iConverter STM-1 Coax to Fiber Media

iConverter STM-1 Coax to Fiber Media
iConverter STM-1 Coax to Fiber Media Converter
Standalone User Manual
Product Overview
The iConverter STM-1 coax to fiber media converter
converts 155.52 Mbps STM-1e coax to STM-1 fiber.
The coax port provides two mini-BNC 75Ω coax connectors
that comply with the ITU-T G.703 and Telcordia GR-253
standards for CMI coded 155.52 Mbps electrical
Installation Procedure
1) Configure DIP-switches
2) Install Standalone Module and Connect Cables
2) Verify Operation
This DIP-switch has no effect. The LS function of this
DIP-switch has been disabled to enhance compatibility
with third-party fiber optic devices. The STM-1 media
converter operates in LP mode.
When the DIP-switch is in the “RFD” position, the
module is configured for Remote Fault Detection. When
the DIP-switch is in the “Norm” position (factory setting),
Remote Fault Detection is disabled and operates in
LP mode.
Link Propagate (LP)
The LP mode transmits a link signal only when a link signal is detected. Utilizing this
configuration, a loss of a receive link signal will continue to propagate forward to the next
port in the network. Figure 2(a), on the following page, indicates a loss of link on the fiber
port. This fault condition is ‘propagated’ forward causing the coax port to drop its link due to
the propagated fault. This setting allows the loss of a link to be detected by SNMP or other
managed network devices.
Remote Fault Detect (RFD)
040-8899S-001A 3/09
Omnitron Systems Technology * 140 Technology Dr. #500 * Irvine, CA 92618
949.250.6510 tel * 949.250.6514 fax * www.omnitron-systems.com
The RFD mode transmits a link signal only when a link signal is detected. When a loss of
link is detected, this mode will perform both a loop back and propagate forward. Figure 2(b),
indicates a loss of Rx fiber. The fault is looped back in the opposite direction causing the port
on the other media converter to lose its fiber link. It also propagates the fault forward toward
the coax port causing the coax port to lose its link. Because the other unit is configured for
Link Propagate, the loss of fiber link causes the coax port to drop its link due to the propagated
fault condition.
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Note: It is not permitted to set both media converters to any RFD mode. A lockup condition
will occur.
d. Connect an appropriate multimode or single-mode fiber cable to the fiber transceiver
port on the STM-1 converter. It is important to ensure that the transmit (Tx) is attached
to the receive side of the device at the other end and the receive (Rx) is attached to the
transmit side.
WARNING: Do not attempt to remove the STM-1e device from the module. This will cause
damage to the module and the STM-1e device.
Once the module has been installed and configured per steps 1 and 2, verify the module is
operational by viewing the LED indicators.
Figure 2: Link Modes
For detailed information on the operation of the different Link Modes, download the application
note “iConverter Link Modes” available on Omnitron’s web page:
OFF State
ON State
No power applied
Unit is powered
P1 Lk
Port is not linked
Port is linked
P2 Lk
Port is not linked
Port is linked
Table 3: LED Indicators
a. The STM-1 converter is available in tabletop and wall-mount models. For wall-mounting,
attach the STM-1 converter to a wall, backboard or other flat surface. For tabletop
installations, place the unit on a flat level surface. Attach the rubber feet to the bottom
of the STM-1 converter to prevent the unit from sliding. Make sure the unit is placed in
a safe, dry and secure location.
To power the unit using the AC/DC adapter, connect the AC/DC adapter to an AC outlet.
Then connect the barrel plug at the end of the wire on the AC/DC adapter to the 2.5mm
DC barrel connector (center-positive) on the unit. Confirm that the unit has powered up
properly by checking the power status LED located on the front of the unit.
To power the unit using a DC power source, prepare a power cable using a two conductor
insulated wire (not supplied) with a 14 AWG gauge minimum. Cut the power cable to the
length required. Strip approximately 3/8 of an inch of insulation from the power cable
wires. Connect the power cables to the unit by fastening the stripped ends to the DC
power connector.
Connect the power wires to the DC power source. The Power LED should indicate the
presence of power.
WARNING: Note the wire colors used in making the positive and negative connections.
Use the same color assignment for the connection at the DC power source.
NOTE: If mounting with a safety ground attachment, use the safety ground screw at the
rear of the unit.
b. Insert the 155Mbps OC-3 SFP into Port 1 SFP receptacle on the STM-1 converter.
NOTE: The release latch of the fiber transceiver must be in the closed position before
c. The STM-1e interface on the converter utilizes mini BNC connectors. When connecting
to full size BNC connectors use the supplied adapter cables.
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