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Appendices
B.4. Connecting DB-25F DCE Devices
The DX25M-DCE-RJ Snap Adapter can be used with a Straight RJ-45 cable to attach the
following DB-25F DCE devices to RJ-45 serial ports on the RSM-8R4:
External Modems with DB-25F DCE Serial Port
Other Devices with a DB-25F DCE Console Port
When connecting a DB-35F DCE device to an RJ-45 serial port on the RSM-8R4, please
refer to Figure B.7 and Figure B.8 below:
RJ-45 DB-25M
Pin No. Pin No. Signal
1
2
3
4
5 X
6
7
8
4
20
2
7
3
8
5
RTS
DTR
RXD
TXD
GND
DCD
CTS
Pin 8 Pin 1
Pin 1
Male
Figure B.7: DX25M-DCE-RJ Snap Adapter Interface
RSM-8R4
RJ-45 DCE
Serial Port
Straight
RJ-45 Cable
DB-25F DCE
Serial Port
DX25M-DCE-RJ
Snap Adapter
External
Modem or
Other Device
with DB-25F
DCE Interface
Figure B.8: Connecting DB-25F DCE Devices to an RJ-45 Serial Port on an RSM-8R4
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