Installation manual
Circuit Card Installation
5-73000-A2-GA31-F0 March 2001
NOTE
To ensure proper alignment of
the circuit card(s) and rear
connector plate or connector
module, perform Step 7 only
during initial installation.
After that, remove or install
modular circuit cards from the
front of the carrier.
7. Return to the rear of the carrier and tighten either
the:
— Screw on the rear connector plate, or
— Two screws on the connector module.
Verify that the circuit card is firmly seated to ensure a
connection with the rear connector plate.
After installing the circuit card, do the following:
• Connect the cables.
• Install the ferrite chokes, if supplied; see Ferrite
Choke Installation on page 5-8.
• Configure the unit as described in the device’s
documentation.
• Perform verification testing as described in the
device’s documentation.
T1 CSU and T1 DSU/CSU
Circuit Card Installation
NOTE
Before installing a T1 CSU or
T1 DSU/CSU circuit card in a
carrier, you must first install a
T1 auxiliary backplane. Refer to
the T1 Auxiliary Backplane
Installation section in Chapter 3.
After installing the T1 auxiliary backplane, you are
ready to install a T1 CSU or T1 DSU/CSU circuit card
(Figures 5-8 and 5-9).
496-14852-02
66-Pin
Auxiliary
Backplane
Connector
30-Pin
Backplane
Connector
N
et
E
q
M
o
n
In
O
ut
In
O
u
t
N
e
t
E
q
OK
Fail
Test
Sig
OOF
Alrm
EER
Sig
O
OF
Alrm
PDB
BPV
S
e
l
e
c
t
N
e
t
D
T
E
C
S
U
3151
T1
CSU
Figure 5-8. T1 CSU Circuit Card
496-14853-02
66-Pin
Auxiliary
Backplane
Connector
30-Pin
Backplane
Connector
N
et
E
q
M
o
n
In
O
ut
In
O
u
t
N
e
t
E
q
OK
Fail
Test
Sig
OOF
Alrm
EER
Sig
OOF
Alrm
PDB
BPV
S
e
l
e
c
t
N
et
D
T
R
T
X
D
R
X
D
C
T
S
RT
S
D
S
U
/C
S
U
3161
T1
DSU/CSU
DSU
Figure 5-9. T1 DSU/CSU Circuit Cards