20
Connecting to the Ethernet Port
78-4339-09
Replacing a GRP
Figure 6
RJ-45 Receptacle and Plug (Horizontal Orientation)
Warning
The ports labeled Ethernet, 10BASE-T, Token Ring, Console, and AUX are safety extra-low voltage
(SELV) circuits. SELV circuits should only be connected to other SELV circuits. Because the basic
rate interface (BRI) circuits are treated like telephone-network voltage, avoid connecting the
SELV circuit to the telephone network voltage (TNV) circuits.
Depending on your RJ-45 cabling requirements, use the cable pinouts shown in
Figure 7
or
Figure 8
.
Figure 7
Straight-Through Cable Pinout (Connecting MDI Ethernet Port to MDI-X Wiring)
Figure 8
Crossover Cable Pinout (for Connecting Two GRPs)
Table 4
RJ-45 Receptacle Pinout
Pin
Description
1
TxD+
2
TxD–
3
RxD+
4
Termination Network
5
Termination Network
6
RxD–
7
Termination Network
8
Termination Network
H11096
8 7 6 5 4 3 2 1
RJ-45 receptacle
Category 5, UTP cable with plug
MDI-X wiring
MDI wiring
1 TxD+
2 TxD–
3 RxD+
6 RxD–
1 RxD+
2 RxD–
3 TxD+
6 TxD–
H11007
GRP
1 TxD+
2 TxD–
3 RxD+
6 RxD–
1 TxD+
2 TxD–
3 RxD+
6 RxD–
H11006
GRP
