Dectmon only recording data partially?

Hi I have a strange problem with dectmon. I would like to monitor the conversations between a Siemens AS150 and it's base station. I started the cluster in monitoring mode with the same emc and fpn as the original base station in pp mode: dect-cluster-add --name cluster0 --emc $EMC --fpn $FPN --mode pp --monitor dect-cell-add --name cell0 --cluster cluster0 dect-transceiver-bind --transceiver trx0 --cell cell0 Now, when I launch dectmon, I get these messages: # ./dectmon -n yes netlink: cluster0: mode PP ARI: class A: EMC: 0ff6 FPN: 0deb7 LCE: set default pmid e94bd LCE: registered protocol 0 (Link Control) LCE: registered protocol 3 (Call Control) LCE: registered protocol 4 (Call Independant Supplementary Services) LCE: registered protocol 6 (ConnectionLess Message Service) LCE: registered protocol 5 (Mobility Management) netlink: message group: 4 netlink: FPC: full_slot,page_repetition,basic_a_field_setup,in_min_delay netlink: HLC: adpcm_g721_voice,gap_pap_basic_speech,standard_authentication,location_registration unknown unknown netlink: message group: 4 Should't there be more output? I am sure that at least some location registration or authentication messages are exchanged here. I am running 2.6.36, but I did not update to the latest version in the git tree yet.