3Com OfficeConnect Dual Speed Hub 16 Технічний паспорт - Сторінка 3
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Technology Explained
Ethernet
Since its inception, Ethernet has
become the most popular topology in
local area networks. Based on the IEEE
802.3 standard, Ethernet has evolved
over the years and now supports a range
of media and significant enhancements
that the original standard never did.
The 10 Mbps available bandwidth can
be either shared across a number of
users using hubs or dedicated to work-
stations using switched technology.
OfficeConnect Hubs and
Switches at a Glance
Ethernet Hubs
OfficeConnect Hub TP4
OfficeConnect Hub TP4Combo
OfficeConnect Hub 8/TPO
OfficeConnect Hub 8/TPC
OfficeConnect Hub TP16C
OfficeConnect Hub 8/TPM
Fast Ethernet Hubs
OfficeConnect Hub TP400
OfficeConnect Hub TP800
OfficeConnect Hub TP1200
OfficeConnect Dual Speed Hub 8
OfficeConnect Dual Speed Hub 16
Fast Ethernet Switches
OfficeConnect Switch 400
OfficeConnect Switch 800
OfficeConnect Switch 1600
OfficeConnect LED Indicators
Alert LED
(orange)
Packet LED
Alerts you to
(OfficeConnect
excessive net-
Hub TP4, 8/TPO,
work use or
Power LED
TP400 only)
an isolated
(green)
(yellow)
(partitioned)
Indicates that
Flashes each
10BASE-T port
the power
time a packet
and 100BASE-TX
supply to the
is received on
port.
unit is present.
a port.
Fast Ethernet
Fast Ethernet was designed to deliver
higher levels of performance to band-
width-intensive resources such as
servers and high-performance users.
Fast Ethernet is based on the Ethernet
standard yet runs at 10 times the speed
(100 Mbps). It is now one of the most
popular high-speed technologies
because of its cost effectiveness,
stability, and compatibility with
existing Ethernet LAN environments.
Fast Ethernet switching allows dedi-
cated performance between two devices.
4
4
1
1
8
8
1
16
1
8
1
4
8
12
Port Status LEDs (green/yellow)
Indicate the status of each port. If
Collision LED
green, the link between the port and
(yellow)
the next piece of network equipment
Flashes each
is functional. If nothing is connected,
time a collision
the LED will be off. If yellow, the port
is detected on
has partitioned due to a fault on that
the network.
segment. The coaxial port LED
Collisions are
(where applicable) can only be
part of normal
yellow or off. It will be yellow if the
network
port has partitioned or when the
operation.
port is not terminated.
10/100 Mbps Ethernet/
Fast Ethernet
This combines both conventional
10BASE-T and high-speed 100BASE-
TX support in one device. The unit
automatically senses the speed of
the connected end device (either
10 Mbps or 100 Mbps) and channels
the data through at the appropriate
speed. It is one of the most economical
and flexible ways to add bandwidth
immediately to congestion areas, while
maintaining the option for migrations
to higher bandwidth in the future.
8
16
4
4
All
8
16
As this front view of the
OfficeConnect Hub
8/TPC illustrates, each
Network
OfficeConnect unit
Utilization LEDs
offers a variety of LED
(green/yellow/
indicators, including
orange)
Indicate how
an Alert LED to allow
much your
quick monitoring of
network is
hub and network
being used.
activity. The Alert LED
gives users immediate
notification of prob-
lems, such as excessive
network use, without
requiring special
technical knowledge.
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