Bus Node ID Plugs
— They identify the bus nodes of DSSI adapters
in the CPU. Your system has up to four separate Digital Storage
System Interconnect (DSSI) buses, two of which are built into the CPU.
One plug identifies an internal DSSI bus, Bus 0, and the other plug
identifies an external DSSI bus, Bus 1. Both plugs are configured at
the factory. Refer to Section 3.1.1.3 for rules on changing them.
DSSI Bus 1 Connectors
— Labeled X and Y, they let you expand
your system by connecting additional mass storage devices to the
second DSSI (Digital Storage System Interconnect) bus. You can share
the mass storage devices with another system by forming a DSSI
VAXcluster configuration, described in Section 1.3.
Ethernet Connectors
— There are two connectors: a BNC-type
connector for a ThinWire cable and a 15-pin connector for a standard
transceiver cable. The Ethernet connector switch lets you select one or
the other: To select the standard cable, move the switch up. To select
the ThinWire cable, move the switch down. A green indicator light
(LED) for each connector indicates which cable is active.
1–14 System Overview
