[Asterisk-Users] Development news :: T38 passthrough support

[Marco Mouta]

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 <oej at edvina.net> 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 - oej at edvina.net
> * 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
>