You must install one SCB in the firewall as part of a host subsystem. The SCB installs horizontally into the slot at the bottom of the card cage labeled 0. If You must install one SCB in the firewall as part of a host subsystem. The SCB installs horizontally into the slot at the bottom of the card cage labeled 0. If การติดตั้งเกิดปัญหาหรือตำแหน