Technical data

Page 108 Appendix
Digi RJ-45 to DB-25 Cable Legs
Since most RS-232 devices are equipped with DB-25 connectors, it is necessary to buy or build
an adapter to transfer the signals to a DB-25 plug. The most simple and direct approach is to
purchase ready-made Cable Legs from a Digi International dealer or distributor. These are made
with a full 10-pin RJ-45 plug (which can be difficult to obtain in the retail market), connected via
a two or four foot cable to a DTE-configured DB-25 plug.
RJ-45 TO DB-25 CABLE LEG
RJ-45 - 10 Pin DB-25
Shell
2
3
4
5
6
7
8
20
2
2
Chassis Ground
TxD
RxD
RTS
CTS
DSR
Signal Ground
DCD
DTR
R
I
1
2
3
4
5
6
7
8
9
1
0
RI
DSR
RTS
Chassis Ground
TxD
RxD
Signal Ground
CTS
DTR
D
C
D
Pin PinSignal Signal
Cable Leg Options and Part Numbers
DB-25 Male DB-25 Female DB-9 Male
24 Inch Cables
61020024 61030024 61070024
48 Inch Cables
61020048 61030048 N/A
The pin configuration of the DB-25 connector on the Cable Leg is shown in the diagram.
If you do not need full modem control, you can use one of the many commercially available
RJ-45 to DB-25 adapters. These have both an 8-pin RJ-45 jack and a DB-25 plug in a housing no
larger than that found on a standard DB-25 plug. The plug and jack are connected within the
housing by jumpers, which may be installed by the end-user in any desired configuration.