3Com OfficeConnect Hub TP1200 Информационный лист - Страница 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.

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.

All

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.