Comtech EF Data CDM-425, Инструкция по установке и эксплуатации

Страница: 294 / 744

CDM-425 Advanced Satellite Modem
Revision 0
Ethernet-based Remote Product Management 7–70 MN-CDM-425
PTP
•
Feature: Use the drop-down list to set PTP operation as Enabled or Disabled.
o
If Enabled , PTP is used to establish independent Wireless Receiver/Transmitter
(WRT) protocol segments – one for LAN and the other for WAN.
o
If Disabled , by default the 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.
•
Unicast Sync Interval: Use the drop
‐
down 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
•
1 message per second
•
2 messages per
second
•
4 messages per second
•
8 messages per
second
•
16 messages per
second
•
32 messages per second
•
64 messages per
second
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:
Row Title Description
Top
PTP Engine 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 user.
Bottom PTP Domain
Identifies the PTP Domain as ‘0’ when in Multicast Transport Mode, or ‘4’ when
in Unicast Transport Mode.