About the Compact Media Converter TP/BNC 50 Ohm
With the Compact Media Converter TP/BNC, 50 coax cable installations become more
accessible.
The Compact Media Converter TP/BNC is a 10 Mbps Ethernet Twisted Pair to 50
Ω
Coax
cable (e.g. RG-59) Media Converter, that allows the continued use of the already-installed 50
Ω
analog cable, eliminating the need to re-cable. As a low-cost, IEEE 802.3 single-conversion,
1U high, standalone media converter, the Compact Media Converter TP/BNC converts 10Base-
T twisted pair to 10Base-2 thin coax and includes one RJ-45 connector and one RG-59 BNC
connector. Each Compact Media Converter TP/BNC includes diagnostic LEDs and an internal
100/240 VAC power supply.
Compact Media Converter TP/BNC 50 Ohm Front Panel
The LEDs
Each Compact Media Converter TP/BNC features diagnostic LEDs. The following
illustration shows the location of the LEDs, and other features, on the Compact Media
Converter TP/BNC. The LED functions for the Compact Media Converter TP/BNC are as
follows:
TP LNK/ACT
Glows yellow when a twisted pair link is established and flickers when
data is being received..
BNC ACT
Flickers green in normal operation indicating activity on the BNC port.
BNC COL
Flickers red in normal operation indicating collisions are being detected
on the BNC segment.
POWER
Flickers yellow when the unit is receiving power.
Twisted Pair port
AC Power
LEDs
Thin Coaxial Port
BNC Termination
switch
Crossover/
pass-through
switch
Twisted Pair Crossover/Pass-Through Switch
The twisted pair port on the Compact Media Converter TP/BNC features a push-button
switch, located next to the twisted pair connector, for selecting a crossover workstation
connection or pass-through repeater/hub connection.
Select a pass-through connection by pressing the push-button
IN
. A crossover connection
is selected when the push-button is
OUT
. If uncertain whether a crossover or pass-through
connection is needed, set the push-button to the position that makes the TP LNK (link) LED
glow.
BNC Port Termination
The Compact Media Converter TP/BNC features a 2-position, termination switch (TERM)
next to the BNC connector that allows a thin coaxial segment to be terminated at the port
without the use of an external ‘T’ connector/terminator. (See the diagram in the
Compact
Media Converter TP/BNC 50 Ohm Front Panel
section.)
If a ‘T’ connector/terminator is used, this switch must be set in the OFF (disabled) position.
Otherwise, double termination will result, which will corrupt the signal.
Installing the Compact Media Converter TP/BNC 50 Ohm
The Compact Media Converter TP/BNC converters come ready to install. Deploy Compact
Media Converter TP/BNC units in pairs, or connect a Compact Media Converter TP/BNC
converter to another Black Box converter. To install a Compact Media Converter TP/BNC
converter, first make sure that the unit is placed on a flat surface. Attach the cables between the
Compact Media Converter TP/BNC and each device that will be interconnected, then plug the
unit into a reliable, filtered power source. Make sure to connect the BNC port of the Compact
Media Converter TP/BNC converter only to 50
Ω
coaxial cable.
When connecting an Ethernet cable to the Compact Media Converter TP/BNC, make sure
the cable corresponds to the crossover/pass-through switch. When using a crossover cable,
make sure the switch is out, in the “X” setting. The switch can be pressed again to change the
setting.
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