CDM-625A Advanced Satellite Modem MN-CDM625A
Ethernet-based Remote Product Management Revision 4
7–59
availability of the PTP protocol is dependent on the near-end (e.g., the RNC/BSC) and
distant-end (e.g., the BTS) IEEE 1588v2 (PTP) capable network devices in the network.
• Grandmaster – Use the drop-down list to assign from which port the PTP Grandmaster
receives messages: the LAN port or the WAN port.
• Transport Mode – Use the drop-down list to select Unicast or Multicast:
o If you select Unicast, Unicast negotiation is enabled and the PTP Domain number is set
to 4.
o If you select Multicast, Multicast negotiation is enabled and the PTP Domain number is
set to 0.
• Uni
cast Sync Interval – Use the drop
-do
wn list to select the synchronization interval of
packets per second for messages sent from the Master to the Slave. Available selections are:
• 1 message every 2 seconds
•
•
Use Unicast Sync Interval only when the Grandmaster is LAN port and the
Transport Mode is Unicast.
Click [Submit] to save.
Status
Click [Refresh] to update this section with its most recently accumulated statistics.
These status parameters are read-only and cannot be changed. Note the following:
Top
Specifies whether or not PTP is actively attempting to synchronize time.
PTP Time
Displays the time that is synchronized with the master device and is
being propagated to the slave devices.
Middle
PTP Port
Displays whether or not the Ethernet link is detected. The PTP Port is
always Ethernet Port 2 on the modem.
RTC Time
Displays the presumed time for the modem. While the PTP time depends
on the Grandmaster device, the RTC Time changes only when set by the
Bottom PTP Domain
Identifies the PTP Domain as ‘0’ when in Multicast Transport Mode, or ‘4’
when in Unicast Transport Mode.
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