1: oh, yeah, 3 bytes.. anyway, it's not hard to store data for all the phones in the LATA 2: It keeps track of "Incomming call", "Hangup" and "Dialouts" 1: The PBX's I've seen only have SMDR for long distance numbers 2: And as of sometime early this year, not sure when it happened... Even out of town numbers are traced. 2: Dunno about some of the smaller ones, but BELL and ROLM both monitor ALL. Goes on a special monitor port to a archiving PC.