Fiberplex FOI-4972-S-ST Singlemode Fiber Optic Isolator/Converter Isolator for Phone POTS Instrument Side - Fax/STU/STE

ITEM #: FOI-4972-S-ST MFG #: 4972-S-ST

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  • Special Order Item: non-cancelable, non-returnable, non-refundable.

4972-S-ST - Overview

The Fiberplex FOI-2971 and FOI-4972 provide complete electrical isolation for 2-wire telephone communications. The FOI-4972 supports standard analog phones, STU-III (secure telephone unit) phones, STE (secure telephone equipment) phones, fax machines, and modems and supports Caller ID. 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.

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.

FOI version units can be mounted in several redundant powering chassis; rack and wall mount options including Tempest and NEMA alternatives.

A typical link consists of an FOI-2971 connected to the POTS line and an FOI-4972 at the subscriber's phone with a duplex fiber optic cable between them.

Power options sold separately

  • Features:

    • Converts standard POTs FXS/FXO to Fiber for Isolation and Extension
    • Useable for standard phones, STU-III and STE Phones, Fax Machines or Modems
    • The FOI-2971 connects to POTS Lines while the FOI-4972 connects to telephonic devices
    • The FOI-4972 has solid state relays on the outer black and yellow pair which can be used to activate external signaling devices when ringing is detected
    • FOI-4972s can be connected back to back to create a private line automatic ring-down circuit
    • Rugged metal enclosures with RFI shielding
  • Item Includes:

    • 1x Fiberplex FOI-4972-S-ST Singlemode Fiber Optic Isolator/Converter Isolator for telephone (POTS) instrument side, fax, STU or STE, or dial-up modem interface. V.90, Singlemode ST optics

4972-S-ST - Required Accessories

    4972-S-ST - Recommended Accessories

    California Residents:
    Cancer and Reproductive Harm -