No cut-off is expected for the lines that are properly configured.
Update(s):
Date: 2014-03-19 16:02:58 UTC After having successfully moved the IP, we will now update the DNS entry of sip.ovh.net.
Date: 2014-03-19 00:31:11 UTC We switched the ip of sip.ovh.net.
Phones are reconnecting. We will keep monitoring if everything is working properly.
Date: 2014-03-19 00:30:20 UTC We will start the operation.
Date: 2014-03-18 22:43:21 UTC We will switch the ip sip.ovh.net directly to the SIP proxy server, no edge effect is expected on the equipment properly respecting the SIP protocol with pre-registration with a NAT device keeping the same communication ports as those used for registration.
Date: 2014-03-18 16:49:54 UTC The intervention will take place around midnight March 18th/19th.
Date: 2014-03-13 19:50:25 UTC The migration will be done during the nights of 18th till the 19th March.