White Rabbit Solutions

White Rabbit Solutions

When Every Second Counts... Count on White Rabbit from Seven Solutions

What is White Rabbit?

White Rabbit is a collaborative project including CERN (the European Organization for Nuclear Research), GSI Helmholtz Centre for Heavy Ion Research and other partners from universities and industry to develop a fully deterministic Ethernet-based network for general purpose data transfer and sub-nanosecond accuracy time transfer.

It provides sub-nanosecond synchronization accuracy, which formerly required dedicated hard-wired timing systems, with the flexibility and modularity of real-time Ethernet networks. A White Rabbit network may be used solely to provide timing and synchronization to a distributed electronic system, or to provide both timing and real-time data transfer.

Orolia has partnered with Seven Solutions to offer White Rabbit technologies to our customers.

Key Features

  • Reduces errors in time transfer with high accuracy phase and frequency time transfer
  • Scalable to long distances
  • Automatically calibrated links remove any potential offsets from variance between forward and reverse delays
  • Easy to integrate into existing network infrastructure
  • Utilizes standard Ethernet and extensions to PTP
  • Can operate over spare fiber next to existing network links
  • Can be multiplexed with data links using WDM (Wavelength Division Multiplexing)
Title
White Rabbit – The newest time protocol described here was developed in 2009 at CERN, the European Organization for Nuclear Research. White Rabbit is an extension of Ethernet and provides subnanosecond synchronization over 1G Ethernet networks.
pdf - 2 MB—  November 3, 2020 [ Permalink ]

Who is White Rabbit For?

Network engineers and architects who have a need for ultra-precise timing and synchronization solutions in financial services, datacenters, telecom/broadcast, defense, energy, aerospace, automotive, and science applications.

White Rabbit Benefits Include:

  • The White Rabbit protocol was conceived by CERN, one of the foremost scientific research institutions, and they actively collaborate in product design to ensure durability and quality.
  • All elements in White Rabbit solutions are modular to reduce maintenance and upgrade costs.
  • The White Rabbit protocol is open and enhances current protocols such as Precision Time Protocol (IEEE1588) or Synchronous Ethernet (Sync-E).

Key Technology Elements:

  • SyncE for Frequency Transfer
  • PTP for Time Transfer
  • Phase detector for frequency calibration/alignment
  • White Rabbit extends PTP with additional messaging for control set communication
  • SyncE clock is looped back from Master -> Slave -> Master and fed into phase detector to characterize links

The White Rabbit Ecosystem

Time Nodes
Distribution Devices
Licenses/Support

Zen TP-FL

WR Master or end node

  • ✔ High Accuracy Time Transfer
  • ✔ Long Distance Links

WR Z16

WR Distribution
  • ✔ High Accuracy Time Transfer
  • ✔ High Accuracy Fanout

    PTP License

    WR to PRP Interoperability

    • ✔ PTP message Types and Message Ratios
    • ✔ Profile Support

    WR LEN

    WR end node

    • ✔ High Accuracy Time Transfer

    ZEN TP 32BNC

    WR Distribution
    • ✔ High Accuracy Time Transfer
    • ✔ High Accuracy Analog Fanout

      Yearly Support

      Product Maintenance

      • ✔ Firmware Updates
      • ✔ Hotline Support

      How It All Fits Together

      system-approach.jpg

      White Rabbit Time Provider and End Node

      Fundamental standalone node/provider that delivers sub-nanosecond time transfer to a wide range of applications. Combines ultra-stable clocks with low jitter and temperature compensated clock resources to enhance synchronization accuracy in a 1U form factor.

      White Rabbit master/slave

      • 2x 1Gb SFP slots

      Timing signals/protocols

      • 1PPS, 10MHz, NTP inputs
      • 1PPS, 10MHz, NTP, PTP outputs

      Management

      • Web UI, SSH, console, SNMP, remote upgrade, monitoring
      Expansion
      • 4x 1PPS output module

      Redundant, hot-swappable power supplies

      Title
      The Seven Solutions fundamental standalone node that provides the White Rabbit features to a wide range of applications making use of its redundant connections. The WR-ZEN TP-FL easily distributes time and frequency to other equipment by implementing widely available timing protocols: PTP, NTP, 10MHz/PPS.
      pdf - 309 KB—  May 13, 2020 [ Permalink ]

      White Rabbit Distribution

      Durable fan-out clock for White Rabbit distribution on 1Gb Ethernet-based networks.

      White Rabbit master/slave

      • 16x 1Gb SFP slots

      Timing signals/protocols

      • 1PPS, 10MHz, NTP inputs
      • 1PPS, 10MHz, NTP, PTP outputs

      Management

      • Web UI, SSH, console, SNMP, remote upgrade, monitoring
      Expansion
      • 4x 1PPS output module

      Redundant, hot-swappable power supplies

      Title
      It is the Seven Solutions reliable precise time fan-out for White Rabbit distribution on 1G Ethernet-based networks. The WR-Z16 is a standalone device with 16 SFP connectors which provides sub-nanosecond accuracy time over plug-and-play fiber links.
      pdf - 315 KB—  May 13, 2020 [ Permalink ]

      White Rabbit Lite Embedded Node

      This stand-alone node provides high accuracy 1PPS/10MHz timing outputs through White Rabbit time transfer. Capable of supporting daisy chain configurations (more than 10 hops with sub-nanosecond timing). OEM version available for integration into customer systems.

      White Rabbit master/slave

      • 2x 1Gb SFP slots

      Timing signals/protocols

      • 1PPS, 10MHz outputs

      Management

      • Web UI, SSH, console
      Compact Size

      No configuration required for basic application

      Title
      It is the Seven Solutions competitive WR alternative capable of supporting daisy chain configurations. It allows a cost effective solution to distribute PPS/10MHz signals or IRIG-B protocol to your equipment.
      pdf - 393 KB—  May 13, 2020 [ Permalink ]

      WR ZEN TP 32BNC

      White Rabbit End Node with 1PPS/10MHz Distribution

      This node provides multiple, high accuracy 1PPS/10MHz timing outputs through White Rabbit time transfer. Combines ultra-stable clocks with low jitter and temperature compensated clock resources to enhance synchronization accuracy in a 2U form factor.

      White Rabbit master/slave

      • 2x 1Gb SFP slots

      Timing signals/protocols

      • 1PPS, 10MHz, NTP inputs
      • 1PPS, 10MHz, NTP, PTP outputs

      Timing Distribution

      • 16x 1PPS, 16x 10MHz outputs

      Management

      • Web UI, SSH, console, SNMP, remote upgrade, monitoring
      Expansion
      • 4x 1PPS output module

      Redundant, hot-swappable power supplies

      Title
      The Seven Solutions reliable node that provides multiple legacy 10MHz/xPPS timing outputs for all equipment in your rack cabinet through White Rabbit time transfer and its redundant connections. The WR-ZEN TP-32BNC easily distributes time and frequency to other equipment by implementing standard timing protocols such as PTP, NTP, IRIG-B, 10MHz/xPPS, etc.
      pdf - 343 KB—  May 13, 2020 [ Permalink ]

      PTP License for Zen Family

      Unleash the full potential of White Rabbit to PTP interoperability.

      Unlock the PTP message ratios for announce, sync, and delay request packets.

      Unlock other PTP profiles:

      • ITU-T G.8265.1 (Telecom Freq)
      • ITU-T G.8275.1 (Telecom Phase/Freq)

      IEEE C37.238-2011 (Power)

       Options With license Without license
      Profiles Default, G.8265.1, G.8275.1, C37.238.2011 Default
      Mode Master or slave Master or slave
      Transfer mode Multicast or unicast Multicast
      Unicast Negotiation Enabled or disabled Disabled
      Clock Class 0 – 255 0
      Announce Ratio -4 – 4 (16 msg/s – 1 msg 16s) 1 msg/s
      Sync Ratio -7 – 7 (128 msg/s – 1 msg 128s) 1 msg/s
      Delay Req Ratio -7 – 7 (128 msg/s – 1 msg 128s) 1 msg/s
      Delay Mechanism End to End (E2E) or Peer to Peer (P2P) End to End (E2E)
      Network Mode IPv4, IPv6, or Ethernet (Layer 2) IPv4
      Domain 0 – 255 0
      Priority 1 0 – 255 0
      Priority 2 Any number 0
      Offset Correction (ns) Any number 0
      BMCA Enabled or disabled Disabled
      Servo KP Any number 1
      Servo KI Any number 1

      Title
      It is the package that unleashes the full potential of the WR to PTP interoperability. WR-ZEN family, WR-LEN+ and DOWR easily distributes time and frequency to other equipment by implementing standard timing protocols such as PTP, NTP, IRIG-B, etc.
      pdf - 313 KB—  May 13, 2020 [ Permalink ]