Bay Technical Associates BayStack 303 User Manual

Introduction to the BayStack 303 and 304 Ethernet Switches

893-01010-A

1-5

 

Both the BayStack switches have one built-in and one optional 10/100BASE-TX 
port that is designed to operate either at 10 Mb/s or at 100 Mb/s depending on the 
connecting device. This port supports the IEEE 802.3u autonegotiation standard, 
which means that when this port is connected to another device that also supports 
the IEEE 802.3u autonegotiation standard, the two devices negotiate the best 
speed and duplex mode of operation. 

The 10/100BASE-TX port also supports half- and full-duplex mode operation. 
For more information on autonegotiation, see 

” on 

.

The 10/100 Mb/s port consists of a standard 8-pin modular RJ-45 connector used 
to connect hubs, switches, and end stations using only 2-pair Category 5 UTP 
cabling. 

The link status indicator for the 100BASE-TX port is located on the LED panel on 
the front of the switch. This area also contains a full-duplex (F Dx) status 
indicator that lights when the port is operating in full-duplex mode. When the port 
is operating in half-duplex mode, the indicator is off. See 

 for more information on duplex mode. 

1

Receive data + (RD+)

2

Receive data –(RD–)

3

Transmit data + (TR+)

4

Not used

5

Not used

6

Transmit data– (TD–)

7

Not used

8

Not used

1

8

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89301010.BK  Page 5  Tuesday, June 10, 1997  8:00 PM