Digi PortServer II

90030500B Installation Page 35
Connecting PortServer II to serial devices
General
Each of PortServer II’s serial ports is provided with an RJ-45 10-pin jack socket. You
can connect a serial device to the port using a cable terminated with any of the follow-
ing plugs:
• Eight pin RJ-45 plug
• Ten pin RJ-45 plug
• Four pin RJ-11 plug
• Six pin RJ-11 plug
The RJ-45 plugs are the same physical size, but the ten pin version has one additional
wire at each end of the row of contacts. Thus pins 1 through 8 of the eight pin version
correspond to pins 2 through 9 of the ten pin version.
Similarly, the RJ-11 plugs are the same size, but the six pin version has two extra pins
at either end.
RJ-11 plugs are smaller than RJ-45 plugs, but are designed to fit into the center of an
RJ-45 socket. The pins are assigned from the center and are always in the same loca-
tion, regardless of the size of plug. For example, the pins of a six pin RJ-11 plug carry
the same signals as the center six pins of an eight or ten pin RJ-45 connector.
Caution!
If you insert an RJ-11 plug into an RJ-45 connector, take care to align
the pins correctly.
The wiring of the various plug types is shown on the following pages: