4
64179008APL1-5A
The incoming HDSL2 spans are terminated on P2, P3,
P4, and P5. (See
Figure 4
). These terminations
provide surge protection for each HDSL2 span. Only
three span powered pair are needed for operation, but
using four span powered pair provides redundant
power and/or extra bandwidth to the Total Access
1000 DAT.
Span powering meets all requirements of Class A2
voltages as specified by Bellcore GR-1089-CORE.
Modules
The Total Access 1000 DAT uses several modules to
operate and provide multiple services. There are two
classes of modules, Common Modules and Access
Modules. The Common Modules consist of the PSU,
Quad H2LIU, and ATM BCU. These modules are
needed to power up the shelf and to provide the
needed ATM switching fabric for the system. The
Access Modules consist of Quad SHDSL, Quad
ADSL, and Quad ADSL plus POTS and are used to
provide services to customers.
Figure 4. Total Access 1000 DAT HDSL2 Connections
Loop 3
1
T
R
1
6
11
16
21
2
7
12
17
22
3
8
13
18
23
4
9
14
19
24
21 22 23 24
5
2
3
4
5
10
6
7
8
9
10
15
11
12 13 14 15
20
16
17 18 19 20
25
Loop 4
Loop 2
Loop 1
P6 Unused
PSU
LIU
BCU
1
2
3
4
5
6
PSU
1179008L1
POWER
ATM BCU
1179112L1
NETWORK
TEST
A
D
M
I
N
ADSL
1179413L1
L
O
O
P
1
2
3
4
ADSL
1179413L1
L
O
O
P
1
2
3
4
ADSL
1179413L1
L
O
O
P
1
2
3
4
1179109L1
QUAD H LIU
L
O
O
P
1
2
3
4
1000
HDSL
1
HDSL
2
PWR
1
PWR
2
BYPASS
T R
P2
T R
P3
T R
P4
T R
P5
T R
P6
G
N
D
Summary of Contents for Total Access 1000
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