PairGain T1LI4144AA, Быстрое руководство по установке

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Revision 01 Section 350-231-174
HLU-231 List 7D 5
Installing the HLU-231
To install the HLU-231 into a PairGain shelf, slide the unit into the shelf card
guides for the desired slot, then push the unit in until it is entirely within the
card guide and the retaining latch locks into place, indicating that the unit is
properly seated:
Unipolar/Bipolar HDSL Voltage Option
The symmetry of the HDSL line powering voltage can be set by the S2
switch, located on the printed circuit board.
The factory default setting is Unipolar (-). It sets the HDSL line voltage to
0 V on loop 2 and to either -130V (for non-doubler applications) or -200 V
(for doubler applications) on loop 1.
The Bipolar selection sets the HDSL line voltage to +65 V on loop 2 and
-65 V on loop 1, for non-doubler applications. Doubler applications will have
+100 V on loop 2 and -100 V on loop 1.