ADTRAN 3192 H4TU-C, Установка и эксплуатация

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61223404L2-5A Issue 1, December 2003 21
Once the resistance of each segment is confirmed, refer
to
Figure 28 to decide if the H4TU-C is capable of span
powering two H4Rs and one H4TU-R. Alternatively,
the DSL Assistant program will automatically calculate
this and report any violations.
To utilize the graph shown in Figure 28 , perform the
following steps:
a. Find the line on the graph that represents the
known third segment resistance. These are the lines
running diagonally across the graph labeled 300 to
1100 ohms. This line represents the upper limit for
two H4Rs plus H4TU-R span powering.
b. Find the first segment resistance on the vertical
axis.
c. Find the second segment resistance on the
horizontal axis.
d. Find the instance where the two points from step b
and step c meet on the graph.
The point found in step d must be below the upper limit
line defined by the third segment measurement in step
a . If the instance where these two points is above this
line, the H4TU-C cannot span power two H4Rs and the
H4TU-R.
Note that these measurements represent only one of the
two HDSL4 pairs.
Figure 28. Resistance Budget Span Powering Two Repeaters