Equinox Systems Megaport SS Serial I/O Board Series Hardware Installation & Reference Manual page 24

DB-25 Wiring
DB-25 Distribution
Panels
Distribution Panel
Internal Wiring
3-6
Distribution panels convert 50-pin connectors to twelve DB-25 RS-
232 connectors (see Figure 3-4). One distribution panel or fan-out
cable is required for 12 devices. Two are required for 24 ports.
The following distribution panels are available from Equinox:
Part No.
990117
990121
990122
Figures 3-7 and 3-8 illustrate the internal wiring for both DCE and
DTE distribution panels, respectively.
Figure 3-7. Internal wiring for DCE distribution panels
Equinox Megaport SS Board Series Hardware Manual
DB-25 Connector
12 DCE female
12 DTE male
12 DTE female
Connect To
terminals and
DTE devices
modems
male DCE
devices