Preparing a replacement system board
8-8
014–002250–01
P8
P9
P2
Indicates jumper
installed
Indicates jumper
removed
Synchronous
operation jumpers:
P6
P5
P4
P3
P10
PROM component
DCD
Indicates jumper
stored
Figure 8–9
Location and default configuration of AViiON 5500 and 550 series system
board jumpers
6. Verify the position of Data Carrier Detect (DCD) jumpers for the
asynchronous serial ports:
P8
,
P9
, and
P2
. These jumpers enable or
disable ASCII terminal operation for the three asynchronous ports.
To use an asynchronous port for ASCII terminal operation with the
DG/UX
operating system, the DCD jumper must be installed. By
default, only jumper
P8
is installed, enabling the system console
port (
OPCON
), for Data Carrier Detect (DCD).
To configure the third async port (
RS232–C
)
for data terminal
operation, install a jumper on
P2
. The DCD jumper for the AV/Alert
service port (
RS232–B
)
is
P9.
Содержание AViiON 5500 Series
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