[Freeswitch-users] Faxing with FreeSWITCH

[bruce at sqls.net]

Hello! I'm working on setting up a FreeSWITCH/Flowroute fax server. The 
server is connected without any nat on a 20MB fiber internet connection. 
I've built some lua scripts that allow me to receive and send faxes and 
log all the faxes to a sqlite database. I even have a management script 
that can be called from the fs_cli to add fax2email routes and adjust 
settings. It's still a pretty rough implementation but overall it's 
working fairly well but I have two main questions that I hope someone 
could help me with.

1) I would like to detect "voice calls" or maybe I want to detect fax 
calls? There's a dialplan function to listen for and detect a fax caller 
but I'm having trouble implementing it in my lua script. It seems it's a 
non-blocking function, maybe? Because it just walks right over that line 
instead of waiting and listening for any fax tones. I thought it would 
block the script for x seconds and listen for a fax tone and return a 
result based on what it found. Can someone help me accomplish something 
similar to that?

2) So far, by far... my most common error is "The call dropped 
prematurely". I'm not sure how to start debugging the error to figure 
out what's causing it and how (if I can) solve it. I do have pcap's of 
the calls from pcapsipdump and I also have the freeswitch log of each 
call (my lua script pulls and saves that for each fax call). I've opened 
the pcap files up in wireshark but I don't know what I'm looking for and 
I think that might be over my head at the moment. Can anyone give me any 
help on what this error is normally caused by or what I could look for 
and/or test?

Here are a couple of example logs that ended with "The call dropped 
prematurely".
http://bmts.us/faxlogs/FAX-2e913a50-3a4f-4abc-9882-a323a97e5138.log
http://bmts.us/faxlogs/FAX-59d02d9d-c4ba-44c2-8edd-a1c9142c7c1c.log

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