Equinox Systems Megaport SS Serial I/O Board Series Hardware Installation & Reference Manual page 25

Modular Wiring
Modular Splitter
Port to Device Cabling
Figure 3-8. Internal wiring for DTE distribution panels
Modular splitters are used with modular adaptors and modular cable.
Modular splitters convert the 50-pin connector to a set of 12 modular
jacks. Figure 3-5 illustrates devices connected to the Megaport using
the modular splitter.
The modular splitter (Equinox part number 210016) converts the
signals on the 50-pin connector to 12 RJ-11 modular jacks. (Two
modular splitters are required to connect 24-devices.) This splitter
should be used to connect to ports only.
Either 4 or 6-wire modular cable may be used to attach devices to
the splitter. The outer two wires which support control signals are
omitted when using 4-wire cables. Standard modular cables used
for telephones are always reversing (e.g. pin 1 is connected to pin
4, etc.) and are typically 4-wire. If a user supplied modular cable
is used, make sure the cable is reversing (see paragraph heading
Modular Cables).
Modular adaptors convert modular jacks at the end of modular
cables to DB-25 RS-232 connectors. One adaptor for each device
to be connected is required.
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