Siemens RUGGEDCOM RS416P, Руководство по установке, Страница: 16 / 54

Chapter 1
Introduction
RUGGEDCOM RS416P
Installation Guide
6 Supported Time Synchronization Sources
T
T
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IN
T
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O
U
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1 2
Figure 2: PTP Module
1. TTL OUT Port 2. TTL IN Port
For more information about the BNC ports, refer to Section 4.5, “BNC Ports” .
CONTENTS
• Section 1.6.1, “Supported Time Synchronization Sources”
• Section 1.6.2, “TTL Outputs”
• Section 1.6.3, “IEEE 1588 Support”
Section 1.6.1
Supported Time Synchronization Sources
The following time synchronization sources are supported by the RUGGEDCOM RS416P, with or without the PTP
card:
Synchronization Source Without PTP Card With PTP Card
NTP
ü ü
IEEE 1588 v2
ü ü
IRIG-B PWM
û ü
NTP
NTP (Network Time Protocol) is the standard for synchronizing the clocks of computer systems throughout the
Internet and is suitable for systems that require accuracies in the order of 1 ms.
IRIG-B PWM
IRIG-B time synchronization is an even older, established, inter-device time synchronization mechanism providing
accuracy in sub-milliseconds.
IEEE 1588
IEEE 1588 is designed to provide networked, packet-based time synchronization between different networking
nodes (PTP devices). The RUGGEDCOM RS416P supports PTP v2, which is defined in the IEEE 1588-2008 standard.
IEEE 1588 is designed to fill a niche not well served by either of the two older, dominant protocols, NTP and IRIG-
B. IEEE 1588 is also designed for applications that cannot bear the cost of a GPS receiver at each node or for which
GPS signals are inaccessible.