Network Controllers - DEC 4000 Model 200 Operation Manual

• KMV1A—Programmable communications interface, Q-bus controller
Before using a synchronous controller you must verify the following:
• The system you want to communicate with has an appropriate
synchronous controller.
synchronous controller on both the transmitting and receiving system.
• Both the transmitting and receiving systems must have supporting host
software installed. Synchronous communications operate under specific
protocols that define how data is interpreted. Two common protocols
are X.25 and PSI. Appropriate host software is required to interpret
the protocol.

3.2.3 Network Controllers

NOTE: VAX 4000 systems contain an Ethernet controller embedded in the
CPU module. You can have a second optional Ethernet controller, the
DESQA module, included with your system.
Before using a network controller you must do the following:
1. Make sure the Ethernet cable (either standard transceiver cable or
ThinWire cable) is connected to the CPU cover panel (or optional
DESQA module).
indicating an active connection. If not lit, move the Ethernet Connector
switch to the proper position.
2. Make sure the Ethernet cable is properly connected to the network. A
transceiver cable can be connected in one of the following ways:
• To an H4000 or H4005 transceiver located on a traditional Ethernet
• To a local network interconnect (DELNI), which can be connected
to a larger Ethernet or can serve to connect up to eight systems in
a local area network
A ThinWire cable can be connected as follows:
• To a ThinWire Ethernet multiport repeater (DEMPR) or ThinWire
single port repeater (DESPR), which can be connected to a larger
Ethernet or can serve to connect many systems in a local area
network
• To an available connection on a T-connector of other ThinWire nodes
3. Have the DECnet application installed on your system.
4. Register your node with the network manager so that your node is
recognized by other systems in the network.
Synchronous communications require a
The light next to the connector should be lit,
Operating the System Options 3–41