2011 Maipu Communication Technology Co., Ltd, All Rights Reserved
Appendix
Appendix 1 Diagnosis of the common faults
Faults Possible cause Solutions
All indicators are not on
when the electric power is
on
Power connection error or
abnormal power supply
Check power wire and electrical
outlet
Link/Active indicator is off
Cable damaged; use wrong
type of cable; cable is
beyond permitted length;
poor contacted cable; the
other end of the connection
work abnormally
Change cable; reconnect cable;
check the working of the other end
Link/Active indicator is on
but the network is
unreachable
Working mode of switch
and Ethernet terminal does
not matched; network
configuration error
Change working mode of Ethernet
interface to match each other of to
be auto-negotiation; check network
configuration, including
configuration of switch and the other
end
All Link/Active indicators
are on but network
deamplificational speed
or unreachable
Broadcast storm
Check if there is the ring and
reasonably allocate the network;
check if there is plenty broadcast
packets
Stop working after
normally working for a
certain time
Power error; overheat;
program works abnormal
Check the power connection and the
voltage; check the environment and
air ventilator is unblocked; reboot
the switch after the electric power is
on
Appendix 2 Terms
Terms Description
Backbone
Part of a network that acts as the primary path for traffic that
is most often sourced from, and destined for, other networks.
Bandwidth
The difference between the highest and lowest frequencies
available for network signals. The term also is used to
describe the rated throughput capacity of a given network
medium or protocol. The frequency range necessary to
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