Airwave server Planned outage
The airwave service will be unavailable on Thursday, February 7, 2013 from 11:05 p.m. until 6:00 a.m. on Friday, February 8, 2013, due to a software upgrade. Service should be restored by 6:00 a.m.
Story added 6. February 2013, content source with full text you can find at link above.