Motorola Horizonmacro outdoor, Руководство по установке и настройке, Страница: 121 / 212

GSM-204-423 Interface panel cabling
31st Oct 01
Installation & Configuration: Horizon macro outdoor
68P02902W03-A
CONTROLLED INTRODUCTION
Inst. 3–65
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.
J1
J2
J5
J4
J7
J8
J10
J13 J11
J14
J16
J17
J0
Figure 3-38 Type 43 interconnect board (T43)
Table 3-10 T43 interconnections
NIU/
port
Pin
no.
Equipment
/ Ext
Pin no. Pin
no.
Equipment
/ Ext
Pin no.
0/0 J0-1 Tx1+ J1 centre J0-20 Tx1– J1 shield
J0-2 Rx1+ J2 centre J0-21 Rx1– J2 shield
not
d
J0-4 Tx4+ J4 centre J0-23 Tx4– J4 shield
used
J0-5 Rx4+ J5 centre J0-24 Rx4– J5 shield
0/1 J0-7 Tx2+ J7 centre J0-26 Tx2– J7 shield
J0-8 Rx2+ J8 centre J0-27 Rx2– J8 shield
not
d
J0-10 Tx5+ J10 centre J0-29 Tx5– J10 shield
used
J0-11 Rx5+ J11 centre J0-30 Rx5– J11 shield
1/0 J0-13 Tx3+ J13 centre J0-32 Tx3– J13 shield
J0-14 Rx3+ J14 centre J0-33 Rx3– J14 shield
not
d
J0-16 Tx6+ J16 centre J0-35 Tx6– J16 shield
used
J0-17 Rx6+ J17 centre J0-36 Rx6– J17 shield
Connector J0, pins 3,6,9,12,15,18,19, 22, 25, 28, 31, 34 and 37 are not
used