Section 150-232-100
Revision 01
Page 6
H D S L 2
H D S L 1
X C V R
X C V R
M IC R O P R O C E S S O R
F U S E
A LA R M
P O W E R
S U P P LY
B
A
B
1
2 7
2
2 8
T IP 1
T IP
R IN G 1
R IN G
H D S L 2
H D S L 1
-4 8 V 1 8
2 3
2 5
1 6
1 5
6
5
B AT
G N D
2 6
S TAT U S
P R O T E C T
S W IT C H
C O N T R O L
(7 , 8 , 1 3 , 1 4 , 2 9 )
A
R S -2 3 2
9
1 0
T IP
R IN G
D
S
X
1
R C V
T IP 1
R C V 1
R C V 2
R IN G 1
R IN G 2
T IP 2
S PA N
S PA N
X M T
D
S
X
1
B R G
B R G
M U X
D E M U X
P R E -
E Q U A LIZ E R
S E L E C T
T 1
F R A M E R
M O D E S E L
1 3 0V to
20 0V
P O W E R
S U P P LY
(IS O L AT E D )
1 2
1 4
A L R M
2 1
R
T E R M
1 9
1 7
Figure 3. HLU-232, List 1D Block Diagram. PairGain’s HDSL technology provides full-duplex services at standard
T1 rates over copper wires between an HLU and an HRU, which comprise one HiGain system.
Note: The HLU-232 List 1D requires the use of an HSA-232 Shelf Adapter for both normal and protection
applications.
