Re: [asterisk-users] Asterisk T38
On Wed, Sep 22, 2010 at 10:46 AM, Adam Moffett a...@plexicomm.net wrote: That's probably what I'm going to have to do. Thanks. I suppose that merely removing ATA and asterisk from the middle, and plugging a pots line into a fax machine is out of the question. If you are running 1.6, you can try this - https://issues.asterisk.org/view.php?id=13405 I have this implemented on our production system but I personally get hit and miss results with it. Sometimes it doesn;t seem to detect its a fax call. The fax typically goes through fine over g.711u though as long as you have good network links. My setup previously included a couple of lan-extensions over DSL and it was pretty unreliable on them if there was other network traffic going on even with QoS on the edge routers heavily favoring the phone traffic. https://issues.asterisk.org/view.php?id=13405If you are running 1.4 you can try this - http://www.zoiper.com/foip/ I used this back before zoiper acquired the company that owned it and it worked absolutely perfect. I haven;t tried it since its been open sourced and had 3rd party people patch it current versions of asterisk though. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] Asterisk T38
In the simplest terms I can think of, I'm going to describe what I want to do and I want to know if it's possible in the current version of asterisk. Can I take a T38 call from an ATA, convert that back to analog and have asterisk screech that out on a POTS line to a remote fax machine. Would it work? And could I receive an incoming fax the same way? Please don't talk to me about alternatives to faxing. I can't take the fax machine away from the end user, they don't want to hear about it. I either need to make it work or tell them to get a POTS line. attachment: t38 diagram.jpg-- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk T38
On 09/22/2010 09:00 AM, Adam Moffett wrote: In the simplest terms I can think of, I'm going to describe what I want to do and I want to know if it's possible in the current version of asterisk. Can I take a T38 call from an ATA, convert that back to analog and have asterisk screech that out on a POTS line to a remote fax machine. Would it work? And could I receive an incoming fax the same way? This is called T.38 gateway mode, and it's not available in any Asterisk releases yet. This has been discussed quite often on this mailing list, though, so a Google search of the list archives would give you pointers to the methods you can use today to achieve this. Asterisk 1.8 was just enhanced to provide some new APIs that will be necessary for seamless implementation of T.38 gateway mode, and we expect that work on that will occur in the very near future. -- Kevin P. Fleming Digium, Inc. | Director of Software Technologies 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA skype: kpfleming | jabber: kflem...@digium.com Check us out at www.digium.com www.asterisk.org -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk T38
On Wed, Sep 22, 2010 at 10:00 AM, Adam Moffett a...@plexicomm.net wrote: In the simplest terms I can think of, I'm going to describe what I want to do and I want to know if it's possible in the current version of asterisk. Can I take a T38 call from an ATA, convert that back to analog and have asterisk screech that out on a POTS line to a remote fax machine. Would it work? And could I receive an incoming fax the same way? I suppose that merely removing ATA and asterisk from the middle, and plugging a pots line into a fax machine is out of the question. Sounds like you want a T.38 gateway. Not built into asterisk, but some people have tried patching. Search the archives for T.38 gateway. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk T38
That's probably what I'm going to have to do. Thanks. I suppose that merely removing ATA and asterisk from the middle, and plugging a pots line into a fax machine is out of the question. -- _ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- New to Asterisk? Join us for a live introductory webinar every Thurs: http://www.asterisk.org/hello asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[asterisk-users] Asterisk T38 and Dialogic DMG 2000
Hi All, I have Asterisk 1.4.21.1 and Dialogic DMG 2000 firmware 6.0.103. Trying to pass t38 fax calls setup like this: fax machineATA (linksys and mediatrix)SIPAsteriskSIPDMG GWPRI From the fax outbound through the PRI works great, seems to be reliable, 40+ faxes with 5 different fax machines tested, plus an efax service. The problem is the other way, PRI inbound to fax, the call doesn't setup between the GW and Asterisk. I have the issued narrowed down to the SIP messaging between the DMG and Asterisk. The DMG invite sends to asterisk: m=audio 49016 RTP/AVP 0 101 [notice the m=audio] a=rtpmap:0 PCMU/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 m=image 0 udptl t38 a=T38FaxRateManagement:transferredTCF a=T38FaxUdpEC:t38UDPRedundancy And Asterisk responds with the 200 OK: m=image 29475 udptl t38 [notice the m=image] a=T38FaxVersion:0 a=T38FaxFillBitRemoval:0 a=T38FaxTranscodingMMR:0 a=T38FaxTranscodingJBIG:0 a=T38FaxRateManagement:transferredTCF a=T38FaxMaxBuffer:400 a=T38FaxMaxDatagram:400 a=T38FaxUdpEC:t38UDPRedundancy I've been corresponding with Dialogic engineering on the messaging and they report that the gateway receiving m=image is not compatible or is telling the gw to immediately setup the call at T38 with is not compatible. The gateway wants to setup the call as audio first, hear the CNG tones and then re-invite to t38. So my question: Is there a way for configuring Asterisk to respond with m=audio instead of m=image? If I disable udptl in Asterisk, call setup fine with audio. Thanks. JR -- - JR Richardson Engineering for the Masses ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [asterisk-users] Asterisk T38 and Dialogic DMG 2000
JR, On Mon, Sep 8, 2008 at 3:08 PM, JR Richardson [EMAIL PROTECTED] wrote: The DMG invite sends to asterisk: m=audio 49016 RTP/AVP 0 101 [notice the m=audio] a=rtpmap:0 PCMU/8000/1 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-15 m=image 0 udptl t38 a=T38FaxRateManagement:transferredTCF a=T38FaxUdpEC:t38UDPRedundancy And Asterisk responds with the 200 OK: m=image 29475 udptl t38 [notice the m=image] a=T38FaxVersion:0 a=T38FaxFillBitRemoval:0 a=T38FaxTranscodingMMR:0 a=T38FaxTranscodingJBIG:0 a=T38FaxRateManagement:transferredTCF a=T38FaxMaxBuffer:400 a=T38FaxMaxDatagram:400 a=T38FaxUdpEC:t38UDPRedundancy I've been corresponding with Dialogic engineering on the messaging and they report that the gateway receiving m=image is not compatible or is telling the gw to immediately setup the call at T38 with is not compatible. The gateway wants to setup the call as audio first, hear the CNG tones and then re-invite to t38. That's how T.38 gateways typically work. This particular gateway seems to have some advanced knowledge that the call may be converted into T.38 later. They are offering m=image with port number set to 0 in the INVITE. By doing this, they seem to be offering a sort heads up that the call may be converted to T.38 later but no T.38 now because the port number is zero. This hint is of no use to Asterisk. If you can get the gateway to not send the m=image line in the first INVITE, they you may be in luck. So my question: Is there a way for configuring Asterisk to respond with m=audio instead of m=image? If I disable udptl in Asterisk, call setup fine with audio. This seems like a bug in Asterisk. Asterisk is encoding the SDP in 200 OK incorrectly on two fronts. It's dropping the m=audio line completely and it's activating T.38 stream when the remote end hasn't asked it to do so. -- Raj Jain ___ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
