The 4-Slot Dock A-7
2325A137REFGD Revision B 2325 Reference Guide
The 4-Slot Dock
The back panel of the 4-Slot Dock has a 25-pin dock-to-host cable
connector and two telephone-style cable jacks: one for “upstream”
communications and one for “downstream” communications. The
upstream side is the side closer to the host; the downstream side is
farther from the host.
Figure A-6 The Back Panel on the 4-Slot Dock
1 Downstream jack, for dock-to-dock cable.
2 Power input jack.
3 Connector for RS-232 host cable.
4
Upstream jack, for RS-422/485 host cable or dock-to-dock
cable.
In a dock network, the first 4-Slot Dock (the one closest to the host) has
a cable running from its upstream jack to the host. The second 4-Slot
Dock has a cable connecting its upstream jack to the downstream jack on
the first 4-Slot Dock. Each additional 4-Slot Dock is connected
similarly. The last 4-Slot Dock in the network has nothing plugged into
its downstream jack.
