Sorry, that was a bogus capture. Here is the correct packet: 10 00 00 00 00 00 00 00 86 00 00 00 0F 00 00 00 01 00 00 00 02 00 00 00 Which looks a lot more like what I would expect chan_skinny to do. Except it works on CCM and only turns on the line MWI on chan_skinny Any thoughts?