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Network Specifications
3.1.3 Network Configuration Restrictions
3
Total Drop Line Length
The total drop line length is the total of all drop line lengths. 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.
Baud Rate (Kbps)
Total Branch Length (m)
500
250
125
• Configuration Example
The following example is for a baud rate of 500 Kbps.
T
(with terminating resistance)
T
b
a
Node
Node
Node
The above example must satisfy the following conditions.
Drop lengths:
≤
≤
≤
a 6 m
b 6 m
c 6 m
d ＋ e ＋ g 6 m
≤
Total drop length ＝ a ＋ b ＋ c ＋ d ＋ e ＋ f ＋ g ＋ h 39 m
www.dadehpardazan.ir 88594014-15
39 max.
78 max.
156 max.
T
Node
c
d
f
T
e
Node
g
h
T
Node
Node
≤
d ＋ f 6 m
f ≤
d 6 m
d ＋ e ＋ h 6 m
≤
3-8
Terminating resistance
Node
: Trunk line
: Drop line
: T-Branch Adapter
T
≤
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