[asterisk-users] Fwd: Re: Asterisk T.38 Pass-Through doesn't work

[Joshua Colp]

Zoltán Fekete wrote:
> Thank You Larry!
>
> I have discussed with my provider. They are not able to insert the
> T38MaxBitRate value into the sip answer. :(
> https://gist.github.com/anonymous/6120148 (line 559)
>
> That means we are not able to passtrough T38 Faxes with any asterisk
> version at all?
> What do you mean? Am I able to modify and compile the source? Is it
> compicated? (I'm not a developer)

Based on the SDP in your gist the remote implementation has given no 
attributes with the T.38 stream which makes it pretty broken 
(T38FaxRateManagement is mandatory) and fun. The two hard parts really 
would be 1. Modifying Asterisk in a sane fashion to cope and 2. 
Determining the exact settings to make the implementation happy. 
Defaults as defined in the spec are fine and good, but my experience has 
taught me to throw those out the window when it comes to actual 
implementations.

Cheers,

-- 
Joshua Colp
Digium, Inc. | Senior Software Developer
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at:  www.digium.com  & www.asterisk.org