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TERMINAL SERVERS
RJ-45 to DB25/DB9 (DCE) Conversion
The following table describes the cable wiring required for connecting a DCE
device with an RS-232, DB25 port (such as a modem) to a Terminal Server’s
RJ-45 serial port.
Table 3-6. RJ-45 to DB25/DB9 (DCE) Conversion.
RJ-45 Pin
RJ-45 Signal Name
DB25 pin
RS-232
DB9 pin
1*
Clear to Send (CTS)
5
CTS
8
2*
Data Terminal Ready (DTR) 20
DTR
4
3
Transmit (TX+)
2
XMT
3
4
Transmit Return (TX-)
7
GND
5
5
Receive Return (RX-)
7
GND
5
6
Receive (RX+)
3
RCV
2
7*
Data Set Ready (DSR)
6
DSR
6
8*
Request to Send (RTS)
4
RTS
7
The pins marked with an asterisk (*) are required only for modem-control
or for flow-control, so you may ignore these pins when connecting a terminal.
For applications requiring DTR handshaking or for printers that use pin 11
for Printer Busy Signals, connect RJ-45 pin 1 (CTS) to DB25 pin 20 (for DTR)
or pin 11 (Printer Busy), respectively.
Summary of Contents for LE2101A-BT-R2
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