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Twisted-pair Ethernet (for 526-3001 only)
To connect the D20MX
to network devices
44
The10/100/1000BASE-T variant of the D20MX can connect to one or two networks through
two twisted-pair Ethernet connections. In single-IP mode this causes the two Ethernet
connections to use the same MAC address and IP address. Port 1 is the primary port and
Port 2 is the secondary port. When the system detects a signal on Port 1, Ethernet traffic
takes place on Port 1. When the system detects loss of signal on Port 1, Ethernet traffic
takes place on port 2.
All RJ-45 connectors have the same signal definition. However, the twisted-pair Ethernet
ports are auto MDI/MDIX and can support a straight-through or crossover cable.
External switches must have Spanning Tree Protocol port settings configured to edge for
proper operation.
Plug network cables into the D20MX twisted-pair Ethernet ports.
If the D20MX is deployed in the presence of strong RF energy in the 110 MHz - 125 MHz
band, such as airport ILS localizers or aviation radio transmitters, it is recommended that
shielded twisted-pair Ethernet cables be used.
Table 15: Ethernet RJ-45 connector signal definitions
Position
Function
1
RX+
2
RX-
3
TX+
4
P1+
5
P1-
6
TX-
7
P2+
8
P2-
Shield
Table 16: Ethernet crossover cable (RJ-45) pin out
D20MX
Name
Pin
TX_D1+
1
TX_D1-
2
RX_D2+
3
RX_D2-
4
BI_D3+
5
BI_D3-
6
BI_D4+
7
BI_D4-
8
CHAPTER 3: CONNECTING TO DEVICES AND NETWORKS
Signal Flow
IN
IN
OUT
-
-
OUT
-
-
-
Switch/Hub
Pin
3
6
1
2
7
8
4
5
GE INFORMATION
Color
White w/ Orange
Orange
White w/ Green
Blue
White w/ Blue
Green
White w/ Brown
Brown
-
Name
RX_D2+
RX_D2-
TX_D1+
TX_D1-
BI_D4+
BI_D4-
BI_D3+
BI_D3-
D20MX HARDWARE USER'S MANUAL
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