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Media Dependent Adapters (MDAs)
893-01010-A B-3
10/100BASE-TX MDA
The optional expansion slot can be used for a 10/100BASE-TX MDA that
supports autonegotiation for either 10 Mb/s or 100 Mb/s operation, depending on
the connecting device. For more information about autonegotiation, see
“
Connecting the 10/100BASE-TX Port” on page 2-9.
The MDA, shown in Figure
B-2, provides one 10/100 Mb/s port and its associated
LEDs. The LED indicators are described in T
able B-2. Because this port is
capable of operating at 100 Mb/s, Bay Networks recommends that only Category
5 UTP cabling be used for connections to the RJ-45 port connector (see T
able 1-1
on page
1-5 for RJ-45 pin assignments).
The 10/100BASE-TX port also supports operation in full- and half-duplex mode.
In full-duplex mode, the aggregate transfer can be either 20 Mb/s or
200 Mb/s (for simultaneous transmit and receive at 100 Mb/s each) depending on
the speed of the connecting device. In half-duplex mode, the transfer speed is
either 10 Mb/s or 100 Mb/s (transmit or receive).
1 = Status indicators
Link–valid communication link established
100–port operating as 100BASE-TX
F Dx–port operating in full-duplex mode (LED lit) or half-duplex mode (LED off)
2 = 10/100BASE-TX RJ-45 connector
Figure B-2. 10/100BASE-TX MDA
MTX-1
100BASETX
Link
100
F Dx
897EA
1
2
89301010.BK Page 3 Tuesday, June 10, 1997 8:00 PM