Alcatel-Lucent 7450 - PTP Ordinary Master Clock for Frequency

Network Synchronization
272 Basic System Configuration Guide
Figure 21: Ordinary Slave Clock Operation
PTP Ordinary Master Clock For Frequency
The router supports the PTP ordinary clock in master mode. Normally, a IEEE 1588v2 grand
master is used to support many slaves and boundary clocks in the network. In cases where
only a small number of slaves and boundary clocks exist and only frequency is required, a
PTP integrated master clock can greatly reduce hardware and management costs to
implement PTP across the network. It also provides an opportunity to achieve better
performance by placing a master clock closer to the edge of the network, as close to the slave
clocks as possible. Figure 22 shows a PTP master clock network configuration.
Figure 22: PTP Master Clock
Packet
Network
MDA
Central
Clock
1588
Clock
Internal
(Node)
Timing
Reference
MDA
1588v2
Grand
Master
CPM A
B
1588v2
Grand
Master
OSSG738
Packet
Network
TDM/SyncE
Network
PRC
PTP Slave
PTP Slave
PTP Slave
PTP
Master
Clock
OSSG739