User's Guide Part 1

Table Of Contents
Chapter 1: Product description Ethernet bridging
Further reading
For information about…
Refer to…
Relationship between synchronous
Ethernet and TDM
TDM description on page 1-33
Availability of synchronous Ethernet Capability upgrades on page 1-51
Relationship between synchronous
Ethernet and Ethernet port allocation
Additional port allocation rules on page 3-44
How to configure synchronous Ethernet LAN Configuration page on page 6-34
Upgrading to synchronous Ethernet Generating license keys on page 6-3
Synchronous Ethernet status indicators Synchronous Ethernet on page 7-10
Synchronous Ethernet alarms Alarms on page 7-17
IEEE 1588-2008 Transparent Clock
PTP 700 is capable of operating as an IEEE 1588-2008 Transparent Clock. When operational,
IEEE 1588-2008 event frames (Sync, Delay_Req, Pdelay_Req, Pdelay_Resp) have their
“Correction Field” adjusted to reflect the residence time of the frame in the system. This results
in greatly improved performance of downstream 1588-2008 slave clocks. The Transparent
Clock feature is available at the Main PSU Port and at the SFP Port when a fiber SFP module is
installed.
Unicast and multicast addressing models are supported, along with UDP over IPv4 or IPv6, and
Ethernet communication services. The IEEE 1588 messages can be encapsulated in Untagged,
C-tagged, S-tagged, S-C-tagged and C-C-tagged Ethernet frames.
Note
For the most accurate residence time corrections, use Synchronous Ethernet in
conjunction with the Transparent Clock feature. In this configuration, PTP 700 uses the
Synchronous Ethernet clock to increase the accuracy of 1588 residence time
measurements.
Page 1-31