Dectmon only recording data partially?

Patrick McHardy kaber at
Sun Nov 14 13:10:07 UTC 2010

On 14.11.2010 14:04, Patrick McHardy wrote:
> On 14.11.2010 01:55, Erik Tews wrote:
>> I now switched that to:
>> dect-cluster-add --name cluster0 --emc $EMC --fpn $FPN --mode pp
>> dect-cell-add --name cell0 --cluster cluster0  --flags monitor
>> dect-transceiver-bind --transceiver trx0 --cell cell0
>> But I still have the same problem.
>> Do I need a newer kernel than commit
>> 75a0d091dc8074ef940932cf6027fcdf59277070 to run the kernel in
>> monitoring-mode?
> No, that one should be fine. If you're still seeing
>> netlink: message group: 4
> without FPC and HLC following, that means that the PP lost lock
> with the FP. If you enable debugging for mac_csf.c, you should
> see the reason in the logs.


> 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

It seems your FP doesn't support ciphering, so its possible that it
doesn't broadcast the multi-frame number, which my stack expects.
It shouldn't have locked to the FP in that case though.

Perhaps the FP broadcasts the MFN at a lesser frequency than defined
in the standard - if the stack doesn't receive the MFN at least every
8 multiframes (T216), it unlocks from the FP.

More information about the linux-dect mailing list