Change the <br>RTP Packet Size: 0.010<br>
<br>
to <br>
<br>
RTP Packet Size: 0.020<br>
<br>
Asterisk only work with 2 frames. <br>
<br>
I can't send any fax with other values.<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br><div><span class="gmail_quote">On 1/5/06, <b class="gmail_sendername">Joash Herbrink</b> <<a href="mailto:Joash.Herbrink@kahuna.nl">Joash.Herbrink@kahuna.nl</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;">
You could use a cisco ata 186.<br>There aren't very cheap, but I have made them work on several of my<br>customer sites with faxes.<br><br>The ata just registers to the * server as a SIP endpoint.<br><br>Also, echo cancelling and other "intelligent" things are bad when
<br>dealing with faxes and modems.<br><br>Just use the cisco ATA (or any simple vegastream ATA device) to send /<br>receive faxes.<br><br>Codec should always be G.711 and no CNG or VAD or echo canceling should<br>be used, fax machines take care of that themselves.
<br><br>(Contact me of list if you any of the mentioned devices)<br><br>Joash<br><a href="mailto:joash@kahuna.nl">joash@kahuna.nl</a><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 Behalf Of Remco<br>Barende<br>Sent: Thursday, January 05, 2006 4:42 PM
<br>To: Asterisk Users Mailing List - Non-Commercial Discussion<br>Subject: Re: [Asterisk-Users] Fax with Asterisk and Sipura 2100<br><br>I tried to get it working for a very long time (over a year) with every<br>possible set of config parameters I could find both for * as well as for
<br><br>the Sipura's. Echo cancelling etc. etc. all changed but still problems.<br><br>I tried to get it working on an * box with a BRI line.<br><br>Finally I have given up and attached a traditional ISDN -> Analog (A/B)
<br>converter to the ISDN line for the faxing bit next to Asterisk.<br><br>I have yet to find a similar solution for faxing with a PRI, I'm afraid<br>it<br>will be impossible because as far as I know it's not possible to hook up
<br><br>some sort of A/B adapter next to the * box on one pri line.<br><br>I think it can work if your fax machines are capable of capping fax<br>tx/rx<br>speeds to 9600 baud maximum without error correction. However it seems
<br>that not a single producer of FAX equipment (be it modems, all-in-one<br>devices or even dedicated fax machines) offer such an option. HP doesn't<br><br>seem very interested in capping the fax speeds for their all-in-one
<br>thingies.<br><br>All fax products keep trying to transmit/receive at higher speeds<br>after which the fax will fail completely or after the second page.<br><br>Maybe there is a solution coming for PRI faxing. Junghanns informed me
<br>some time ago that they were working on a PRI card with a possibility to<br><br>sync the clock to other cards.<br><br>If this works in theory you could use a Junghanns PRI card and a<br>Junghanns<br>BRI card, sync the clocks and keep the path fully digital without lost
<br>frames. On their website however they only mention the possibility to<br>interconnect the PRI cards, not (yet?) PRI <-> BRI.<br><br><br><br>On Thu, 5 Jan 2006, Darrell Long wrote:<br><br>> I know the subject of faxing has been covered in some detail, but I
<br>was<br>> wondering if anyone has a hardware configuration similar to ours that<br>has<br>> faxes working successfully and would be willing to share any<br>> settings/insight.<br>><br>> We are unable to fax reliably with a Sipura 2100 connected to
<br>Asterisk. We do<br>> not route calls over the Internet and our network has very low<br>latency. The<br>> Asterisk servers connect to Cisco Routers that have PRIs from various<br>> carriers. We have all the recommended settings in the Sipura ATA, with
<br>Echo<br>> Cancellation and Silence Suppression off, uLaw only for the codec,<br>etc.<br>><br>> While I realize that no faxes going through passthrough like this will<br>work<br>> 100% of the time, we currently have a less than 40% success rate with
<br>inbound<br>> faxes being the worst.<br>><br>> Any insight anyone has would be greatly appreciated!<br>><br>> Best Regards,<br>><br>><br>_______________________________________________<br>--Bandwidth and Colocation provided by
<a href="http://Easynews.com">Easynews.com</a> --<br><br>Asterisk-Users mailing list<br>To UNSUBSCRIBE or update options visit:<br> <a href="http://lists.digium.com/mailman/listinfo/asterisk-users">http://lists.digium.com/mailman/listinfo/asterisk-users
</a><br><br>_______________________________________________<br>--Bandwidth and Colocation provided by <a href="http://Easynews.com">Easynews.com</a> --<br><br>Asterisk-Users mailing list<br>To UNSUBSCRIBE or update options visit:
<br> <a href="http://lists.digium.com/mailman/listinfo/asterisk-users">http://lists.digium.com/mailman/listinfo/asterisk-users</a><br></blockquote></div><br>