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Wireshark-users: [Wireshark-users] gprscdr

From: Edward Vogel <edwardvogel1@xxxxxxxxx>
Date: Fri, 26 Feb 2016 19:38:08 -0500
Hi all,
I have some CDRs in a file that I'm trying to decode with wireshark or tshark. The file has the raw asn.1 ber with no encapsulation. I found the "HowToDissectAnything" page which seems to give exactly what I need.
I got the http example from that page to work:
$ tshark -o 'uat:user_dlts:"User 0 (DLT=147)","http","0","","0",""' -r httpresp.pcap 
  1   0.000000              ->              HTTP  HTTP/1.1 200 OK 

But trying the same thing with a CDR doesn't seem to work:
$ tshark -o 'uat:user_dlts:"User 0 (DLT=147)","gprscdr","0","","0",""' -r 1.pcap 
tshark: Invalid -o flag "uat:user_dlts:"User 0 (DLT=147)","gprscdr","0","","0","""

Any ideas?
Thanks,
Ed