Specifications
Total Access 3000/3010 T1-OR/NIU Installation and Maintenance Practice
8 61181310L2-5D
CONNECTIONS
The cabling for the T1-OR/NIU is significantly different for each mode of operation:
• “Office Repeater Mode” on page 8
• “Network Interface Unit Mode” on page 9
Office Repeater Mode
Figure 2 illustrates the Office Repeater mode.
Figure 3 illustrates the backplane cabling for the Office Repeater mode.
Figure 2. Office Repeater Mode Orientation
Figure 3. Office Repeater Mode Backplane Cabling
Total Access 3000/3010 System
CSU/DSU
DS1
DSX-1
DS3
STS-1
OC3
Network
Central Office
Backplane
Pairs 1 and 2
E D C B A
D C B A
F2
LOOP
TEST
ACCESS
33
1
64
32
33
1
64
32
33
1
64
32
33
1
64
64
32
ADMIN J31
PAIR 2 P11
P12 P8
PAIR 3 PAIR 1
33
1
64
32
P10
PAIR 8
PAIR 6
PAIR 5
P9
P7
J33
EXTCLK
J23 J20 J26
1
64
1
33
1
33
32
C B A C B A C B A C B A
C B A C B A C B A C B A C B A C B A C B A
J29
10
20
32
1
J28
10
20
32
1
J27
10
20
32
1
10
20
32
1
J25
10
20
32
1
J24
32
1
10
20
32
1
J22
10
20
32
1
J21
10
20
32
1
10
20
32
1
J19
10
20
32
J18 J16
10
C B A C B A C B A C B A C B A
C B A C B A C B A C B A C B A C B A C B A C B A
PAIR 7
1
10
20
32
1
J17
10
20
32
1
10
20
32
1
J15
10
20
32
1
J14
10
20
32
1
J13
10
32
1
J12
20
20
32
1
J11
10
32
1
J10
10
20 20
32
1
J9
10
20
32
1
J8
10
20
32
1
J7
20
32
1
J6
10
10
20
32
C B A C B A C B A C B A
1
J5
20
32
1
J4
10 10
20
32
1
J3
10
20
32 32
1
J2
10
20
1
10
20
32
1
64
32
33
1
NTWK MGMT
J30
-48 VDC PRI
-48 VDC
RET
P22
ACO RMT AUX1 AUX2
A A A A B B B B
-48 VDC SEC
-48 VDC RET
P3
NO NC C NO NC C
AUX1 AUX2
P21
CRI-A
NO C NC NO C NC
NO C NC
MAJ-A MIN-A
P1
P20
P2
J32
P19 P18
ALARM OUTPUTS
CRI-A
B - OUT
NO C NC NO C NC NO C NC
MAJ-A MIN-A
A - OUT B IN E - NET IN OUT
+ – + – S + – S + – S
RS485
A B A B
T
R
S
T1
R1
S
F1
10
30
20
40
48
E D C B A
P14 P15
S
S
30
40
48
1
6
T
R
T1
R1
P23
DSX1
TEST
ACCESS
F4 F3
PC2A 94V-0
2298
1
J1
S
1
R22
P24
EXTCLK
C-IN
1
10
20
8
+
–
R21
CUSTOM
TELECOM
E190349
1181004L1
PAIR 4 P5
T1-OR Configuration
RCV from DS1
“MDF/Local Loop” side
XMT to DS1
“MDF/Local Loop” side
Pair 2
T/R
Pair 1
T1/R1
NOTE:
When the T1-OR/NIU is provisioned for
T1-OR mode, the DSX-1 signal is active
via these connections.