E-22
Total Drop Line Length
The total drop line length is a total of all drop line lengths.
Length Limits
The total drop line length must be within the allowable range and even then, each drop line
must be 6 m or less.
The allowable range of total drop line length varies with the baud rate as shown in the fol-
lowing table.
The following example is for a baud rate of 500 Kbps.
The above example must satisfy the following conditions.
• a
≤
6 m
• b
≤
6 m
• c
≤
6 m
• d
≤
6 m
• d+f
≤
6 m
• d+e+g
≤
6 m
• d+e+h
≤
6 m
The total drop line length must satisfy the following condition.
• Total drop line length = a+b+c+d+e+f+g+h
≤
39 m
Baud Rate (Kbps)
Total Drop Line Length (m)
500
39 max.
250
78 max.
125
156 max.
T-Branch Adapter
(with terminator)
Trunk line
Drop line
T-Branch Adapter
T
T
T
T
Terminator
Node
a
b
c
d
e
f
g
h
Node
Node
Node
Node
Node
Node
Node
