Lantronix XPress DR+ manual Ethernet Interface Signals, Typical RJ45 Connector

Chapter 3: Installation and Hardware

Ethernet Interface

The XPress DR+ includes a two-port unmanaged Ethernet switch with a future option to migrate to a managed solution.

The internal IEEE 802.3-compliant Ethernet switch is non-blocking, using a 1K MAC address lookup table with store-and-forward architecture. The XPress DR+ supports auto-negotiation for 10Base-T or 100Base-TX in full and half-duplex modes, as well as automatic MDI/MDIX crossover, allowing use of both straight-through and crossed Ethernet cables. The unit also supports IEEE 802.1d spanning tree, which protects against the possibility of a network loop.

Table 3-4. Ethernet Interface Signals

Pin	Direction	Name	Function
TX+	Out	1	Transmit Data +
TX-	Out	2	Transmit Data -
RX+	In	3	Differential Ethernet Receive Data +
RX-	In	6	Differential Ethernet Receive Data -

The next drawing shows a typical RJ45 connector. The color is not standard but very typical of an Ethernet patch cable. Pin 1 is located at the top of the connector (orange + white). The view is from the end of the connector.

Table 3-5.Typical RJ45 Connector

XPress DR+ User Guide 23