Outdoor Integrated Grandmaster IGM and IGM Plus: IGM 1100o

Integrated GNSS Master: IGM-1100o

Product Information

IEEE 1588 small edge grandmaster for outdoor installations

Various factors including building materials, low GNSS signal strength or other constraints sometimes interfere with indoor small cell synchronisation using GNSS PTP grandmaster timing systems. Solving this challenge is Microchip’s outdoor integrated grandmaster, the IGM 1100o.

The compact IGM 1100o delivers precise time indoors to serve indoor small cells. However, IGM 1100o is ruggedized to support a wider temperature range, so that it can be installed on a building rooftop, instead of an interior wall or ceiling.

This integrated grandmaster can also be used in environments such as outdoor cabinets and huts where temperature range constraints and environmental ruggedness are key requirements. As a result, Microchip’s outdoor grandmaster can serve eNodeBs from the very edge of the mobile network with very few hops to the node and is ideal for mobile edge deployments for LTE-A, 5G, and DOCSIS3.1.

Solving GNSS reception issues

Being installed outdoors where GNSS reception is optimal, Microchip’s outdoor IGM does not need assisted GNSS. In urban canyons or other settings where GNSS reception is problematic, however, the IGM 1100o can leverage assisted GNSS. Use of Power over Ethernet (PoE) further simplifies the installation of the outdoor IGM. Once installed on the roof and network connected with PoE, Microchip’s integrated grandmaster automatically self-configures through DHCP, locks on to GNSS signals, and begins PTP grandmaster operations, precluding the need for on-premises user configuration.

Using the same software across the IGM grandmaster family, mobile operators can facilitate densification with enhanced management options, more reliability through GNSS backup, greater scalability with IPv6 and increased client support.

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

Key Benefits

  • Reduced installation costs and simplified cabling
  • Plug-and-play features reducing deployment time and cost
  • Ruggedized temperature support, capable of providing precise time in environmentally challenged settings
  • Best-in-class synchronization solution for phase requirements at the edge of mobile networks


  • Small form factor with single 1 GbE RJ45 port
  • Supported PTP profiles: ITU-T G.8265.1 (L3 unicast), 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, output
  • Unique ability to provide GPS backup by accepting PTP input
  • Increased PTP client scalability to a maximum of 60
  • Primary Reference Time Clock (PRTC) compliant
  • IPv6 support for 1588 traffic and OAM/Management
  • 802.1Q VLANs
  • Integrated GNSS receiver
  • GPS, GLONASS, Beidou, Galileo, QZZ, and SBAS
  • Cable compensation to address GPS cable length

The Chronos difference

The innovative IGM grandmaster portfolio enables the most cost-effective indoor or outdoor deployments at the mobile network edge. Contact our team to find the right solution for your needs.

Key Features

  • Integrated GNSS Grandmaster (IGM-1100o) Attributes
  • Small form factor with single 1 GbE RJ45 port
  • G.8265.1 (L3 unicast), G.8275.1 (L2 multicast), Telecom 2008 & default profile
  • One-step and two-step clock
  • SyncE hardware support
  • Support [0-7] CoS as per 802.1Q
  • 802.1Q VLANs
  • Integrated GNSS receiver
  • GPS and Glonass - Beidou, SBAS, Galileo-ready
  • Management
  • In band via Ethernet port
  • IPv4
  • TimePictra support through SNMP, fault only
  • TR-069 configuration
  • CLI over SSH2
  • SNMP V2 & V3
  • Internal Log
  • Outputs
  • PTP Grandmaster
  • 1PPS Test Point
  • Diagnostics
  • Alarms: SNMP traps
  • LEDs: Network, Sync, Alarms
  • Plug & Play
  • Auto-configuration via TR-069 to ACS
  • Communicate with external servers (DHCP or static IP, ACS, etc)
  • Redundancy
  • Achieved by deploying 2 or more IGM units at a site with client fail-over capabilities
  • Power
  • PoE Class 3 input
  • Power < 12.95 Watts
  • Capacity
  • Base model: 4 unicast slaves @128 pkts/sec
  • Upgrade to 8 and 16 PTP unicast slaves by license
  • Mechanical
  • Size Diameter: 6 in, Height: 4 in
  • Weight: 1.5 lbs
  • Installation
  • Mounting: Pole-mount on roof
  • Safety
  • UL 60950-1/60950-22, CSA C22.2 No. 60950-1, EN 60950-1 w/CE Mark, IEC 60950-1 w/CB Scheme, Low Voltage Directive 2014/35/EU
  • EMC
  • EMC Directive 2014/30/EU Class B
  • GR1089-CORE, FCC Part 15, ICES-003, VCCI, AS/NZS CISPR 22, ETSI, EN
  • 55022/EN55024, KN55032?KN55035 and BSMI
  • Environmental
  • ETSI 300 019-2-1 Storage Tests Class T1.2
  • ETSI 300 019-2-2 Transportation Tests Class T2.3
  • ETSI 300 019-2-4 Operational Tests Class T4.1E
  • GR3108 NEBS/ GR63 NEBS
  • 1.3 Expected Operational Temperature and Humidity Range
  • 4.7 Operating Altitude to 6,000 ft. and 13,000ft. per ATIS 0600010.01.2008
  • -40oC to 46oC + solar load (optional 70oC) -40oC to +70oC
  • < 5% to 100% RH with Condensation
  • 6.1 Salt Fog Exposure
  • 6.2.2 Seismic under GR-63 and ANSI T1-329
  • 6.2.3 Frailty Shock 7g, 30msec
  • 6.3 Pollutant and Corrosive Gas Exposure Hygroscopic Dust of Section 5.5.3 of GR-63 and GR-1274
  • 6.4 Fire Resistance ATIS-0600307 - all Classes
  • RoHS 2 Directive 2011/65/EU
  • WEEE Directive 2012/19/EU