
U.S.
Patent
Modular
Porl
Dam
RX
Dam
TX
Control
IN
signals
shown
Jun.
19,
2007
Sheet
13
0f
19
US
7,233,601
B1
53
51
Up
Port
T“)
Data
Data
Comrol
Not
all
m
v
Up
Port
LinkSlalus
54
/V
‘
if
a
é’
TE:
Down
Port
2°
2:
LinkSl'atus
‘
A
Down
TX
~
MQdUIaY
Port
Multiplexer
N54
LmkStarus
52
/V
Data
Data
Control
RX
TX
IN
Down
Port
FIG.17
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