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Re: [hylafax-users] Iternet-Fax WG Anyone?



On 2004.08.03 21:01 Bill Binko wrote:

The standard that the copier we're using employs to send "internet
faxes"
is officially ITU-T T.37.  T.37 is a "store-and-forward" form of
internet
faxing: basically, it routes fax images over SMTP.

The T.37 is based on the "Internet Fax" or "IFax" standard defined by
the
ietf as RFCs 2301-2305 (with updated RFCs available at
http://www.imc.org/ietf-fax).

Just so that everyone is clear on this, there is also another "internet fax" standard defined by T.38 which is not a "store-and-forward" form. T.37 and T.38 are quite different.


I looked through the archives and found little to go on, except for a
brief thread in May 2001 where Lee concluded that Hylafax's faxmail
and
T.37 were: "Not close at all.  Feel like coding it?"

I don't recall ever studying T.37. I have studied T.38, and I suspect that my comments were related to T.38 vs. faxmail.


One of the biggest problems we see on this board is how to get paper
documents through the server.  People still need to sign things: it's
at
least one thing that people still use paper faxes for.  At my client,
we're trying desparately to get people to give up the fax machines on
their desks: they're expensive to operate, we have no record of the
sent
and recieved faxes, they use dedicated phone lines, and we pay long
distance -- all-in-all: they stink!

Have you considered my recently posted ideas about using fax machines as networked HylaFAX client devices (in part by using PBX software such as Asterisk)? You'd get all of the benefits of HylaFAX with all of the ease-of-use of the fax machine.


I wanted to get the same benefits for their outbound paper faxes, so I
planned on writing another script that let him "scan to email to fax"
using faxmail.  Then I noticed the T.37 feature on the machine and
realized that this was worth looking into.

It is worth looking into.


Many of the devices we looked at included T.37 support: Ricoh,
Panasonic,

I have read through a couple of Panasonic Panafax manuals that had fax-to-email capabilities, and I don't remember any comments about T.37.


Brother, Gestetner, Sharp, Xerox, Mita, Oki, and many other
manufacturers
make them (froogle is your friend).  Most of them are not, but if
you're
leasing a copier anyway, adding T.37 support is usually included in
the
"Scanning Option".

The problem is there's no open-source T.37 gateway that I could find!

Yes there is: procmail (or even shell, for that matter).


Personally, I think it would be fairly simple to modify faxmail to
accept T.37 addresses.  They are basically of the form
"FAX=+12223334444@xxxxxxxxxxxxxxxxxxxxx".

Extending faxmail wouldn't be difficult, but you would have to get it to handle TIFF attachments or whatever attachment type T.37 uses. By the same token, it probably would take far less time in developing a procmail solution. I must have written a dozen different faxmail replacements using procmail and/or shell, and I suspect that I've spent less time in total than it would have taken me to enhance faxmail to my liking.


If there's interest in the community, please let me know

There's interest, don't worry. Once you let people know on-list of this "neat, newfangled way" of getting the routine stuff done in a better fashion, then people will perk up. Sometimes you have to show people how good it can be before they realize that they're missing something.


Lee.

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