Network
Connection
Preparation
Ethernet Connections
The
maximum
distances
for
Ethernet
network
segments
and
connections
depend
on
the type of
transmission
cable
used The
unshielded
twisted-pair
UTP
cabling
used
with
lOBaseT
is
suitable
for voice
transmission
but
may
incur problems
at
lO-Mbps
data rates
UTP
cabling
does
not require
the
fixed spacing
between
connections
that
is
necessary
with the coax-type
connections
Table
2-4
lists
the
IEEE
recommendations
for the
maximum
distances
between lOBaseT
station
connection
and
hub
Table
2-4
Ethernet
VIP Maximum
Transmission
Distances
Transmission
Speed
Max
Station-to-Hub
Distance
10Mbps
lOBaseT
328 100
Serial
Connections
As
with
all
signaling
systems
serial signals
can
travel
limited distance
at
any given rate Generally
the lower the
baud
rate
the greater the distance Table 2-5
lists
the
standard
relationship
between
baud
rate
and
distance for
RS-232
signals
Table
2-5
IEEE
Standard RS-232
Transmission
Speed Versus Distance
Baud
Rate
Distance
Feet
Distance
Meters
2400
200
60
4800
100
30
9600
50
15
19200
25
7.6
38400
12
3.7
56000
8.6
2.6
Balanced
drivers
allow
RS-449
signals
to travel
greater distances than
RS-232
Table
2-6
lists
the
standard
relationship
between baud
rate
and distance
for
RS-449
signals
Table
2-6
IEEE
Standard RS-449
Transmission
Speed Versus Distance
Baud Rate
Distance
Feet
Distance
Meters
2400
4100
1250
4800
2050
625
9600
1025
312
19200
513
156
38400
256
78
56000
102
31
Tl
50
15
The
distance
limits
for
RS-449
listed
in
Table
2-6
which
are
also
valid for V.35
and
X.21
are
recommended
maximum
distances
You
can get
good
results
at
distances
and
rates
far
greater than
these
In
common
practice
RS-449
supports
2-Mbps
rates
and
V.35 supports
Mbps
without
any
problems howeverzexceeding
these
maximum
distances
is
not
recommended
Preparing
for Installation
2-9
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