Network Sync & Timing Experts

Chronos has been delivering global synchronisation and timing excellence to telecoms, energy, banking, financial institutions, broadcast, enterprise IT & defence markets for over 35 years; optimising timing in communications networks and enabling our customers to deliver seamless services.

Working closely with our customers, our team of technical experts provide complete solutions from network design, solution specification, build & test, installation & commissioning and 24/365 support, delivering best performance for communications networks.

Assured Quality service

Customers come first.  Our professional sync & timing solutions are designed to assist you at every level of design, supply, install and support across a wide range of networks and applications.

Precise, accurate time in your network starts with a quality installation

GPS Timing Equipment Installations

Keeping your Networks operational and generating revenue 24/7/365

24/7/365 Technical Support

Maintaining the integrity of your network

Timing Audits & Consultancy

TimeProvider 4100 Precise Timing Gateway Clock


Precise Timing Grandmaster with Gateway Clock, PRTC-B, High-Performance Boundary Clock, Enhanced PRTC & Redundancy

TimeProvider 4100 release 2.2, with ePRTC, meets the highest timing accuracy (30ns) to protect operators from GNSS dependencies and disruptions.

GPS Satellite Vehicle Number (SVN) 23 launched in 1990 was retired from service in January 2016. It had occupied Pseudo-Random Noise (PRN) sequence 32 since 2008. According to NANU 2016008 it was marked unusable at 15:36 UTC on 25th January and decommissioned at 22:00 UTC later that same day. Unfortunately (for reasons not yet fully known) the UTC signal on some satellites was off by 13 microseconds. This Case Study charts the activity undertaken by the Chronos support team during and after this unprecedented GPS anomaly event. For some with long memories this is not the first time that SVN23 has caused a problem. The last time was 1st January 2004.

Chronos operates a 24x7x365 support (Service Support Plan – SSP) desk for nearly 100 timing equipment users in over 50 countries around the globe. The first call into the Chronos support team came at 02:00 UTC from a panicked engineer from Customer A who had been called out of bed by their Network Operations Centre (NOC) reporting alarms at a handful of Microsemi (Symmetricom) SSU2000s. These were disqualifying GPS inputs due to the Maximum Time Interval Error (MTIE) metric being outside of set limits. The customer’s engineer was concerned as three sites had gone into holdover since (at those sites) no backup inputs had been assigned. At this stage it appeared that the GPS error had cleared and the Chronos SSP Manager was able to force the units out of holdover. However the scale of the problem escalated as these sites went back into holdover along with dozens of other sites suffering GPS based timing issues.





News, Videos, Events, Blogs

Detection and location products and solutions available from Chronos a world leader in GNSS vulnerabilities solutions

GPS Interference or Jamming Issues?

29 April at 12:00 - 12:30 CET preparing for innovative services that need accurate time and synchronisation

WEBINAR: Timing for the Data Centre

Operational Technology across all sectors is increasingly complex and reliant on accurate timing and sync

GNSS and your Cyber Security Strategy

Recommend how to measure poor sync; how to improve sync availability and redundancy and how to increase visibility of sync health

Network Sync Audits

GPS, GLONASS, Galileo & BeiDou repeaters, receivers, antennas and infrastructure from Chronos via

Chronos has been successfully supplying and supporting critical national infrastructure for over 30 years ...

Coronavirus Policy

UCentric captures and analyses raw information and produces reports to improve efficiency and your top line

SMART Technology

Chronos a world leading specialists in resilient time, timing and GNSS system delivery

Corporate Video