We have switched the office over to the new call server, and I have managed to set up the billing system to produce itemised bills with PDF and XML nicely. We have switched most incoming calls over to the new server this weekend too.
I think I can guess the next issue we'll have - and that is people knowing they are on hold.
Now, if the person on hold has a SNOM - they see on the screen they are on hold.
If the person on hold is one of our mobiles they also know, and have a nice voice saying so.
But normal PSTN calls just get silence, which is a bit of a shame. I can see I am going to have to stream some sort of hold music, beep, or message. Oh joy...
Should not take too long though.