CDM-625A Advanced Satellite Modem
MN-CDM625A
Appendix K
Revision 4
K–15
K.7 Advanced Network Timing
K.7.1 Overview
The Advanced Network Timing (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).
K.7.2 SNTP (Simple Network Time Protocol)
The
Simple Network Time Protocol (SNTP)
, defined in RFC-1361, provides millisecond-
resolution time synchronization with a time server. When the modem synchronizes its time, it also
synchronizes the time of all connected EDMAC devices, such as slave LPODs or CSATs. When all
devices are synchronized, administrators can better correlate logged events between devices.
SNTP is a UDP protocol that works on port 123. If the modem is not updating its time, verify that
there are no network devices between the modem and time server that might block UDP packets
on that port.
K.7.3 PTP (Precision Time Protocol)
For better PTP clock accuracy, ingress and egress port sync interval should be at
least 2 seconds.
Figure K-13. Configuration Example – Point-to-Point Network with PTP
Содержание CDM-625A
Страница 2: ......
Страница 4: ...ER CDM625A EA4 Rev...
Страница 6: ...ER CDM625A EB4 Rev...
Страница 8: ...ii BLANK PAGE...
Страница 34: ...CDM 625A Advanced Satellite Modem MN CDM625A CD MN CDM625A Table of Contents Revision 4 xxviii BLANK PAGE...
Страница 42: ...CDM 625A Advanced Satellite Modem MN CDM625A Preface Revision 4 xxxvi Notes...
Страница 82: ...CDM 625A Advanced Satellite Modem MN CDM625A Installation Revision 4 2 6 Notes...
Страница 118: ...CDM 625A Advanced Satellite Modem MN CDM625A Updating Firmware Revision 4 4 14 Notes...
Страница 124: ...CDM 625A Advanced Satellite Modem MN CDM625A FAST Activation Procedure Revision 4 5 6 Notes...
Страница 200: ...CDM 625A Advanced Satellite Modem MN CDM625A Front Panel Operation Revision 4 6 76 Figure 6 3 Loopback Modes...
Страница 230: ...CDM 625A Advanced Satellite Modem MN CDM625A Front Panel Operation Revision 4 6 106 Notes...
Страница 314: ...CDM 625A Advanced Satellite Modem MN CDM625A Ethernet based Remote Product Management Revision 4 7 84 Notes...
Страница 579: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix B Revision 4 B 43 Figure B 25 VersaFEC 2 Short Block...
Страница 580: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix B Revision 4 B 44 Figure B 26 VersaFEC 2 Short Block...
Страница 582: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix B Revision 4 B 46 Notes...
Страница 595: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix E Revision 4 E 5 Figure E 2 RX Clock Modes...
Страница 638: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix F Revision 4 F 32 Notes...
Страница 642: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix G Revision 4 G 4 Notes...
Страница 666: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix K Revision 4 K 18 Notes...
Страница 684: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix M Revision 4 M 4 Figure M 1 ACM over Satellite Generic Example...
Страница 704: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix M Revision 4 M 24 Notes...
Страница 712: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix M Revision 4 M 32 Notes...
Страница 722: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix Q Revision 4 Q 2 Notes...
Страница 738: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix R Revision 4 R 16 Notes...
Страница 754: ...CDM 625A Advanced Satellite Modem MN CDM625A Appendix U Revision 4 U 6 Notes...
Страница 755: ......
Страница 756: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...