Ethernet 10baseT fiber converter

10Base-T Ethernet Fiber Optic Converter
12VDC 24-48VDC 125VDC and 115/220VAC Power Options

  • 10Base-T Half/Full Duplex Operation
  • Link Distances Up to 80km*
  • Multimode & Single Mode (850/1300nm)
  • 8 Power/Network LED Status Indicators
  • Automatic UTP Polarity Correction
  • Slide Switch for UTP Uplink or Downlink
  • 15 dB Standard Loss Budget; Optional 20dB
  • Standalone/Wallmount or Rackmount



TC3105S Standalone Unit

TC3105R (Fitted into TCRM192 Card Cage)

The TC3105R/S UTP-to-Fiber Optic Converter is frequently used to link Ethernet switches or workstations. Typical applications include extending Full Duplex LAN segments up to 80km or connecting two Ethernet segments via fiber optic cable.


The TC3105R/S UTP-to-Fiber Optic Converter replaces or extends 10Base-T segments with multimode (850/1300nm) or single mode (1300/1550nm) fiber optic cable. It is fully compliant with IEEE 802.3 10Base-T and 10Base-FL standards. It is available in rackmount or standalone versions.  The TC3105R rackmount version fits into TCRM192 or TCRM196 19" rackmount card cages. The TC3105S is the standalone/wallmount unit.

Specifically designed for long distances, the TC3105R/S can extend LAN segments up to 80km, depending on fiber size, quality, wavelength and connectors. The standard optical loss budget is 15dB*. Features include automatic UTP Polarity Correction, a slide switch for UTP uplinks or downlinks and ten LED indicators to aid installation and troubleshooting procedures:

  "PWR A" - DC Power Supply Indicator, Power A
  "PWR B" - DC Power Supply Indicator, Power B
  "VCC" - VCC Voltage Indicator
  "PODIS" - Polarity Status Indicator
  "LTF"  - Link Test Fine (UTP Signal) Indicator
  "OP" - Optic Reception Indicator
  "TP"  - UTP (Ethernet) Activity Indicator
  "LMON" - Optical Link Monitor

The TC3105R/S works with all popular sizes of single mode and multimode fiber optic cable. Fiber optic connectors are ST, FC, or SC. Power is 12VDC or 115/230VAC with an external power cube. An extreme temperature version (-20 to 70C), Model TC3105T, is also available.


Data Rate
up to 10 Mbps
Transmitter ELED, ELED
Receiver PIN Diode
Wavelength 850nm, 1300nm Multimode
1300nm, 1550nm Single Mode
Fiber Optic Connectors ST or FC
Loss Budget*
(850nm, 1300nm)
Multimode (62.5/125m): 15dB
Single Mode (9/125m): 15dB
Connector (UTP) RJ45 Female
Bit Error Rate 1 in 109 or better
Visual Indicators
Power Status PWRA, PWRB, VCC
UTP Signal Status PODIS, TP, LTF
Optic Signal Status OP, LMON
Standard 12VDC @ 300mA (max)
Optional 115/230VAC (with external power cube)
Operating -10 to 50C
Hi-Temp (optional) -20 to 70C
Storage -40 to 90C
Humidity 95% non-condensing
Physical (Wallmount Base Unit)
Height (3.53 cm) 1.4"
Width (18.14 cm) 7.1"
Depth (16.57 cm) 6.5"
Weight (192 gm) 5.44 oz.


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301-924-7400 EXT 25

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