Fiberplex FOI-2971-ST Isolator for Telephone (POTS) - Exchange Side - Multimode ST Optics

ITEM #: FOI-2971-ST MFG #: FOI-2971-ST

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    FOI-2971-ST - Overview

    The Fiberplex FOI-2971 and FOI-4972 all provide complete electrical isolation for 2-wire telephone communications. The FOI-2971 is used with standard POTS lines. The FOI-4972 is the low cost solution for customers using standard analog phones, STU-III (secure telephone unit) phones, fax machines, and modems. It can pass caller ID and operate with STE (secure telephone equipment) phones.

    The units can be used in areas of high electrical noise or in and out of RF shielded enclosures. The fiber optic cable is not susceptible to interference caused by impulse noise, crosstalk, or EMI. Privacy of communications is also enhanced because the fiber optic cable does not radiate any emissions. FiberPlex recommends "R" units for high security applications because the units have added filtering and shielding for RFI suppression.

    In addition, fiber optic cable offers much longer transmission distances than traditional telephone line cord wiring. Multimode optics on the units can extend the distance to 2km, while singlemode optics can further extend the distance to 20km. A typical link consists of an FOI-2971 connected to the POTS line and a FOI-4972 at the subscriber's phone with a duplex fiber optic cable between them.

    Standard phones
    STU-III and STE phones
    Fax machines

    • Features:

      • The FOI-4972 has a solid state relay on the outer black and yellow pair which can be used to activate external signaling devices when ringing is detected.
      • Two FOI-4972 can be connected back-to-back to create a private line automatic ringdown circuit.
    • Specifications:

      • Power Requirement
      • Voltage Range (V): Min 7; Typ: 9; Max 12
      • Supply Current (mA): 525

      • Input Level (dBm): 5
      • Load Impedance (Ω): 600
      • Frequency Response (±3 dB) (Hz): Min: 200; Max 8k

        Solid State Relay
      • Load Voltage (V): 350
      • Load Current AC/DC (mA): Max: 120
      • Load Current DC (mA): Max: 200
      • On Resistance AC/DC (Ω): 23; Max 35
      • On Resistance DC (Ω): 7; Max 10

        Optical Charactistics
      • Multimode: Size: 62.5 / 125 μm; Max distance: 1.2 miles (2 km); Wavelength: 820 nm; Output power: -18 dBm; RX Sens: -30 dBm; Loss budget: 12 dB

        Physical Specifications
      • Storage Temperature: -40°F - 185°F (-40°C - 85°C)
      • OperatingTemperature: 32°F - 122°F (0°C - 50°C)
      • Case Dimensions(L x W x H): 4.5 inch x 1.3 inch x 2.5 inch (114 mm x 37 mm 65 mm)
      • Weight: 2 lb (0.9 kg)
    • Item Includes:

      • 1x Fiberplex FOI-2971-ST Isolator for Telephone (POTS) - Exchange Side - Multimode ST Optics

    FOI-2971-ST - Required Accessories

      California Residents:
      Cancer and Reproductive Harm -