I need to add a NTP source to UCM 6.0. I have 1 pub and 2 subs in the cluster. I currently have the pub pointing to itself for NTP source & the subs are pointing to the pub. I need to sync UCM with our LAN NTP source so the PC's & IP Phones have the same time. Do I need to create a new Phone NTP Reference and point that to the date/time group? Or should I just change the NTP source at the OS administration level? Please advise. Thanks! Jaime