Compaq AlphaServer GS60 Operation Manual page 65

Three modular jacks to the right of the control panel allow power control/status
connections to the left expander cabinet, right expander cabinet, and I/O connections to
a serial console terminal. This serial console terminal modified modular jack is keyed
so that an expander cabinet connector cannot be plugged into its jack.
The system cabinet has four quadrants in the bottom of the cabinet.
For OpenVMS and DIGITAL UNIX systems, a PCI or Futurebus+ PIU can be
installed in any of the four quadrants. An XMI PIU requires two quadrants, with the
I/O modules in front and the I/O bulkhead supplying I/O connectors in the back (see
Figure 3-8).
For Windows NT systems, a PCI PIU can be installed in any of the quadrants. A PCI
PIU (DWLPB only) with a KFE72 adapter must be installed off of hose 1 (not hose 0)
of the KFTHA or KFTIA installed in slot 8 of the TLSB. (A graphics monitor,
keyboard, and mouse, required for Windows NT systems, are connected to the KFE72.
Connectors for two serial ports and a parallel port are also supplied with the KFE72.)
AlphaServer 8400 System 3-17