Little help decoding please?

[foned00d]

I pretty much understand what this means, but how can I tell which PN's are having the issue?

Event Event Event Event First Last Evnt
Type Description Data 1 Data 2 Occur Occur Cnt



2331 No VOIP channel, PN <--> 2002C11 3AB7 07/12/06:16 07/15/11:36 253
2331 No VOIP channel, PN <--> 2C0F 1AF9 07/12/13:21 07/16/11:04 255
2331 No VOIP channel, PN <--> 2C10 1B56 07/14/07:35 07/16/11:05 255
2331 No VOIP channel, PN <--> 2002C02 3D5 07/14/07:35 07/15/11:42 255