7
3.2 CONNECTING THE 75-OHM BNC PORTS
The 75-Ohm BNC ports on the front of the balun rack are labeled
TX
(transmit data input) and
RX
(receive data output). Connect the G.703
lines as shown in Figure 3.
Figure 3.
Model 450RC24 front panel
The numbers on each coax pair correspond to the 50-pin Telco ports on
the rear of the unit.
3.3 CONNECTING THE 120 OHM 50-PIN TELCO PORTS
The 120-Ohm balanced pairs are accessed via the 50-pin Telco con-
nectors J1 and J2.
Figure 4.
Model 450RC24 rear panel
The number of each coax pair corresponds to the two 50-pin Telco connector s pin numbers
on the rear panel. Coax pairs 1—12 terminate on Telco connector J1; 13—24 terminate on J2.
Receive
Transmit
RX
TX
TX
RX
TX
RX
24
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
1
J2
J1
J2
J1
