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4. Install the lexan shield over the spacers.
5. Secure the 460RC/F card assembly by connecting a lock
washer and hex nut on each screw.
4.3 CONNECTING THE 75 OHM BNC PORTS
The 75 Ohm BNC ports on the front of the 460R16 are labeled
“TX” (Transmit Data Output) and “RX” (Receive Data Input). Simply
connect the G.703 lines as follows*:
G.703 Network Model 460RC/F
BNC Connector BNC Connectors
TX RX
RX TX
*NOTE: The total allowable cable lengths are subject to the
constraints of the ITU/CCITT G.703 recommendation. However,
we recommend a total patch cable length, including coaxial and
twisted pair cabling, of no more than 320 feet (200m).
4.4 CONNECTING THE 120 OHM RJ-45 PORTS
The pin configuration of the 120 Ohm twisted pair port is shown
below:
RJ-45 Pin(s) Function
1 ................................TX Output
2 ................................TX Output
3 ................................TX Shield
4 ................................RX Input
5 ................................RX Input
6 ................................RX shield
7 ................................no connection
8 ................................no connection
Simply install the twisted pair wires by making the following
connections.
G.703 Model 460RC/F
Instrument RJ-45 Pin No.
TX Output 4
TX Output 5
TX Shield 3
RX Input 1
RX Input 2
RX Shield 6
*NOTE: The total allowable cable lengths are subject to the
constraints of the ITU/CCITT G.703 recommendation. However,
we recommend a total patch cable length, including coaxial and
twisted pair cabling, of no more than 320 feet (200m).
Figure 4. Mounting a Model 460RC/F Module to the Rack
Spacer
Star Washer (behind
460RC/F Module)
460RC/F Modules
Lexan Shield
Lock Washer
Hex Nut
7 8