Comtrol ES7110-VB User Manual
Page 11
Connecting the Ethernet Ports
RocketLinx ES7110 and ES7110-VB User Guide: 2000552 Rev. C - 11
Hardware Installation
All the Fast Ethernet ports automatically detect the signal from the connected devices to negotiate the link speed and duplex
mode. Auto MDI/MDIX allows you to connect another switch, hub, or workstation without changing straight-through or
crossover cables. Crossover cables cross-connect the transmit lines at each end to the received lines at the opposite end.
The Ethernet cables use Pins 1, 2, 3, and 6 of an 8-pin RJ45 connector. The signals of these pins are converted by the automatic
MDIX function, as shown in the following table.
Connect one side of an Ethernet cable into any switch port and connect the other side to your attached device. The Link/
Activity LED is lit when the cable is correctly connected. See
on Page 7 for detailed information about
the ES7110 LEDs. Always make sure that the cables between the switches and attached devices (for example, switch, hub, or
workstation) are less than 100 meters (328 feet).
The wiring cable types and maximum cable length are as follows.
•
Uplink ports: 10BASE-T: 2-pair UTP/STP Category 3, 4, 5 cable, EIA/TIA-568 100-ohm (100 meters)
•
Uplink ports: 100BASE-TX: 2-pair UTP/STP Category 5 cable, EIA/TIA-568 100-ohm (100 meters)
•
Uplink ports: 1000BASE-TX: 4-pair UTP/STP Category 5 cable, EIA/TIA-568 100-ohm (100 meters)
•
PoE ports: 4-pair UTP/STP Category 5e / 6 cable, EIA/TIA-568 100-ohm (100 meters)
Pin
MDIX Signals
MDI Signals
1
RD+
TD+
2
RD-
TD-
3
TD+
RD+
6
TD-
RD-
TX
D1
+
1
TX
D1
-
2
RX
D2
+
3
RX
D2
-
6
BI D3+ 4
BI D3- 5
BI D4+ 7
BI D4- 8
1
RX
D2
+
2
RX
D2
-
3
TX
D1
+
6
TX
D1
-
4 BI D4+
5 BI D4-
7 BI D3+
8 BI D3-
Straight-Through Cabling
TX
D1
+
1
TX
D1
-
2
RX
D2
+
3
RX
D2
-
6
BI D3+ 4
BI D3- 5
BI D4+ 7
BI D4- 8
1
RX
D2
+
2
RX
D2
-
3
TX
D1
+
6
TX
D1
-
4 BI D4+
5 BI D4-
7 BI D3+
8 BI D3-
Crossover Cabling
10/100BASE-TX
1000BASE-TX