DECT Call drops after approx. 2 seconds

Patrick McHardy kaber at
Sat Mar 19 01:02:37 UTC 2011

Am 17.03.2011 16:33, schrieb Johannes Graser:
> Hi,
> I successfully managed to compile the DECT kernel, the libs and asterisk. I also can register PPs in asterisk, call them and place outbound calls from these PPs, but as soon as the connection is established, it takes about 2 seconds until the call drops, the PP loses connectivity and re-registers at asterisk. Whithin these 2 seconds the connection works in both directions correctly. I use the PCI Com-on-Air Card a Gigaset A58H PP and an older Gigaset 4000 Comfort.
> Does anyone know what the reason for this behaviour is? See the asterisk-log below...

This usually means the PTs got desynchronized. Do both phones reregister
after the call got dropped?

Please try the following to get some more debugging information:

- build kernel with CONFIG_DYNAMIC_DEBUG=y
- mount -t debugfs none /sys/kernel/debug/
- before placing a call, execute:

  echo -n 'file mac_csf.c +p'       > /debug/dynamic_debug/control
  echo -n 'file mac_ccf.c +p'       > /debug/dynamic_debug/control

- after the call execute the same commands with -p and send the
  kernel log messages that got logged during that period.

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