3Com CoreBuilder 3500, Getting Started Manual

Page: 35 / 96

Fast Ethernet Modules 35
10/100BASE-TX Port Pin Assignments
Table 9 shows the port pin assignments for the
10/100BASE-TX port.
Fiber and Laser Safety Precautions
The 100BASE-FX Fast Ethernet modules, Gigabit
Ethernet modules, and FDDI modules use
light-emitting diodes (LEDs) and lasers in their
fiber-optic ports. To ensure your safety when you
install or work with these modules, comply with the
precautions in this section.
WARNING: The LEDs and lasers used in these
modules meet the regulatory requirements for casual
exposure to the eye. As with any source of bright
light, however, 3Com recommends that you do not
look into the LED or laser light source.
IEC 825, Class 1 LED devices are for connection only
to Class 1 LED devices.
IEC 825, Class 1 Laser devices are for connection only
to Class 1 Laser devices.
Table 9 10/100BASE-TX Port Pin Assignments
Pin No. Signal Description
1 RD + Receive Data +
2 RD – Receive Data –
3 TD + Transmit Data +
4 Not used
5 Not used
6 TD – Transmit Data –
7 Not used
8 Not used
CLASS 1
LED PRODUCT
CLASS 1
LASER PRODUCT