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Qg2: Multi-Sync Gateway
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Qg2: Multi-Sync Gateway


Mobile operators are deploying LTE small cells in traffic hotspots and coverage holes. This occurs in a variety of locations such as in urban canyons and indoors, where GNSS signals are weak or intermittent. Qulsar’s Qg2, a Multi‐Sync Gateway addresses this challenge of providing reliable and precise synchronization everywhere by using multiple sync references. Qg2 is designed for deployment in distributed cluster sync architectures. This involves moving timing resources close to the edge of the network to meet the phase and frequency precision requirements at the small cell or remote radio head (RRH). Deploying a centralized Grand Master with full on‐path support to deliver high precision synchronization involves higher cost. Next generation networks need to handle rapidly growing traffic and require a more decentralized approach. The Assisted Partial Timing Support (ATPS) architecture is designed for these networks to deliver precise phase and frequency to the small cell. To support the increasing scale in such rapidly growing networks, Qg2 is highly field‐scalable to 256 PTP slaves in unicast mode at 128 packets per second.

Qg2 utilizes GNSS (GPS, Beidou& GLONASS), IEEE 1588 PTP and Synchronous Ethernet as input references and generates IEEE 1588 PTP, SyncE and timing signals(frequency,1PPS, and ToD) as outputs.TheMulti SyncGatewayfeaturesdualgigabitEthernetports and a small form-factor pluggable(SFP) module port for optical connections. It provides all the relevant timing interfaces such as GNSS, 1 Pulse Per Second (1PPS) and Time of Day (ToD) input/output. The true innovation in this product lies in its simplicity, high performance, scalability and cost effectiveness. The Qg2 has some unique features designed to make it easily manageable and provide resilient performance when reference sources are lost.


  • Sync platform designed for small cell clusters, C‐RAN and edge applications
  • Edge Grand Master for smart grid transmission and distribution substations
  • Gateway clock for Industrial IoT applications


  • Easy to deploy and cost‐effective small form‐factor solution
  • Scalable slave capacity
  • Low power consumption
  • High performance PTP clock
  • Simple, easy manageability
  • Configurable to operate in PTP Grand Master, APTS boundary and slave clock modes


  • Multiple holdover options
  • Full IEEE 1588‐2008 Grand Master
  • Telecom BC functionality
  • Supports G.8262 Synchronus Ethernet
  • ITU‐T G.8265.1 Frequency, ITU‐T G.8275.1 & G.8275.2 Time & Phase Profiles
  • ITU‐T G.8272 and G.8273.2 (T‐BC)
  • IEEE PC37.238 Power profile
  • Supports 1‐step & 2‐step clock
  • PoE and ‐48V DC
  • Remote provisioning & management (SNMP, XML & CLI)