Qg 2 Multi-Sync Gateway and PTP Grandmaster

Reliable and precise synchronization for private/enterprise wireless, data centers, LTE/5G and O-RAN, industrial IoT, smart grid, financial markets, and other critical network infrastructures.

Qg 2 Multi-Sync Gateway

The Qg 2, a multi-sync gateway, addresses the challenges of providing reliable and precise synchronization everywhere through IEEE 1588-2008 (PTP) and leveraging multiple sync references. 

As 5G evolves from non-standalone (NSA) supporting 4G today, to standalone (SA) architecture with 5G radio, the support for massive MIMO radios, network slicing, low latency and tight synchronization are critical considerations. In order to meet phase and frequency requirements for applications in the 5G service-based architecture, deploying more GMs (PRTC) in RAN and at the Edge is the only optimal solution that helps in future proofing the deployment and associated investment. The low cost, small footprint Qg 2 is the natural choice for all networks ‒ carrier, cloud provider and private networks. 

With virtualization and decomposition of 4G/5G base stations, the newly designed data-centers and CORDs (Central Office re-architected as Data Centers) require a very high capacity, easily scalable PTP master (T-GM, T-BC) in providing synchronization to hundreds of PTP slave devices. Qg 2 with its rich set of features easily meets this challenge. 

Qg 2 provides IEEE 1588-2008 (PTP) Grandmaster and Boundary Clock functionality at low total cost of ownership. It leverages VIAVI’s unique industry-leading PTP algorithms to deliver stringent timing for LTE-A, LTE-TDD, CBRS (USA), SxGP (Japan), private LTE and 5G architectures (both operator and private) and supports ITU-T G.8265 and G.8275 frequency and phase profiles. The product features multiple oscillator options to deliver a range of holdover performance. 

Qg 2 utilizes GNSS (GPS, Beidou, GLONASS, QZSS and Galileo) to receive and display both timing and location information. Qg 2 also utilizes PTP and Synchronous Ethernet as input references and generates PTP, SyncE and timing signals (frequency, 1 PPS and ToD) as outputs. The Multi-Sync Gateway features dual 1 GbE ports for both copper RJ45 and optical connections. It provides all the relevant timing interfaces such as GNSS, 1 Pulse Per Second (1 PPS), Time of Day (ToD) (input/output) and frequency (programmable output). 

The true innovation in this product lies in its simplicity, high performance, scalability and cost effectiveness. The Qg 2 has some unique features designed to make it easily manageable and provide resilient performance when reference sources are lost.


  • Small form-factor, designed for indoor deployments 
  • Highly scalable slave capacity 
  • Low power consumption 
  • High performance PTP clock 
  • Easy to deploy, user friendly management 
  • Configurable to operate in multiple modes: PTP Grandmaster, boundary, and slave clock 
  • Position and location information to aid SAS and other location-based services

Key features of the Qg 2 Multi-Sync Gateway

  • Multiple holdover options
  • Full IEEE 1588-2008 (PTP) Grandmaster
  • Telecom BC functionality
  • Supports G.8262 Synchronous Ethernet
  • ITU-T G.8265.1 Frequency, ITU-T G.8275.1 and G.8275.2 Time and Phase Profiles
  • ITU-T G.8272 and G.8273.2 (T-BC)
  • IEEE PC37.238 Power profile
  • Supports 1-step and 2-step clock
  • -48V DC power
  • SNTP (NTP Stratum 1) Server
  • Remote provisioning and management (CLI, HTTP(S) and SNMP)
  • Receives and displays both time and location information from GNSS 

Precision sync platform designed for:

  • 5G, Open RAN, small cell clusters, C-RAN and neutral host deployments
  • Suited to any S-plane LLS C1 - C4 5G ORAN configurations and different functional splits of RU/DU/CU in the RAN and edge evolution
  • Smart grid transmission and distribution substations
  • Mobile edge computing and enterprise
  • Industrial IoT and factory automation applications
  • Data centers and financial applications

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