IBM Nortel 10 - Manual (Page 14)

Major components of the GbE switch module
Orange on the release latch on the GbE switch module indicates that the device
can be hot-swapped, which means that you can install or remove this
component while the BladeCenter unit power is turned on. See Chapter 3,
“Installing and removing options,” on page 15 for more information about
installing and removing a GbE switch module.
RS232
TX/RX
LINK 1
TX/RX
LINK 2
TX/RX
LINK 3
TX/RX
LINK 4
3
Release latch
Information panel
RS232 serial
console port
CX4 ports
XFP port
SFP port
4 Nortel 10 Gigabit Uplink Ethernet Switch Module: Installation Guide