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Appendix D - Cabling the LX-4000 Series
Cabling Considerations
Standard cabling items available from MRV allow you to connect to any serial device that uses male
or female DB-25 or DB-9 connectors. All you need is the appropriate cable (crossover cable for
connecting to a DTE (Data Terminal Equipment) device, straight-through cable for connecting to a
DCE (Data Communication Equipment) device), and the correct modular adapter (male or female DB-
25 connector), which is essentially an RJ-45-to-DB25 adapter.
Serial Device Connectors
The signal assignments of the 8-pin jacks are shown in Figure 23.
Figure 23 - Serial Device Connector (RJ-45) Signal Assignments
Diagnostic Port Connector (Port 0)
The pinout for the Diagnostic Port connector is the same as that of the serial connector.
12345678 1234
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Rj-45 Jack
(Female)
Rj-45 Plug
(Male)
Pin Signal
1 CTS
2 DTR
3 TXD
4 SGND
5 SGND
6 RXD
7 DSR
8 RTS