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Serving Security Industry with Technology and Dedication

Fiber Transmission Products

N3555 and N3755 series provides the ability to transmit 4 digitally encoded video channels with 2-ch audio and 2-ch data over one optic fiber. Data format supports factory default setting RS-232, DIP selectable RS-422, RS-485, Manchester or Biphase.

Modular in design, the N3555 and N3755 series can be rack-mounted or used as a stand-alone module. Rack mounting requires the N3910 series subrack. Stand-alone module uses the N3910-2S and can be placed on a desktop or mounted to a wall.

  • Features
  • Order Info
  • Specifications
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  • 10 bits digitally encoded video transmission
  • NTSC, PAL, and SECAM auto compatible
  • Surface mount technology
  • Multiple audio format on-board jumper configurable
  • Factory default setting RS-232 optional
  • On-board DIP switch selection of RS-422, RS-485 (2 or 4 wires), Manchester/Biphase
  • LED indicators for monitoring of system operating status
  • On-board jumper activation of 120 Ohm termination resistor
  • Surge protection
  • Highest optical dynamic range
  • Immune to EMI and RFI
  • Dense structure for easy installation
  • Hot swappable rack mount cards
  • Automatic re-settable fuses, short circuit protection
  • 12 VDC or 24 VAC power supply
  • Industry standard connectors
  • No user adjustments required

FO MM TRX, 4V In, 2D IO, 2A IO, Module, 12VDC/24VAC

FO MM TRX, 4V In, 2D IO, 2A IO, Card, 2-Slot

FO MM TRX, 4V Out, 2D IO, 2A IO, Module, 12VDC/24VAC

FO MM TRX, 4V Out, 2D IO, 2A IO, Card, 2-Slot

FO SM TRX, 4V In, 2D IO, 2A IO, Module, 12VDC/24VAC

FO SM TRX, 4V In, 2D IO, 2A IO, Card, 2-Slot

FO SM TRX, 4V Out, 2D IO, 2A IO, Module, 12VDC/24VAC

FO SM TRX, 4V Out, 2D IO, 2A IO, Card, 2-Slot

Fiber Type Optical Budget (dB) Wavelength (nm) Range (km)
Multi-mode 7 1310/1310 2.2
Single-mode 17 1310/1550 25
*Higher output lasers available for range over 25km


1. Distance is limited to fiber loss, splices, chromatic dispersion and bandwidth

2. Range estimates are based on 1.0dB/km @ 1310nm on MM fiber, 0.35dB/km @ 1310nm and 0.25dB/km @ 1550nm on SM fiber, and include a 3dB safety factor

3. Range estimates for multimode are based on 1000MHz/km fiber

Technical Specifications
Video Performance
Video Channel 4
Video Input Impedance 75Ohm
Video Voltage 1.0Vp-p
Bandwidth 5Hz~6.5 MHz
Differential Gain 1% (typical)
Differential Phase 1° (typical)
Signal-to-Noise Ratio 67dB (weighted)
PCM Encoding 10 bits
Audio Performance
Format 600 Ohm (balanced/unbalanced) (Jumper Selectable); 10k Ohm/47k Ohm (unbalanced)
Audio Level -6 ~ +6dBm
Frequency Response 10 Hz ~ 20k Hz
Signal-to-Noise Ratio 75 dB (weighted)
Optical Performance
Output Power -12dBm (typical)
Receiver Sensitivity -19dBm (typical)
Wavelength 1310/1310nm
Connector ST
Output Power -5dBm (typical)
Receiver Sensitivity -22dBm (typical)
Wavelength 1310/1550nm
Connector FC
Data Performance
Data Rate DC to 115.2kbps
Bit Error Rate <10-9
LED Indicators
Power On Red
Optical Link Loss Red
Video Input/Output Presence Green
Audio Input/Output Presence Green
Data Input/Output Presence Green
General Parameters
Operating Temperature -40°F ~ 167°F (-40°C ~ 74°C)
Storage Temperature -40°F ~ 185°F (-40°C ~ 85°C)
Operating Humidity 0 ~ 95% RH (non-condensing)
Card Dimensions 1.57" x 5.08" x 6.73"
(W ×H ×D) (40mm x 129mm x 171mm)
Module Dimensions 1.73" x 6.22" x 7.87"
(W ×H × D) (44mm x 158mm x 200mm)
Power Consumption 5.7W
Card Weight 1.27lbs. (0.58kg)
Module Weight 2.33lbs. (1.06kg)
Mean Time Between >100,000 Hrs
Certifications and Approval
Product Certifications FCC1, CE/EMC2: EN 55022, EN 55024, EN 61000-3-2, EN 61000-3-3, UL, cUL, ISO 9001:2008
Certificate No.: 1 BCT09HC-821E; 2 BCT09HC-820E