t1 slotslotport: Slot number and port number where the channelized E1 or T1 controller is located. number : Channelized E1 or T1 controller number. timeslots: For ISDN, the D channel timeslot,Hey guys, building in the Formd T1 v2.1. I have a 2.5 slot ASUS Proart 4080, and I'm using the Thermalrht AXP90-X53 with Noctua A9x14. I am wondering if I should use 2.5 slot mode