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From the command line use the command:
> set deviceport port n reversepinout disable
where 'n' is the number of the deviceport you want to modify.
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Two diagrams are presented for each application below, one for an RJ45-RJ45 straight-through cable to an RJ45/DB9 or RJ45/DB25 "hood" adapter, the other for a cable with an RJ45 on one end and a DB9 or DB25 connector on the other end.
To connect a DB25 terminal to an RJ45 port, use the following cable and adapter:
Cable 200.2067A Adapter
RJ45 (Straight) RJ45 DB25 Signal
RTS 1 1-------------1 1-------------5 CTS
DTR 2 2-------------2 2-----|-------6 DSR
|-------8 DCD
TX+ 3 3-------------3 3-------------3 RXD
SGD 4 4-------------4 4-----|
SGD 5 5-------------5 5-----|-------7 Signal Ground
RX+ 6 6-------------6 6-------------2 TXD
DSR 7 7-------------7 7-------------20 DTR
CTS 8 8-------------8 8-------------4 RTS
For a straight cable with RJ45 on one end and DB25 on the other:
RJ45 DB25
RTS 1 -------------- 5 CTS
DTR 2 --------|----- 6 DSR
|------8 DCD
TX+ 3 -------------- 3 RXD
SGD 4 --------|
SGD 5 --------|----- 7 Signal Ground
RX+ 6 -------------- 2 TXD
DSR 7 -------------- 20 DTR
CTS 8 -------------- 4 RTS
To connect a DB9 terminal to an RJ45 port, use the following cable and adapter:
Cable 200.2070A Adapter
RJ45 (Straight) RJ45 DB9 Signal
RTS 1 1-------------1 1-------------8 CTS
DTR 2 2-------------2 2-----|-------6 DSR
|-------1 DCD
TX+ 3 3-------------3 3-------------2 RXD
SGD 4 4-------------4 4-----|
SGD 5 5-------------5 5-----|-------5 Signal Ground
RX+ 6 6-------------6 6-------------3 TXD
DSR 7 7-------------7 7-------------4 DTR
CTS 8 8-------------8 8-------------7 RTS
For a straight cable with RJ45 on one end and DB9 on the other:
RJ45 DB9
RTS 1 -------------- 8 CTS
DTR 2 ---------|---- 6 DSR
|-----1 DCD
TX+ 3 -------------- 2 RXD
SGD 4 ---------|
SGD 5 ---------|---- 5 Signal Ground
RX+ 6 -------------- 3 TXD
DSR 7 -------------- 4 DTR
CTS 8 -------------- 7 RTS
RJ45 modem pinout:
To connect a DB25 modem to an RJ45 port, use the following cable and adapter:
Cable 200.2073 Adapter
RJ45 (Straight) RJ45 DB25 Signal
RTS 1 1-------------1 1-------------4 RTS
DTR 2 2-------------2 2-------------20 DTR
TX+ 3 3-------------3 3-------------2 TXD
SGD 4 4-------------4 4-----|
SGD 5 5-------------5 5-----|-------7 Signal Ground
RX+ 6 6-------------6 6-------------3 RXD
DSR 7 7-------------7 7-------------8 DCD
CTS 8 8-------------8 8-------------5 CTS
For a straight modem cable with RJ45 on one end and DB25 on the other:
RJ45 DB25
RTS 1 -------------- 4 RTS
DTR 2 -------------- 20 DTR
TX+ 3 -------------- 2 TXD
SGD 4 ----------|
SGD 5 ----------|--- 7 Signal Ground
RX+ 6 -------------- 3 RXD
DSR 7 -------------- 8 DCD
CTS 8 -------------- 5 CTS
To connect a DB9 DCE device to an RJ45 port, use the following cable and adapter:
Cable 200.2071 Adapter
RJ45 (Straight) RJ45 DB9 Signal
RTS 1 1-------------1 1-------------7 RTS
DTR 2 2-------------2 2-------------4 DTR
TX+ 3 3-------------3 3-------------3 TXD
SGD 4 4-------------4 4-----|
SGD 5 5-------------5 5-----|-------5 Signal Ground
RX+ 6 6-------------6 6-------------2 RXD
DSR 7 7-------------7 7-------------6 DSR
CTS 8 8-------------8 8-------------8 CTS
For a straight modem cable with RJ45 on one end and DB9 on the other:
RJ45 DB9
RTS 1 -------------- 7 RTS
DTR 2 -------------- 4 DTR
TX+ 3 -------------- 3 TXD
SGD 4 ----------|
SGD 5 ----------|--- 5 Signal Ground
RX+ 6 -------------- 2 RXD
DSR 7 -------------- 1 DCD
CTS 8 -------------- 8 CTS
On Lantronix products other than the SLC8000 when looking at the RJ45 socket with the notch for the locking
tab facing down the pins are numbered 1-8 left to right:
12345678
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By default the SLC8000 pinout is reversed, 8-1 left to right so that Cisco and Sun equipment may be connected with a common straight-through RJ45 patch cable, e.g. an Ethernet cable.:
87654321
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On SLC8000s this pinout can be switched back and forth between reversed and non-reversed. See the note at the beginning of this article.
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