Sub-nanosecond White Rabbit timing node — deterministic last-mile sync at the edge.
Sub-ns
Accuracy to WR master
4 × WR
Ports
10
Freq outputs
< 10 W
Power draw
Gallery
Three WR nodes in 1RU
Three WR nodes in 1RU
3D angle — chassis and front ports
3D angle — chassis and front ports
Front panel — White Rabbit SFP, 1PPS & 10 MHz
Front panel — White Rabbit SFP, 1PPS & 10 MHz
In the rack — deployed
In the rack — deployed
Rear panel — 12 V DC and reference I/O
Rear panel — 12 V DC and reference I/O
Top-down — chassis lid
Top-down — chassis lid
In the rack — front detail
In the rack — front detail
Internal layout — FPGA and oscillator
Internal layout — FPGA and oscillator
Open chassis — board-level detail
Open chassis — board-level detail
GNSS-denied. Still sub-nanosecond.
What it is
The Open Time Node WR is a compact, rack-optimised White Rabbit node engineered to deliver sub-nanosecond synchronisation to edge systems. It accepts a White Rabbit input, supports WR, IEEE 1588 PTP and SyncE simultaneously, and outputs stable, traceable reference signals — 10 MHz, 1 PPS and configurable additional outputs — enabling deterministic, ultra-low-jitter clock distribution across critical infrastructure. Housed in a 1RU-compatible chassis (up to three nodes per 1RU), it's the right answer for space-constrained data centres, telecom racks and labs.
White Rabbit protocol
Born at CERN. Deployed across national infrastructure. Now in a 250 mm chassis that fits three per rack unit.
Sub-ns
Sync accuracy
4 × SFP
WR ports
10
Freq outputs
< 10 W
Power
Sub-nanosecond sync. No GNSS required.
Tell us your fibre topology and oscillator preference — we'll confirm the right configuration, pricing and lead time within one business day.
Capabilities
3 / 1RU DENSITY
Independent WR nodes, <10 W each
4 × WR SFP
Fan out to downstream nodes
10 FREQ OUTPUTS
10 MHz · 1 PPS · configurable
The WR protocol is an ultra-precise extension of PTP enhanced with SyncE for deterministic time and frequency transfer — deployed by CERN and designed for metro-scale and long-haul optical networks.
A built-in monitoring engine continuously evaluates WR, PTP and 1 PPS / 10 MHz inputs, transparently switching between references when a degradation or failure is detected.
Distribute White Rabbit, IEEE 1588 PTP, SyncE and standard 10 MHz / 1 PPS outputs.
Fan out White Rabbit to four downstream nodes, or distribute 10 frequency references to lab and instrumentation gear — all from a single 1 U-compatible unit.
Compact 250 × 105 × 40 mm chassis means three independent WR nodes fit in one rack unit. Under 10 W per node keeps power and cooling manageable at scale.
White Rabbit's sub-nanosecond precision demands an equally precise signal-processing layer. The TimeBeat jitter attenuation engine eliminates the last residual noise sources — fibre-path asymmetry, SyncE phase wander and WR protocol jitter — to deliver the cleanest possible clock output to downstream equipment.
Specifications
Sync & capabilities
Outputs
Physical
Where it works
Use case 01
Precise synchronisation across radio access network infrastructure where PTP alone isn't tight enough. Sub-ns accuracy keeps cell sites and fronthaul in lockstep.
Use case 02
Sub-nanosecond timestamps and MiFID II / CAT compliance without GNSS dependency. When your edge is measured in ticks, White Rabbit is the answer.
Use case 03
Lab equipment, DAQ systems and measurement instruments that need clean 10 MHz and 1 PPS references without spurs or phase drift — from fibre, not GNSS.
Use case 04
Consistent, low-jitter timing across distributed computing clusters. Database commits, HPC workloads and quorum systems all benefit from deterministic sync.
Free download
Full specs, block diagram and ordering information — emailed to you instantly.
Seen your deployment in one of these?
Get a quote for your WR network — topology, node count, oscillator tier and lead time in one response.
In your network
Sub-nanosecond over dark fibre · GNSS-denied deployment · < 1 ns accuracy
Watch the demo
Hardware walkthrough, White Rabbit network setup and first sync.
White Rabbit protocol over optical fibre — how CERN-born technology delivers sub-nanosecond accuracy inside buildings, tunnels, and data centres where satellites don't reach.
Get pricing
Tell us your fibre topology, oscillator preference and how many nodes. We’ll respond within one business day.
Library
White Rabbit protocol guides, deployment notes and engineering resources.
White Rabbit — the sub-nanosecond fibre-distributed timing protocol developed at CERN — is moving out of physics labs and into financial trading floors, AI training clusters and quantum networking testbeds. What it actually does, and why precision below one nanosecond is now a commercial requirement.
