HP EISA/PCI Multiplexer Family Cabling, Diagnostics and Troubleshooting Manual

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Port to Device Cabling
DB-25 Port Module
The pinouts for connectors on the DB-25 port modules are identical
(Figure 4-2).
Figure 4-2 DB-25 connector pinouts
Device Wiring
Device wiring is dependent on the specific signal requirements of the
system peripheral devices. Cable connectors plugged into the DB-25 port
module ports must have a male DB-25 connector. The connector on the
opposite end of each cable should mate to the peripheral device port
(terminal, printer, personal computer or modem).
Depending on the specific signal requirements of the system peripheral
devices, 3-, 4-, or 7-wire connections can be made. Figures 4-3 through
4-5 show the cable configurations for these connections. Figure 4-6 shows
the pinouts for a modem cable.