ADC 150-1592-11, Руководство пользователя

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Functional Description 150-402-111-02
16 December 8, 1998 HRU-402 List 1A
F
UNCTIONAL
D
ESCRIPTION
The HiGain 2B1Q HDSL transceiver system establishes two full-duplex
784 kbps data channels between the HLU and a remotely mounted HRU-402.
This system provides a total capacity of 1.568 Mbps between the two units.
HDSL technology also provides full-duplex services at standard T1 rates over
copper wires between an HLU and an HRU-402, which comprise one HiGain
system. A block diagram of the HRU-402 is shown in
Figure 5 on page 17 .
The HRU-402 List 1A power supply converts the 90 to 200 Vdc power that
is received on the simplex pairs to the voltage and currents required by the
remote unit circuitry.
The HRU-402 can be used with the HLU-232 line unit to form an automatic
1 by 1 protection switch system. Refer to the HiGain Line Unit Model
HLU-232 practice (Section number: 150-232-100-xx) for more details. For
this application, the HRE-422 List 5 remote enclosure must be used. This
enclosure provides access to the HRU-402 protection switch output, on
pin 12, which controls the protection switching function.