Motorola Horizonmacro outdoor, Руководство по установке и настройке, Страница: 120 / 212

GSM-204-423 Interface panel cabling
31st Oct 01
Inst. 3–64
Installation & Configuration: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W03-A
BIB (BIM)
interconnection
The Balanced-line Interconnect Board (BIB), also known as BIM, provides the
line isolation between the E1/T1 circuit lines and the the CBIA backplane. The
board provides an interface for up to six input and six output balanced 120 ohm
lines. 12 transformers are used to provide line isolation while maintaining
impedance matching between the E1/T1 circuit lines and the NIU module. Each
transformer has a 1:1 turns ratio to match the external and backplane 120 ohm
connections.
Connection is made using a 37-pin D-type connector to both the BIB and the
external PCM twisted pair circuit lines. Figure 3-37 shows a typical BIB and
Table 3-9 lists the BIB interconnections.
J1
J0
Figure 3-37 Balanced-line interconnect board (BIB)
Table 3-9 BIB interconnections
NIU/
port
Pin
no.
Equipment/Ext Pin
no.
Pin
no.
Equipment/Ext Pin
no.
0/0 J0-1 Tx1+ J1-1 J0-20 Tx1– J1-20
J0-2 Rx1+ J1-2 J0-21 Rx1– J1-21
not
d
J0-4 Tx4+ J1-4 J0-23 Tx4– J1-23
used
J0-5 Rx4+ J1-5 J0-24 Rx4– J1-24
0/1 J0-7 Tx2+ J1-7 J0-26 Tx2– J1-26
J0-8 Rx2+ J1-8 J0-27 Rx2– J1-27
not
d
J0-10 Tx5+ J1-10 J0-29 Tx5– J1-29
used
J0-11 Rx5+ J1-11 J0-30 Rx5– J1-30
1/0 J0-13 Tx3+ J1-13 J0-32 Tx3– J1-32
J0-14 Rx3+ J1-14 J0-33 Rx3– J1-33
not
d
J0-16 Tx6+ J1-16 J0-35 Tx6– J1-35
used
J0-17 Rx6+ J1-17 J0-36 Rx6– J1-36
Connector J0 and J1, pins 3,6,9,12,15,18,19, 22, 25, 28, 31, 34 and 37 are
connected to earth