Frequency Electronics, Inc. FEI-Zyfer, Inc. FEI-Zyfer, Inc.
GPS Time and Frequency Systems
Carrier Class-Telecom Network Synchronization
FEI, with a 45-year legacy in precision oscillator technologies and more than 25 years of experience designing and
manufacturing SSU’s to function as Central Office BITS clocks providing network synchronization in major international carriers, has created an SSU (Synchronization Supply Unit) of unprecedented reliability, durability, survivability, adaptability, and cost efficiency.

All FEI-Zyfer Telecom Network Sync products include:

  • A standard 2 year warranty
  • Lifetime tech support with software updates and revisions as necessary
  • A full featured, intuitive Graphical User Interface (GUI)


  UNISync 5G-A
  • Carrier Class telecom timing clock to distribute DS-1, Composite Clock, and E-1 network sync outputs to TDM network elements in the telco
    Central Office
  • IEEE 1588 Grand Master PTP server modules
  • NTP Time Server modules
  • Both Time server modules offer GigE
    optical interfaces
  • GR-378 & GR-1244 compliance validated in lab testing at Telcordia Labs
  • Full redundant architecture for inputs, outputs, and oscillators, includes a standard clock bypass module
  • Quartz & Rubidium oscillators can be configured in either matched Stratum or mixed
    Stratum profile
  • NEBS level III certified


UNISync 5G-M
  • Telecom network synchronization for Tier 2 and Tier 3 operating networks - and any other smaller telco CO
  • All-in-one multi-function CO BITS clock
  • On-board, integrated GPS/PRS
  • Multiple TDM timing output formats - DS1, CC, E1
  • Pluggable modules for BOTH NTP and PTP Grand Master servers with front panel SFP GigE optical connections
  • Designed to optimize operator ease of use with an intuitive GUI
  • All the carrier class features and functions of the US5G system technology
  • NEBS compliant Primary Reference Source (PRS) for telecom network synchronization
  • Compliant with all relevant Telcordia GR Standards - GR-1244, NEBS level III, etc.
  • Space saving, low profile cabinet - 1 rack unit
  • "Pop-out" motherboard assembly for ease of maintenance and easy access for add-on daughter card functions
  • Multiple output signal formats - DS1, CC, E1, 1, 5, or 10 MHz, TOD, 1PPS, NTP/SNTP
  • GPS Antenna frequency converter facilitates cable runs of up to 1,000 feet with no additional signal amplification
  • 2 DS1 outputs are standard
  • Output capacity expansion to 12 is optional
  • Designed for maximum ease of use with a standard operator GUI




Product specifications subject to change without notice.


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