[Asterisk-Users] FAX over PRI

Fri May 19 12:25:18 MST 2006

HylaFax provides error correction while stand alone RxFax does not...

________________________________

From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Tom
Christensen
Sent: Friday, May 19, 2006 2:43 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [Asterisk-Users] FAX over PRI

If this works reliably while rxfax+spandsp does not, wouldn't this point
the blame at rxfax as opposed to spandsp?
IAXmodem uses spandsp the same way rxfax does right?

On 5/19/06, Alexander Lopez <Alex.Lopez at opsys.com> wrote:

I have the same problem, Switched to HylaFax and IAXModem and had MUCH
better luck. MUCH better being defined as not a single usable fax to
only missing about 1%. Not bad.

Spandsp or rather RXFax works on a few machines I hae quite well but on
others it does not work at all, I have had good retruns with the
HylaFax.IAXmodem combo on machines that could not use the RxFax. 

________________________________

From: asterisk-users-bounces at lists.digium.com [mailto:
asterisk-users-bounces at lists.digium.com
<mailto:asterisk-users-bounces at lists.digium.com> ] On Behalf Of Tom
Christensen
Sent: Friday, May 19, 2006 12:18 PM

To: Asterisk Users Mailing List - Non-Commercial Discussion

Subject: Re: [Asterisk-Users] FAX over PRI

I have had nothing but problems receiving faxes over PRIs with spandsp.
I currently have 4 systems, 4 PRIs from 4 different providers... none of
them get better than 50% success rates receiving faxes in spandsp, I
constantly get cut off pages.  No body seems to have a fix for it, and
it is really frustrating.  Supposedly it is caused by "frame slips" on
the PRI, but if that is the case, I am 4 for 4 getting crappy PRIs that
can't keep time. 

These same boxes work fine when receiving faxes over fxo ports, or if I
plug a fax machine into an fxs port and call in to a spandsp extension
the fax will be received just fine, so I am left thinking it must be the
PRIs, but if all PRIs are this bad, how can anybody be using them? 

Tom

On 5/19/06, Steve Hanselman <SteveH at brendata.co.uk> wrote:

Sorry for the late reply but both of these are fine, we use spandsp to
print some faxes and email others.

We also route via a PRI to our other phone system to hylafax on an
analog modem and also to an analog fax. 

So what you want to do is fine and will work.

Steve

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto: asterisk-users-bounces at lists.digium.com] On Behalf Of Michael
Gaudette
Sent: 21 March 2006 20:34
To: 'Asterisk Users Mailing List - Non-Commercial Discussion' 
Subject: RE: [Asterisk-Users] FAX over PRI

Hmmm, Im not so sure I can apply this to me though.  I just want to do
Fax-To-Email using PRI channels as the incoming lines.  Not so much
transfer
to a real fax. 

I am assuming that this is easily done with Asterisk? (I did it before
with
Asterisk SIP, but it only worked once every 10 tries or so)

Mike

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Andrew
Kohlsmith
Sent: March 21, 2006 3:25 PM 
To: asterisk-users at lists.digium.com
Subject: Re: [Asterisk-Users] FAX over PRI

On Tuesday 21 March 2006 15:09, Michael Gaudette wrote:
> How should I consider Fax over PRI channels with Asterisk?  Is the 
> quality and reliability good, or should I be prepared for alot of
grief?

I'm having good success doing fax over PRI using a TE405; one span to
the
PRI, the other to an FXS channel bank that is almost obscenely 
underutilized
(3 channels).

I also have channel bank - T100P - IAX2 - TE405 - PRI, where the IAX2
link
is a 1-hop SDSL (VOIP only) data link.  This works well too.

-A.
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