PairGain 150-458-100-05, Руководство пользователя

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150-458-100-05 Overview
HRE-458 List 1, List 1B, and List 2 February 23, 2000 1
O
VERVIEW
This document describes the HiGain
®
Remote Therm-O-Nator HRE-458 gel-filled (List 1, List 1B) and air-filled
(List 2) enclosures and provides installation instructions for these enclosures.
F
EATURES
The following features are included on the HRE-458 HiGain Remote Therm-O-Nator enclosure:
•
Ten doubler card slots that support:
–
HDU-437 and HDU-407 (DDS Mechanics), HDU-439 (Dual 239 T1 Mechanics), and HDU-409 (Single
T1 Mechanics) Full T1 doublers
–
HDU-217 (DDS Mechanics) and HDU-219 (Dual 239 T1 Mechanics) Fractional T1 doublers
–
HDU-239 T1 repeaters
•
30-foot (9.144 m), gel-filled or air-filled, 52-pair cable stub
•
Flat surface, rack, or pole mount
•
Primary surge protection
•
Seamless, stainless steel cover with Therm-O-Nator heat exchange unit
•
Single stub access
•
Tilt forward mounting
•
Unique card guides that automatically adapt to accommodate any of the three mechanics form factors
currently supported
A
PPLICATIONS
The primary application of the HRE-458 is to house HiGain doubler units in a High-bit-rate Digital Subscriber
Line (HDSL) T1 transmission system. The remote enclosure is designed to protect HiGain doubler units from
potentially harmful conditions found in outdoor environments. The enclosure comes in either a single gel core stub
(List 1, List 1B) or air core stub (List 2) unit.
The HRE-458 gel core List 1, List 1B unit is intended for aboveground, pole-mounting applications that do not
require pressurization through the cable stub. However, if you prefer to pressurize the unit, it can be locally
pressurized by an optional exterior air cutoff valve (see
Figure 2 on page 4 ). The HRE-458 air core List 2 unit is
intended for underground installations. It can be pressurized from the main feeder cable through its air core stub.
The pressurization prevents the enclosure from flooding when mounted in underground manholes. Both units are
similar in that they have primary gas tube surge protection on all cable pairs.
The HRE-458 can be used to house the following doubler and repeater units. All of these doublers and repeaters
share the same generic slot pin assignments as shown in
Table 2 on page 15 .
•
HDU-439, HDU-437, HDU-409, or HDU-407 Full T1 (1.544 Mbps) unit
•
HDU-219 or HDU-217 Fractional T1 (772 Mbps) unit
•
ISDN repeater
•
DDS repeater
•
239 T1 repeater