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Multi-Interface Sync / Async Fiber Optic Modem (RS232/422/485/V.35/TTL)

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The TC1705 Multi-Interface Fiber Optic Modem features modular, field-changeable interfaces to provide fiber communication for applications requiring high data rates and handshaking. It’s the ultimate "configure-it-as-you-need-it" multi-interface fiber optic modem.

  • Data Rates up to 256 Kbps
  • Distances up to 80 km*
  • Interchangeable Interfaces
  • Multi-mode or Single Mode Compatible
  • Optional built-in WDM technology for full duplex through one fiber
  • Local & Remote Loopback
  • Supports five RS-232 Control Signals
  • Built-In Power Redundancy
  • Optional Optical Redundancy
  • Rackmount, Standalone or Wall Mount
  • -40°C - +80°C Option Available
  • Modular design
*Contact factory for higher requirements (Laser version)

The TC1705 supports a wide range of serial interfaces including RS-232, RS-422, RS-485 (2-wire or 4-wire), RS-530, V.35 and TTL. Interfaces are modular and can be easily changed before or after installation.


Because of its versatility, features and multiple interfaces, the TC1705 is often used to link a wide variety of synchronous or asynchronous devices to a central CPU in a campus or intrabuilding fiber optic network.

TC1705 - Multi-Interface Sync/Async Fiber Optic Modem
Click to enlarge


Data Rates
  1. RS-232 (Async or Sync)up to 128 Kbps
  2. RS-422/485/530 (Async or Sync)up to 256 Kbps
  3. TTL, V.35 (Async or Sync)up to 256 Kbps
  1. TransmitterLED/ELED/LASER*
  2. ReceiverPIN Diode
  3. Wavelength850/1300nm MM, 1300/1550nm SM
  4. Fiber Optic ConnectorsST, FC, SC
  5. Loss Budgets* - 850/1300/1550nm
  6. Multimode @ 62.5/125µm15dB
  7. Single Mode @ 9/125µm20dB
  1. Interfaces/Connector RS-232, RS-422/530, RS-485, TTL, V.35DB25 Female
  1. Bit Error Rate1 in 109 or Better
  2. Dry Contact AlarmNormal OPEN
Diagnostic Functions
  1. Local & Remote LoopbackYes
  2. Signal Generator, Disable AlarmYes
Visual Indicators
  1. System StatusPWR A, PWR B, Vcc, ALARM
  2. Electrical Signal StatusTxD, RxD, DTE, "control & timing LEDs"
  3. Optic Signal StatusRx-A, Rx-B
  1. Standard12VDC @300mA
  2. Optional24Vdc, -48Vdc, 125Vdc or 115/230VAC w/ Power Cube
  1. Operating-10°C to 50°C
  2. Hi-Temp 1 (optional)-20°C to 70°C
  3. Hi-Temp 2 (optional)-40°C to 80°C
  4. Storage-40°C to 90°C
  5. Humidity95% non-condensing
Physical (Standalone Unit)
  1. Height(3.53 cm) 1.39"
  2. Width(18.13 cm) 7.14"
  3. Depth(16.59 cm) 6.53"
  4. Weight(544 gm) 1.2 lbs
* Contact factory for higher requirements


For more information

For assistance with this product or to request a user manual please contact Technical Support.