We're going to switch over the supervision cards in order to resolve the management problem on the DSLAM.
No impact on clients synchronisation.

Update(s):

Date: 2013-11-20 01:29:16 UTC
problem fixed.

Date: 2013-11-20 01:29:09 UTC
dslam up / clients up

Date: 2013-11-20 01:29:02 UTC
rebooting dslam...

Date: 2013-11-20 01:28:57 UTC
saving conf

Date: 2013-11-19 18:00:51 UTC
The switchover has not resolved the problem, we will reboot the DSLAM tonight at around 1:00, outage of ~10min expected.