Network Controllers - DEC VAX 4000 300 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 console module (or optional DESQA
module). The light next to the connector should be lit, indicating an
active connection. If not lit, move the Ethernet Connector switch to the
proper position.
Synchronous communications require a
Operating the System Options 3–41