82P33731_16 Datasheet, PDF (14/68 Pages) IDEA.lnc. – Synchronous Ethernet

82P33731 Datasheet
3
FUNCTIONAL DESCRIPTION
3.1
SYNCHRONOUS ETHERNET (SYNCE), SONET,
AND SDH SYSTEM ARCHITECTURES
82P33731integrates key features that allows the device to be used in
Synchronous Ethernet, SONET and SDH applications. There are sev-
eral key synchronization standards that are important to meet for such a
system, they are:
• ITU-T Recommendation G.8262, Timing characteristics of Syn-
chronous Ethernet Equipment slave clock (EEC)
• ITU-T Recommendation G.8264, Distribution of timing through
packet networks
• ITU-T Recommendation G.812, Timing requirements of slave
clocks suitable for use as node clocks in synchronization networks.
• ITU-T Recommendation G.813, Timing characteristics of SDH
equipment slave clocks (SEC).
• GR-253-CORE - Telcordia Technologies Generic Requirements -
Issue 5, October 2009
• GR-1244-CORE - Telcordia Technologies Generic Requirements -
Issue 4, October 2009
• ATIS-0900101.2006 - T1.101 - Synchronization Interface Standard
Figure 4 shows a single blade architecture that it is usually used in
simple equipment. As an example, for a specific 10G PHY, the maximum
jitter requirement is 0.3ps from 10 kHz to 20 MHz. The 82P33731 does
meet this tight jitter requirement.
Single
Blade
BITS/SSU
A
SyncE (T0) ^PL
L
T4
SyncE-TxCK
SyncE-RxCK
LOS
SyncE/
SONET
/SDH
PHY
CDR
Ethernet
TCXO
Figure 4. SyncE/SONET/SDH single blade application
Figure 5 shows an active/redundant architecture, as described
before it is usually used in Telecom equipment that are designed to have
a redundant timing card in case of primary timing card failure. The
redundant timing card mimics the output of the active timing card, so in
case of failure the system will still provide proper synchronization.
©2016 Integrated Device Technology, Inc.
14
Revision 5, December 8, 2016