[Asterisk-Users] FAX over PRI

Sat May 20 06:55:29 MST 2006

Personally, I have to agree with Alexander on this...
The single PRI card is $6k, I might as well get online and buy a used cisco
as5300/5400, I can get those for $5-7k on ebay usually, they have DSPs, and
take all the load off the server itself, and I'd have the added benefit of
the thing being expandable, if someone suddenly needed 4 PRIs, just add a
line card.. yeah they're expensive, but cheaper than dropping $6k per PRI...
Of course, then I wouldn't be able to suggest asterisk to any small
businesses, because I just priced myself out of the market... but whatever.

On 5/20/06, Armin Schindler <armin at melware.de> wrote:
>
> On Fri, 19 May 2006, Alexander Lopez wrote:
> > For me the answer is simple:
> >
> > 1     Not open source, IT is a thrill to be able to say what you did
> > without Closed SW.
>
> The drivers are GPL'ed open source. If your are referring to the firmware,
> then yes, it is closed, but why would you need that open? With the
> provided
> interface, you can do a lot of things...
>
> > 2     Expensive
> >
> >       Eicon Diva Server Analog- 4 Port Price: $1,695.00
> >       Most customers won't need that level of Fax anyway, it is
> > usually a freebee tossed in as "Splenda" (ie Artificial Sweetener)
>
> Sure, but when a professional reliable server with good features is
> needed,
> you might be cheaper in the end when you don't need to work around the
> problems you get with the cheaper cards.
>
> > 3     Not that big of a deal, most people would have an investment in
> > a fax machine anyway.
>
> Possibly, but again, I didn't refer to that 'small' solutions.
>
> Armin
>
> > Just my .10 (Had to increase 5 fold to pay for gas for SUV)
> >
> >
> > > -----Original Message-----
> > > From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> > > bounces at lists.digium.com] On Behalf Of Armin Schindler
> > > Sent: Friday, May 19, 2006 12:54 PM
> > > To: Asterisk Users Mailing List - Non-Commercial Discussion
> > > Subject: RE: [Asterisk-Users] FAX over PRI
> > >
> > > On Fri, 19 May 2006, Alexander Lopez 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.
> > >
> > > Just out of curiousity, if the faxing is not that reliable with
> > softfax
> > > solutions, why not using hardware DSPs?
> > > E.g. the DIVA Server PRI card (with DSPs for some or all channels)
> > does
> > > provide faxing without using the CPU (same like the DIVA Server BRI
> > > cards).
> > >
> > > Armin
> > >
> > >
> > > > 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] 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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