Overview
150-231-185-05, Revision 05
2
September 13, 1999
HLU-231 List 8E
Standard Features
•
Selectable DS1 pre-equalizer
•
Front-panel features:
–
Four-character status display
–
DS1 splitting and bridging access
–
Status LED
–
RS-232 craft port for connection to a maintenance terminal (ASCII terminal or a PC running a terminal
emulation program)
•
Compatible with SXSS shelves, and equivalent
•
Selectable loopback activation codes
•
Network Management and Administration (NMA) interface
•
Lightning and power cross protection on HDSL interfaces
•
Full duplex 2B1Q HDSL transmission on two pairs at 784 kbps
•
Margin threshold alarm
C
OMPATIBILITY
The HLU-231 List 8E is designed to be mounted in 220 mechanics shelves. For a list of compatible shelves, see
“Appendix C - Compatibility” on page 61
All generations of HiGain HLU and HRU modules are compatible with each other. To take advantage of the
enhanced features of newer HiGain doublers, refer to
“HiGain Doubler Circuit Deployment” on page 61
A
PPLICATIONS
HiGain systems provide a cost-effective, easy-to-deploy method for delivering T1 High Capacity Digital Service
(HCDS) over metallic pairs.
•
The service is deployed over two unconditioned, non-loaded copper pairs, yet it demonstrates a quality that
is competitive with fiber optics.
•
Conventional, in-line, T1 repeaters are not required.
•
Cable pair conditioning, pair separation and bridged tap removal are not required.
In general, HiGain systems:
•
Operate with any number of other T1, POTS, Digital Data Service (DDS) or other HiGain systems sharing
the same cable binder group
•
Can be used with customers requiring DS1 service on a temporary or permanent basis
•
Provide a means of quickly deploying service in advance of fiber-optic transmission systems.
With a HiGain system, service can be provided within hours. Fiber-optic systems can be installed incrementally
and cut-over from the installed HiGain system when convenient to do so.
