Re: [Asterisk-Users] Development news :: T38 passthrough support
On Wed, Mar 15, 2006 at 11:26:45AM +, Paul Hayes wrote: The SPA-2100 is the only one to support T.38 at the moment though. SPA-2002 has the ability to support t.38 (i.e. it has the processing power required) but the firmware support isn't there yet. Per our sales contact at Cisco for VoIP, they have no plans to release firmware for the SPA-2002 with T38 support. Instead they are supposedly developing a replacement product but it won't be ready for several months. Hopefully that info is wrong as it would seem to make a lot of sense for them to release T38 firmware for these devices. Ray ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
The SPA-2100 is the only one to support T.38 at the moment though. SPA-2002 has the ability to support t.38 (i.e. it has the processing power required) but the firmware support isn't there yet. C F wrote: On 3/11/06, Kristian Kielhofner [EMAIL PROTECTED] wrote: Olle E Johansson wrote: Friends in the Asterisk.org community, There is a lot of cool stuff going on in Asterisk development, things that will change Asterisk and make it work better in your organisation, make it easier to sell in your area or give you more consulting oppurtunities - in short, functionality that will make a lot of sense for you users. However, developers can't really get anywhere without a dialog with the users. You know what you need, you know what is missing and how you would like to make Asterisk a better choice. I am planning to send out a description of new features now and then, to inform you about what is going on, but also to get some feedback. The bug tracker is not only a tool for developers, but also for testers and users to react to changes and contribute. *** ITU T.38 -- Fax over VoIP Olle, Let's say that I wanted to setup a complete environment to test this. I presume that I would need the following: Fax machine T.38 compliant ATA (Sipura claims this) Asterisk server T.38 compliant something - does this need to be a Cisco 5300 (or similar)? Can it be just another plain ATA and fax machine? Another ATA like the SPA line should work on the second end as well. Please suggest some possible hardware! Thanks! -- Kristian Kielhofner ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
Olle E Johansson wrote: 11 mar 2006 kl. 23.44 skrev George Pajari: *** ITU T.38 -- Fax over VoIP It's not clear from the bug tracker if the problem with a T.38 endpoint (say ATA) behind NAT is working yet (with sip.conf specifying nat=yes/qualify=yes). Is this working or do both T.38 endpoints have to have public routable IP addresses still? I wasn't aware of this problem. Please tell me more! I can see at least one report so far confirming that T.38 doesn't work for nat=yes and canreinvite=no. I have the same problem. I am using the asterisk-1.2.4-t38-20060216.tar.bz2 patch against 1.2.4. Only one of the edinpoints is behind NAT. I did some sniffing and discovered that the problem appears after the asterisk server gets reINVITE for the T.38 session. Before the reINVITE asterisk will relay all RTP packets to the public IP of the NATed endpoint. After the T.38 reINVITE it will indeed switch to T.38 but all T.38 packets for the NATed endpoint suddenly start being sent to the private IP instead of the public one, never really reching that endpoint and resulting in failed fax transmission. See http://bugs.digium.com/view.php?id=5090 -- George Pajari, netVOICE communications604 484 VOIP (484 8647 x102) Open Source VoIP/Telephony Specialists 1 877 NET VOIP (638 8647 x102) www.netvoice.ca www.ip-centrex.ca www.digium.ca www.grandstream.ca www.sipura.ca www.snom.ca ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
On Wed, 2006-03-15 at 11:26 +, Paul Hayes wrote: The SPA-2100 is the only one to support T.38 at the moment though. SPA-2002 has the ability to support t.38 (i.e. it has the processing power required) but the firmware support isn't there yet. Any info on the SPA-3000 and t.38 support? Regards, Patrick ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
The sipura 2100 does work good with a AS5300 Zoa wrote: Does anybody know what devices really support t.38 ? I've seen a few claiming they do on the box, but most do not seem to support it at all. Zoa. Kristian Kielhofner wrote: Olle E Johansson wrote: Friends in the Asterisk.org community, There is a lot of cool stuff going on in Asterisk development, things that will change Asterisk and make it work better in your organisation, make it easier to sell in your area or give you more consulting oppurtunities - in short, functionality that will make a lot of sense for you users. However, developers can't really get anywhere without a dialog with the users. You know what you need, you know what is missing and how you would like to make Asterisk a better choice. I am planning to send out a description of new features now and then, to inform you about what is going on, but also to get some feedback. The bug tracker is not only a tool for developers, but also for testers and users to react to changes and contribute. *** ITU T.38 -- Fax over VoIP Olle, Let's say that I wanted to setup a complete environment to test this. I presume that I would need the following: Fax machine T.38 compliant ATA (Sipura claims this) Asterisk server T.38 compliant something - does this need to be a Cisco 5300 (or similar)? Can it be just another plain ATA and fax machine? Please suggest some possible hardware! Thanks! ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
11 mar 2006 kl. 23.44 skrev George Pajari: *** ITU T.38 -- Fax over VoIP It's not clear from the bug tracker if the problem with a T.38 endpoint (say ATA) behind NAT is working yet (with sip.conf specifying nat=yes/qualify=yes). Is this working or do both T.38 endpoints have to have public routable IP addresses still? I wasn't aware of this problem. Please tell me more! /O ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
Really interesting Olle We are expecting :) Miguel escribió: Olle E Johansson wrote: Asterisk won't be an T.38 endpoint, but will handle T.38 calls properly, regardless if the T.38 was offered in the original call setup, or if the caller suddenly sends a fax in the middle of a call (a re-invite). The requirement is that the incoming channel and the outbound channel both supports T38. If not, the call will be declined in a proper way. When this is tested and stable, work will continue to see if we can make Asterisk an T.38 endpoint. This is a very important addition to Asterisk. There is code for testing available. If you are interested, please check this URL in the bug tracker: http://bugs.digium.com/view.php?id=5090 I think this is a big step for Asterisk. Do you? If so, don't forget to say thank you to Steve Underwood - Coppice! Have a nice weekend! /Olle these are great news Olle, this is what im waiting for, keep the excelent work Steve, thank you very much . ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
Hi, yes, i do believe that T38 on Asterisk is a huge step! I've red about propriatery solutions with it , i was just wondering when Asterisk would get it. This project is just perfect, every day keeping in track with every one needs. Tthank you for your excellent work Steve Underwood! Best regards, Marco Mouta On 3/10/06, Olle E Johansson [EMAIL PROTECTED] wrote: Friends in the Asterisk.org community, There is a lot of cool stuff going on in Asterisk development, things that will change Asterisk and make it work better in your organisation, make it easier to sell in your area or give you more consulting oppurtunities - in short, functionality that will make a lot of sense for you users. However, developers can't really get anywhere without a dialog with the users. You know what you need, you know what is missing and how you would like to make Asterisk a better choice. I am planning to send out a description of new features now and then, to inform you about what is going on, but also to get some feedback. The bug tracker is not only a tool for developers, but also for testers and users to react to changes and contribute. *** ITU T.38 -- Fax over VoIP Fax over VoIP is a hot issue. VoIP service providers encourage people to switch to VoIP, but often forget to mention that faxing over VoIP is like russian roulette. On a local LAN, it might work if you pick a clear channel codec like G.711. Steve Underwood, member of the Asterisk developer team, has writen a good article about the problems involved and the solutions for it on his web site, the URL is http://soft- switch.org/foip.html T.38 is an ITU standard for fax over VoIP. To simplify, the idea is to decode the fax audio stream at the ingress point, convert it to a data stream that is not sensitive towards jitter or delays and encode it into audio again if needed at the other end of the call - if you can't convert it to an image somewhere in the middle and print it directly, or send it by e-mail. *** T.38 PASSTHROUGH in Asterisk Steve is the main contributor behind the work for T38 support in Asterisk. He's also the author of spandsp - the fax application that many use in Asterisk. The first part is to be able to send T38 calls to your Asterisk PBX and make Asterisk recognize this and forward the data stream to another endpoint that supports T.38. Asterisk won't be an T.38 endpoint, but will handle T.38 calls properly, regardless if the T.38 was offered in the original call setup, or if the caller suddenly sends a fax in the middle of a call (a re-invite). The requirement is that the incoming channel and the outbound channel both supports T38. If not, the call will be declined in a proper way. When this is tested and stable, work will continue to see if we can make Asterisk an T.38 endpoint. This is a very important addition to Asterisk. There is code for testing available. If you are interested, please check this URL in the bug tracker: http://bugs.digium.com/view.php?id=5090 I think this is a big step for Asterisk. Do you? If so, don't forget to say thank you to Steve Underwood - Coppice! Have a nice weekend! /Olle --- * Olle E. Johansson - [EMAIL PROTECTED] * Asterisk Training http://edvina.net/training/ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
Olle E Johansson wrote: Friends in the Asterisk.org community, There is a lot of cool stuff going on in Asterisk development, things that will change Asterisk and make it work better in your organisation, make it easier to sell in your area or give you more consulting oppurtunities - in short, functionality that will make a lot of sense for you users. However, developers can't really get anywhere without a dialog with the users. You know what you need, you know what is missing and how you would like to make Asterisk a better choice. I am planning to send out a description of new features now and then, to inform you about what is going on, but also to get some feedback. The bug tracker is not only a tool for developers, but also for testers and users to react to changes and contribute. *** ITU T.38 -- Fax over VoIP Olle, Let's say that I wanted to setup a complete environment to test this. I presume that I would need the following: Fax machine T.38 compliant ATA (Sipura claims this) Asterisk server T.38 compliant something - does this need to be a Cisco 5300 (or similar)? Can it be just another plain ATA and fax machine? Please suggest some possible hardware! Thanks! -- Kristian Kielhofner ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
Does anybody know what devices really support t.38 ? I've seen a few claiming they do on the box, but most do not seem to support it at all. Zoa. Kristian Kielhofner wrote: Olle E Johansson wrote: Friends in the Asterisk.org community, There is a lot of cool stuff going on in Asterisk development, things that will change Asterisk and make it work better in your organisation, make it easier to sell in your area or give you more consulting oppurtunities - in short, functionality that will make a lot of sense for you users. However, developers can't really get anywhere without a dialog with the users. You know what you need, you know what is missing and how you would like to make Asterisk a better choice. I am planning to send out a description of new features now and then, to inform you about what is going on, but also to get some feedback. The bug tracker is not only a tool for developers, but also for testers and users to react to changes and contribute. *** ITU T.38 -- Fax over VoIP Olle, Let's say that I wanted to setup a complete environment to test this. I presume that I would need the following: Fax machine T.38 compliant ATA (Sipura claims this) Asterisk server T.38 compliant something - does this need to be a Cisco 5300 (or similar)? Can it be just another plain ATA and fax machine? Please suggest some possible hardware! Thanks! ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
*** ITU T.38 -- Fax over VoIP It's not clear from the bug tracker if the problem with a T.38 endpoint (say ATA) behind NAT is working yet (with sip.conf specifying nat=yes/qualify=yes). Is this working or do both T.38 endpoints have to have public routable IP addresses still? g. -- George Pajari, netVOICE communications604 484 VOIP (484 8647 x102) Open Source VoIP/Telephony Specialists 1 877 NET VOIP (638 8647 x102) www.netvoice.ca www.ip-centrex.ca www.digium.ca www.grandstream.ca www.sipura.ca www.snom.ca ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
On 3/11/06, Kristian Kielhofner [EMAIL PROTECTED] wrote: Olle E Johansson wrote: Friends in the Asterisk.org community, There is a lot of cool stuff going on in Asterisk development, things that will change Asterisk and make it work better in your organisation, make it easier to sell in your area or give you more consulting oppurtunities - in short, functionality that will make a lot of sense for you users. However, developers can't really get anywhere without a dialog with the users. You know what you need, you know what is missing and how you would like to make Asterisk a better choice. I am planning to send out a description of new features now and then, to inform you about what is going on, but also to get some feedback. The bug tracker is not only a tool for developers, but also for testers and users to react to changes and contribute. *** ITU T.38 -- Fax over VoIP Olle, Let's say that I wanted to setup a complete environment to test this. I presume that I would need the following: Fax machine T.38 compliant ATA (Sipura claims this) Asterisk server T.38 compliant something - does this need to be a Cisco 5300 (or similar)? Can it be just another plain ATA and fax machine? Another ATA like the SPA line should work on the second end as well. Please suggest some possible hardware! Thanks! -- Kristian Kielhofner ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[Asterisk-Users] Development news :: T38 passthrough support
Friends in the Asterisk.org community, There is a lot of cool stuff going on in Asterisk development, things that will change Asterisk and make it work better in your organisation, make it easier to sell in your area or give you more consulting oppurtunities - in short, functionality that will make a lot of sense for you users. However, developers can't really get anywhere without a dialog with the users. You know what you need, you know what is missing and how you would like to make Asterisk a better choice. I am planning to send out a description of new features now and then, to inform you about what is going on, but also to get some feedback. The bug tracker is not only a tool for developers, but also for testers and users to react to changes and contribute. *** ITU T.38 -- Fax over VoIP Fax over VoIP is a hot issue. VoIP service providers encourage people to switch to VoIP, but often forget to mention that faxing over VoIP is like russian roulette. On a local LAN, it might work if you pick a clear channel codec like G.711. Steve Underwood, member of the Asterisk developer team, has writen a good article about the problems involved and the solutions for it on his web site, the URL is http://soft- switch.org/foip.html T.38 is an ITU standard for fax over VoIP. To simplify, the idea is to decode the fax audio stream at the ingress point, convert it to a data stream that is not sensitive towards jitter or delays and encode it into audio again if needed at the other end of the call - if you can't convert it to an image somewhere in the middle and print it directly, or send it by e-mail. *** T.38 PASSTHROUGH in Asterisk Steve is the main contributor behind the work for T38 support in Asterisk. He's also the author of spandsp - the fax application that many use in Asterisk. The first part is to be able to send T38 calls to your Asterisk PBX and make Asterisk recognize this and forward the data stream to another endpoint that supports T.38. Asterisk won't be an T.38 endpoint, but will handle T.38 calls properly, regardless if the T.38 was offered in the original call setup, or if the caller suddenly sends a fax in the middle of a call (a re-invite). The requirement is that the incoming channel and the outbound channel both supports T38. If not, the call will be declined in a proper way. When this is tested and stable, work will continue to see if we can make Asterisk an T.38 endpoint. This is a very important addition to Asterisk. There is code for testing available. If you are interested, please check this URL in the bug tracker: http://bugs.digium.com/view.php?id=5090 I think this is a big step for Asterisk. Do you? If so, don't forget to say thank you to Steve Underwood - Coppice! Have a nice weekend! /Olle --- * Olle E. Johansson - [EMAIL PROTECTED] * Asterisk Training http://edvina.net/training/ ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Development news :: T38 passthrough support
Olle E Johansson wrote: Asterisk won't be an T.38 endpoint, but will handle T.38 calls properly, regardless if the T.38 was offered in the original call setup, or if the caller suddenly sends a fax in the middle of a call (a re-invite). The requirement is that the incoming channel and the outbound channel both supports T38. If not, the call will be declined in a proper way. When this is tested and stable, work will continue to see if we can make Asterisk an T.38 endpoint. This is a very important addition to Asterisk. There is code for testing available. If you are interested, please check this URL in the bug tracker: http://bugs.digium.com/view.php?id=5090 I think this is a big step for Asterisk. Do you? If so, don't forget to say thank you to Steve Underwood - Coppice! Have a nice weekend! /Olle these are great news Olle, this is what im waiting for, keep the excelent work Steve, thank you very much . ___ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
