Unrelated to the s/w update this morning, one of our LNSs (Y.Witless) reset at 06:40 today causing a small number of lines to reconnect. Lines had reconnected by 06:45. As a precaution we have taken Y.Witless out of service - new connections won't connect to Y.Witless and we'll move lines off it overnight tonight.
This reboot was caused by over zealous monitoring of one of the power rails, which triggered a hardware reset. This has been fixed in later software, which will be applied during an emergency maintenance window tonight.