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Configuring Interfaces on the PRP
Ethernet Interface Receptacles, Cables, and Pinouts
There are two RJ-45 Ethernet interface receptacles on the PRP and one RJ-45 Gigabit Ethernet interface
receptacle on the PRP-2, providing media-dependent interface (MDI) Ethernet ports. These connections
support IEEE 802.3 and IEEE 802.3u interfaces compliant with 10BASE-T and 100BASE-TX standards.
The transmission speed of the Ethernet ports is auto-sensing by default and is user configurable.
Figure 11 shows a PRP RJ-45 receptacle and cable connectors. The RJ-45 connection does not require
an external transceiver. The RJ-45 connection requires Category 5 unshielded twisted-pair (UTP) cables,
which are not available from Cisco Systems, but are available from commercial cable vendors. Table 10
lists the pinout for the RJ-45 receptacle.
Figure 11 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 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 12 or Figure 13.
1 RJ-45 receptacle 2 Category 5 UTP cable with plug
Table 10 RJ-45 Receptacle Pinout
Ethernet Port Pin Signal Description
1 TxD+ Transmit data +
2 TxD– Transmit data –
3 RxD+ Receive data +
4 Termination Network No connection
5 Termination Network No connection
6 RxD– Receive data –
7 Termination Network No connection
8 Termination Network No connection
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