Network Synchronization; Figure 9: Conventional Network Timing Architecture (North American Nomenclature) - Alcatel-Lucent 7210 SAS M Basic System Configuration Manual

Network Synchronization

This section describes network synchronization capabilities available on 7210 SAS platforms.
These capabilities involve multiple approaches to network timing listed below:
•
•
These features address barriers to entry by:
•
•
Network synchronization is commonly distributed in a hierarchical master-slave topology at the
physical layer as shown in
Stratum 1
Gateway
Class 1 or 2 CO
Stratum 2
Class 2 or 3
Central Office
Stratum 3
Class 4 or 5
Toll/End Office
Stratum 4
Customer
Prem

Figure 9: Conventional Network Timing Architecture (North American Nomenclature)

The architecture shown in
7210 SAS M, X Basic System Configuration Guide
Synchronous Ethernet
Adaptive clocking.
Providing synchronization quality required by the mobile space; such as radio operations
and circuit emulation services (CES) transport.
Augmenting and potentially replacing the existing (SONET/SDH) timing infrastructure
and delivering high quality network timing for time sensitive applications in the wireline
space.
Figure
ST 2
ST 3 ST 3
ST 4 ST 4
Primary Reference
Secondary Reference
Figure 9
9.
Primary Reference Clock
ST 3
ST 4 ST 4 ST 4
provides the following benefits:
System Management
ST 2
ST 3 ST 3
ST 4 ST 4
OSSG287
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