CHAPTER 3: CONNECTING TO DEVICES AND NETWORKS
D20MX HARDWARE USER’S MANUAL GE INFORMATION 45
Table 17: Ethernet straight-through cable (RJ-45) pin 0ut
Fiber optic Ethernet (for 526-3003 and 526-3005LF
only)
The 100BASE-FX variant of the D20MX (GE part numbers 526-3003 and 526-3005) can
connect to one or two networks through two fiber-optic Ethernet connections.
The data rate on each port is 100 Mbps.
You must enable Far End Fault Indication (FEFI) or Loss Link Alert (LLA) in connected
external devices for proper redundant operation.
External switches must have Spanning Tree Protocol port settings configured to edge for
proper operation of 100Base-FX connected ports.
You can use the following glass optical fiber (GOF) cabling with the D20MX:
• 50/125 μm core/cladding multi-mode (gradient index) cable
• 62.5/125 μm core cladding multi-mode (gradient index) cable
• 100/140 μm core/cladding multi-mode (gradient index) cable
• 200 m core Hard-Clad Silica (HCS) multi-mode (step index) cable
You can use the following fiber optic terminations for D20MX cabling:
• ST Connectors (with 526-3003 and 526-3005LF + 526-3104LF fiber card)
• LC connectors (with 526-3005LF + 526-3103LF fiber card)
When calculating cable length, consider the following optical power levels:
• Glass optical fiber transmitter power is –19.0 ± 2 dBm
• Glass optical fiber receiver sensitivity is typically –25.4 dBm
This product contains components rated as Class 1 Laser Products.
D20MX PC
Name Pin Pin Name
TX_D1+ 1 1 RX_D2+
TX_D1- 2 2 RX_D2-
RX_D2+ 3 3 TX_D1+
RX_D2- 4 4 TX_D1-
BI_D3+ 5 5 BI_D4+
BI_D3- 6 6 BI_D4-
BI_D4+ 7 7 BI_D3+
BI_D4- 8 8 BI_D3-
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