PairGain T1LIE044AA, Быстрое руководство по установке, Страница: 3 / 20

Revision 01 Section 350-231-134
HLU-231 List 3D 1
Introduction
The PairGain
®
HiGain
®
Line Unit Model HLU-231 List 3D (Part Number
150-1111-34) is the Central Office (CO) side of a repeaterless T1 transmis-
sion system. It is used in conjunction with the HiGain HRU Remote Unit to
provide a complete HiGain High-bit-rate Digital Subscriber Line (HDSL)
system.
This guide addresses HLU-231 List 3D operation when used with and without
doublers. For applications without doublers, the HLU-231 List 3D is directly
connected to the HRU by the two cable pairs. For doubler applications, one
or two doublers may be used in the HDSL loops between the HLU-231 List
3D and the HRU.
For more detailed information consult the HLU-231 List 3D Technical Prac-
tice (Section Number 150-231-134).