HP PCI Multiplexer Family Cabling, Diagnostics, and Troubleshooting Manual

Overview
PCI MUX 64 Card
Chapter 1 17
PCI MUX 64 Card
Figure 1-1 illustrates a Mux 64 Card. There are actually two versions of
the PCI Mux 64 card, J3593A is only for 5 Volt systems, and A6749A
works with both 3.3 Volt and 5 Volt systems. These cards are capable of
controlling the operation of up to 64 high speed serial ports.
Figure 1-1 PCI MUX 64-Port Card