Bay Technical Associates BayStack 303 User Manual

Page of 101
Using the BayStack 303 and 304 Ethernet Switches
2-10
893-01010-A
The indicator for the built-in 100BASE-TX port is located on the LED panel on 
the right of the front panel. The indicator for the MDA port is located on the 
MDA. When the half- and full-duplex indicator is lit, the port is operating in 
full-duplex mode (meaning the port is operating at either 20 Mb/s or 200 Mb/s, 
depending on the connecting device). When the indicator is not lit, the port is 
operating in half-duplex mode, which is 10 Mb/s or 100 Mb/s. 
Autonegotiation
The fixed 10/100 Mb/s port and the optional 10/100BASE-TX MDA port support 
the IEEE 802.3u autonegotiation standard. When autonegotiation is enabled on 
the switch and the port is connected to a device that also supports the standard, the 
two devices negotiate the best speed and duplex mode of operation. All the 
high-speed ports on the BayStack 303 and 304 switches support full-duplex. For 
more information on autonegotiation, see 
.
Note: 
The 100BASE-FX MDA port operates in 100 Mb/s (half-duplex mode) 
or 200 Mb/s (full-duplex mode) only. 
89301010.BK  Page 10  Tuesday, June 10, 1997  8:00 PM