I have a setup like yours as well, IE, I have a fax machine connected into the FXS port, and I can fax and receive faxes to the actual machine 100%<br>it is just receiving faxes in spandsp that exhibits this problem. I don't want to blame spandsp though, because if I send a fax directly from that fax machine to a spandsp extension (from fxs port into asterisk, not traversing the PRI) I get 100% success rates in spandsp. Also, with these machines plugged directly into an FXO analog line, I get 100% success rates in spandsp, it is only over PRIs that I see this problem.
<br><br><br><div><span class="gmail_quote">On 5/19/06, <b class="gmail_sendername">Noah Miller</b> <<a href="mailto:noahisaacmiller@gmail.com">noahisaacmiller@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi Tom -<br><br>> I have had nothing but problems receiving faxes over PRIs with spandsp. I<br>> currently have 4 systems, 4 PRIs from 4 different providers... none of them<br>> get better than 50% success rates receiving faxes in spandsp, I constantly
<br>> get cut off pages. No body seems to have a fix for it, and it is really<br>> frustrating. Supposedly it is caused by "frame slips" on the PRI, but if<br>> that is the case, I am 4 for 4 getting crappy PRIs that can't keep time.
<br><br>Just an aside thought (sorry to hijack the thread, Steve):<br><br>50% - Ouch. I only have one PRI at one of our offices, but we use it<br>to receive faxes that are directly sent via Digium FXS to an analog<br>fax machine. I've never formally tallied up the transmission errors,
<br>but we get something close to 100%. Maybe spandsp is an issue here.<br><br>- Noah<br><br><br><br>On 5/19/06, Tom Christensen <<a href="mailto:tomsmaillists@gmail.com">tomsmaillists@gmail.com</a>> wrote:<br>> I have had nothing but problems receiving faxes over PRIs with spandsp. I
<br>> currently have 4 systems, 4 PRIs from 4 different providers... none of them<br>> get better than 50% success rates receiving faxes in spandsp, I constantly<br>> get cut off pages. No body seems to have a fix for it, and it is really
<br>> frustrating. Supposedly it is caused by "frame slips" on the PRI, but if<br>> that is the case, I am 4 for 4 getting crappy PRIs that can't keep time.<br>><br>> These same boxes work fine when receiving faxes over fxo ports, or if I plug
<br>> a fax machine into an fxs port and call in to a spandsp extension the fax<br>> will be received just fine, so I am left thinking it must be the PRIs, but<br>> if all PRIs are this bad, how can anybody be using them?
<br>><br>> Tom<br>><br>><br>> On 5/19/06, Steve Hanselman <<a href="mailto:SteveH@brendata.co.uk">SteveH@brendata.co.uk</a>> wrote:<br>> > Sorry for the late reply but both of these are fine, we use spandsp to
<br>> > print some faxes and email others.<br>> ><br>> > We also route via a PRI to our other phone system to hylafax on an<br>> > analog modem and also to an analog fax.<br>> ><br>> > So what you want to do is fine and will work.
<br>> ><br>> > Steve<br>> ><br>> ><br>> > -----Original Message-----<br>> > From: <a href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a><br>
> > [mailto: <a href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a>] On<br>> Behalf Of Michael<br>> > Gaudette<br>> > Sent: 21 March 2006 20:34<br>> > To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
<br>> > Subject: RE: [Asterisk-Users] FAX over PRI<br>> ><br>> > Hmmm, Im not so sure I can apply this to me though. I just want to do<br>> > Fax-To-Email using PRI channels as the incoming lines. Not so much
<br>> > transfer<br>> > to a real fax.<br>> ><br>> > I am assuming that this is easily done with Asterisk? (I did it before<br>> > with<br>> > Asterisk SIP, but it only worked once every 10 tries or so)
<br>> ><br>> > Mike<br>> ><br>> > -----Original Message-----<br>> > From: <a href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a><br>> > [mailto:
<a href="mailto:asterisk-users-bounces@lists.digium.com">asterisk-users-bounces@lists.digium.com</a>] On<br>> Behalf Of Andrew<br>> > Kohlsmith<br>> > Sent: March 21, 2006 3:25 PM<br>> > To: <a href="mailto:asterisk-users@lists.digium.com">
asterisk-users@lists.digium.com</a><br>> > Subject: Re: [Asterisk-Users] FAX over PRI<br>> ><br>> > On Tuesday 21 March 2006 15:09, Michael Gaudette wrote:<br>> > > How should I consider Fax over PRI channels with Asterisk? Is the
<br>> > > quality and reliability good, or should I be prepared for alot of<br>> > grief?<br>> ><br>> > I'm having good success doing fax over PRI using a TE405; one span to<br>> > the<br>
> > PRI, the other to an FXS channel bank that is almost obscenely<br>> > underutilized<br>> > (3 channels).<br>> ><br>> > I also have channel bank - T100P - IAX2 - TE405 - PRI, where the IAX2
<br>> > link<br>> > is a 1-hop SDSL (VOIP only) data link. This works well too.<br>> ><br>> > -A.<br>> > _______________________________________________<br>> > --Bandwidth and Colocation provided by
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