The following table describes the basic features of the copper ports.
Table 1-5 Specifications of GE ports
Protocol
IEEE Std 802.3-2012
Quantity
24
Interface Type
10Base-T/100Base-TX/1000Base-T interfaces
Cables
1000BASE-T interfaces: 100-ohm Category 5e UTP/STP cables, maximum cabling distance 100m
100BASE-TX interfaces: 100-ohm Category 5/5e UTP/STP cables, maximum cabling distance 100m
10BASE-T interfaces: 100-ohm Category 3/4/5/5e UTP/STP cables, maximum cabling distance 100m
If the port supports Auto-MDI/MDI-X, both straight-through and crossover cables can be used. RSR20-X-28 supports
MDI/MDI-X.
Considering that you may customize cables, the following section describes how to wire straight-through and crossover
cables.
As shown in the following figure, the pins of the RJ-45 connector are numbered 1 to 8, counting from left to right when
the connector is viewed from the side without the latching tab.
Figure 1-4 RJ-45 Connector Pin Number
Table 1-6 1000BASE-T Pin Assignments
Pin
MDI Mode
MDI-X Mode
1
Media Dependent Interface A+
Media Dependent Interface B+
2
Media Dependent Interface A-
Media Dependent Interface B-
3
Media Dependent Interface B+
Media Dependent Interface A+
4
Media Dependent Interface C+
Media Dependent Interface D+
