Alcatel-Lucent 7210 SAS M - Synchronization Status Messages (SSM)

System Basics Introduction
Page 220 7210 SAS M, T, X, R6 Basic System Configuration Guide
Synchronization Status Messages (SSM)
The SSM provides a mechanism to allow the synchronization distribution network to both
determine the quality level of the clock sourcing a given synchronization trail and to allow a
network element to select the best of multiple input synchronization trails. Synchronization Status
messages have been defined for various transport protocols including SONET/SDH, T1/E1, and
Adaptive
Clock
Recovery
(ACR)
Not Supported Not Supported Supported
only when T1/
E1 CES MDA
is used only in
network mode.
Available only
for distributing
recovered
clock to T1/E1
ports. Cannot
be used for
system clock
reference.
Not Supported Not Supported
1588v2/PTP
with Port-
based
timestamps
(both for
frequency &
time – also
known as PTP
pure mode)
Not Supported Not
Recommended
for use
Supported.
PTP pure
mode with
lesser scaling
can be used.
Supported Supported
1588v2/PTP
with Port-
based
timestamps
(time only
with SyncE
used for
frequency
recovery –
also known as
PTP hybrid
mode)
Not Supported Supported
only on 7210
SAS-D ETR.
Only PTP
hybrid mode
recommended
for use
Supported.
PTP hybrid
mode
recommended
for use.
Not Supported Supported
Table 20: Synchronizations Option available on 7210 SAS platforms
Platform 7210 SAS-E 7210 SAS-D 7210 SAS-M 7210 SAS-T 7210 SAS-X