got a odd one. dk280 with 1 exp cab. digital sets. t1 lines coming in the switch as single co lines. customer has about 10 lines. incoming calls get dropped when answered. most calls come in on the first several lines. they tell me it happens mostly in the morning. the day i was there it happened only once before i got there. co line milliamps check ok. anyone else had to solve a problem like this. at presant i have traded l-2 with l-9 using differant co cards.