150-412-181-01
March 31, 1998
Revision 01
HRU-412 List 8A
PairGain Engineering - Plant Series
1
O
VERVIEW
The PairGain
®
HiGain
®
Remote Unit Model HRU-412 List 8A is the remote
end of a repeaterless T1 transmission system. An HRU-412 List 8A connects
to a HiGain Line Unit (HLU-231, HLU-232, HLU-319, or HLU-388),
creating a HiGain system which provides 1.544 Mbps transmission on two
unconditioned copper pairs over the full Carrier Serving Area (CSA) range.
The CSA encompasses approximately 12,000 feet of AWG 24 wire or
9,000 feet of AWG 26 wire, including bridge taps and gauge changes. A
HiGain system utilizes 2B1Q High-bit-rate Digital Subscriber Line (HDSL)
transmission technology. The HRU-412 List 8A complies with ANSI
T1E1.4, T1.403-1989, and T1E1.4/92-002R2 technical standards and
recommendations. The HRU-412 List 8A mounts in a single slot of an
industry standard 400 Mechanics type shelf. The system also complies with
GR-63 Core of Network Equipment Building System (NEBS) Generic
Equipment requirements, and Transport System Generic Requirements
(TSGR) common requirements TR-TSY-000499.
The HRU-412 List 8A features:
•
Customer Interface (CI)
•
Front panel DS1 and HDSL LEDs
•
Front panel loopback button
•
Signature resistance on DS1 and HDSL ports
•
Generic and addressable repeater Loopback activation codes
•
Metallic Smart-Jack loopback (conforms to TR-TSY-000312)
•
Provisioning switches for customer premise equipment (CPE) current,
receive (RCV) level, and transmit loss of signal (TLOS) initiated
loopback or alarm
•
Line or local power options
•
Sealing current
•
Front panel jacks for test access
•
RS-232 connector
•
CPE current monitor test points
•
Front panel HDSL margin threshold indicator for each loop
Summary of Contents for 150-1103-81
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