Data General AViiON 5000 Series, Customer Documentation

Page: 121 / 210

Connecting External Devices to VME Option Boards
4-21
014–001867
Connecting Synchronous Devices to a VSC/3
Controller
A single VSC/3 controller in your system can support three lines, with ports on the
air dam at the rear of the VSC/3 board. Each full-duplex line can support an
RS–232–C synchronous modem or other device. Figure 4–25 shows the location of
the device connectors on a VSC/3 board.
Synchronous device connectors
(female)
AViiON computer — rear view
Figure 4–25 VSC/3 Device Connectors
NOTE: You specify the characteristics of synchronous devices through your
communications software. You should refer to the device-specific
documentation and your X.25, SNA, PAD, or other synchronous
communications documentation for information on setting characteristics,
such as baud rate, to conform to your system requirements.
Synchronous devices connect to the VSC/3 board in your computer through cables
with male DB25 connectors. To connect synchronous devices to the VSC/3 board,
use one of the cables listed in Table 4–6.
Table 4–6 Cables for Synchronous devices and the VSC/3 Board
Cable Part No. Cable Model No. Cable Length (m)
005–32917 15290E006 1.7 (6 ft)
005–32918 15290E015 4.5 (15 ft)
005–32919 15290E025 7.6 (25 ft)
NOTE: Make certain you use the correct cables to connect your synchronous
devices. Although the RS–232–C interface supports many devices, your
device requires the correct cable in order to work properly.