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Total Access 3000 23-Inch Chassis Installation and Maintenance Practice
FR GND
Figure 3. Total Access 3000 Power Connections
To make the frame ground connection to Total Access 3000 Chassis, perform the following
steps:
1. Using an appropriate crimping tool and lug, fasten the lug to the ground wire.
2. Locate a nearby grounding screw on the equipment rack.
3. Secure the ground wire to Frame Ground using the lugged end of the grounding wire.
4. Cut the ground wire length to reach from the grounding lug on the rack to the Total
Access 3000 Chassis grounding terminal, located on the lower left corner of the
backplane. Leave enough slack to allow for tying to the rack, if required.
5. Using wire strippers, strip 5/8 inches of insulation from the grounding wire.
6. Insert stripped end of the ground wire into the copper Total Access 3000 grounding
terminal.
7. Tighten the ground connection securely with a straight-slot screwdriver.
Test Frame Ground Connection
To ensure a good ground, use a multimeter to check continuity between the frame grounding
lug and the rack grounding strap at the top of the rack. With the multimeter set to its lowest
resistance range, if applicable, place one lead on the rack's ground strap and the other lead on
the Total Access 3000 Chassis frame ground terminal. The reading should be 1 or 2 ohms.
Greater readings should be investigated.
The Ethernet port, Dual and Quad BNC ports, composite clock
ports, and any DSX-1 port must only be connected to intra-
building wiring.
8
TOTAL ACCESS CHASSIS
P 5
P A I R 4
64
64
33
32
1
33
P 1 2
P A I R 3
1
C B A
C B A
C B A
C B A
C B A
C B A
C B A
1
32
1
1
1
1
1
1
1
1
1
1
1
1
1
1
J29
J28
J27
J26
J25
J24
J23
J22
J21
J20
J19
J18
J17
J16
10
10
10
10
10
10
10
10
10
10
10
10
10
10
T
R
S
20
20
20
20
20
20
20
20
20
20
20
20
20
20
T1
R1
S
LOOP
TEST
ACCESS
32
32
32
32
32
32
32
32
32
32
32
32
32
32
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
64
P A I R 5
64
33
1
32
33
P7
1
P A I R 6
-48 VDC PRI
-48 VDC SEC
P22
P3
A
B
A
B
A
B
A
B
NO
C
NC
J33
1
-48 VDC
NTWK MGMT
J30
RET
-48 VDC RET
AUX1
ACO
RMT
AUX1
AUX2
-48 VDC PRI
TS1
-48 VDC RET
NOTE
P 1 1
P A I R 2
64
33
33
32
1
64
P 8
E D C B A
32
1
P A I R 1
P15
1
C B A
C B A
C B A
C B A
C B A
C B A
1
1
1
1
1
1
1
1
1
1
1
1
1
J15
J14
J13
J12
J11
J10
J9
J8
J7
J6
J5
J4
J3
J2
10
10
10
10
10
10
10
10
10
10
10
10
20
8
20
20
20
20
20
20
20
20
20
20
20
30
P24
EXTCLK
C-IN
1
+
–
S
32
32
32
32
32
32
32
32
32
32
32
32
32
C B A
C B A
C B A
C B A
C B A
C B A
C B A
P A I R 7
48
P9
33
64
64
32
1
33
P 1 0
1181004L1
1
32
P A I R 8
EXTCLK
RS485
J32
ALARM OUTPUTS
P21
P1
P20
P19
P18
R21
+
–
S
+
–
S
+
+
–
–
S
A
B
A
B
NO
C
NC
NO
C
NC NO
C
NC NO
C
NC
NO
C
NC NO
C
NC NO
C
NC
P2
AUX2
B - OUT
A - OUT
B IN
IN
OUT
E - NET
CRI-A
MAJ-A
MIN-A
CRI-A
MAJ-A
MIN-A
-48 VDC SEC
TS2
-48 VDC RET
ADMIN
J31
E D C B A
P14
1
J1
D
C
B
A
1
F2
F1
10
10
P23
20
DSX1
30
TEST
ACCESS
1
T
R
S
T1
40
R1
S
32
6
F4
F3
48
PC2A
94V-0
2298
CUSTOM
TELECOM
E190349
61181001L1-5E
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