.

T.37 (fax over email)?

--

Tzafrir,
Through of it but it requires a mail server. I was thinking of something
that would work from one fax machine to another. It was just an idea......

Dovid

http://mycelery.com/celery_email_machine_email_device_video.php

Maybe throw Callweaver in the mix.....?

Thanks,
Steve Totaro

Ah, looks like T37. You know, not everything needs to be VoIP or in Asterisk?

Thanks,
Steve Totaro

benny+usenet at amorse...
Guest

Posted: Mon Jun 02, 2008 7:28 am Post subject: [asterisk-users] New faxing protocol. Good/Bad ?

Steve Underwood <steveu at coppice.org> writes:

Quote:

Then look at T.37, and see if that better suits your needs.

T.37 is a really nice protocol, and it's supported by many devices.
However, none of them keep the simplicity of normal faxing when doing
T.37 -- I haven't found a fax which can be configured to do T.37 for
ALL outgoing faxes while keeping the normal "user interface" that
people expect.
/Benny

steveu at coppice.org
Guest

Posted: Tue Jun 03, 2008 9:03 am Post subject: [asterisk-users] New faxing protocol. Good/Bad ?

Benny Amorsen wrote:

Quote:

Steve Underwood <steveu at coppice.org> writes:

Quote:

Then look at T.37, and see if that better suits your needs.

I agree that T.37 is a sane was to FAX in the 21st century. However, I
wouldn't say it was widely supported. Even most things that do FAX-email
integration don't follow T.37 properly. The only mass market FAX
machines I know where T.37 comes as standard are the Brother
multi-function machines. I think T.37 is sadly under supported.

Steve

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