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TimeCesium® Primary Reference Source (PRS)

Superior and Highly Reliable Synchronization Signals for Advanced Network Services

Our autonomous TimeCesium PRSs—PRS-4400 and PRS-4500—are based on the latest cesium III technology. They are designed to generate superior and highly reliable synchronization signals for advanced network services that meet the G.811 and G.811.1 standards. The TimeCesium PRS produces accurate, spectrally pure and stable output signals using a cesium beam tube resonator. It delivers total control of your 5G network synchronization source, enhances network performance, reduces errors in the SONET/SDH payload and prevents upstream network clock errors from propagating across the network.

Key Features

  • State-of-the-art cesium III beam tube technology for 5G networks
  • Autonomous Stratum 1 primary reference source
  • No antenna installation required
  • Front-access ETSI shelf model: PRS-4400
  • Rear-access ANSI shelf model: PRS-4500
  • DS1, E1, 2048 kHz G.703/13, 10 MHz, 5 MHZ, 1.544 MHz and composite clock outputs
  • 12-year warranty on cesium tube
  • Enhanced Primary Reference Clock (ePRC) compliant per G.811.1
  • Enhanced Primary Reference Time Clock (ePRTC) compliant when used with TimeProvider® 4100 series and ePRTC license

Available Models

Model Number RoHS 3 Status  Access Shelf ITU-T G.8272.1 ePRTC Compliance
(With TP4100 Series and ePRTC License)
PRS-4400 Noncompliant Front-access ETSI 1 sigma holdover compliance
PRS-4400R Compliant Front-access ETSI 1 sigma holdover compliance
PRS-4400R-EP Compliant Front-access ETSI 2 sigma holdover compliance
PRS-4500 Noncompliant Rear-access ANSI 1 sigma holdover compliance
PRS-4500-EP Noncompliant Rear-access ANSI 2 sigma holdover compliance

The Virtual Primary Reference Clock

To support secure 5G network communications, the virtual Primary Reference Time Clock (vPRTC) is a highly secure and resilient network-based timing architecture that blends our secure GNSS firewall technology, high-precision atomic system clocks and a portfolio of trusted time solutions to meet the expanding needs for 5G deployment. The TimeCesium PRS plays an important role in the vPRTC as it provides the time reference when GNSS source clocks are not available.

Virtual Primary Reference Time Clock Graphic

Documentation

Brochures

TimeCesium 4400 Sell Sheet
PDF
TimeCesium 4500 Sell Sheet
PDF

User Guides

TimeCesium User's Guide
PDF

Miscellaneous

Monitor3 CSIII Software
PDF

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