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<TITLE>RE: yet another faxing issue (outbound only, via ATA)</TITLE>
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<P><FONT SIZE=2>Follow up:<BR>
I used my Cisco 3660 that's a hop away and connected to a different PRI provider.<BR>
Faxes work _fine_<BR>
<BR>
>From the ATA box<BR>
I faxed a DID that would come back into the Zap enabled Asterisk server, then talks BACK to the server that the ATA box is regstered via IAX2 (or SIP, I found they both worked) and was able to receive the fax fine (incoming fax went to email)<BR>
<BR>
FAILURE FAX:<BR>
Here is the path:<BR>
ATA -> SIP -> * -> IAX2 (or SIP) -> * with Zap -> send call out via Zap channel<BR>
<BR>
SUCCESS FAX:<BR>
ATA -> SIP -> * -> IAX2 (or SIP) -> * with Zap -> SIP to 3660 then out via PRI<BR>
<BR>
works every time!<BR>
<BR>
I tried G3 and ECM mode.<BR>
ECM was flakey work even through the 3660 but G3 worked everytime. I have set the fax machine to G3 for the time being since it works each time.<BR>
<BR>
Each outbound call actually initiates a call to a DID that terminates into my * with the Zap card, then talks via IAX2 again back to the original server. No problems there.<BR>
<BR>
So I know that faxing other fax machines fails so it's not necessarily that there is some weird loop calling out and coming back in the same Zap card is there?<BR>
<BR>
Recap hardware: Sangoma A101<BR>
Echo cancel: yes (and zap show channel confirms it's enabled)<BR>
I would think if echo cancel was the problem incoming faxes would fail as well?<BR>
<BR>
So...wtf?!<BR>
I am surprised the 3660 is working outbound where the Sangoma is not, since it can receive fine. The 3660 has a HDV card in it with DSPs to do the processing but the load on the Asterisk servers barely goes above 0.00.<BR>
<BR>
So to recap:<BR>
<BR>
ATA works fine sending and my Asterisk servers are ok<BR>
Sending the outbound call via SIP to my 3660 a hop away (DS3) to be routed out the PSTN (which then comes back to my Asterisk with the Sangoma card) works fine!<BR>
Sending the outbound fax via the Zap channels on the Asterisk server (the same one that talks to the 3660 via SIP that works) FAILS<BR>
Receiving faxes from anywhere into the Sangoma which talks to my 2nd asterisk server works fine as well!<BR>
<BR>
Bill<BR>
<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: Bill Gibbs<BR>
Sent: Tue 1/2/2007 2:44 PM<BR>
To: Asterisk Users Mailing List - Non-Commercial Discussion<BR>
Subject: yet another faxing issue (outbound only, via ATA)<BR>
<BR>
2 Asterisk servers 1.2.12.1<BR>
<BR>
Connected via IAX2, same switch, GigE, no packet loss, etc<BR>
<BR>
1 with a Sangoma A101 for a PRI to the PSTN<BR>
<BR>
Ulaw<BR>
<BR>
QoS enabled<BR>
<BR>
NAT for the registered ATA boxes, no nat between the * servers<BR>
<BR>
<BR>
<BR>
Faxing inbound:<BR>
<BR>
Call from PRI hits the first Asterisk server<BR>
<BR>
Then talks to the 2nd via IAX2<BR>
<BR>
NVFaxDetect receives the fax, converts to PDF and emails it out<BR>
<BR>
<BR>
<BR>
Works great! Never had an issue<BR>
<BR>
<BR>
<BR>
The problem, however is outbound.<BR>
<BR>
<BR>
<BR>
Sipura 1001 ATAs. Fax machine connected to the ATA.<BR>
<BR>
<BR>
<BR>
Registered to the 2nd asterisk box. Keep in mind this server runs voice calls just fine.<BR>
<BR>
<BR>
<BR>
Outbound calls from this box are ulaw<BR>
<BR>
The call is then sent via IAX2 (also tried SIP as well) to the Asterisk server w/ the PRI, then out to the world<BR>
<BR>
<BR>
<BR>
Hit and miss to send faxes out<BR>
<BR>
Echo cancellation is enabled on the PRI<BR>
<BR>
I have lowered the rxgain and txgain to -5.0, seems fine for voice.<BR>
<BR>
The ATA is running 3.1.8 firmware from Sipura with fax detect turned<BR>
<BR>
<BR>
<BR>
Usually the faxes fail, but sometimes you will get all the pages, but only a fraction of the page.<BR>
<BR>
<BR>
<BR>
I have tried turning off ECM but still the same issue.<BR>
<BR>
<BR>
<BR>
I would suspect the Sangom or IAX2, or something of that nature except receiving faxes traveling to the 2nd asterisk box works just fine!<BR>
<BR>
<BR>
<BR>
I also tried to register the ATA to the primary Asterisk server w/ the PRI, same exact issue.<BR>
<BR>
<BR>
<BR>
Any ideas - better luck w/ Grandstream?<BR>
<BR>
<BR>
<BR>
I suspect the problem is not Asterisk, or the Sangoma, or jitter or bandwidth since receiving faxes works fine. I did not try to receive faxes through the ATA to the machine itself, I tried that a few months ago during other testing, never got it to work so I never tried again once I got NVFaxDetect working for email.<BR>
<BR>
<BR>
<BR>
My next step is to connect the fax machine to a Wildcard X100P.<BR>
<BR>
<BR>
<BR>
Any other suggestions? Black magic? Voodoo?<BR>
<BR>
<BR>
<BR>
Bill<BR>
<BR>
<BR>
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