Straight-through/crossover 100BASE-TX requirements are satisfied
using the MDI/MDI-X switch with straight-through cable.
100BASE-TX cable connections between a hub and the media
converter require the MDI/MDI-X switch to be set to MDI.
100BASE-TX cable connections between the media converter and a
terminal, transceiver or NIC require the switch to be set to MDI-X.
Using small flatblade
screwdriver or similar
tool and referring to
label at front of media
converter, set
MDI/MDI-X switch
position for site
installation.
100BASE-TX Cable
1. Is the power LED on the media converter illuminated?
NO
• Is the power adapter the proper type of voltage and cycle frequency for your AC outlet?
NOTE: Refer to the “Power Supply Requirements” on the back page.
• Is the power adapter properly installed in the media converter and in the outlet?
• Contact Technical Support at (800) 260-1312/ (800) LAN-WANS.
YES
• Proceed to step 2.
2. Is the 100BASE-TX Link LED illuminated?
NO
• Check UTP cables for proper connection and pin assignment. (See above.)
• Contact Technical Support at (800) 260-1312/ (800) LAN-WANS.
YES
• Proceed to step 3.
3. Is the fiber Link LED illuminated?
NO
• Check fiber cables for proper connection.
• Verify that TX and RX cables on media converter are connected to RX and TX ports,
respectively, on the other 100BASE-FX device.
• Refer to Tech Tips available at: http://www.transition.com
• Contact Technical Support at (800) 260-1312/ (800) LAN-WANS.
YES
• Contact Technical Support at (800) 260-1312/ (800) LAN-WANS.
Troubleshooting the Media Converter
Installation Notes
The physical characteristics of the media cable must meet or exceed IEEE
802.3u 100BASE-TX and 100BASE-FX specifications.
ETHERNET CABLE SPECIFICATIONS
100BASE-FX CABLE SPECIFICATIONS
SINGLEMODE
Fiber-optic Cable Recommended: 9 µm singlemode fiber
Fiber-optic Transmitter Power: min: -15.0
dBm max: -8.0 dBm
Fiber-optic Receiver Sensitivity: min: -32.5 dBm max: -8.0 dBm
Wavelength: 1300nM
Bit error rate: ≤10
-9
Maximum Cable Distance: 20 kilometers
MULTIMODE
Fiber-optic Cable Recommended: 62.5 / 125 µm multimode fiber
Optional: 100 / 140 µm multimode fiber
85 / 125 µm multimode fiber
50 / 125 µm multimode fiber
Fiber-optic Transmitter Power: min: -19.0 dBm max: -14.0 dBm
Fiber-optic Receiver Sensitivity: min: -32.5 dBm max: -14.0 dBm
Wavelength: 1300nM
Bit error rate: ≤10
-9
Maximum Cable Distance: 2 kilometers
100BASE-TX CABLE SPECIFICATIONS
Category 5 wire or better is required. Either shielded twisted pair
(STP) or unshielded twisted pair (UTP) can be used. DO NOT USE
FLAT OR SILVER SATIN WIRE.
CATEGORY 5:
Gauge 24 to 22 AWG
Attenuation 20 dB/1000’ @ 10 MHz
Impedance 100 Ω ±10% @ 10 MHz
Maximum Cable Distance: 100 meters (330 feet)
• DO NOT CONNECT MEDIA CONVERTERS BETWEEN HUBS.
• When connecting to 10Mb/s-100Mb/s device, MANUALLY SET 10Mb/s-100Mb/s SWITCH to 100Mb/s.
• KEEP TWISTED PAIR RUNS AS SHORT AS POSSIBLE.
• Be certain that the 100BASE-TX MDI/MDI-X switch is set correctly for site installation.
• Connect the power supply cable to the media converter BEFORE connecting to the outlet.
• Install unit with PSU provided. (Output 12 VDC regulated, 350 mA).
• Install no more than two (2) media converters in series.
E-100BTX-FRL-03, E-100BTX-FRL-03(SC), E-100BTX-FRL-03(SM)