150-231-185-05, Revision 05
Overview
HLU-231 List 8E
September 13, 1999
1
O
VERVIEW
The PairGain
®
HiGain
®
Line Unit HLU-231 List 8E is the Central Office (CO) side of a repeaterless
T1 transmission system. When used in conjunction with a HiGain Remote Unit (HRU), the system provides
1.544 Mbps transmission on two unconditioned copper pairs over the full Carrier Service Area (CSA) range. The
CSA includes loops up to 12,000 feet of 24 AWG or 9,000 feet of 26 AWG wire, including bridged taps. This line
unit can be used with HiGain Doubler Units (HDUs) to extend reach.
F
EATURES
Product Enhancements
•
Five-span range with four doublers (60 kft, 24 AWG)
•
Four line-powered spans (three doublers and one remote)
•
Reduced power consumption
•
Customer Disconnect Indicator (CDI) option
•
Ultra-low wander (Stratum 1 compliant)
•
Low line-power option (-140 Vdc) for circuits with a single doubler
•
Selectable Power Feed (PWRF) modes: Auto, High, Low and Disabled
•
HDSL grounded loop detection
•
Bipolar Violation Transparency (BPVT) options
•
Bit Error Rate (BER) alarm options
•
HRU loopback screen
•
Inventory and troubleshooting screens
•
Loss of Signal/Alarm Indicator Signal (LOS/AIS) payload alarm option
•
Remote Loss of Signal (RLOS) disable alarm option
•
Digital Data Service (DDS) latching loopback option
•
Supports HRU-411 in PCS applications
•
Default setting screen option
•
Payload (PL) or HiGain (HG) loopback source identification
•
Remote Provisioning
