Installation Procedures
2.3 Installing the BA42B System
2.3.2.3 Connecting the ThinWire Terminator or Loopback Connector
You can connect the VAX 4000 Models 100A/105A to either a ThinWire
Ethernet network or to a standard Ethernet network. To test the Ethernet
circuitry in the system before you connect to a network, install either the
ThinWire terminator or the standard Ethernet loopback connector.
The ThinWire terminator and the standard Ethernet loopback connector are
supplied with BA42B systems (see Figure 2–2). The ThinWire terminator
consists of a T-connector and two end terminators. The standard Ethernet
loopback connector is a single unit.
You choose the network type using the Ethernet switch on the back of the
system (see Figure 1–2). The switch settings for the network types are as
follows:
• Right position—ThinWire Ethernet
• Left position—standard Ethernet
When you want to use a ThinWire Ethernet network, follow these steps:
1. Set the Ethernet switch to the right position.
2. To form a ThinWire terminator, connect the two terminators (see
Figure 2–11) to the T-connector.
3. Connect the ThinWire terminator to the ThinWire Ethernet port on
the back of the system by pushing in and turning the barrel connector
clockwise until it locks (see Figure 2–11).
2–20 Installation Procedures
