[asterisk-users] T38modem in loopback mode does not work on asterisk 1.4.20.1

[Thomas Kenyon]

Atis Lezdins wrote:
> On Fri, Apr 17, 2009 at 4:31 PM, Michael <michael at networkstuff.co.nz> wrote:
>>>> The problem is that there is no reliable, or really any viable way to
>>>> achieve this when using T.38 as the carrier uplink.
>>> Could You explain this? I really don't understand Your point.
>> On voip-info there is a how to using T38modem. Congrats to anyone who can get
>> it working.
> 
> Well, i initially wrote that howto, after numerous hours of
> unsuccessful compilations and wrong versions, but T38modem didn't
> prove to work with our provider. Later, one Russian guy managet to get
> this working with he's provider.
> 
That may explain why I couldn't get it to work :-).

I have accounts with 2 providers that are known to support T.38, the

At the moment, the most notable error I'm getting is on startup t38 reports:

error loading avcodec - avcodec: cannot open shared object file: No such
file or directory

> That's why i put CallWeaver (which basically has the same T.38 stack
> as Asterisk 1.6) in it's place.
> 
I shold have another play with that, I have a box dedicated to it after all.

>>>> The setup you describe does not have a audio data path connection to
>>>> Hylafax and I wonder why the convoluted method when the same could be
>>>> achieved using Callweaver alone and some custom scripting.
>>> Why would the audio data path would be necessary? In our setup
>>> CallWeaver effectively acts as modem, and talks T.38 with provider.
>> Fax information data path to be pedantic.
> 
> Data from Hylafax to CallWeaver is passed as TIFF image - thus no
> data/quality loss.
> 
How does this work? What do you use as the modem in hylafax?

> Regards,
> Atis
>