You mentioned you are clocking to the CO PRIs at each location - if you do a dt r on the PRIs are you seeing any errors at the time of the activity switch? Hope this doesn't sound stupid, but are both PBX's in the same timezone, or atleast in different timezones so that 1:15 on one PBX is not equal to 2:15 on the other? And is the time set correctly on each?