3Com 3C16954, User Manual

Page: 25 / 54

Choosing the Correct Cables 25
Choosing the
Correct Cables
All of the ports on the front of the Switch 610 are configured as MDIX
(cross-over). If you want to make a connection to another MDIX port, you
need a
cross-over cable. Most of the 10BASE-T and 100BASE-TX ports on
3Com devices are MDIX-only. Many ports on workstations and servers are
configured as MDI (straight-through). If you want to make a connection
to an MDI port, you need to use a standard
straight-through
cable. This is
illustrated in Figure 8 .
Figure 8 Connecting other devices to the Switch 610
Solving Problems
Indicated by LEDs If the LEDs on the Switch indicate a problem, refer to Table 5 which
contains a list of possible problems and suggested solutions.
Table 5
Problems indicated by LEDs
Problem Suggested Solution
A Power LED does not
light Check that the power cable is firmly connected to the
relevant Switch unit and to the supply outlet. If the
connection is secure and there is still no power, you may
have a faulty power cord.
On powering-up, the
Power/Self Test LED
lights yellow and a
Unit LED lights green The relevant Switch unit has failed its Power On Self Test
(POST) because of an internal problem. Contact your
supplier for advice.
16954ua.book Page 25 Friday, April 30, 1999 9:39 AM