About White Rabbit / High-Accuracy Technology - Safran WR-ZEN Series User Manual

1.4 About White Rabbit / High-Accuracy Technology
nodes of the timing network, where different timing interfaces are provided to
inter-operate with third-party equipment.
The WR-Z16 devices and the WR-ZEN family (WR-ZEN TP, WR-ZEN TP-FL, WR-
ZEN TP-32BNC) run on the same platform (WRZ-OS) sharing the same features,
timing stack and set of tools.
All the devices running the WRZ- OS provide multiple interoperability options
that include 1PPS/10 MHz signals, PTP, and NTP. They support SNMP v2/v3, rsys-
log, and have an integrated web GUI for intuitive management and enhanced
command line tools for advanced users. The following list contains the different
form factors offered within the WR-ZEN family and a brief description of their
main characteristics:
1.4

About White Rabbit / High-Accuracy Technology

One of the key-features of the WR-ZEN family is that it fully supports the White
Rabbit (WR) protocol, an extension of the IEEE 1588 (PTP), to achieve ultra-
accurate sub- nanosecond synchronization in Ethernet- based networks. White
Rabbit is the basis for the new High Accuracy (HA) profile in the latest PTP stand-
ard IEEE 1588-2019, and has the following characteristics:
4
WR-ZEN TP-FL: A fundamental, cost-effective 1U form factor version of the
WR-ZEN TP. It has a front dual power supply. It includes 1PPS/10 MHz SMA
outputs and PTP interoperability on its management interfaces. It can
include a 4 x 1PPS expansion on demand.
WR-ZEN TP: Standard 1U form factor version of the time provider. It
accepts multiple fans and it has a rear dual power supply. It includes mul-
tiple 1PPS/10 MHz on the SMA or DB9 outputs, PTP interoperability on its
management interfaces, IRIG-B, NMEA and ToD.
WR-ZEN TP-32BNC: Expanded 2U form factor version of the WR-ZEN TP.
It has a front dual power supply. It includes 1PPS/10 MHz SMA outputs and
PTP interoperability on its management interfaces. The main characteristic
is that it includes 32 BNC ports configured to work as 16 x 1PPS and 16 x 10
MHz outputs. A configuration with 32 x 1PPS is possible with an optional
PPS expansion license.
Time Precision: WR provides a common clock for physical layer in the entire
network, allowing synchronization at sub-nanosecond level with pico-
seconds precision. In other words, the timing budget consumed by WR is
almost insignificant.
Scalability: WR networks are designed to be highly scalable supporting
thousands of nodes and long-distance links within the range of metro area
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1 WR-ZEN Series User Manual Rev. v5.1