Comtech EF Data CDM-625 - Manual (Page 248)

CDM-625 Advanced Satellite Modem Revision 15
Ethernet-based Remote Product Management MN-CDM625
6–56
6.5.4.3.11 Configuration | ANT (Advanced Network Timing) Pages
Sect. 16.7 Advanced Network Timing (ANT) (Chapter 16. ETHERNET NETWORK
CONFIGURATION)
The ANT feature provides IP-based protocols to synchronize the modem's internal time-of-day
clock to an external device such as a time server, Base Station Controller (BSC), or Radio
Network Controller (RNC).
Select the PTP or SNTP tab to continue.
6.5.4.3.11.1 Configuration | ANT | PTP (Precision Time Protocol)
Sect. 16.7.3 PTP (Precision Time Protocol) (Chapter 16. ETHERNET NETWORK
CONFIGURATION)
If the optional IP Packet Processor card is installed and enabled, then the
‘Configuration | ANT | PTP menu, while selectable, are not functional.
All network devices between the Grandmaster and Slave devices must support PTP
for sub-microsecond accuracy.
PTP (Precision Time Protocol) is a FAST-activated feature used to synchronize computer clocks
throughout a computer network. On LANs, PTP achieves clock accuracy in the sub-microsecond
range – much more accurate than what is attainable by NTP (Network Time Protocol) – and it is
also used in network applications where GPS is either unaffordable or inaccessible.
Figure 6-30. Configuration | ANT | PTP page
PTP
• Feature – Use the drop-down list to set PTP operation as Enabled or Disabled.
If Enabled, PTP is used to establish independent Wireless Receiver/Transmitter (WRT)
protocol segments – one for LAN and the other for WAN. If Disabled, by default the