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 T200 H4TU-R Installation And Maintenance Practice

7. HDSL4 DEPLOYMENT GUIDELINES

The different segments of an HDSL4 circuit are defined
in Figure 26.
Figure 26. 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).
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
18

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
The guidelines reflected herein are for worst-case
scenarios, that is, for loops that contain a maximum
amount of disturbers, noise, etc. Actual deployment
guidelines may vary based on local policy. Please refer
to those guidelines on an as-necessary basis 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.
Recommended Maximum
30 dB
28 dB
Recommended Maximum
Recommended Maximum
Table 6.
Table 7
Downstream
32 dB
28 dB
10,470 ft.
9,865 ft.
9,865 ft.
14,770 ft.
14,050 ft.
14,050 ft.
61223424L2-5A