[asterisk-users] FAX Issues

Tue Aug 9 17:35:38 CDT 2011

Ok,

Thanks

But what is the NVFAX? Does 1.4 support getting faxes per extension?

In my office I have 1000 ext, each users has it's own DID number.
What I would like is that each user can get a fax using his own number.

I'm running version 1.4.29 under Debian,  and FreePBX under a sip trunk.
It working great, no issues.
But I can't get FAXs since the NVFAX option is gray out.

I do not have a app_fax.so under the modules, and google it I saw you will
need to patch the code of asterisk using the spandsp tool.

There is also a stand alone version of this, where no patching is needed,
but I still want to know what FAX options is supported under version 1.4.

In 1.6 the app_fax.so comes by default, but I need to upgrade the server,
which might be good idea, but I'm not sure I want to get into this now.

Version 1.8 seems to have digum support and spandsp support for faxes, but
I'm not sure what does it mean....

All I want is that each user has his own fax number, so when no answering,
and voice mail is off (can I keep it on?), once fax is coming in, it will be
converted to pdf and sent to the user mailbox.

For sending faxes, I guess I can used sendmail with IAXmodem and some faxing
server.....

Thank you all
Sassy

On Wed, Aug 10, 2011 at 1:15 AM, Ryan McGuire <rdmcguire01 at gmail.com> wrote:

> Unless your network is under load and you are seeing dropped packets
> and high jitter, I would absolutely not do T.38. The cheapest and
> easiest approach that I have found is to buy yourself an FXS gateway
> and just make sure you are using ulaw.
>
> Is this for personal use, or for business use? One feature that you
> may want to utilize is fax tone detection if you only have a single
> incoming line. If you use fax tone detection you can send the call
> directly to your FXS gateway.
>
> I've successfully faxed through my SIP provider as well as through an
> FXO gateway going to a DOCSIS modem (consumer grade "digital voice").
> TDM and POTS are really synonymous by the way, TDM is just a more
> specific acronym (time-division multiplexing). You need not worry
> about the details though, if you are simply doing inband passthrough
> and you are using 711u on your VOIP legs you should be fine... YMMV of
> course.
>
> -Ryan
>
> On Tue, Aug 9, 2011 at 6:00 PM, Steve Totaro
> <stotaro at totarotechnologies.com> wrote:
> > On Tue, Aug 9, 2011 at 5:21 PM, C F <shmaltz at gmail.com> wrote:
> >> On Tue, Aug 9, 2011 at 3:38 PM, Sassy Natan <sassyn at gmail.com> wrote:
> >>> Hi,
> >>> I would like to make sure I got it right:
> >>> 1. Asterisk 1.4 doesn't support FAX support. It do however works if u
> sent
> >>> fax from the PSTN and have anther FAX machine answer to it even if it
> is
> >>> behind asterisk. This works like any regular phone, and as far as I
> know
> >>> this mode known as T.38 pass through.
> >>
> >> No its not T.38 pass through. T.38 pass through is only if the 2 end
> >> points negotiated T.38, i.e. a provider that supports T.38 and an ATA
> >> that supports T.38. What you are describing will most likely fail if
> >> there is any VoIP in between, and should succeed over pure TDM using
> >> digium or similar cards.
> >
> > Fax was never officially supported by Asterisk/Digium using TDM cards.
> >
> > I works for the most part, but there is no comparison to a pure POTS
> > line.  Much depends on the line quality, the sending and receiving fax
> > devices.  Some places with good fax machines, PRIs coming in and some
> > FXS ports would work just fine.
> >
> > Others, are a nightmare and make you look bad.
> >
> > Depending on your customer's fax needs, sometimes it is better to tell
> > them to keep or have some POTS lines provisioned for reliable faxing
> > and to back that up, bring up being able to reach 911 if the phone
> > system is down and the company's liability, even though everyone has
> > cell phones.  This is the best for TDM faxing with nothing fancy.
> >
> > I have sent people to www.trustfax.com
> >
> > TDM faxing is something that burned me more than once, so I don't suggest
> it.
> >
> >>
> >>> 2. If u want asterisk 1.4 to able to sent and receive emails you will
> have
> >>> to patch the source code using the spandsp patches. There are some
> other
> >>> ways to make this work like using  IAX, hylafax  but I need to know if
> this
> >>> is true. This mode is what know to be as NVFAX detected
> >>
> >> asterisk doesn't have the ability to send or receive emails. It does
> >> have the ability to use something like sendmail to send/receive
> >> emails.
> >> I'm assuming its a typo and you meant faxes.
> >> What exactly are you trying to accomplish? If you need to know
> >> something go ahead and try/test it and report back. After all that is
> >> what we all did to be able to answer it. Apparently the fact that
> >> others tried it and told you that it works still warrants a
> >> question:"I need to know if this is true"
> >>
> >
> > I have been advised that everyone must post their solutions to the
> > list so that you don't have to test.  I think it was a self appointed
> > list moderator.  People are required to come back, aknowledge that
> > something worked and give credit.  Flaw: Just because something worked
> > for someone doesn't mean that your solution wouldn't work better.
> >
> > Anyways, I am with you.  I learned this stuff with very little
> > documentation except .conf examples and code.  Integration is where
> > things get really fun and creative.  Logically testing and failing and
> > testing until you find your solution is extremely rewarding (at least
> > to me).  Making a Definity G3 and Asterisk fully integrate can cause
> > severe rage followed by euphoria, so be warned.  Being creative is
> > dangerous to some on the list.
> >
> > Try iaxmodem and hylafax.  Alex B did a very nice writeup on how to
> > set that up so that it works very well.
> >
> >>
> >>> 3. Now version 1.6 support Fax in a better way then 1.4. There is
> app_fax.c
> >>> in the source code. Can someone please tell me what does this apps do?
> >>
> >> I assume you meant than not then, but I'm not sure if its a typo, you
> >> might just not know.
> >> app_fax.c does faxing. The question is what are YOU trying to do?
> >>
> >>
> >>> 4. Version 1.8 as two modes: SpanDSP mode and some other method, what
> is
> >>> the different between then.... can someone please help?
> >>
> >> Whats the other mode?
> >>
> >
> > The best mode for T38 is probably Freeswitch or Callweaver.
> >
> >>
> >>>
> >>> Thanks
> >>> Sassy
> >>> --
> >
> > --
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