150-450-132-02, Issue 02
Overview
HRE-450 List 2B, List 3B, and List 4B
March 6, 2000
1
O
VERVIEW
This technical practice describes the ADC
®
HiGain
®
Remote Enclosure Models HRE-450 List 2B, List 3B, and
List 4B. The HRE-450 is one component of the HiGain T1 transmission system, which transmits data at up to
1.544 Mbps on two unconditioned copper pairs over the full Carrier Service Area (CSA) range. A HiGain system
consists of a line unit and a remote unit, and may include up to four doublers to extend the transmission distance.
The HRE-450 is a weatherproof enclosure that houses either one single-slot HiGain Remote Unit (HRU) or one
HiGain Doubler Unit (HDU). The HRE-450 is mounted outdoors on any suitable above-ground surface such as a
concrete wall or wood telephone pole. It can not be installed underground, as this requires a sealed or pressurized
unit to prevent water intrusion. The HRE-450 List 2B has a single 20-foot, gel-filled cable stub; the HRE-450 List
3B has a single 20-foot long, air-filled cable stub; the HRE-450 List 4B has no cable stub.
In contrast to the HRE-450 List 2, List 3, and List 4, which only accept 400 mechanics plugs, the List 2B, List 3B,
and List 4B accept plugs with either 200 or 400 mechanics. These also support chassis/frame ground on
both Pins 1 and 27.
F
EATURES
•
Compact design
•
Easily mounted on a wall or pole using supplied screws
•
Front cover opens easily, which enables quick inspection or service of enclosed unit
•
Uses we
ather-sealing cable fittings that protect connections and provide strain relief
•
Protects remote or line unit against adverse weather conditions and harmful contaminants
•
Uses Quiet-Front Connector Modules (QFCMs) to provide electrical surge protection and
corrosion-resistant wire
