53
12.2.1 RJ45 to DB25
If you are connecting an RJ45 port to a DTE device (such as a terminal) that has a DB25
connector, you will need to use an RJ45-DTE DB25 adapter. To connect an RJ45 port to a
DB25 connector on a DCE device, you will need an RJ45-DCE DB25 adapter. The pinout
information for both connections is shown in Figure 12-3.
Figure 12-3:
Pinouts of RJ45-DB25 Connections
The arrows in Figure 12-3 represent the direction of the signal. The pinouts assume that the
8-conductor cable connecting the Terminal Server and the adapter block is a swapped
cable. Both the transmit and receive ground signals on the Terminal Server connector are
wired to the signal ground on a DB25 adapter.
Figure 12-4:
RJ45 to DCE DB25 Adapter
RJ45
Serial
Port
Cable
6
5
4
3
2
6
5
4
8
7
3
2
1
DTR
RX+
TX+
RX-
TX-
(out)
(out)
(in)
DSR
(in)
CTS
(in)
RTS
(out)
1
2
3
4
5
6
DCD
TXD
SG
RXD
DTR
RJ45-DB25
Adapter
RJ45
DB25
7
8
RTS
CTS
5
8
3
7
2
20
4
3
4
5
1
2
6
7
8
6
5
4
8
7
3
2
1
(Server)
(modem)
DCE - DB25 Adapter Pinout
Summary of Contents for 16-Port Rackmount 10/100
Page 90: ......
