Alpha Telecom UT3620 Triple NT1, Installation Manual

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Extended Bus Configuration:
This covers cases where more than 200 meters
is required between the NT1 and the TE.
Solution: Wire a TR a fixed distance from the
NT1, or if only one terminal is needed, turn on a
built-in TR. If a TR is wired into the line, up to four
terminals can be supported as long as each is
within 25 meters from the TR.
With only one terminal, the maximum distance
from the NT1 to the TR is 1300 meters. The
maximum distance is reduced to 1000 meters
with two to four terminals as in
Figure 10 below.
A variation of this method, called the Y-Bus
Configuration, allows the use of two equally
distant TR. More details about this configuration
are in the next section, “Y-Bus Configuration”.
From NT1 to TR is 1000m
ON
OFF
Figure 10. Extended Bus Configuration
TR
10 UT3620 NT1 Installation Guide Triple