Sean,
Looks like the regex in SyslogProcessing.py for adtran is not even close to syslog you are recieving:
regex
"^(?P<deviceModel>[^\[]+)\[(?P<deviceManufacturer>ADTRAN)\]:(?P<component>[^\|]+\|\d+\|\d+)\|(?P<summary>.*)"
syslog
'Nov 27 2013 15:57:40 192.168.13.20 19980,55489,11/27/13,15:57,OMM-48L,1-HS2-S12-1-3-1-20,Major,UNEQ-V,0,0,0'
Looks like you syslog has a timestamp and then maybe the device, but after that I am not sure what the message is stating. If you can decifer a little, we might be able to help with a regex to parse it (ie: is there a component in the message list an interface? What is the actual message summary?)
--Rob