Scheduled Service Change: Leap second - Reboot of PBX Servers.
Telephony services will be unavailable for a few minutes if the servers reboot.
There is no workaround for this issue
Due to a leap second being added at the end of June 2015, the PBX servers may need to reboot. If they do, voice services will be unavailable for several minutes until the servers are back up.
CIT TDX ID: