we do. what's a tel file? Feehan, Stephen Sent by: 03/18/2005 11:05 AM Please respond to icu-pcb-forum@xxxxxxxxxxxxx To "'icu-pcb-forum@xxxxxxxxxxxxx'" <icu-pcb-forum@xxxxxxxxxxxxx> cc Subject [PCB_FORUM] Auto Generate Differential Pairs Anyone using the auto generate diff pairs in version 15.2 instead of driving them from the schematic (viewlogic/cms)? If yes, how are you handling all the add/delete diff pairs when importing new tel files? Regards, Stephen Feehan Siemens Communications, Inc.