MDI switch setting
MDI-X switch setting
100 meters
100 meters
2 kilometers - multimode
Switch Settings and Cable Requirements
The two active pairs in a
100BASE-TX network are pins
1 & 2 and pins 3 & 6. Use only
dedicated wire pairs (such as
blue/white & white/blue,
orange/white & white/orange)
for the active pins.
1
2
3
6
Twisted
Pair #1
Twisted
Pair #2
Straight Through Cable
1
2
3
6
Straight-through/crossover 100BASE-TX requirements are satisfied
using the MDI/MDI-X switch with straight-through cable.
Set the MDI/MDI-X switch to MDI for cable connections
between hub and media converter.
Set the MDI/MDI-X switch to MDI-X for cable connections
between media converter and terminal, transceiver or NIC.
Setting Switches
Use small flatblade
screwdriver or similar
device to set recessed
switches. Refer to label on
top of media converter for
MDI/ MDI-X switch
settings. Refer to drawing
at left for four-position
switch settings.
4-Position Switch
(4th switch not used)
Auto-negotiation (UP) Detects and adapts to line
speed/operation mode of attached device.
Full/Half-duplex (UP) Allows an attached full-
duplex station to transmit and receive
simultaneously. (DOWN) Allows an attached
station to transmit and receive sequentially.
LPT/RFD (UP) Blinks the SDF or SDC LED if a
malfunction is detected at the unit to which the
media converter is attached.
MDI/MDI-X
Straight-Through/Crossover
1. Is the power LED on the media converter illuminated?
NO
•
Is the power adapter the proper type of voltage and cycle frequency for AC outlet?
•
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-SX SDC LED illuminated?
NO
•
Check UTP cables for proper connection and MDI/MDI-X switch position. (See above.)
•
Contact Technical Support at (800) 260-1312/ (800) LAN-WANS.
YES
•
Proceed to step 3.
3. Is the fiber SDF 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-SX device.
•
Refer to Tech Tips available at: http://www.transition.com
•
Contact Technical Support at (800) 260-1312/ (800) LAN-WANS.
YES
Troubleshooting the Media Converter
Installation Notes
The physical characteristics of the media cable must meet or exceed IEEE 802.3u
100BASE-TX and IEEE 802.3z 100BASE-SX specifications.
Ethernet Cable Specifications
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.
•
KEEP TWISTED PAIR RUNS AS SHORT AS POSSIBLE.
•
Be certain that the 100BASE-TX MDI/MDI-X switch is set correctly for site installation.
•
Install unit with power supply unit provided. (Output 9 VDC regulated, 500 mA).
•
Connect the power supply cable to the media converter BEFORE connecting to outlet.
•
Install no more than two (2) media converters in series.
E-100BTX-SX-01
MDI
MDI-X
E-1
00B
TX-
FX-
O4
9V DC Input
Config
Switches
1 2 3 4
LPT/RFD UP=ON
Auto-negotiation UP=ON
Full/Half-duplex UP=FULL
(not used)
MDI-X
position
MDI
position
100BASE-SX Cable Specifications
MULTIMODE
Fiber-optic Cable Recommended:
62.5 / 125 µm multimode fiber
Optional:
50 / 125 µm multimode fiber
Modal bandwidth:
≤
160MHz-Km
Fiber-optic Transmitter Power:
min: -20 dBm
max: -12 dBm
Fiber-optic Receiver Sensitivity:
min: -24 dBm
max: -12 dBm
Wavelength:
850nM
Bit error rate:
≤
2.5-10
Maximum Cable Distance:
2-300 meters
