GE D20MX User Manual

44 GE INFORMATION D20MX HARDWARE USER’S MANUAL
CHAPTER 3: CONNECTING TO DEVICES AND NETWORKS
Twisted-pair Ethernet (for 526-3001 only)
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.
NOTE
External switches must have Spanning Tree Protocol port settings configured to edge for
proper operation.
To connect the D20MX
to network devices
Plug network cables into the D20MX twisted-pair Ethernet ports.
NOTE
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
Table 16: Ethernet crossover cable (RJ-45) pin out
Position Function Signal Flow Color
1 RX+ IN White w/ Orange
2 RX- IN Orange
3 TX+ OUT White w/ Green
4 P1+ - Blue
5 P1- - White w/ Blue
6 TX- OUT Green
7 P2+ - White w/ Brown
8 P2- - Brown
Shield - -
D20MX Switch/Hub
Name Pin Pin Name
TX_D1+ 1 3 RX_D2+
TX_D1- 2 6 RX_D2-
RX_D2+ 3 1 TX_D1+
RX_D2- 4 2 TX_D1-
BI_D3+ 5 7 BI_D4+
BI_D3- 6 8 BI_D4-
BI_D4+ 7 4 BI_D3+
BI_D4- 8 5 BI_D3-

GE D20MX Specifications

General

Brand	GE
Model	D20MX
Category	Computer Hardware
Language	English