150-512-100-03, Revision 03
Overview
HRU-512 List 1
September 25, 1998
1
O
VERVIEW
The PairGain
®
HiGain
®
Remote Unit Model HRU-512 List 1 is the remote
end of a single pair repeaterless fractional T1 (FT1) transmission system. or
in equivalent enclosure manufactured by PairGain Technologies. When used
in conjunction with the HiGain Line Unit (HLU) the system provides 784
kbps transmission on one unconditioned copper pair over the full Carrier
Service Area (CSA) range. The CSA encompasses approximately 12000 feet
of AWG 24 or 9000 feet of AWG 26 wire, including bridged taps and gauge
changes. This HiGain system utilizes 2B1Q High-bit-rate Digital Subscriber
Line (HDSL) transmission technology as recommended by Bellcore
TA-TSY-001210.
The HRU-512 List 1 complies with ANSI T1.403-1989 and
T1E1.4/92-002R2 technical standards and recommendations. The
HRU-512 List 1 mounts in a single slot of any industry standard 400
mechanics shelf. The system also complies with TR-TSY-000063 Network
Equipment Building System (NEBS) Generic Equipment requirements, and
Transport System Generic Requirements (TSGR) common requirements
TR-TSY-000499.
The HRU-512 List 1 features:
•
ANSI T1.403 DS1 Customer Interface
•
HDSL Line or Local Power Options
•
Front Panel DS1 and HDSL Status Display Indicators
•
Extensive Loopback Capabilities
•
Metallic NREM Loopback. Conforms to
TR-TSY-000312
•
Provisioning Switches for CPE current, RCV LBO and XMT LOS
Initiated Loopback or AIS
•
Front Panel Jacks for Test Access
•
RS-232 Craft port
•
CPE Current Monitor Test Points
•
Front Panel HDSL Margin Threshold Indicator
•
Lightning and Power Cross Protection on HDSL and DS1 Interfaces
