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GSM-204-423
T43 (CIM)
interconnection
The Type 43 Interconnect Board (T43), also known as CIM, provides the
impedance matching and line isolation between the E1/T1 circuit lines and the
CBIA backplane. The board provides an interface for up to six input and six
output unbalanced coaxial 75 ohm lines. 12 transformers are used to provide
impedance matching and line isolation between the E1/T1 circuit lines and the
NIU module. Each transformer has a 1:1.25 turns ratio to match the external 75
ohm and backplane 120 ohm connections.
Connection is made using a 37-pin D-type connector to the interconnect board
and twelve type 43 coaxial connectors to the external E1/T1 circuit lines.
Figure 3-38 shows a typical T43, and Table 3-10 lists the T43 interconnections.
NIU/
used
used
used
31st Oct 01
Figure 3-38 Type 43 interconnect board (T43)
Table 3-10 T43 interconnections
Pin
Equipment
port
no.
/ Ext
0/0
J0-1
Tx1+
J0-2
Rx1+
not
J0-4
Tx4+
d
J0-5
Rx4+
0/1
J0-7
Tx2+
J0-8
Rx2+
not
J0-10
Tx5+
d
J0-11
Rx5+
1/0
J0-13
Tx3+
J0-14
Rx3+
not
J0-16
Tx6+
d
J0-17
Rx6+
Connector J0, pins 3,6,9,12,15,18,19, 22, 25, 28, 31, 34 and 37 are not
Installation & Configuration: Horizon macro outdoor
68P02902W03-A
CONTROLLED INTRODUCTION
J0
J8
J4
J14
J10
J16
J2
J13
J11
J7
J1
J17
J5
Pin no.
Pin
Equipment
no.
J1 centre
J0-20
J2 centre
J0-21
J4 centre
J0-23
J5 centre
J0-24
J7 centre
J0-26
J8 centre
J0-27
J10 centre J0-29
J11 centre
J0-30
J13 centre J0-32
J14 centre J0-33
J16 centre J0-35
J17 centre J0-36
used
Interface panel cabling
Pin no.
/ Ext
Tx1–
J1 shield
Rx1–
J2 shield
Tx4–
J4 shield
Rx4–
J5 shield
Tx2–
J7 shield
Rx2–
J8 shield
Tx5–
J10 shield
Rx5–
J11 shield
Tx3–
J13 shield
Rx3–
J14 shield
Tx6–
J16 shield
Rx6–
J17 shield
Inst. 3–65
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