M60 – Network Assisted Synchronization
for the Internet of Synchronized Things



  • Small cells synchronization
  • The Internet of Synchronized Things
  • Edge Grandmasters in Telecom Networks
  • Low Power GPS time to PTP converter
  • Power Grid PTP Synchronization server
  • Industrial Automation local time provider for remote I/O devices with multi time source synchronization.

In high accuracy networks the synchronization is often implemented as a combination of multiple technologies for performance, security and strategic reasons mixing new Grandmasters with old Primary Reference Clocks (PRC). As a member of the Qulsar family of synchronization modules the M60 syntonizes multiple sources and transmits and/or receives time, frequency and phase in networks.

Key Features

  • Grandmaster side and slave side modes
  • Multi time and frequency source synchronization
  • Full IEEE 1588-2008 ordinary clock implementation
  • Fully transparent, low latency, no impairment pass-through traffic
    for bump-on-the-wire applications
  • Configurable Loop control for complex multi-hop and congested networks
  • Hardware timestamping
  • Generic 1PPS +ToD time and phase interface
  • 5/10/20/25 MHz syntonized reference frequency
  • Configurable oscillator interface
  • Wirespeed gigabit Ethernet interfaces
  • Surface Mounted LCC device on a less than 30x30 mm board space
  • Less than 1200 mW power consumption
  • RoHS compliant

System Features

Network Interface

  • Upstream 1x GBE magnetics
  • Downstream 1x RGMII port
  • Wirespeed, low latency technology
  • Integrated TCP/IP stack
  • Fully transparent Pass-through Technology
  • IPV4 and IPV6 (PTP)

Synchronization Engine

  • SyncE
  • ToD and PPS inputs from External Sources
  • PTP with Hardware Timestamp Engine (TSE)
  • Best Master Clock algorithm
  • Master-slave (full) and slave-only state machines
  • Asymmetry correction.
  • Configurable loop control for adaptation to complex networks
  • Host/remote management.

New pass-through Technology

One of the innovative features of the M60 is its unique integration in an existing communication path. Its low latency, fully transparent data communication at gigabit speed sets new standards for applying high accuracy time, phase and frequency in large scale networks.


By replacing standard generic parts in already existing designs it is possible to deploy synchronization at virtually no extra costs on the slave side of a modern Ethernet based network. The same M60 hardware can also be used in high efficiency time and phase distribution ports of the Grandmaster on the server side of the network.

In a slave application the M60 module connects to the network transparently and without latency. It leaves existing switches and network nodes (hosts) unmodified. It acts as a true “bump on the wire,” filters out relevant synchronization information and forwards packets at linerate without impairing the traffic.

Multiple Time and Frequency Sources

The clock held by the module can be managed by several external references. Running in autonomous operation it always provides a synthesis of its best available inputs. In the case of the M60 these are:

By this synthesis of different methods, our customers can offer their customer products which are able synchronize to multiple state-of-the-art methods. The synthesis can work both autonomous and managed. The user can offer his customers several options, including turning its management over to the network operator for a remotely controlled synchronization scheme in a secure environment. The critical synchronization dependent quality of service can then be managed centrally by the network operator.

Design Philosophy

The design philosophy of the M60 is that of making the application of new large network synchronization available and affordable to low cost nodes in the network. This can only be achieved by miniaturizing the technology and making it disappear into other components.

PHY Replacement

With M60 we have chosen the physical line interface component, the PHY, as this device. This way the M60 can be used by all network capable equipment designers. The PHY has a generic functionality with standardized interfaces since a long time. In fact, the designer can just scratch out the PHY label of the box of the schematic and replace it by M60. The interfaces are the same: power supply, RGMII, and transformer. But in addition the M60 delivers synchronization by means of a syntonized frequency, PPS and ToD signals.

Zero Effort Integration of Synchronization

At power up the module reads its on-board .ini files to determine which modes to run and settings needed to comply with the network specification for distribution of synchronization. Using the factory pre-sets the designer interaction is minimized and the inclusion of the synchronization service a zero integration effort.

Data sheet


  • Wirespeed 1 Gbit/s pass-through
  • Synchronous Ethernet Support

As PTP Master

  • Accuracy: +/-25 ns *)
  • Holdover: tbd
  • Output Sync rate: up to 128 Hz
  • Number of slaves: up to 250**)

As PTP Slave

  • Supports one-step and two-step masters
  • Input sync rate: up to 128 Hz
  • Accuracy: up to +/-50 ns ***)
  • Holdover: customer specified

Input synchronization interfaces

  • PPS-in: 1 Hz
  • TOD-in: TTL, 4800/9600 bps, via dedicated pin port up to 115200 bps via serial port
  • PTP: Ethernet /UDP/IPv4/IPv6 (L2 or L3)

*) deviation from GPS time, depending PPS-input quality

**) with 1 Hz sync and 1 Hz delay request rates

***) depending on master quality and network condition.

Output synchronization interfaces


  • FREQ-out: 5/10/20/25 MHz
  • PPS-out: up to 2 kHz with 1us resolution
  • TOD-out: TTL, 4800/9600 bps, via dedicated pin port up to 115200 bps via serial port
  • PTP: over Ethernet or UDP/IPv4/IPv6 (L2 or L3)

ToD Format (both Input and Output)

  • NMEA
  • Binary
  • China Mobile (optional)

Other features

  • DHCP client
  • FTP server
  • TELNET server
  • SSH server
  • Serial terminal
  • Remote firmware upgrade
  • Configurable in every aspect via command-line interface (over Telnet, SSH or serial port Terminal)

Block Diagram

M60 Block diagram

Technical Specifications

Ordering Information


*) In-system power consumption when running 128 sync messages and 64 delay requests per second. Includes PHY consumption. The processor uses less than 5% of this and requires no extra cooling.

Qulsar may make changes to specifications and product descriptions at any time, without notice.

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