PairGain 150-1140-42, Manual

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150-319-142-01 December 22, 1997 Revision 01
HLU-319 List 4B PairGain Engineering - Plant Series 1
O
VERVIEW
The PairGain
®
HiGain
®
HiGain Line Unit Model HLU-319 List 4B is the
Central Office (CO) side end of a repeaterless T1 transmission system. An
HLU-319 List 4B connects to a HiGain Remote Unit (such as an HRU-412
List 8B), creating a HiGain system which provides 1.544 Mbps payload
transmission on two unconditioned copper pairs covering 3658 m of 0.51 mm
wire or 2743 m of 0.4 mm wire, including bridge taps and gauge changes.
A HiGain system utilizes 2B1Q High-bit-rate Digital Subscriber Line
(HDSL) transmission technology. The HLU-319 List 4B complies with ANSI
T1E1.4, T1.403-1989, and T1E1.4/92-002R2 technical standards and
recommendations. The HLU-319 List 4B mounts in a single slot of an
industry standard 3192-type Mechanics shelf. The system complies with
Transport System Generic Requirements (TSGR) common requirements
TR-TSY-000499.
The HLU-319 List 4B features:
•
Selectable DSX-1 pre-equalizer
•
Front panel HDSL S/N margin display
•
Selectable loopback activation codes
•
Craft port (RS-232)
•
Network Management Administration (NMA) interface
•
Front panel operator setup stored in non-volatile memory
•
Front panel DS1 splitting and bridge access
•
Lightning and power-cross protection on HDSL interfaces
•
784 kbps full duplex 2B1Q HDSL transmission on two pairs
•
Front panel status indicating LED
•
On/off front panel display power cycling
•
DSX-1 LOS detector (125 consecutive zeros)
•
Margin threshold alarm
•
HDSL AIS and SmartJack AIS options