Hdsl4 Deployment Guidelines; Table 6. Attenuation Limits; Table 7. Range Limits: 26 Gauge / 70°F / Pic; Table 8. Range Limits: 24 Gauge / 70°F / Pic - ADTRAN 3192 H4TU-C Installation And Maintenance Practice
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6. HDSL4 DEPLOYMENT GUIDELINES
The different segments of an HDSL4 circuit are defined
in
Figure
27.
Figure 27. HDSL4 Circuit Segments
The ADTRAN HDSL4 system provides DS1-based
services over loops designed to comply with the guide-
lines given below. These guidelines apply to the
following circuit configurations:
• a single segment or an HDSL4 circuit with no
H4Rs,
• a circuit having two segments (with one H4R), or
• a circuit having three segments (with two H4Rs).
The guidelines reflected herein are for worst-case
scenarios, that is, for loops that contain a maximum
amount of disturbers, noise, etc.
st
1
segment
nd
rd
2
and 3
segment
26 Gauge
st
1
nd
2
rd
3
26 Gauge
st
1
nd
2
rd
3
61223404L2-5A
Table 6. Attenuation Limits
Upstream
Table 7. Range Limits: 26 Gauge / 70°F / PIC
segment
segment
segment
Table 8. Range Limits: 24 Gauge / 70°F / PIC
segment
segment
segment
Issue 1, December 2003
Actual deployment guidelines can vary based on local
policy. Refer to the guidelines to ensure optimum
performance.
Designing a circuit with loop attenuation greater than
the recommended maximum loss may result in compro-
mised reliability of that loop. Follow the guidelines in
in this section to ensure that the circuit meets basic
requirements:
1. All loops are nonloaded only.
2. Any single bridged tap is limited to 2 kft.
3. Total bridged tap length is limited to 2.5 kft.
4. Bridge tap within 1000 feet of units may affect
performance of the circuit.
5. Loop Attenuation Limits. See
6. DSL-Recommended Range Limits. See
and
Table
8.
In three segment circuits (two H4Rs),
individual segment resistance values must be
verified.
Recommended Maximum
30 dB
28 dB
Recommended Maximum
9,865 ft. (see note above)
Recommended Maximum
14,050 ft. (see note above)
Table
6.
Table 7
NOTE
Downstream
32 dB
28 dB
10,470 ft.
9,865 ft.
14,770 ft.
14,050 ft.
19
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