3 fast ethernet, 4 auto-negotiation – Planet Technology FNSW-1601 User Manual

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4.3 Fast Ethernet

100Base-TX and 100Base-FX are called "Fast Ethernet." This
is because they use the Ethernet CSMA/CD access rules and
data packet structure, but data travels ten times faster
(100Mbps) than traditional 10Mbps Ethernet.

Below is a list of the cable types and connectors that supported
by Fast Ethernet

Switch

models for

10Base-T

, 100Base-TX, and

100Base-FX networks.

PORT TYPE

Cables Type

Connector

100B

ASE

-TX

Cat. 5 UTP only

RJ-45

10B

ASE

-T

Cat.3, 4, 5 UTP

RJ-45

Table C: Cables & Connectors Supported by the Switch

In many cases, 10Base-T LANs can quickly and easily upgrade
to 100Base-TX networks.

4.4 Auto-Negotiation

The 100Base-TX ports on the Fast Ethernet Switch have
built-in "Auto-Negotiation". This technology automatically sets
the best possible bandwidth when a connection is established
with another network device (usually at Power On or Reset).
This is done by detect the mode and speed at the second de-
vice is capable of. The 100Base-TX devices can connect with
the 100Base-TX port in either Half- or Full-Duplex mode.

If attached device is:

100Base-TX port will set to:

100Mbps, no auto-negotiation

100Mbps
(100Base-TX, Half-Duplex)

100Mbps, with auto-negotiation 200Mbps

(100Base-TX, Full-Duplex)

10Mbps, no auto-negotiation

10Mbps
(10Base-T, Half-Duplex)

10Mbps, with auto-negotiation

20Mbps
(10Base-T, Full-Duplex)

Table D: Speed & Duplex mode detected by the switch

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