CPS-ASM4 INTEGRATED CARD CAGES FOR 3U COMPACTPCI® SERIAL CPS-ASM4 already enables most system platform solutions: Card cages 19" rackmount, 42HP wallmount and 44HP tabletop, with AC or DC Power Supplies, backplanes of different slot count, with system slot right or left, with rear-I/O options for peripheral and system slots.