ADC HDU-409 Lists 1 Manuel D’Utilisation

Applications

LTPH-UM-1234-01

April 30, 2003

HDU-409 Lists 1, 2, and 3

PPLICATIONS

HiGain doublers operate with any number of other T1, Plain Old Telephone
System (POTS), Digital Data Service (DDS), or other HiGain systems
sharing the same cable binder group.

The HDU-409 can be used in two- to five-span circuits, depending on the
models of the HLU and HRU being used with the doubler units and the power
option chosen for the HRU. The number of doublers is equal to one less than
the number of spans as shown in

Figure 6 on page 24

Table 3

lists the maximum number of HDU-409 doubler units that can be

deployed according to which HLU and HRUs are used.

Each span can take up to 30 seconds to acquire HDSL
synchronization. The total time to acquire end-to-end
synchronization increases with the number of spans.

Table 3.

HDU-409 Circuit Ranges

HLU Model

Maximum Number of HDU-409 Doublers Per Circuit

(a)

(a) HRU-411 applications with Current-Customer Premises Equipment (I-CPE) ON are

limited to single HDU-409 doubler circuits. The HRU-412 is limited to applications with
one and two doublers only.

Line-Powered Remote

Locally-Powered Remote

I-CPE ON

I-CPE OFF

I-CPE ON

I-CPE OFF

HLU-388 List 2x,
HLU-319 List 2x,
HLU-231 List 3D,
HLU-231 List 6D,
HLU-232 List 1D
HLU-231 List 7x,
HLU-431 List 1D

HLU-231 List 8D,
HLU-319 List 5D,
HLU-388 List 5D
HLU-231 List 8/List 8E,
HLU-319 List 5/List 5E,
HLU-388 List 5/List 5E

(b)

(b) Requires HRU-402 or HRU-411.

(c)