HP 24SII - Manual (Page 44)

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NOTE: Ports on the M24SII-V07 module may be individually
configured to communicate with either EIA-232 or EIA-422 (default)
protocol via jumper setting. In addition, you may program individual
ports to use either 8-wire (RJ-45 - default) or 4-wire (RJ-11) cabling.
The type of cabling required for ports on this module is determined by
the Protocol, 4-Wire/8-Wire Operation, and Printer Sharing Mode
(unidirectional or bidirectional) you are using. Please see
Appendix
A.6 for instructions to configure the Protocol on individual ports and
Section 8.8.1 for instructions to program 4-Wire/8-Wire Operation and
set Printer Sharing Mode.
IMPORTANT: Before you proceed with cabling your equipment to
this module, you must verify that your equipment supports either EIA-
232 or EIA-422 protocol. In addition, you must know the connector
type and the pin/signal definitions for your equipment.
Ports on the M24SII-V07 module have RJ-45 (8-wire) connectors
which also accept RJ-11 (4-wire) connectors. Most serial computers,
modems, and printers do not have RJ-45/RJ-11 modular connectors.
Therefore, adapters are required to convert from either DB-25 or DE-9
connectors to modular connectors. BayTech has a complete line of
RJ-45/RJ-11 adapters and cables that will make your installation quick
and trouble free. Please see
Appendix A.7 for adapter pinouts as well
as recommended cabling. Figure 7 and Figure 8 on Page 34 are
drawings of an RJ-45 receptacle and plug.
There are several possible pin/signal definitions depending upon how
you have configured the 4-Wire/8-Wire Operation (8-wire or 4-wire),
Printer Sharing Mode (unidirectional or bidirectional), and the Protocol
(EIA-232 or EIA-422).
If you will be using 8-wire Operation, please see see Section 5.5.1 .