Compaq AlphaServer GS60 Operation Manual page 79

The interface from the AlphaServer 8200 and 8400 system bus to I/O is provided by
two types of I/O adapter modules, the KFTHA and the KFTIA. The KFTHA has four
channels, or hoses, to connect to I/O devices (see Figure 4-1). The KFTIA has one
internal hose (an integrated PCI bus) and one hose to connect to external I/O.
I/O Subsystems 4-3