Hdsl4 Deployment Guidelines; Cable Characteristics For Hdsl4; Figure 52. Hdsl4 Circuit Segments; Table 11. Attenuation Limits - ADTRAN HDSL4 Installation And Maintenance Manual

HDSL4 for General Distribution Installation and Maintenance Practice

HDSL4 DEPLOYMENT GUIDELINES

The different segments of an HDSL4 circuit are defined in
H4TU-C
1st Segment
Four-segment, three-repeater support is a special case and will be
described separately
The ADTRAN HDSL4 system provides DS1-based services over loops designed to comply with
the guidelines given below. These guidelines apply to a single segment circuit (an HDSL4
circuit with no H4Rs), to a circuit having two segments (with one H4R), or to a circuit having 3
or 4 segments (with two or three H4Rs).
The guidelines reflected herein are for worst-case scenarios (i.e., for loops that contain a
maximum amount of disturbers, noise, etc.). Actual deployment guidelines may vary based on
local policy. Refer to those guidelines on an as-necessary basis to ensure optimum perfor-
mance.

Cable Characteristics for HDSL4

The loop (cable/wiring) deployment guidelines are as follows:
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. Loop Attenuation Limits. See
Segment
st
1
nd rd
2 and 3
61223HDSL4L2-5C
2nd H4R
1st H4R
2nd Segment

Figure 52. HDSL4 Circuit Segments

NOTE
Table 11.

Table 11. Attenuation limits

Upstream
30 dB
28 dB
Figure 52.
3rd H4R
3rd Segment 4th Segment
Recommended Maximum
HDSL4 Deployment Guidelines
H4TU-R
Downstream
32 dB
28 dB
55