Dears, Can you explain how to add packages to wire shark ? I quoted the following : A-bis OML dissector¶ <http://openbsc.osmocom.org/trac/wiki/PacketDump#A-bisOMLdissector> To add a dissector for the GSM 12.21 A-bis Organization and Maintenance Layer (OML), you can use the abis_oml.patch file from the wireshark directory of our git repository. This will be submitted for inclusion into wireshark soon. From http://openbsc.osmocom.org/trac/wiki/PacketDump is the above updated on the latest apt-get install wireshark , or we need to get the sources and apply the patch !!! plz let me know how ? Omar Atia TPSG Functional Consultant ITS Logo.png T. + (961) 9 641555 ext. 416 M. + (961) 3 001294 F. + (961) 9 641555 ext. 217 degital signeture.pngE. <mailto:omar.atia@its.ws> omar.atia@its.ws