Appendix B - Functional Description
150-412-107-03, Revision 03
22
November 19, 1999
HRU-412 List 7
A
PPENDIX
B -
F
UNCTIONAL
D
ESCRIPTION
O
PERATIONAL
C
APABILITIES
HiGain uses PairGain’s 2B1Q HDSL transceiver system to establish two
full-duplex 784 kbps data channels between the HLU and a remotely mounted
HRU-412 List 7. This provides a total capacity of 1.568 Mbps between the
two units. PairGain’s HDSL technology provides full-duplex services at
standard T1 rates over copper wires between an HLU and an HRU, that
comprises one HiGain system.
The HRU-412 List 7 power supply converts the power feed voltage received
on the simplex pairs (or the -48 Vdc input when locally powered) to voltages
and currents required by the HRU-412 circuitry. The power supply generates
+5, -5 and 30 Vdc outputs. The 30 Vdc output is converted to a 60 mA current
feed to power a Network Interface Device (NID). Use caution when powering
a unit that requires more than 30 Vdc. The HRU-412 List 7 cannot power a
NID and another product simultaneously.
The HRU-412 dissipates 6 Watts of power and may consume up to 8 Watts
when feeding 60 mA of simplex current to the CI.
