Fiber Isolators for Nortel Meridian Systems
FiberPlex FOI-3900 Fiber Optic Isolator/Converter/Modem - Nortel Meridian telephone circuits; mission critical packaging



Packed in rugged military style metal enclosures, the FOI-3900 Series interconnects Nortel Phones and PBXs over Fiber for Isolation and Extension


Overview
The FOI-3901 and FOI-3902 both provide complete electrical isolation for Nortel’s Meridian™ M2000 and M3000 series digital telephones. The FOI- 3901 connects to the digital line card and automatically senses and corrects any improper polarity reversals on the RJ-11. The bidirectional signaling between the digital line card and telephone is then carried across a duplex fiber cable.

The FOM-3902 reproduces the digital signaling at the isolated end of the fiber optic link and provides power (±15VDC @ 50mA ) sufficient to operate M2000 and M3000 series digital telephones. The FOI-3902 is compatible with Nortel’s A0367335 plug-in transformer, which provides power to support the additional features on the M2016S digital telephone. A closet power supply can also be used to provide auxiliary power.

The user can achieve complete electrical isolation for Nortel’s Meridian™ M2000 and M3000 series digital telephones in areas of high electrical noise or in/out of RF shielded enclosures (SCIF). The fiber optic cable is not susceptible to induced impulse noise and since signal ground is not carried over the link, the signal is not affected by elevated ground potential from lightning or other sources. The fiber optic cable enhances privacy of communications. Fiber optic cable offers much longer transmission distance than traditional wiring. Nortel’s Meridian™ digital telephones are limited to a distance of 1750 feet (458m) from the PBX to the telephone, but optics on the module extend the distance to 2km.

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

Applications
A typical link consists of an FOI-3901 at the PBX and an FOI-3902 at the telephone with a duplex fiber optic cable in between.

FOI-3900 applications


Features
  • Provides fiber connectivity for Nortel Meridian Phone Systems
  • Supports all system features on Nortel’s Meridian™ M2000 and M3000 series digital telephones
  • Supports balanced 2-wire signaling between PBX and digital telephone
  • Rugged metal enclosures with RFI shielding
 
Ordering
# Model # Description Availability
1 FOI-3902-ST Isolator for Nortel Meridian M2000 and M3000 series telephones, Phone side, Multimode ST optics, Power Options Sold Separately Special Order
 
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