1000Base-T Ports; Mdi/Mdi-X Crossover Cable Wiring - Enterasys Vertical Horizon VH-2402S2 Hardware Installation Manual

1000Base-T Ports

1000Base-T ports support automatic MDI/MDI-X operation. Table A-3
below shows the 1000Base-T MDI and MDI-X port pinouts. These ports
require that all four pairs of wires be connected. Note that for 1000Base-T
operation, all four pairs of wires are used for both transmit and receive.
Pin
1
2
3
4
5
6
7
8

MDI/MDI-X Crossover Cable Wiring

Figure A-1 shows the wiring scheme for implementing a crossover cable
if needed for connection to the switch's 10Base-T or 100Base-TX ports.
Such a cable may be required when connecting the switch to another
switch or a hub device.
Figure A-1. External Crossover Cable Wiring
36 Technical Specifications
Table A-3. 1000Base-T Pinouts
MDI Signal Name
Transmit Data plus (TD1+)
Receive Data minus (RD1-)
Transmit Data plus (TD2+)
Transmit Data plus (TD3+)
Receive Data minus (RD3-)
Receive Data minus (RD2-)
Transmit Data plus (TD4+)
Receive Data minus (RD4-)
MDI-X Signal Name
Transmit Data plus (TD2 +)
Receive Data minus (RD2-)
Transmit Data plus (TD1+)
Transmit Data plus (TD4+)
Receive Data minus (RD4-)
Receive Data minus (RD1-)
Transmit Data plus (TD3+)
Receive Data minus (RD3-)
VH-2402S2