[EMAIL PROTECTED] schrieb:
>> Hi all!
> 
> Hello
> 
>> My question is not 100% callweaver related, but I know there are several
>> T.38 experts on the list thus I hope you can give me some hints.
>>
>> What is the best method to debug T.38 - e.g. I have a T.38 ATA and a
>> T.38 capable gateway (e.g. callweaver but also others). ReINVITE to T.38
>> works, but after some time the transmission stops and I want to find out
>> who is guilty: the ATA? the Gateway? the analog fax?
>>
>> Are there any tools (beside wireshark) to debug the T.38 session? Are
>> you aware of any tutorials for T.38 debugging?
> 
> Wireshark is all I've ever used for T.38 debugging, it's great.
> 
> There's a pretty detailed tutorial here, but it's Cisco oriented:
> 
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123cgcr/vvfax_c/voipt_c/vts_fax.htm

Hi Damjan!

Thanks, this was really a good starting point. Do you know are there any 
papers/reports/personal experience about the robustness of T.38 against 
jitter/delay/loss?

btw I wonder about the bandwidth consumption of T.38. Is it really just 
the fax bandwidth (e.g. 14400 bits/s) plus the IP/UDP header or is there 
something else?

thanks
Klaus

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