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

Atis Lezdins atis at iq-labs.net
Fri Apr 17 09:02:03 CDT 2009


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's why i put CallWeaver (which basically has the same T.38 stack
as Asterisk 1.6) in it's place.

>> > 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.

Regards,
Atis

-- 
Atis Lezdins,
VoIP Project Manager / Developer,
IQ Labs Inc,
atis at iq-labs.net
Skype: atis.lezdins
Cell Phone: +371 28806004
Cell Phone: +1 800 7300689
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