Powering Options. ADTRAN DS1, H2TU-C-231, E220 HFAC HDSL2, DSX 1, 1223024L2, 1181113L2, 1223004L12, 1223004L2, 1223026L2, 1223001L2

Installation Guidelines HDSL2 for General Distribution Installation and Maintenance Practice

Powering Options

H2TU-C

An H2TU-C module is capable of span powering an H2TU-R module by applying current to the local loop. Current from 10 to 150 mA is coupled onto an HDSL2 span to power the H2TU-R module when required.

Figure 3 shows the HDSL2 span powering diagram.

HDSL2

SPAN CURRENT

SPAN POWER

TIP (+)

190 V

RING (-)

Figure 3. HDSL2 Span Powering Diagram

H2TU-R Span Power

The H2TU-R P/N 1223026L2 receives span power from the H2TU-C.

H2TU-R Local Power

In some circumstances a locally powered remote unit is required. The H2TU-R

P/N 1223024L2 can meet those needs.

Module Installation

Follow the step-by-step procedures below to put the HDSL2 modules in service.

Total Access 3000 and 220/E220 H2TU-C Installation

To install the Total Access 3000 H2TU-C (P/N 1181113L2) or 220 H2TU-C module (P/N

1223001L2), perform the following steps:

1. Pull the ejector latch, located on the bottom of the module front panel, out from the closed position.

2. Hold the unit by the front panel while supporting the bottom edge of the module with the ejector latch opened to engage the enclosure edge.

3. Align the unit edges to fit in the lower and upper guide grooves for the module slot.

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