IBM BladeCenter S Installation And User Manual page 30

Serial pass-thru connector pinout
There are eight pins on each RJ-45 port, numbered 1 through 8, from bottom to
top.
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BladeCenter S Type 7779/8886: Installation and User's Guide
Serial
pass-thru
module
Serial
pass-thru
module
Contact (pin number)
1
2
3
4
5
6
7
8
Release
handle
8
1
Release
handle
Signal name
RTS (Request to
send)
Not used
RXD (Receive data)
GND (Ground)
Not used
TXD (Transfer data) Output from blade server
Not used
CTS (Clear to send)
Signal direction
Output from blade server
n/a
Input to blade server
n/a
n/a
n/a
Input to blade server