IGM-1100x IGM and IGM Plus for External GNSS Antenna

IEEE 1588 Small Edge Grandmaster


In certain scenarios, there may be a pre-existing GNSS antenna in a location where the GNSS cabling would be short enough to be inexpensive and easily installed. In such a situation, the most cost-effective solution is to deliver precise time and phase with a low-cost IEEE 1588 PTP grandmaster connected to the external GNSS antenna.

Microsemi’s small form factor IEEE 1588 IGM grandmaster (IGM 1100x) with integrated GNSS receiver and external antenna delivers precise time in scenarios where a GNSS antenna is already deployed, or where it would be cost-effective to deploy, such as a small, one-story building, rack, hut, or a cabinet. A single Ethernet connection is used for auto-configuration management, with Power over Ethernet used for IGM and PTP grandmaster operations to precisely synchronize eNodeBs. The plug-and-play operation, leveraging DHCP, is meant for quick and easy installation similar to installing a typical indoor Wi-Fi antenna hot spot.

IGM 1100x provides a cost-effective alternative to existing 1588 grandmasters that typically present space, power, and cost consideration hurdles.

Microsemi offers a unified software across the IGM grandmaster portfolio, facilitating densification for mobile operators through enhanced management options, more reliability through GPS backup, greater scalability with IPv6, and increased client support. IGM is ideal for mobile edge deployments for LTE-A, 5G, and DOCSIS3.1 cable environments.

New Hardware Model: IGM Plus for Release 3.0

Release 3.0 features a new hardware model with an upgraded GNSS receiver adding Galileo and QZSS support and an upgraded mini OCXO oscillator for enhanced time keeping and holdover performance.

New Software Capabilities for Release 3.0

  • Increased scalability up to 60 PTP clients
  • Support for IPv6 OAM/Management, in addition to IPv6 support for PTP traffic
  • Automated configuration of a large number of devices with Zero Touch Provisioning (ZTP) through DHCP (option 43)
  • Enhanced support for individual device configuration with full CLI

Key Benefits

  • Leverages existing GNSS antennas when available
  • Small form factor 1588 PTP grandmaster
  • Enables most cost-effective mini grandmaster deployments at the very edge of mobile networks
  • Plug-and-play features reduce deployment time and cost
  • Best-in-class sync solution
  • Serves precise time and phase to locations such as racks, small buildings, huts, and cabinets
  • Deployment flexibility (small size, wall or ceiling mount, and indoor)

Integrated GNSS Grandmaster (IGM 1100x) Features

  • Small form factor with single 1 GbE RJ45 port
  • Supported PTP profiles: ITU-T G.8265.1, ITU-T G.8275.1 (L2 multicast), ITU-T G8275.2 (L3 unicast), Telecom 2008 and Ethernet default
  • One-step and two-step clock
  • Synchronous Ethernet (SyncE) input and output
  • Unique ability to provide GPS backup by accepting PTP input
  • APTS, asymmetry compensation
  • Primary Reference Time Clock (PRTC) compliant
  • Increased PTP client scalability to a maximum of 60
  • IPv4 and IPv6 support for both PTP and OAM/Management
  • Cable compensation to address GPS cable length
  • 802.1Q VLANS
  • GNSS receiver
  • GPS, Glonass, Beidou, Galileo, QZSS, and SBAS
  • Time to First Fix (TTFF) of 10 minutes to less than one hour until system lock

Additional information